Patent Publication Number: US-9842460-B2

Title: Gaming machine

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority from Japanese Patent Application No. 2014-138041, filed on Jul. 3, 2014, which application is incorporated herein by reference in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to a gaming machine having a radiation mechanism. 
     BACKGROUND OF THE INVENTION 
     Traditional gaming machines having a radiation mechanism are disclosed, for example, in Japanese Unexamined Paten Publication No. 154699/2008. Generally, in these gaming machines, external air is taken into a casing to cool down a control board and a power source device. The external air after being used for cooling is discharged outside the casing. 
     BRIEF SUMMARY OF THE INVENTION 
     In each of the above traditional gaming machines in general, an air intake duct is usually arranged in the casing of the gaming machine, additionally to the structures of the casing. This causes an increase in the number of components for the radiation mechanism, and causes difficulties in realizing a compact casing. Further, in many cases, an exhaust mechanism for discharging the air used for cooling the control board and another exhaust mechanism for discharging the air used for cooling the power source device are separately provided. This also causes an increase in the number of components for the radiation mechanism, and causes difficulties in realizing a compact casing. 
     It is an object of the present invention to provide a gaming machine whose casing is made compact with a reduced number of components of a radiation mechanism. 
     An aspect of the present invention is a gaming machine comprising a casing accommodating therein a substrate box having therein a control board and having a shelf board, wherein the substrate box accommodates therein a fan; an air intake port is formed on a side surface of the casing; the shelf board has a hollow portion; and the hollow portion serves as an air intake duct which, with an aide of a negative pressure generated in the substrate box by the fan, supplies an external air from the air intake port to the substrate box. 
     With the above structure, the hollow portion of the shelf board functions as an air intake duct. Therefore, it is not necessary to provide an air intake duct separately from the shelf board. This contributes to reduction of the number of components of the radiation mechanism, and makes it possible to form a compact casing. Further, use of the shelf board as an air intake duct allows a simple structure of the radiation mechanism. Further, by forming the shelf board in the casing, throughout the width and the depth of the casing, it is possible to form the air intake port on any one of the four side surfaces of the casing. Further, forming a plurality of air intake ports is also made easy. Therefore, the degree of freedom in regard to the position of forming the air intake port is improved. 
     The present invention may be adapted so that a first hole portion is formed on a top surface of the substrate box, the shelf board is disposed in a position higher than the substrate box, and a second hole portion is formed in a position of an under surface of the shelf board corresponding to a position above the first hole portion of the substrate box. 
     With the above structure, the external air coming through the hollow portion of the shelf board is supplied to the inside of the substrate box, via the first hole portion and the second hole portion. As described, with a simple structure of forming the first hole portion on the top surface of the substrate box, and forming the second hole portion on the under surface of the shelf board, it is possible to communicate the hollow portion of the shelf board with the inside of the substrate box. 
     The present invention is adapted so that the shelf board is made of a metal. 
     In the structure, the shelf board is made of metal. Therefore, it is possible to radiate the heat of the substrate box via the shelf board. It is further possible to ensure a broader radiation area by forming the shelf board in the casing, throughout the width and the depth of the casing. 
     The present invention may be adapted so that the control board has a control unit mounted thereon, and the fan is mounted on the control board and cools down the control unit. 
     In the structure, the fan for cooling the control unit is operated to generate a negative pressure in the substrate box. Due to the negative pressure, the external air is supplied to the substrate box via the air intake port and the air intake duct. This eliminates the need for separately providing a fan, which is advantageous in terms of costs. 
     An aspect of the present invention is a gaming machine comprising a casing accommodating therein a power source box configured to receive power supplied from an external power source and supply the power to machines for games, and a substrate box having therein a control board and having a shelf board, wherein the casing comprises: an air intake duct configured to supply an external air to the substrate box, an exhaust heat chamber in which the external air having passed through the substrate box and an air having passed through the power source box flow, and an exhaust passage through which the external air and the air having flowed into the exhaust heat chamber are discharged. 
     In the above structure, the external air supplied to the substrate box via the air intake duct flows into the exhaust heat chamber through the substrate box, and the air having passed through the power source box flows into the exhaust heat chamber. As should be understood from this, the external air from the substrate box and the air having gone through the power source box flow into a single exhaust heat chamber, and is discharged from a single exhaust passage. Therefore, there is no need for separately providing an exhaust heat chamber and an exhaust passage for the external air from the substrate box and another exhaust heat chamber and another exhaust passage for the air from the power source box, and the number of components of the radiation mechanism is reduced. Thus, a compact casing is possible. 
     The present invention may be adapted so that an exhaust fan is provided to the exhaust passage, and the external air having passed through the substrate box and the air having passed through the power source box is discharged from the exhaust port of the exhaust passage, by operating the exhaust fan. 
     In the above structure, the external air having passed through the substrate box and the air having gone through the power source box are sufficiently discharged by the exhaust fan from the exhaust port at the end of the exhaust passage. 
     The present invention may be adapted so that the substrate box accommodates therein a fan; an air intake port is formed on a side surface of the casing; the shelf board of the casing has a hollow portion; and the hollow portion serves as an air intake duct which, with an aide of a negative pressure generated in the substrate box by the fan, supplies the external air from the air intake port to the substrate box. 
     With the above structure, the hollow portion of the shelf board functions as an air intake duct. Therefore, it is possible to realize a simple structure with a reduced number of components. Further, by forming the shelf board in the casing, throughout the width and the depth of the casing, it is possible to form the air intake port on any one of the four side surfaces of the casing. Further, forming a plurality of air intake ports is also made easy. Therefore, the degree of freedom in regard to the position of forming the air intake port is improved. 
     The present invention may be adapted so that the control board has a control unit mounted thereon, and the fan is mounted on the control board and cools down the control unit. 
     In the structure, the fan for cooling the control unit is operated to generate a negative pressure in the substrate box. Due to the negative pressure, the external air is supplied to the substrate box via the air intake port and the air intake duct. This eliminates the need for separately providing a fan, which is advantageous in terms of costs. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of a slot machine. 
         FIG. 2  is a front view of the slot machine. 
         FIG. 3  is a perspective view of the slot machine. 
         FIG. 4  is an exploded perspective view of the slot machine. 
         FIG. 5  is a perspective view of a topper device. 
         FIG. 6  is a perspective view of the topper device. 
         FIG. 7  is a plan view of the topper device. 
         FIG. 8  is a plan view of the topper device. 
         FIG. 9  is a perspective view of the topper device, with a side plate cover detached. 
         FIG. 10  is an exploded perspective view of the topper device. 
         FIG. 11  is a perspective view of a topper rear cover. 
         FIG. 12  is a perspective view of the topper rear cover. 
         FIG. 13  is an exploded perspective view of the topper display device. 
         FIG. 14  is a perspective view of an upper plate and an under plate. 
         FIG. 15  is a front view of a display plate module. 
         FIG. 16A  is an explanatory diagram showing a state where the display plate module is mounted. 
         FIG. 16B  is an explanatory diagram showing the main part of a state where the display plate module is mounted. 
         FIG. 16C  is an explanatory diagram showing the main part of a state where the display plate module is mounted. 
         FIG. 17  is an explanatory diagram showing a process of exchanging the display plate module. 
         FIG. 18  is an explanatory diagram showing the process of exchanging the display plate module. 
         FIG. 19  is an explanatory diagram showing a state where the display plate module is mounted to a topper pillar base. 
         FIG. 20  is a perspective view of the topper illumination mechanism and a topper front cover. 
         FIG. 21  is a perspective view of light dispersion plate. 
         FIG. 22  is a perspective view of a topper illumination mechanism. 
         FIG. 23  is an exploded perspective view of a topper support mechanism. 
         FIG. 24  is a cross sectional view of the topper support mechanism. 
         FIG. 25  is a perspective view of the topper support mechanism. 
         FIG. 26  is a perspective view of the topper support mechanism. 
         FIG. 27  is a perspective view of the slot machine. 
         FIG. 28  is a perspective view of the slot machine. 
         FIG. 29  is an exploded perspective view of the top device. 
         FIG. 30  is an exploded perspective view of an illumination mechanism. 
         FIG. 31  is an exploded perspective view of an upper display mechanism and a bezel mechanism. 
         FIG. 32  is an exploded perspective view of the top device. 
         FIG. 33  is a perspective view of an upper bracket. 
         FIG. 34  is an exploded perspective view of an upper door device. 
         FIG. 35  is a perspective view of the upper door device. 
         FIG. 36  is a perspective view of the upper door device. 
         FIG. 37  is a perspective view of the upper door device. 
         FIG. 38  is an exploded perspective view of a lower display mechanism. 
         FIG. 39  is a perspective view of a lower illumination mechanism. 
         FIG. 40  is an exploded perspective view of the lower illumination mechanism. 
         FIG. 41  is a perspective view of an upper illumination mechanism. 
         FIG. 42  is an exploded perspective view of the upper illumination mechanism. 
         FIG. 43  is an exploded perspective view of an illumination mechanism. 
         FIG. 44  is a perspective view of a lower door device. 
         FIG. 45  is a perspective view of the lower door device. 
         FIG. 46  is a perspective view of a bill handling mechanism. 
         FIG. 47  is an explanatory diagram showing a state where a power source box is detached. 
         FIG. 48  is a perspective view of a control panel. 
         FIG. 49  is a perspective view of a counter mechanism. 
         FIG. 50  is a perspective view of a bill drop door. 
         FIG. 51  is a perspective view of a bill cover lock mechanism. 
         FIG. 52  is a perspective view of a bill cover lock mechanism. 
         FIG. 53  is a perspective view of a bill stocker case. 
         FIG. 54A  is a perspective view of the bill stocker case. 
         FIG. 54B  is a perspective view of the bill stocker case. 
         FIG. 55  is a perspective view of the slot machine. 
         FIG. 56  is a front view of the slot machine. 
         FIG. 57  is a perspective view of a casing. 
         FIG. 58  is a perspective view of a main part of the slot machine. 
         FIG. 59  is a perspective view of a main part of the slot machine. 
         FIG. 60  is a perspective view of a lower door lock mechanism. 
         FIG. 61  is a perspective view of an upper door lock mechanism. 
         FIG. 62  is a perspective view of a reel device. 
         FIG. 63  is a perspective view of the reel device. 
         FIG. 64  is a perspective view of the slot machine. 
         FIG. 65  is a perspective view of a main body substrate casing. 
         FIG. 66  is a perspective view of the main body substrate casing. 
         FIG. 67  is an explanatory diagram showing an open state of the main body substrate casing. 
         FIG. 68  is a perspective view of a power source cooling mechanism. 
         FIG. 69  is a perspective view of a power source cooling mechanism. 
         FIG. 70  is a perspective view of a fan support member. 
         FIG. 71  is a perspective view of the fan support member. 
         FIG. 72  is a perspective view of a radiation mechanism. 
         FIG. 73  is an explanatory diagram of a shelf board member. 
         FIG. 74A  is an explanatory diagram of a security cage. 
         FIG. 74B  is an explanatory diagram of the security cage. 
         FIG. 74C  is an explanatory diagram of the security cage. 
         FIG. 75  is a perspective view of the shelf board member. 
         FIG. 76  is a perspective view of a main part of the shelf board member. 
         FIG. 77  is a perspective view of the shelf board member. 
         FIG. 78  is an explanatory diagram showing a relation between the shelf board member and the security cage. 
         FIG. 79  is an exploded perspective view of the security cage. 
         FIG. 80  is an explanatory diagram showing a relation between the shelf board member and the security cage. 
         FIG. 81  is an explanatory diagram showing a relation between the shelf board member and the security cage. 
         FIG. 82  is a perspective view of the security cage. 
         FIG. 83  is a perspective view of the security cage. 
         FIG. 84  is a front view of a connector attachment plate. 
         FIG. 85  is a perspective view of a main part of the security cage. 
         FIG. 86  is an explanatory diagram showing a process of mounting a GAL device and an SSD device. 
         FIG. 87  is a perspective view of the SSD mechanism. 
         FIG. 88  is an exploded perspective view of the SSD device. 
         FIG. 89  is an exploded perspective view of the SSD mounting device. 
         FIG. 90  is an explanatory diagram showing a process of mounting the SSD device to the SSD mounting device. 
         FIG. 91A  is a perspective view of an APX motherboard. 
         FIG. 91B  is a plan view of the APX motherboard. 
         FIG. 92  is a perspective view of an AXGMEM substrate and a GAL support plate. 
         FIG. 93  is an exploded perspective view of the GAL device. 
         FIG. 94  is an exploded perspective view of a GAL casing. 
         FIG. 95  is a perspective view of the GAL device. 
         FIG. 96  is a perspective view of an AXGMEM substrate. 
         FIG. 97A  is a block diagram showing a circuit structure of the slot machine. 
         FIG. 97B  is a block diagram showing the circuit structure of the slot machine. 
         FIG. 98  is a block diagram showing a circuit structure of the GAL substrate. 
         FIG. 99  is a block diagram showing a circuit structure of the AXGMEM substrate. 
         FIG. 100  is a block diagram showing the circuit structure of the APX motherboard. 
         FIG. 101  is a block diagram showing a circuit structure of a sub I/O substrate. 
         FIG. 102A  is a block diagram showing a circuit structure of the DPDAMP substrate. 
         FIG. 102B  is a block diagram showing the circuit structure of the DPDAMP substrate. 
         FIG. 103A  is an explanatory diagram showing data arrangement of the SSD substrate. 
         FIG. 103B  is an explanatory diagram showing data arrangement of the SSD substrate. 
         FIG. 104  is an explanatory diagram showing data arrangement of a boot region. 
         FIG. 105  is an explanatory diagram of a first partition region. 
         FIG. 106  is an explanatory diagram of a second partition region. 
         FIG. 107  is an explanatory diagram of a third partition region. 
         FIG. 108  is an explanatory diagram of program authentication. 
         FIG. 109  is an explanatory diagram of the program authentication. 
         FIG. 110A  is a flowchart of a boot sequence. 
         FIG. 110B  is a flowchart of the boot sequence. 
         FIG. 110C  is a flowchart of the boot sequence. 
         FIG. 111  is a flowchart of a game running process. 
         FIG. 112  is a flowchart of a first temperature management process. 
         FIG. 113  is a flowchart of a second temperature management process. 
         FIG. 114  is a perspective view of a topper device. 
         FIG. 115  is an exploded perspective view of the topper device. 
         FIG. 116  is an exploded perspective view of the topper support mechanism. 
         FIG. 117  is a perspective view of the topper support mechanism and the topper display device. 
         FIG. 118  is an exploded perspective view of the topper display device. 
         FIG. 119  is a perspective view of the topper display device. 
         FIG. 120  is a perspective view of the topper support mechanism. 
         FIG. 121  is a perspective view of the topper display device. 
         FIG. 122A  is a side view of the topper display device. 
         FIG. 122B  is a side view of a main part of the topper display device. 
         FIG. 123  is an explanatory diagram showing a state where the topper display device is attached. 
         FIG. 124  is a perspective view of the topper rear cover. 
         FIG. 125  is a perspective view of the topper rear cover, an upper rear illumination member, and a lower rear illumination member. 
         FIG. 126  is a perspective view of the topper rear cover, an upper rear illumination member, and a lower rear illumination member. 
         FIG. 127  is an exploded perspective view of the topper device. 
         FIG. 128  is a perspective view of the topper rear cover. 
         FIG. 129  is an explanatory diagram showing a process of attaching the topper rear cover to an upper front illumination member. 
         FIG. 130  is a perspective view of the topper front cover. 
         FIG. 131  is a perspective view of the topper display device. 
         FIG. 132  is a perspective view of the upper front illumination member and the upper rear illumination member. 
         FIG. 133  is a perspective view of the upper front illumination member. 
         FIG. 134  is a perspective view of the upper front illumination member. 
         FIG. 135  is a cross sectional perspective view of the upper front illumination member. 
         FIG. 136  is a cross sectional perspective view of the upper front illumination member. 
         FIG. 137  is a perspective view of the upper front illumination member. 
         FIG. 138  is a cross sectional perspective view of the upper front illumination member and the upper rear illumination member. 
         FIG. 139A  is a cross sectional perspective view of the upper front illumination member and the upper rear illumination member. 
         FIG. 139B  is an explanatory diagram showing a traveling path of illumination light. 
         FIG. 140  is a perspective view of the upper rear illumination member. 
         FIG. 141  is a perspective view of the upper rear illumination member. 
         FIG. 142  is a cross sectional perspective view of the upper rear illumination member. 
         FIG. 143  is a cross sectional perspective view of the upper rear illumination member. 
         FIG. 144  is a perspective view of the upper rear illumination member. 
         FIG. 145  is an explanatory diagram showing a process of assembling the upper front illumination member and the upper rear illumination member. 
         FIG. 146  is an explanatory diagram showing a process of assembling the upper front illumination member and the upper rear illumination member. 
         FIG. 147  is a functional block diagram of the gaming machine. 
         FIG. 148  is a block diagram of an external controller. 
         FIG. 149  is a schematic structural diagram of the gaming machine. 
         FIG. 150  is a block diagram of a game system. 
         FIG. 151  is a block diagram of a PTS system. 
         FIG. 152  is a block diagram of the PTS system. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Overview of the Invention: Radiation Mechanism and Air Intake Duct Serving Also as Shelf Board 
     First, the following describes an overview of the present invention, regarding an air intake duct serving also as a shelf board, with reference to  FIG. 57 ,  FIG. 73  to  FIG. 74C ,  FIG. 78 , and  FIG. 79 . Invention  1 D is a gaming machine (slot machine  1 ) comprising a casing (casing  411 ) accommodating therein a substrate box (security cage SK shown in  FIG. 73 ,  FIG. 74B ,  FIG. 74C ) having therein a control board (APX motherboard AM shown in  FIG. 74B ) and having a shelf board (shelf board R 21  shown in  FIG. 57  and  FIG. 73 ), wherein the substrate box accommodates therein a fan (CPU cooling fan CF shown in  FIG. 74B ,  FIG. 74C ); an air intake port (air hole  411   i , air intake hole  411   e  shown in  FIG. 73 ) is formed on a side surface of the casing (casing  411 ); the shelf board has a hollow portion; and the hollow portion serves as an air intake duct which, with an aide of a negative pressure generated in the substrate box by the fan, supplies an external air from the air intake port to the substrate box. As shown in  FIG. 78 , in the present embodiment. The shelf board R 21  has a top surface member R 211  in a flat plate form having a rib extended from the front edge to the rear edge thereof, and an under surface member R 212  in a flat plate form having a rib extended from the front edge to the rear edge thereof. Combining the top surface member R 211  and the under surface member R 212  forms a space therebetween, and thus the shelf board R 21  is made hollow. It however goes without saying that any structure is adoptable as long as the shelf board is made hollow, and the shelf board does not necessarily have to be formed by a plurality of components as in the present embodiment. Further, it is possible to structure the shelf board using three or more parts. Further, it should be noted that, although the present embodiment deals with a case where the positions of the air intake ports are on the right and left side surfaces of the casing, the air intake ports may be provided on the front and back side surfaces of the casing. Note further that the fan does not necessarily have to be the one for cooling the CPU, and may be provided separately from the CPU cooling fan CF shown in  FIG. 74B  and  FIG. 74C . 
     With the above structure, the hollow portion of the shelf board functions as an air intake duct. Therefore, it is not necessary to provide an air intake duct separately from the shelf board. This contributes to reduction of the number of components, and makes it possible to form a compact casing. Further, use of the shelf board as an air intake duct allows a simple structure of the radiation mechanism. Further, in the present embodiment, by forming the shelf board R 21  in the casing  411 , throughout the width and the depth of the casing  411 , it is possible to form the air intake port on any one of the four side surfaces of the casing. Further, forming a plurality of air intake ports is also made easy. Therefore, the degree of freedom in regard to the position of forming the air intake port is improved. 
     Further, in Invention  2 D, as shown in  FIG. 73  and  FIG. 78 , a first hole portion (an opening SK 1   a  shown in  FIG. 78 ) on a top surface (top wall member SK 1  shown in  FIG. 78 ) of the substrate box (the security cage SK shown in  FIG. 73 ,  FIG. 74B , and  FIG. 74C ). The shelf board (shelf board R 21  shown in  FIG. 57  and  FIG. 73 ) is disposed in a position higher than the substrate box, and a second hole portion (the air passage hole R 212   a  shown in  FIG. 78 ) is formed in a position of an under surface (the under surface member R 212  shown in  FIG. 78 ) of the shelf board corresponding to a position above the first hole portion of the substrate box. Note that, in the present embodiment, the opening SK 1   a  of the security cage SK is formed slightly on the left side from the middle of the top wall member SK 1 . The air passage hole R 212   a  is formed slightly on the left side from the middle of the under surface member R 212 . However, the positions of forming these are not limited to this. For example, the opening SK 1   a  and the air passage hole R 212   a  of the security cage SK may be formed in any given positions, provided that their positions coincide with each other. 
     With the above structure, the external air coming through the hollow portion of the shelf board is supplied to the inside of the substrate box, via the first hole portion and the second hole portion. As described, with a simple structure of forming the first hole portion on the top surface of the substrate box, and forming the second hole portion on the under surface of the shelf board, it is possible to communicate the hollow portion of the shelf board with the inside of the substrate box. 
     The invention  3 D is adapted so that the shelf board (shelf board R 21  of  FIG. 57  and  FIG. 73 ) is made of a metal. 
     In the structure, the shelf board is made of metal. Therefore, it is possible to radiate the heat of the substrate box via the shelf board. Further, as shown in  FIG. 73  and  FIG. 78 , in the present embodiment, it is further possible to ensure a broader radiation area by forming the shelf board R 21  in the casing  411 , throughout the width and the depth (left/right and front/back) of the casing  411 . 
     In the invention  4 D, the control board (APX motherboard AM shown in  FIG. 74B ) has a control unit (not-shown CPU), and the fan (the CPU cooling fan CF shown in  FIG. 74B  and  FIG. 74C ) is configured to cool the control unit and may not be mounted on the control board. 
     In the structure, the fan for cooling the control unit is operated to generate a negative pressure in the substrate box. Due to the negative pressure, the external air is supplied to the substrate box via the air intake port and the air intake duct. This eliminates the need for separately providing a fan, which is advantageous in terms of costs. 
     Next, the following describes an overview of the present invention, regarding a radiation mechanism, with reference to  FIG. 28 ,  FIG. 57 ,  FIG. 68  to  FIG. 74C , and  FIG. 78 , and  FIG. 79 . The invention  5 D is a gaming machine comprising a casing (casing  411 ) accommodating therein a power source box (the power source box  7 R 11  shown in  FIG. 68 ) configured to receive power supplied from an external power source and supply the power to machines for games, and a substrate box (the security cage SK shown in  FIG. 73 ,  FIG. 74B , and  FIG. 74C ) having therein a control board (the APX motherboard AM shown in  FIG. 74B ) and having a shelf board, wherein the casing includes: an air intake duct (shelf board R 21  shown in  FIG. 57  and  FIG. 73 ) configured to supply an external air to the substrate box, and an exhaust heat chamber (exhaust heat chamber R 152  shown in  FIG. 72 ) in which the external air having passed through the substrate box and an air having passed through the power source box flow, and an exhaust passage (the exhaust fan R 12  shown in  FIG. 72  and the air hole  411   j  shown in  FIG. 28  and  FIG. 68 ) through which the external air and the air having flowed into the exhaust heat chamber are discharged. It should be noted that, in the present embodiment, the air intake duct is a hollow shelf board R 21 ; however, the air intake duct may be provided separately from the shelf board R 21 . 
     In the above structure, the external air supplied to the substrate box via the air intake duct flows into the exhaust heat chamber through the substrate box, and the air having passed through the power source box flows into the exhaust heat chamber. As should be understood from this, the external air from the substrate box and the air having gone through the power source box flow into a single exhaust heat chamber, and is discharged from the exhaust passage. Therefore, there is no need for separately providing an exhaust heat chamber and an exhaust passage for the external air from the substrate box and another exhaust heat chamber and another exhaust passage for the air from the power source box, and the number of components of the radiation mechanism is reduced. Thus, a compact casing is possible. 
     The invention  6 D may be adapted so that an exhaust fan (the exhaust fan R 12  shown in  FIG. 72 ) is provided to the exhaust passage, and the external air having passed through the substrate box and the air having passed through the power source box is discharged from the exhaust port (the air hole  411   j  shown in  FIG. 28  and  FIG. 68 ) of the exhaust passage, by operating the exhaust fan. 
     In the above structure, the external air having passed through the substrate box and the air having gone through the power source box are sufficiently discharged by the exhaust fan from the exhaust port at the end of the exhaust passage. 
     The invention  7 D is such that the substrate box (the security cage SK shown in  FIG. 73 ,  FIG. 74B , and  FIG. 74C ) accommodates therein a fan (CPU cooling fan CF shown in  FIG. 74B ,  FIG. 74C ); an air intake port (air hole  411   i , air intake hole  411   e  shown in  FIG. 73 ) is formed on a side surface of the casing (casing  411 ); the shelf board of the casing has a hollow portion; and the hollow portion serves as an air intake duct which, with an aide of a negative pressure generated in the substrate box by the fan, supplies the external air from the air intake port to the substrate box. Note further that the fan does not necessarily have to be the one for cooling the CPU, and may be provided separately from the CPU cooling fan CF shown in  FIG. 74B  and  FIG. 74C . 
     With the above structure, the hollow portion of the shelf board functions as an air intake duct. Therefore, it is possible to realize a simple structure with a reduced number of components. Further, by forming the shelf board in the casing, throughout the width and the depth of the casing, it is possible to form the air intake port on any one of the four side surfaces of the casing. Further, forming a plurality of air intake ports is also made easy. Therefore, the degree of freedom in regard to the position of forming the air intake port is improved. 
     In the invention  8 D, the control board (APX motherboard AM shown in  FIG. 74B ) has a control unit (not-shown CPU), and 
     the fan (the CPU cooling fan CF shown in  FIG. 74B  and  FIG. 74C ) is configured to cool the control unit and may not be mounted on the control board. 
     In the structure, the fan for cooling the control unit is operated to generate a negative pressure in the substrate box. Due to the negative pressure, the external air is supplied to the substrate box via the air intake port and the air intake duct. This eliminates the need for separately providing a fan, which is advantageous in terms of costs. 
     Embodiment 1 
     The following describes a gaming machine of the present invention with reference to attached drawings. Note that Embodiment 1 deals with a case where the gaming machine is a single slot machine  1 . 
     (Overall Structure of Slot Machine  1 ) 
     As shown in  FIG. 1  and  FIG. 4 , the slot machine  1  serving as the gaming machine includes: a topper device  2 , and a gaming machine main body  5  having the topper device  2  on its top wall. The gaming machine main body  5  includes: a top device  3  having a liquid crystal display device  3221 , and a device main body  4  having the top device  3  on its top wall. The topper device  2  makes the slot machine  1  noticeable from a distant position, while enabling the game on the slot machine  1  visible from the distant position. The top device  3  is configured to display game-related information such as specific content of the game, a payout table, and rules. The device main body  4  has a function of running a game. 
     In the description below, a side (direction) from the slot machine  1  towards a player is referred to as the front side (forward direction) of the slot machine  1 . The opposite to the front side is referred to as back side (backward direction, depth direction). The player&#39;s left and right sides are referred to as the right side (rightward) and the left side (leftward) of the slot machine  1 , respectively. Further, the directions towards the front side and the back sides are collectively referred to as forward/backward direction or thickness direction. The directions towards the left side and the right sides are collectively referred to as left/right direction or width direction. Further, directions perpendicular to the forward/backward direction (thickness direction) and the left/right direction (width direction) are collectively referred as vertical direction or height direction. 
     (Outline of Topper Device  2 ) 
     The topper device  2  is provided on the top wall of the top device  3  so as to be in the highest position of the slot machine  1 . The topper device  2  has a rotation axis corresponding to the vertical direction of the slot machine  1 , and is capable of rotating, within a predetermined angle range, in the normal direction and the reverse direction about this rotation axis. This way, the topper device  2  is capable of switching its posture between a front-facing posture in which the display surface  2   a  displaying the game content faces the front side and a tilted posture in which the display surface  2   a  faces diagonally front side (see  FIG. 2  and  FIG. 3 ). The front-facing posture is a posture adopted in a normal state, such as when the game is running or during the standby state. This is for enabling a person (players, gaming facility staff, and the like) far apart from the slot machine  1  to visually confirm the game content. The tilted posture on the other hand is a posture adopted when displayed content of the topper device  2  is changed. As shown in  FIG. 2  and  FIG. 3 , when taking the tilted posture, a side plate cover  216  (replacement mechanism) disposed at the right side end portion of the topper device  2  is positioned on the front side. This enables changing of the displayed content of the topper device  2  from the front side of the slot machine  1 . 
     (Detailed Structure of Topper Device  2 ) 
     As shown in  FIG. 5  and  FIG. 6 , the topper device  2  has a topper main body  21  having the display surface  2   a , and a tower member  22  provided on the top wall of the topper main body  21 . The tower member  22  has a cylindrical cover made of a transparent resin, and has therein a light emitting device such as LED. At the uppermost part of the slot machine  1 , the tower member  22  lights in a single color or in a plurality of colors, thereby improving the visibility of the slot machine  1  from a distant position. 
     The topper main body  21  is provided to the top device  3  in such a manner that the posture of the topper main body  21  is switched between the front-facing posture shown in  FIG. 7  and the tilted posture shown in  FIG. 8 . As shown in  FIG. 10 , the topper main body  21  includes: a topper display device  211 , a topper pillar base  212  which accommodates and holds the topper display device  211  from its back side, a side plate cover  216  (replacement mechanism) detachably provided to the right end portion of the topper pillar base  212 , a topper illumination mechanism  213  disposed on the front side of the topper display device  211 , a topper front cover  214  disposed on the front side of the topper illumination mechanism  213 , and a topper support mechanism  215  rotatably supports the topper device  2  so that the topper device  2  is capable of rotating, within a predetermined angle range, in a horizontal direction with respect to the top device  3 . 
     (Detailed Structure of Topper Device  2 : Topper Pillar Base  212 ) 
     As shown in  FIG. 11 , the topper pillar base  212  has a housing frame member  2121  whose front surface is in a rectangular shape, and a rim portion  2122  protruding from the peripheral edge of the housing frame member  2121  towards the front side. To the housing frame member  2121  of the topper pillar base  212  are arranged a backlight unit  23  such as a cold cathode tube and a fluorescent tube, and the like. The housing frame member  2121  has a plurality of ventilation holes  2121   a , as shown in  FIG. 12 . The ventilation holes  2121   a  are formed on the upper portion, the left portion, and the right portion of the housing frame member  2121 . Through these holes, the air inside the topper device  2  heated by the backlight unit  23  flows out, while the outside air flows inside the topper device  2 . This way, cooling of the topper device  2  is made possible. 
     Further, the topper pillar base  212  has a recess portion  2122   a  which is a notched portion in the upper middle portion of the rim portion  2121   b . As shown in  FIG. 7 , to the recess portion  2122   a  is fit an upper bracket  217 . The front end portion of the upper bracket  217  is provided at the topper illumination mechanism  213  shown in  FIG. 8 . On the top surface of the upper bracket  217  is provided a tower member  22 . As shown in  FIG. 11  and  FIG. 12 , the topper pillar base  212  has an opening  2121   b  at the right side portion of the housing frame member  2121 . The opening  2121   b  allows access of a worker to the topper display device  211  shown in  FIG. 10 . 
     As shown in  FIG. 6 , the opening  2121   b  is covered by the side plate cover  216 . The side plate cover  216  is attachable and detachable to and from the topper pillar base  212 , and as shown in  FIG. 8  and  FIG. 9 , is detached at a time of changing the displayed content of the topper device  2 . 
     The topper pillar base  212  has a topper support unit  2123  in the lower middle portion. The topper support unit  2123  constitutes a part of a topper support mechanism  215 . The topper support mechanism  215  is detailed later. 
     (Detailed Structure of Topper Device  2 : Topper Display Device  211 ) 
     As shown in  FIG. 10 , the topper pillar base  212  with the structure described above accommodates the topper display device  211  at a position in front of the backlight unit  23 . As shown in  FIG. 13 , the topper display device  211  includes: a TP light guide base  2111  fixed to the topper pillar base  212 , and a display plate module  2117  disposed on the front surface of the TP light guide base  2111 . The TP light guide base  2111  is made of a transparent resin, and is capable of letting pass light from the backlight unit  23  disposed behind the TP light guide base  2111 . The TP light guide base  2111  includes: a front surface portion  2111   a  having a rectangular shape when viewed from the front side, a fastening portion  2111   b  formed at the right-end middle portion of the front surface portion  2111   a , an upper side attachment portion  2111   c  protruding upward from the upper side of the front surface portion  2111   a , a lower side attachment portion  2111   d  protruding downward from the lower side of the front surface portion  2111   a , a first abutting portion  2111   e  protruding forward from the left-side middle portion of the front surface portion  2111   a , a second abutting portion  2111   f  protruding upward from the upper end on the left-side of the front surface portion  2111   a , and a third abutting portion  2111   g  protruding downward from the lower end on the left-side of the front surface portion  2111   a.    
     The fastening portion  2111   b  makes the side plate cover  216  attachable and detachable. A grip portion  2111   b , the side plate cover  216 , and the opening  2121   b  structure the replacement mechanism. To the upper side attachment portion  2111   c  of the TP light guide base  2111  is provided an upper side plate holder  2112 . The upper side plate holder  2112  is positioned relative to the left/right direction by having its left end abutting the second abutting portion  2111   f . The upper side plate holder  2112  includes: a planar portion  2112   c  horizontally disposed along the upper side of the TP light guide base  2111 , attachment portions  2112   a  disposed on the left side portion and the right side portion at the back side of the planar portion  2112   c , and a holding portion  2112   b  disposed on the front side of the planar portion  2112   c . The attachment portions  2112   a  are each extended upward from the planar portion  2112   c , and are fixed to the upper side attachment portion  2111   c  of the TP light guide base  2111 . On the other hand, the holding portion  2112   b  is bent downward from the planar portion  2112   c , and is capable of holding the upper side of the display plate module  2117 . 
     To the lower side attachment portion  2111   d  of the TP light guide base  2111  is provided a lower side plate holder  2113 . The lower side plate holder  2113  is positioned relative to the left/right direction by having its left end abutting the third abutting portion  2111   g . As shown in  FIG. 15 , the lower side plate holder  2113  has a planer portion  2113   c , attachment portions  2113   a , and a holding portion  2113   b , as in the case of the upper side plate holder  2112 . The attachment portions  2113   a  are each bent downward from the planer portion  2113   c , and are fixed to the lower side attachment portion  2111   d  of the TP light guide base  2111 . On the other hand, the holding portion  2113   b  is extended upward from the planar portion  2113   c , and is capable of holding the lower side of the display plate module  2117 . 
     As shown in  FIG. 13 , between the upper side plate holder  2112  and the TP light guide base  2111  is disposed an upper plate  2114 . The upper plate  2114  is positioned relative to the left/right direction by having its left end abutting the second abutting portion  2111   f . On the other hand, between the lower side plate holder  2113  and the TP light guide base  2111  is disposed a under plate  2115 . The under plate  2115  is positioned relative to the left/right direction by having its left end abutting the third abutting portion  2111   g.    
     As shown in  FIG. 14 , the upper plate  2114  includes: a planar portion  2114   a  horizontally disposed, a first abutting portion  2114   b  extending downward from the right side of the planar portion  2114   a , a second abutting portion  2114   c  extending downward from the front side of the planar portion  2114   a , and a third abutting portion  2114   d  disposed on the right end portion. The second abutting portion  2114   c  is formed so that the width at its right end portion is made wider downward than the other portions. The third abutting portion  2114   d  is extending forward from the right end portion of the second abutting portion  2114   c.    
     The under plate  2115  has: a planer portion  2115   a  horizontally disposed, a first abutting portion  2115   b  extending upward from the right side of the planer portion  2115   a , a second abutting portion  2115   c  extending upward from the front side of the planer portion  2115   a , and a third abutting portion  2115   d  disposed on the right end portion. The second abutting portion  2115   c  is formed so that the width at its right end portion is made wider upward than the other portions. The third abutting portion  2115   d  is extended forward from the right end portion of the second abutting portion  2115   c.    
     (Detailed Structure of Topper Device  2 : Topper Display Device  211 : Display Plate Module  2117 ) 
     As shown in  FIG. 13 , the upper side plate holder  2112  and the upper plate  2114 , the lower side plate holder  2113  and the under plate  2115  are symmetrically arranged to the top and bottom with respect to the TP light guide base  2111 , so as to hold the display plate module  2117  in positions relative to the vertical direction and in the forward/backward direction. Further, the display plate module  2117  abuts the first abutting portion  2111   e  of the TP light guide base  2111 , so that the first abutting portion  2111   e  restricts leftward movements. 
     The display plate module  2117  includes a light guiding plate  21171 , a first base plate  21172 , a design plate  21173 , and a second base plate  21174 . The light guiding plate  21171  has a function of emitting light forward, from its front side. The first base plate  21172  and the second base plate  21174  are made of a transparent material and are formed into the same rectangular shape of the same size. The design plate  21173  has an image suggestive of the game of the slot machine  1 . 
     The light guiding plate  21171  is attached to the front surface portion  2111   a  of the TP light guide base  2111 . On the front side of the light guiding plate  21171  is arranged the first base plate  21172 . As shown in  FIG. 16A ,  FIG. 16B , and  FIG. 16C , the first base plate  21172  has its upper side portion and its lower side portion abutting the second abutting portion  2114   c  and the second abutting portion  2115   c  of the upper plate  2114  and the under plate  2115 , respectively. Further, the first base plate  21172  has its left side upper end portion abut the third abutting portion  2114   d  of the upper plate  2114 , and has its left side lower end portion abut the third abutting portion  2115   d  of the under plate  2115 . This way, the first base plate  21172  is fixed its position relative to the left/right direction by the first abutting portion  2111   e  of the TP light guide base  2111  and the third abutting portion  2114   d  and the third abutting portion  2115   d  of the upper plate  2114  and the under plate  2115 . 
     The thickness of the first base plate  21172  is the same as the protruding length of the third abutting portion  2114   d  and the third abutting portion  2115   d  of the upper plate  2114  and the under plate  2115 . In front of the first base plate  21172  are sequentially disposed the design plate  21173  and the second base plate  21174  in this order. In other words, the design plate  21173  is sandwiched between the first base plate  21172  and the second base plate  21174 . This way, the illumination light from the light guiding plate  21171  makes the image on the design plate  21173  visible from outside via the second base plate  21174 . 
     The design plate  21173  abuts the first base plate  21172  and the second base plate  21174  and is capable of moving. With the rightward movement of the first base plate  21172  being restricted by the third abutting portion  2114   d  and third abutting portion  2115   d , the design plate  21173  and the second base plate  21174  are moveable in the left/right direction in the right side area of the abutting position of the first abutting portion  2111   e.    
     To the right side of the design plate  21173  is an overhang portion  21173   a . The overhang portion  21173   a  protrudes to the right side beyond the second base plate  21174 . Thus, as shown in  FIG. 16  and  FIG. 17 , it is possible to detach or attach only the design plate  21173  from and to the topper display device  211 , by using one hand to hold the second base plate  21174  at the forefront position of the display plate module  2117 , while using the other hand to hold the overhang portion  21173   a  and move the same in the left/right direction. 
     The display plate module  2117  with the structure described above is attached to the front surface (inside surface) of the topper pillar base  212 , as shown in  FIG. 19 . Further, the display plate module  2117  shown in  FIG. 19  is exposed to the outside at the opening  2121   b  of the topper pillar base  212 . Therefore, simply by detaching the side plate cover  216 , it is possible to replace only the design plate  21173  of the display plate module  2117  from the opening  2121   b . It should be noted that the topper display device  211  may be a display device such as a liquid crystal display device. 
     (Detailed Structure of Topper Device  2 : Topper Illumination Mechanism  213 ) 
     As shown in  FIG. 10 , in front of the topper display device  211  are sequentially disposed the topper illumination mechanism  213  and the topper front cover  214  in this order. As shown in  FIG. 20 , the topper illumination mechanism  213  has a topper illumination base  2131 . The topper illumination base  2131  is formed in a rectangular shape, and has an open window  213   a  through which the topper display device  211  is shown to the front. In the upper side middle portion of the topper illumination base  2131  is provided the above mentioned upper bracket  217 . On the front surface of each corner portion of the topper illumination base  2131  is a corner lens  2132  made of a transparent synthetic resin such as acrylic resin. 
     On the front surfaces of the upper side portion and the lower side portions of the topper illumination base  2131  is a light dispersion plate  2135  made of a transparent synthetic resin such as acrylic resin. There are two light dispersion plates  2135  horizontally aligned in series. On the front surfaces of the left side portion and the right side portion of the topper illumination base  2131  is a single light dispersion plate  2135  made provided in the vertical direction. As shown in  FIG. 21 , the light dispersion plate  2135  includes: a reflection unit main body  2135   a ; a corrugated portion  2135   b  formed throughout the entire front end portion of the reflection unit main body  2135   a ; fastening portions  2135   c  formed on the right side portion and the left side portion of the rear end portion of the reflection unit main body  2135   a.    
     As shown in  FIG. 22 , on the back surface of each corner portion of the topper illumination base  2131  is a corner light source member  2133 . The light source member  2133  has a plurality of color LEDs. The light source member  2133  emits effect light of various colors to the corner lens  2132  through the through hole of the topper illumination base  2131 , thereby causing the corner lens  2132  to shed the effect light. 
     On the back surfaces of the upper side portion and the lower side portions of the topper illumination base  2131  is serially aligned two line light source member  2134 . On the back surfaces of the left side portion and the right side portion of the topper illumination base  2131  is a single line light source member  2134 . Each of the line light source member  2134  has a plurality of color LEDs linearly aligned at equal intervals. Each of the line light source member  2134  emits effect light of various colors to the light dispersion plate  2135  through the through hole of the topper illumination base  2131 , thereby causing the effect light to be dispersed from the corrugated portion  2135   b  of the light dispersion plate  2135 . 
     (Detailed Structure of Topper Device  2 : Topper Front Cover  214 ) 
     As shown in  FIG. 20 , on the front side of the topper illumination mechanism  213  is the topper front cover  214 . The topper front cover  214  is formed in a rectangular shape. The topper front cover  214  includes: a corner window  214   a  through which the central portion of the corner lens  2132  is shown to the front; and a linear window  214   b  through which the corrugated portion  2135   b  of the light dispersion plate  2135  is shown to the front. 
     (Detailed Structure of Topper Device  2 : Topper Support Mechanism  215 ) 
     Below the topper illumination mechanism  213  is the topper support mechanism  215 . As shown in  FIG. 23 , the topper support mechanism  215  includes: a TP support cover  2151 ; a TP support  2152 ; a TP support guide plate  2153 ; a TP support hinge pin  2154  shown in  FIG. 24 ; and the topper support unit  2123  of the topper pillar base  212 . The TP support hinge pin  2154  is disposed so as to serve as the rotational axis of the topper support mechanism  215 . 
     The left side portion and the right side portion of the TP support cover  2151  is extended backward. The topper support unit  2123  has a back side cover unit  2123   a  extended downward from the lower side middle portion of the rim portion  2122 . The back side cover unit  2123   a  is formed in a semicircular cylindrical shape whose front side is open, and engagement portions  2123 C are symmetrically arranged to left and right sides at the lower end portion of the both open ends. 
     As shown in  FIG. 25 , in the middle portion of the back side cover unit  2123   a  is a through hole  2123   d  for fastening a screw to join the TP support  2152  to the topper support unit  2123 . Further, at the lower end portion of the back side cover unit  2123   a  is a curved support unit  2123   b . In the support unit  2123   b , the lower end portion of the back side cover unit  2123   a  extends in radially outward directions. The support unit  2123   b  is placed on support plate portions  21524  and  21525  of the TP support  2152 . The support unit  2123   b  has a recess at the middle portion of a part of its top surface, and has a slide portion  2123   e  corresponding to the low surface of the recess, and a first slide restriction portion  2123   f  and a second slide restriction portion  2123   g  corresponding to the high surfaces of the recessed portion. In other words, the support unit  2123   b  has the slide portion  2123   e , and the first slide restriction portion  2123   f  and the second slide restriction portion  2123   g  at the both ends of the slide portion  2123   e  whose high surfaces are leveled higher than the slide portion  2123   e.    
     As shown in  FIG. 24 , the slide portion  2123   e  is covered by the TP support guide plate  2153 . The TP support guide plate  2153  has an abutting portion  2153   a  movably contacting the high surfaces of the slide portion  2123   e , and a fixed portion  2153   b  fixed to the top wall of the top device  3 . The length of the abutting portion  2153   a  is shorter than that of the slide portion  2123   e  relative to the curving direction. Thus, the rotational angle range of the topper support unit  2123  about the TP support hinge pin  2154  covers a range in which the slide portion  2123   e  slides in contact with the abutting portion  2153   a  of the TP support guide plate  2153 , and the first slide restriction portion  2123   f  or the second slide restriction portion  2123   g  abuts an end portion of the abutting portion  2153   a . The relation between the first slide restriction portion  2123   f  and the second slide restriction portion  2123   g  is set so that the topper main body  21  is rotatable in the normal direction and the reverse direction, within a range of an angle at which the first slide restriction portion  2123   f  abuts one of the end portion of the abutting portion  2153   a  and the topper main body  21  takes the tilted posture as shown in  FIG. 8  to another angle at which the second slide restriction portion  2123   g  abuts the other end portion of the abutting portion  2153   a  and the topper main body  21  takes the front-facing posture as shown in  FIG. 7 . 
     As shown in  FIG. 26 , inside the topper support unit  2123  is a TP support  2152 . As shown in  FIG. 23 , the TP support  2152  includes: a main unit  21521  having a box-like shape; a fixed portion  21522  extended upward from the front side of the upper wall of the main unit  21521 ; protrusions  21523  protruding, in the left/right directions, from the lower portion of the left side wall and the right side wall of the main unit  21521 , respectively; support plate portion  21524  and  21525  formed by the lower ends lower end portions of the left side wall and the right side wall of the main unit  21521  respectively extended in the left/right directions; and a first through hole  21521   a  formed at the center of the back side wall of the main unit  21521 . 
     As shown in  FIG. 24 , the TP support  2152  has a second through hole  21521   b  at the central portion of its lower side wall. The second through hole  21521   b  is positioned to the through hole  311   a  formed on the upper wall of the top device  3 , and the TP support hinge pin  2154  is rotatably inserted therein. This enables the TP support  2152  to rotate along the top surface of the top device  3 , about the TP support hinge pin  2154 . 
     As shown in  FIG. 26 , the fixed portion  21522  is fixed to the lower side portion of the topper illumination base  2131  and to the lower side attachment portion  2111   d  of the TP light guide base  2111 . The protrusions  21523  are engaged with engagement portions  2123 C of the topper support unit  2123 , respectively. The protrusions  21523  are also screw-fastened to the left side portion and the right side portion of the TP support cover  2151 . The first through hole  21521   a  is positioned to the through hole  2123   d  shown in  FIG. 25 , and is screw-fastened to the topper support unit  2123 . This way, the topper support unit  2123 , the TP support  2152 , and the TP support cover  2151  are integrated into one piece. 
     The support plate portions  21524  and  21525  are placed on the top surface of the top device  3 . The support plate portion  21524  on the left side has its end portion on the side of the TP support guide plate  2153  extended upward so that the end portion is able to abut the end portion of the TP support guide plate  2153 . Further, each of the support plate portions  21524  and  21525  can be fastened to the top device  3  with use of screws  21526   a  and  21526   b , during a state of taking the front-facing posture. This enables and disables rotation of the TP support  2152 , simply by fastening or unfastening the screws at two positions in relation to the top device  3 . 
     As should be understood from the above, the topper support mechanism  215  is configured so that the topper main body  21  is positioned to the front-facing posture, by having the abutting portion  2153   a  of the TP support guide plate  2153  abut the second slide restriction portion  2123   g  of the topper support unit  2123 , as shown in  FIG. 7 . Further, using the screws  21526   a  and  21526   b  to fix the support plate portion  21524  and  21525  to the upper wall of the top device  3 , during the topper main body  21  takes the front-facing posture, allows the topper main body  21  to maintain the front-facing posture. 
     As shown in  FIG. 8 , the topper support mechanism  215  is configured so that the topper main body  21  is able to change its posture from the front-facing posture to the tilted posture by unfastening the screws  21526   a  and  21526   b  to enable the rotation. Further, as shown in  FIG. 9 , the right side of the topper main body  21  is positioned on the front side while it takes the tilted posture. This is advantageous in that a worker is able to replace the design plate  21173  while he/she is standing in front of the slot machine  1 . 
     Specifically, the worker detaches the side plate cover  216  and opens the opening  2121   b  of the topper pillar base  212  to expose the display plate module  2117  to the outside. After that, as shown in  FIG. 17  and  FIG. 18 , by holding the overhang portion  21173   a  of the design plate  21173  and pulling the same to the right side, the design plate  21173  is taken out from the topper main body  21 . Then, replacement of the design plate  21173  is completed after inserting a replacement design plate  21173  into the display plate module  2117 . Thus, the display of the topper device  2  is easily changed even when a plurality of slot machines  1  are aligned adjacent to each other in the width direction, or when there is an obstacle such as a wall in the width direction of the slot machine  1 . 
     (Top Device  3 : Top Box  31 ) 
     The topper device  2  with the structure detailed above is provided on the top surface of the top device  3 , as shown in  FIG. 4 . The top device  3  includes a top box  31  and an upper display device  32  provided to the front surface of the top box  31 . The front surface and the under surface of the top box  31  is opened. Further, as shown in  FIG. 27  and  FIG. 28 , on the upper wall of the top box  31  is an attachment member  311  having a through hole  311   a . With the TP support hinge pin  2154  shown in  FIG. 24  being inserted into the through hole  311   a , the attachment member  311  rotatably supports the topper device  2  shown in  FIG. 4  in a horizontal direction. Further, on the right side wall of the top box  31  is formed a ventilation hole  31   b.    
     (Top Device  3 : Upper Display Device  32 : Illumination Mechanism  324 ) 
     As shown in  FIG. 29 , the upper display device  32  includes: an upper display mechanism  322 , a bezel mechanism  323 , and an illumination mechanism  324 . As shown in  FIG. 30 , the illumination mechanism  324  includes: a left side illumination module  3241  disposed on the left side, a right side illumination module  3242  disposed on the right side, and an upper side illumination module  3243  disposed on the upper side. 
     The left side illumination module  3241  includes: an L-shaped bracket  32411 , an LED panel  32412  provided on the back surface of the L-shaped bracket  32411 , a diffusing plate  32413  provided on the front surface of the L-shaped bracket  32411 , a casing frame member  32414  disposed in front of the diffusing plate  32413 , and a cover member  32415  disposed in front of the casing frame member  32414 . 
     The L-shaped bracket  32411  includes a linear portion which extends in the vertical direction from the upper end portion to the lower end portion and a bent portion which extends rightward from the upper end portion, and has a plurality of through holes  32411   a  which are linearly lined up at regular intervals at the linear portion. The LED panel  32412  has a plurality of LEDs  32412   a . These LEDs  32412   a  are disposed so as to correspond to the through holes  32411   a , and emits light forward through the through holes  32411   a . The diffusing plate  32413  is formed and disposed so as to cover all the through holes  32411   a . The diffusing plate  32413  is made of a transparent synthetic resin such as acrylic resin. Further, the front surface and the left surface of the diffusing plate  32413  is corrugated from its one end to the other end relative to its length. With this structure, the diffusing plate  32413  diffuses light from the LEDs  32412   a  linearly incident on the back surface, at its front surface and left surface and emits light as diffused light. 
     The diffusing plate  32413  is accommodated in the casing frame member  32414 . The casing frame member  32414  has the through holes  32414   a . The through holes  32414   a  are formed so as to leave the front surface and the both side surfaces of the diffusing plate  32413  uncovered. The casing frame member  32414  is covered by the transparent cover member  32415 . Thus, the left side illumination module  3241  is configured to illuminate mostly the front side and the left side of the top device  3 . 
     On the other hand, the right side illumination module  3242  is formed by members that are left-right symmetrical to the members constituting the left side illumination module  3241 . Specifically, the right side illumination module  3242  includes: an L-shaped bracket  32421 , an LED panel  32422  provided on the back surface of the L-shaped bracket  32421 , a diffusing plate  32423  provided on the front surface of the L-shaped bracket  32421 , a casing frame member  32424  disposed in front of the diffusing plate  32423 , and a cover member  32425  disposed in front of the casing frame member  32424 . 
     The L-shaped bracket  32421  includes a linear portion which extends in the vertical direction from the upper end portion to the lower end portion and a bent portion which extends leftward from the upper end portion, and in the linear portion a plurality of through holes  32421   a  are linearly lined up at regular intervals. The LED panel  32422  has a plurality of LEDs  32422   a . These LEDs  32422   a  are disposed so as to correspond to the through holes  32421   a , and emits light forward through the through holes  32421   a . The diffusing plate  32423  is formed and disposed so as to cover all the through holes  32421   a . The diffusing plate  32423  is made of a transparent synthetic resin such as acrylic resin. Further, the front surface and the right surface of the diffusing plate  32423  is corrugated from its one end to the other end relative to its length. With this structure, the diffusing plate  32423  diffuses light from the LEDs  32422   a  linearly incident on the back surface, at its front surface and right surface and emits light as diffused light. 
     The diffusing plate  32423  is accommodated in the casing frame member  32424 . The casing frame member  32424  has the through holes  32424   a . The through holes  32424   a  are formed so as to leave the front surface and the both side surfaces of the diffusing plate  32423  uncovered. The casing frame member  32424  is covered by the transparent cover member  32425 . Thus, the right side illumination module  3242  is configured to illuminate mostly the front side and the right side of the top device  3 . 
     The upper side illumination module  3243  includes: an I-shaped bracket  32431 , an LED panel  32432  provided on the back surface of the I-shaped bracket  32431 , a diffusing plate  32433  provided on the front surface of the I-shaped bracket  32431 , a casing frame member  32434  disposed in front of the diffusing plate  32433 , and a cover member  32435  disposed in front of the casing frame member  32434 . 
     The I-shaped bracket  32431  has a linear portion arranged in the horizontal direction, and has a plurality of through holes  32431   a  linearly at equal intervals on the linear portion. The LED panel  32432  has a plurality of LEDs  32432   a . These LEDs  32432   a  are disposed so as to correspond to the through holes  32431   a , and emits light forward through the through holes  32431   a . The diffusing plate  32433  is formed and disposed so as to cover all the through holes  32431   a . The diffusing plate  32433  is made of a transparent synthetic resin such as acrylic resin. Further, the front surface and the top surface of the diffusing plate  32433  is corrugated from its one end to the other end relative to its length. With this structure, the diffusing plate  32433  diffuses light from the LEDs  32432   a  linearly incident on the back surface, at its front surface and top surface and emits light as diffused light. 
     The diffusing plate  32433  is accommodated in the casing frame member  32434 . The casing frame member  32434  has the through holes  32434   a . The through holes  32434   a  are formed so as to leave the front surface and the both side surfaces of the diffusing plate  32433  uncovered. The casing frame member  32434  is covered by the transparent cover member  32435 . Thus, the upper side illumination module  3243  is configured to illuminate mostly the front side and the upper side of the top device  3 . 
     (Top Device  3 : Upper Display Device  32 : Bezel Mechanism  323 ) 
     The illumination mechanism  324  with the structure detailed above is provided at the front surface of the bezel mechanism  323 , as shown in  FIG. 31 . The bezel mechanism  323  has a rectangular frame member  3231 . The frame member  3231  has an open window  3231   a  at the central portion of the front surface. To the left side front surface, the right side front surface, and the upper side front surface of the frame member  3231  are provided attachment plates  3232 ,  3233 , and  3234 . To each of the attachment plates  3232 ,  3233 , and  3234  are attached the left side illumination module  3241 , the right side illumination module  3242 , and the upper side illumination module  3243  shown in  FIG. 30 , respectively. Further, to the lower side front surface of the frame member  3231  is provided a name plate  3235  showing the names of model and manufacturer. 
     (Top Device  3 : Upper Display Device  32 : Upper Display Mechanism  322 ) 
     The bezel mechanism  323  is attached to the upper display mechanism  322 . The upper display mechanism  322  includes a liquid crystal display device  3221  and a support mechanism  3222  configured to support the liquid crystal display device  3221 . As shown in  FIG. 32 , the liquid crystal display device  3221  has: an upper side touch panel  32211  disposed in the forefront position, an upper side liquid crystal display panel  32212  disposed on the back side of the upper side touch panel  32211 , a panel support base  32213  configured to support the upper side liquid crystal display panel  32212 , and a control board base  32214  disposed at the central portion of the panel support base  32213 . 
     The upper side liquid crystal display panel  32212  displays moving pictures such as video recordings, and image data of still image such as text and figures. The upper side touch panel  32211  let pass the image displayed on the upper side liquid crystal display panel  32212  so a player is able to see the image through the upper side touch panel  32211 , while enabling operation on screen by a finger tip of the player. The control board base  32214  has therein a not-shown control board for controlling the upper side liquid crystal display panel  32212 . 
     The liquid crystal display device  3221  has its circumference supported by the support mechanism  3222 . The support mechanism  3222  has a right side bracket  32221 , an upper side bracket  32222 , a left side bracket  32223 , and a lower side bracket  32224 . These brackets  32221  to  32224  abut the outer circumferential surface of the panel support base  32213 , and are fastened at both ends by using screws. 
     As shown in  FIG. 33 , the upper side bracket  32222  includes: a bottom surface portion  32222   a , a front side protrusion  32222   b  extended upward the front side of the bottom surface portion  32222   a , an intermediate uprising portion  32222   c  extended upward from the back side of the bottom surface portion  32222   a , a top surface portion  32222   d  extended backward from the upper side of the intermediate uprising portion  32222   c , and back side protrusions  32222   e  extended downward from the right side portion and the left side portion at the back side of the top surface portion  32222   d . As shown in  FIG. 29 , the back side protrusions  32222   e  are engaged with engagement holes  31   a . Thus, by engaging the back side protrusions  32222   e  of the upper side bracket  32222  with the engagement holes  31   a  after the bezel mechanism  323  and the illumination mechanism  324  are attached to the upper display mechanism  322 , the top device  3  enables screw-fastening while allowing temporarily positioning of the upper display upper display device  32  to the top box  31 . 
     (Device Main Body  4 ) 
     The top device  3  with the structure detailed above is provided on the top surface of the device main body  4 . The device main body  4  includes: a game mechanism device  41 , an upper door device  42  disposed at the upper portion of the front surface of the game mechanism device  41 , and a lower door device  43  disposed at the lower portion of the front surface of the game mechanism device  41 . The game mechanism device  41  accommodates therein various types of equipment such as reel device M 1  and various control boards. The both upper door device  42  and the lower door device  43  are configured to be opened and closed with respect to the game mechanism device  41 . Opening and closing of the upper door device  42  is enabled on condition that the lower door device  43  is opened. 
     (Device Main Body  4 : Upper Door Device  42 ) 
     As shown in  FIG. 34 , the upper door device  42  includes: an upper door main body  422 , a bezel mechanism  423 , an illumination mechanism  424 , a lower display mechanism  425 , an upper illumination mechanism  426 , and a lower illumination mechanism  427 . These mechanisms are assembled as a modularized upper door device  42  by: attaching the illumination mechanism  424  to the front surface of the bezel mechanism  423 ; attaching the lower display mechanism  425 , the upper illumination mechanism  426 , and the lower illumination mechanism  427  to the back surface of the bezel mechanism  423 ; and then attaching the mechanisms  423  to  427  to the front surface of the upper door main body  422 , as shown in  FIG. 35  to  FIG. 37 . 
     (Device Main Body  4 : Upper Door Device  42 : Symbol Display Window  42   a ) 
     The upper door device  42  has a symbol display window  42   a . The symbol display window  42   a  is covered by a reel cover  4231 . The reel cover  4231  includes: a base panel such as a transparent liquid crystal panel and a transparent panel, and a touch panel provided to the front surface of the base panel. The symbol display window  42   a  covered by the reel cover  4231  makes visible 15 symbols arranged in 5 columns, and 3 rows. Three symbols in each column are aligned in a single column on the outer circumferential surface of a reel M 3  of the reel unit M 11  shown in  FIG. 29 . It should be noted that the reel unit M 11  constitutes a part of the reel device M 1 . The reel unit M 11  and the reel device M 1  are detailed later. 
     The reel M 3  of each reel unit M 11  is configured so that its rotational speed and rotational direction are variable, and that, when symbols arranged in 5 columns and 3 rows are viewed through the symbol display window  42   a , symbols in the columns are displayed and moving upward and downward at different speeds. That is, the symbol display window  42   a  and the reel device M 1  enables a process of rearranging symbols displayed on each reel M 3  in which symbols on the reel M 3  are vertically rotated and then stopped. 
     In the left end portion and the right end portion of the symbol display window  42   a  are payline occurrence columns which are arranged symmetrically to the left and right. When viewing from the player&#39;s view point, the payline occurrence column in the left end portion on the left side has 15 payline occurrence parts. Similarly, the payline occurrence column in the right end portion on the right side has 15 payline occurrence parts. 
     The payline occurrence parts in the left end portion are each paired with any one of the payline occurrence parts in the right end portion. Between the payline occurrence parts on the left end portion and the associated payline occurrence parts on the right end portion are pre-set paylines. There are 15 pre-set paylines. 
     When a payline occurrence part on the left end portion and one on the right end portion are associated with each other, a payline connecting these to payline occurrence parts on both sides are activated. In other occasions, the payline is inactive. The number of paylines to be activated is determined on the basis of a bet amount. In cases of Maximum bet that is a case of placing a maximum bet amount, there will be 15 paylines, a maximum number of paylines, are activated. Based on the activated paylines, various winning combinations of symbols are established. The winning combinations are detailed later. 
     It should be noted that the present embodiment deals with a case where the slot machine  1  employs the reel device M 1  in the form of mechanical reels; however, the slot machine  1  may adopt in combination video reels which are pseudo reels and the mechanical reels. 
     (Device Main Body  4 : Upper Door Device  42 : Gaming Status Display Window  42   b ) 
     The upper door device  42  includes a gaming status display window  42   b . The gaming status display window  42   b  is disposed below the symbol display window  42   a . The gaming status display window  42   b  is configured to display various game-related information such as credit conditions and bet information. 
     (Device Main Body  4 : Upper Door Device  42 : Lower Display Mechanism  425 ) 
     The gaming status display window  42   b  allows the lower display mechanism  425  to be viewable from the front. As shown in  FIG. 36  and  FIG. 37 , the lower display mechanism  425  is provided on the back surface of the bezel mechanism  423 . As shown in  FIG. 38 , the lower display mechanism  425  includes a lower side touch panel  4251  provided on the forefront. The front peripheral edge of the lower side touch panel  4251  is joined with the back surface of the bezel mechanism  423  of  FIG. 35  by a cushion member  4252  which is sponge. The back surface of the lower side touch panel  4251  is connected with a lower side liquid crystal display panel  4254  via a cushion member  4253  made of rubber. The lower side liquid crystal display panel  4254  is supported at a peripheral edge by the panel support base  4255 , and a control board base  4256  is provided at a central part of the panel support base  4255 . 
     The lower side liquid crystal display panel  4254  displays image data constituted by a moving image such as a moving picture and a still image such as a text and a figure. The lower side touch panel  4251  allows an image displayed on the lower side liquid crystal display panel  4254  to pass through to be viewable by the player, and allows the player to make an input to the screen by a finger. The control board base  4256  includes a not-shown control board which controls the image display on the lower side liquid crystal display panel  4254 . 
     (Device Main Body  4 : Upper Door Device  42 : Lower Illumination Mechanism  427 ) 
     As shown in  FIG. 36 , above the lower display mechanism  425  is provided a lower illumination mechanism  427 . The lower illumination mechanism  427  is provided along the lower side portion of the symbol display window  42   a  to mainly illuminate a lower region of the surface of the reel device M 1  shown in  FIG. 29 . 
     As shown in  FIG. 39  and  FIG. 40 , the lower illumination mechanism  427  includes a light source supporter  4271  which is L-shaped when viewed in the left/right direction. The light source supporter  4271  includes an uprising portion  4271   a  attached to the back surface of the bezel mechanism  423  and a supporting portion  4271   b  which extends in the horizontal direction from the lower side of the uprising portion  4271   a . On the top surface of the supporting portion  4271   b , terminal members  4272  each including plurality of connection pins are provided. These terminal members  4272  are provided at end portions and a central portion in the longitudinal direction (left/right direction) of the light source supporter  4271 . In each of these terminal members  4272 , the connection pins are provided in the vertical direction, and electric power for illumination is output from these connection pins. 
     The terminal members  4272  at the right end portion and the central portion support the respective end portions of one lower side light source substrate  4273 . The terminal members  4272  at the left portion and the central portion support the respective end portions of the other lower side light source substrate  4273 . To these lower side light source substrates  4273 , the electric power for illumination is supplied from the connection pins of the light source supporter  4271 . 
     Each lower side light source substrate  4273  includes a light source supporting plate  42731  which is horizontally provided and a plurality of light source members  42732  provided on the top surface of the light source supporting plate  42731 . Each light source member  42732  is constituted by a full color LED or a mono-color LED, and is arranged to output illumination light mainly upward. These light source members  42732  are disposed at regular intervals to form a single line in the left/right direction. 
     Above the lower side light source substrate  4273  is provided a light reflecting plate  4274 . The light reflecting plate  4274  is a rectangular flat plate made of transparent resin such as acrylic resin, which allows the illumination light to pass through. One side and the other side of the light reflecting plate  4274  are each connected to the upper side of the uprising portion  4271   a  and the back side of the supporting portion  4271   b  of the light source supporter  4271 . With this, the normal vector with respect to the top surface and the under surface of the light reflecting plate  4274  is inclined backward, i.e., toward the reel device M 1  with respect to the upward direction. As a result, the lower illumination mechanism  427  mainly illuminates the lower region of the front surface of the reel device M 1 , as the illumination light output upward from the lower side light source substrate  4273  is bended toward the reel device M 1  by the light reflecting plate  4274 . 
     The above-described light reflecting plate  4274  is supported at a central part of the top surface by a supporting member  4275 . The supporting member  4275  includes a plate member  4275   a  and two claw members  4275   b  protruding forward from the both end portions on the upper side of the supporting member  4275 . The claw members  4275   b  contact with the top surface of the light reflecting plate  4274 . As shown in  FIG. 36  and  FIG. 37 , the plate member  4275   a  is screwed to the control board base  4256 . 
     (Device Main Body  4 : Upper Door Device  42 : Upper Illumination Mechanism  426 ) 
     Above the lower illumination mechanism  427  is provided an upper illumination mechanism  426 . The upper illumination mechanism  426  is provided along the upper side of the symbol display window  42   a , and illuminates mainly an upper region of the surface of the reel device M 1  shown in  FIG. 29 . 
     As shown in  FIG. 41  and  FIG. 42 , the upper illumination mechanism  426  includes a light source supporter  4261  which is L-shaped when viewed in the left/right direction. The light source supporter  4261  includes a downfalling portion  4261   a  attached to the back surface of the bezel mechanism  423  and a supporting portion  4261   b  extending horizontally from the lower side of the downfalling portion  4261   a . On the lower surface of the supporting portion  4261   b , terminal members  4262  having plurality of connection pins are provided. The terminal members  4262  are provided at both end portions and a central portion in the longitudinal direction (left/right direction) of the light source supporter  4261 . In these terminal members  4262 , the connection pins are provided in the vertical direction, and the electric power for illumination is output from these connection pins. 
     The terminal members  4262  at the right end portion and the central portion support the respective end portions of one upper side light source substrate  4263 . The terminal members  4262  at the left portion and the central portion support the both end portions of the other upper side light source substrate  4263 . These upper side light source substrates  4263  receive the electric power for illumination from the connection pins of the light source supporters  4261 . 
     Each upper side light source substrate  4263  includes a light source supporting plate  42631  which is horizontally provided and a plurality of light source members  42632  provided on the top surface of the light source supporting plate  42631 . Each light source member  42632  is constituted by a full color LED and a mono-color LED, and outputs illumination light mainly downward. These light source members  42632  are provided at regular intervals to form a single line in the left/right direction. 
     Above the upper side light source substrate  4263  is provided a light reflecting plate  4264 . The light reflecting plate  4264  is a rectangular flat plate made of transparent resin such as acrylic resin which allows illumination light to pass through. One side and the other side of the light reflecting plate  4264  are each connected with the upper side of the downfalling portion  4261   a  and the back side of the supporting portion  4261   b  of the light source supporter  4261 . With this, the normal vector with respect to the top surface and under surface of the light reflecting plate  4264  is inclined backward, i.e., toward the reel device M 1  with respect to the downward direction. With this, the upper illumination mechanism  426  illuminates mainly the upper region of the front surface of the reel device M 1 , as the illumination light output upward from the upper side light source substrate  4263  is bended toward the reel device M 1  by the light reflecting plate  4264 . 
     The above-described light reflecting plate  4264  is supported at a central portion of the top surface by a supporting member  4265 . The supporting member  4265  includes a plate member  4265   a , two claw members  4265   b  extending forward from the both end portions of the upper side of the supporting member  4265 , and a protrusion  4265   c  which protrudes forward from a central part of the supporting member  4265 . The claw members  4265   b  contact with the under surface of the light reflecting plate  4264 . As shown in  FIG. 36  and  FIG. 37 , the plate member  4265   a  is screwed to the control board base  4256 . The protrusion  4265   c  is screwed to the supporting portion  4261   b  of the light source supporter  4261 . 
     (Device Main Body  4 : Upper Door Device  42 : Illumination Mechanism  424 ) 
     Around the symbol display window  42   a  in the upper door device  42 , an illumination mechanism  424  is provided. As shown in  FIG. 43 , the illumination mechanism  424  includes a left side illumination module  4241  provided on the left side and a right side illumination module  4242  provided on the right side. 
     The left side illumination module  4241  includes an L-shaped bracket  42411 , an LED panel  42412  provided on the back surface of the L-shaped bracket  42411 , a dispersing plate  42413  provided on the front surface of the L-shaped bracket  42411 , a casing frame member  42414  provided to the front of the dispersing plate  42413 , and a cover member  42415  provided to the front of the casing frame member  42414 . 
     The L-shaped bracket  42411  includes a linear portion which extends in the vertical direction from the upper end portion to the lower end portion and a bent portion which extends rightward from the lower end portion, and has a plurality of through holes  432411   a  which are linearly lined up at regular intervals at the linear portion. The LED panel  42412  has a plurality of LEDs  42412   a . These LEDs  42412   a  are provided to correspond to the respective through holes  432411   a , and emit light forward through the through holes  432411   a . The dispersing plate  42413  is formed and positioned to cover all of the through holes  432411   a . The dispersing plate  42413  is made of synthetic resin such as acrylic resin which allows light to pass through. Furthermore, the front surface and the right surface of the dispersing plate  42413  are corrugated between the longitudinal ends. With this, when the light from the LEDs  42412   a  linearly enters from the back surface, the dispersing plate  42413  outputs the light as scattered light, thanks to the corrugated shape of each of the front surface and the right surface. 
     The dispersing plate  42413  is housed in the casing frame member  42414 . The casing frame member  42414  has a through hole  42414   a . The through hole  42414   a  is formed to expose the side surfaces and the front surface of the dispersing plate  42413 . The casing frame member  42414  is covered with a light-transmissive cover member  42415 . With this, the left side illumination module  4241  illuminates mainly the front side and the left side of the upper door device  42 . 
     In the meanwhile, the right side illumination module  4242  is constructed by members which are symmetrical with the members by which the left side illumination module  4241  is constructed. To be more specific, the right side illumination module  4242  includes an L-shaped bracket  42421 , an LED panel  42422  provided on the back surface of the L-shaped bracket  42421 , a dispersing plate  42423  provided on the front surface of the L-shaped bracket  42421 , a casing frame member  42424  provided to the front of the dispersing plate  42423 , and a cover member  42425  provided to the front of the casing frame member  42424 . 
     The L-shaped bracket  42421  includes a linear portion which extends in the vertical direction from the upper end portion to the lower end portion and a bent portion which extends leftward from the lower end portion, and in the linear portion a plurality of through holes  42421   a  are linearly lined up at regular intervals. The LED panel  42422  has a plurality of LEDs  42422   a . These LEDs  42422   a  are disposed to correspond to the respective through holes  42421   a , and emit light forward trough the through holes  42421   a . The dispersing plate  42423  is formed and disposed to cover all of the through holes  42421   a . The dispersing plate  42423  is made of synthetic resin such as acrylic resin which allows light to pass through. The front surface and the right surface of the dispersing plate  42423  are corrugated between the longitudinal ends. With this, when the light from the LED  42422   a  linearly enters from the back surface, the dispersing plate  42423  emits this light as scattered light thanks to the corrugated shape of each of the front surface and the right surface. 
     The dispersing plate  42423  is housed in the casing frame member  42424 . The casing frame member  42424  has a through hole  42424   a . The through hole  42424   a  is formed to expose the both side surfaces and the front surface of the dispersing plate  42423 . The casing frame member  42424  is covered with a light-transmissive cover member  42425 . With this, the right side illumination module  4242  illuminates mainly the front side and the right side of the upper door device  42 . 
     (Device Main Body  4 : Lower Door Device  43 ) 
     Below the upper door device  42  structured as above, a lower door device  43  is provided. As shown in  FIG. 44 , the lower door device  43  has a lower door base member  438  at a central portion in the forward/backward direction. The lower door base member  438  forms the frame of the lower door device  43 . 
     The lower door device  43  includes a front mask portion  43   c  provided at an upper central portion, speaker units  43   a  which are symmetrically provided to the left and right of the front mask portion  43   c , a PTS unit  43   d , and a bill unit  43   e  provided to the right of the PTS unit  43   d . Furthermore, the lower door device  43  includes a control panel unit  43   f  provided below the PTS unit  43   d  and the bill unit  43   e , a bill cover unit  43   g  provided below the right side of the control panel unit  43   f , and a lower front cover unit  43   h  provided to the left of the bill cover unit  43   g . These members  43   a  to  43   h  are formed by attaching components to the lower door base member  438 . 
     The front mask portion  43   c  has, at the forefront, a front mask cover  431  which has an apex on the front side. The speaker units  43   a  have, at the forefront, speaker covers  432   a  and  432   b  having holes, and speakers  433   a  and  433   b  which are provided behind the speaker covers  432   a  and  432   b  as shown in  FIG. 45 . The PTS unit  43   d  has a PTS cover  434  at the forefront, and a not-shown PTS unit is attached in place of the PTS cover  434 , according to need. 
     The PTS unit has a function of producing gaming effects by sound and images and updating or the like of credit data in communication with the game controller, and a function of sending necessary credit data at the time of settlement in communication with the bill validation controller. The PTS unit is connected with a management server so as to be able to communicate therewith, and the PTS unit and the management server are able to communicate with each other by two lines, i.e., a normal communication line and an additional function communication line. The PTS unit exchanges data such as cash data, identification code data, membership information of players, or the like by the normal communication line. Furthermore, the PTS unit performs communications regarding a newly-added function by the additional function communication line. To be more specific, by the additional function communication line, the PTS unit performs communications regarding an exchange function, and IC card function, a biometric identification function, a camera function, a RFID (Radio Frequency Identification) function which is for executing a solid-matter identification function with radio wave. 
     (Device Main Body  4 : Lower Door Device  43 : Bill Unit  43   e ) 
     The bill unit  43   e  includes a bill handling mechanism  435 . As shown in  FIG. 46 , the bill handling mechanism  435  has a print discharge slot  435   a  at an upper portion of the front surface and a bill insertion slot  435   b  at a lower portion of the front surface. Between the print discharge slot  435   a  and the bill insertion slot  435   b , a bill face plate  4351  which has a predetermined color and made of a light-transmissive material is provided. On the back side of the bill face plate  4351  is provided a light emitting substrate  4353  which includes not-shown full color LEDs or the like and is shown in  FIG. 45 . When the bill handling mechanism  435  is operated, the light emission substrate  4353  emits light with a color and/or blinking intervals corresponding to the content of the operation, so as to emit light forward through the bill face plate  4351 . 
     The print discharge slot  435   a  is connected to the front end portion of an inclined plate  4352 . The inclined plate  4352  is inclined such that the front end portion is lower than the rear end portion. The rear end portion of the inclined plate  4352  communicates with a printer device PR as shown in  FIG. 47 . The printer device PR is arranged to print bill information such as a credit on a bill sheet and send out the bill sheet through the print discharge slot  435   a  shown in  FIG. 44 . The printer device PR is inclined in the same direction as the inclined plate  4352 . As the direction of sending out the bill sheet is obliquely downward, the bill sheet is ejected from the print discharge slot  435   a  by utilizing the gravity in addition to the sending-out force of the printer device PR itself. 
     In the meanwhile, the bill insertion slot  435   b  communicates with an insertion slot BIa of a bill stocker BI. The bill stocker BI has a function of, after drawing a bill inserted into the bill insertion slot  435   b  into the inside, determining the authenticity of the bill, and ejecting the bill from the bill insertion slot  435   b  if it is not authentic or performing storing or the like of the bill in accordance with the type of the bill if it is authentic. 
     (Device Main Body  4 : Lower Door Device  43 : Control Panel Unit  43   f ) 
     In addition to the above, as shown in  FIG. 44 , the control panel unit  43   f  includes a control panel CP shown in  FIG. 29 . As shown in  FIG. 48 , the control panel CP includes a flat base plate CP 9  and a plurality of operation buttons CP 1  to CP 8  provided on the base plate CP 9 . The operation button CP 1  is larger in size than the other buttons CP 2  to CP 8  and is disc-shaped, to allow the player to easily recognize and press the button. The operation button CP 1  is provided at a right end portion of the base plate CP 9  and has a function as a start button or a spin button which is pressed to start a game. 
     The operation buttons CP 2 , CP 3 , CP 4 , CP 5 , and CP 6  are lined up at regular intervals to form a single line, to the left of the operation button CP 1 . These operation buttons CP 2  to CP 6  are rectangular in shape. The rightmost operation button CP 2  has a function as a max-bet button which is pressed to start a game with the maximum bet number such as 10 times. The operation button CP 3  has a function as a 5-bet button which is pressed to start a game with a bet number of 5 times. The operation button CP 4  has a function as a 3-bet button which is pressed to start a game with a bet number of 3 times. The operation button CP 5  has a function as a 2-bet button which is pressed to start a game with a bet number of 2 times. The operation button CP 6  has a function as a 1-bet button which is pressed to start a game with a bet number of 1 time. 
     The operation buttons CP 7  and CP 8  are provided at a left end portion of the base plate CP 9  to be lined up in the forward/backward direction. The operation button CP 7  has a function as a help button which is pressed to display help information regarding how to play a game or the like on the lower display mechanism  425  of the gaming status display window  42   b . The operation button CP 8  has a function as a cash-out button which is pressed to cash out credits in the form of coins or bills. 
     (Device Main Body  4 : Lower Door Device  43 : Lower Front Cover Unit  43   h ) 
     As shown in  FIG. 44 , a lower front cover  436  is provided below the control panel unit  43   f . The lower front cover  436  has a counter window  436   a  at an upper portion. Behind the counter window  436   a , as shown in  FIG. 45 , a counter mechanism CT is provided. The counter mechanism CT has, for example, a function of counting the total game number after resetting and a function of displaying various measured values. The counter window  436   a  allows a measured value displayed on the counter mechanism CT to be viewable from the front side. 
     As shown in  FIG. 49 , the counter mechanism CT includes members such as a support member CT 1  and a lid member CT 2  which covers the upper part of the support member CT 1 . The support member CT 1  and the lid member CT 2  form an internal housing space. In this housing space, five counters CT 3  each of which can deal with 6 digits at the maximum are provided. 
     Furthermore, as shown in  FIG. 44 , below the counter mechanism CT is provided a sub I/O mechanism SI. The sub I/O mechanism SI is provided on the back surface of the lower door base member  438 . The sub I/O mechanism SI has a sub substrate casing SI 1 . The sub substrate casing SI 1  is a box which is open on the front side which is the lower door base member  438  side. At the right side surface of the sub substrate casing SI 1 , a concave portion SI 1   a  is formed. At a position corresponding to the concave portion SI 1   a , a clamping member SI 2  is provided. The clamping member SI 2  bundles not-shown signal cables which are wired inside and outside the sub substrate casing SI 1  via the concave portion SI 1   a.    
     In addition to the above, at each corner of the sub substrate casing SI 1 , a claw member SI 1   b  is formed as shown in  FIG. 47 . The claw member SI 1   b  protrudes forward from each of the front end portions of the side walls, and has a notch portion which extends upward at the root portion on the side wall side. In the meanwhile, in the lower door base member  438 , engaging holes  438   a  are formed at positions corresponding to the respective claw members SI 1   b  of the sub substrate casing SI 1 . Each engaging hole  438   a  is arranged to be engaged with the claw member SI 1   b  when the claw member SI 1   b  of the sub substrate casing SI 1  is inserted from the back side and then the sub substrate casing SI 1  is pressed down. As such, the sub substrate casing SI 1  is maintained to be attached to the lower door base member  438  by the engagement of the claw members SI 1   b  and the gravity on the sub substrate casing SI 1 , even if the sub substrate casing SI 1  is not supported by an external force. 
     In addition to the above, the sub substrate casing SI 1  has a fixing portion SI 1   c  which extends upward from a upper middle portion of the upper end of the side wall. The fixing portion SI 1   c  is screwable to the lower door base member  438  when the sub substrate casing SI 1  is attached to the lower door base member  438  by the claw members SI 1   b . As such, it is impossible to detach the sub substrate casing SI 1  from the lower door base member  438 , unless the lower door device  43  is opened, the fixing portion SI 1   c  provided on the back side of the lower door device  43  is unscrewed, and the claw members SI 1   b  are disengaged. 
     The sub substrate casing SI 1  stores a sub I/O substrate SI 3 . The sub I/O substrate SI 3  is constituted by a printed board which functions as an interface for button operations of the control panel CP on the lower door device  43  and for electric components for illumination or the like. With this, a mechanical access to the sub I/O substrate SI 3  is impossible unless the sub substrate casing SI 1  is detached. 
     (Device Main Body  4 : Lower Door Device  43 : Bill Cover Unit  43   g ) 
     As shown in  FIG. 44 , a bill cover unit  43   g  is provided to the right of the lower front cover unit  43   h . The bill cover unit  43   g  is arranged to be openable and to be lockable by a key when closed. To be more specific, as shown in  FIG. 50 , the bill cover unit  43   g  has a bill drop door  437  at the forefront. In an upper portion of the bill drop door  437  is formed a through hole  437   a . The through hole  437   a  allows a key portion BR 4   a  of a key cylinder BR 4  in a bill cover lock mechanism BR to be exposed frontward. 
     As shown in  FIG. 51 , a bill cover base member  439  is provided on the back surface of the bill drop door  437 . The bill cover base member  439  supports the bill drop door  437  by the front surface and supports a part of the bill cover lock mechanism BR and a part of the bill cover hinge mechanism BH by the back surface. 
     (Device Main Body  4 : Lower Door Device  43 : Bill Cover Unit  43   g : Bill Cover Hinge Mechanism BH) 
     As shown in  FIG. 52 , the bill cover hinge mechanism BH is provided at a right end portion of the bill cover base member  439 . The bill cover hinge mechanism BH is formed by rotatably connecting, by an engagement pin, one hinge member BH 1  fixed to the bill cover base member  439  with the other hinge member BH 2  fixed to the lower door base member  438 . The rotation axis of the bill cover hinge mechanism BH extends in the vertical direction, and the bill cover hinge mechanism BH supports the bill drop door  437  and the bill cover base member  439  of the bill cover unit  43   g  to be horizontally openable. 
     (Device Main Body  4 : Lower Door Device  43 : Bill Cover Unit  43   g : Bill Cover Lock Mechanism BR) 
     In the meanwhile, at a left end portion of the bill cover base member  439  is provided a bill cover lock mechanism BR. The bill cover lock mechanism BR includes a locking member BR 1  fixed to the lower door base member  438  and an engagement member BR 2  fixed to the bill cover base member  439 . The locking member BR 1  includes two protrusions BR 1   a  which protrude leftward from an upper portion and a lower portion of the bill cover unit  43   g . In the meanwhile, the engagement member BR 2  includes claw members BR 2   a  which are disposed to be engaged with the protrusions BR 1   a . The claw members BR 2   a , the leading end portions of which point upward, are engaged with the protrusions BR 1   a  when the engagement member BR 2  is at a bill locking height position, and are disengaged from the protrusions BR 1   a  when the engagement member BR 2  is lowered from the bill locking height position to a bill locking cancellation height position. 
     As shown in  FIG. 51 , the engagement member BR 2  is a long plate and is provided to be movable in the vertical direction with respect to the bill cover base member  439 . In the engagement member BR 2 , the claw members BR 2   a  are movable in a range between an upper limit position which is not lower than the bill locking height position and a lower limit position which is lower than the bill locking cancellation height position. The engagement member BR 2  has, at an upper end portion, an abutting portion BR 2   b  which extends rightward. At a root portion of the abutting portion BR 2   b , an end of a spring BR 3  is connected. The other end of the spring BR 3  is connected with the bill cover base member  439 , and hence the spring BR 3  biases the engagement member BR 2  upward. 
     Above the abutting portion BR 2   b  is provided a key cylinder BR 4 . The key cylinder BR 4  is provided on the front wall of the bill cover base member  439 . The key cylinder BR 4  includes a key portion BR 4   a  shown in  FIG. 50  and a rotational portion BR 4   b  provided behind the key portion BR 4   a . The rotational portion BR 4   b  has a rotation axis which is vertical with respect to the front wall of the bill cover base member  439 . When a not-shown key is inserted into the key portion BR 4   a  and rotated, the rotational portion BR 4   b  is rotated about the rotation axis in the rotational direction of the key. 
     The rotational portion BR 4   b  is a rectangular plate and a longitudinal end portion thereof corresponds to the rotation axis. When the rotational portion BR 4   b  is rotated so that its longitudinal direction corresponds to the vertical direction, the other end portion contacts with the engagement member BR 2  to press down the engagement member BR 2  to the lower limit position which is lower than the bill locking cancellation height position. In the meanwhile, when the rotational portion BR 4   b  is rotated so that its longitudinal direction corresponds to the left/right direction, the other end portion is moved away from the engagement member BR 2  so that the engagement member BR 2  is elevated by the spring BR 3  to the upper limit position which is not lower than the bill locking height position. 
     With this, when the bill cover unit  43   g  is closed, as the not-shown key is inserted into the key cylinder BR 4  and the rotational portion BR 4   b  is rotated to contact with and press down the abutting portion BR 2   b , the bill cover unit  43   g  is unlocked and opened. In the meanwhile, when the bill cover unit  43   g  is open, after the rotational portion BR 4   b  is rotated by the not-shown key in the direction of moving away from the abutting portion BR 2   b , the bill cover unit  43   g  is locked by the biasing force of the spring BR 3  when the bill cover unit  43   g  is closed. 
     The opening and closing of the bill drop door  437  are detectable by a bill drop door switch SE 5 . The bill drop door switch SE 5  is provided at the lower door base member  438  of the lower door device  43 , and is arranged to turn on when the bill drop door  437  is closed and to turn off when the bill drop door  437  is opened. The bill drop door switch SE 5  is monitored based on a sensor signal from the bill drop door switch SE 5 . 
     (Device Main Body  4 : Bill Stocker BI) 
     When the bill cover unit  43   g  is opened, as shown in  FIG. 52 , a bill stocker case BI 2  storing the bill stocker BI is exposed forward. As shown in  FIG. 53 , the bill stocker case BI 2  includes a rectangular parallelepiped bill stocker case main body BI 5  which is open at the top and at the front and a bill stocker door BI 3  with which the front side of the bill stocker case main body BI 5  is openable. At an opened part on the top side of the bill stocker case main body BI 5 , an upper mechanism BI 5  having an insertion slot BIa of the bill stocker BI protrudes. At the inner surface of the back wall of the bill stocker case main body BI 5 , a not-shown bill stocker sensor is provided for detecting the presence of the bill stocker BI. 
     At an upper central part of the front surface of the bill stocker door BI 3 , a key portion BI 4   a  of a key cylinder BI 4  is provided. The key cylinder BI 4  includes the key portion BI 4   a  and a rotational portion BI 4   b  which is provided behind the key portion BI 4   a  as shown in  FIG. 54 . As shown in  FIG. 54 , the rotational portion BI 4   b  protrudes toward the back surface side of the bill stocker door BI 3 , and has a rotation axis which is vertical to the front wall of the bill stocker door BI 3 . With this, when the unillustrated key is inserted into the key portion BI 4   a  and rotated, the rotational portion BI 4   b  is rotated about the rotation axis in the rotational direction of the key. 
     The rotational portion BI 4   b  is formed by a rectangular plate, and a longitudinal center of this portion corresponds to the rotation axis. To longitudinal end portions of the rotational portion BI 4   b , one end portions of paired engagement members BI 4   c  are connected. The engagement members BI 4   c  and the rotational portion BI 4   b  are rotatably connected with one another. Each engagement member BI 4   c  is supported at its central portion to be movable in the left/right direction. With this, the engagement members BI 4   c  are arranged such that the distances between the other end portions of the engagement members BI 4   c  and the rotational center are changeable by the rotation of the rotational portion BI 4   b.    
     At upper parts on the front sides of the left and right walls of the bill stocker case main body BI 5 , through holes BI 2   a  are formed, respectively. These through holes BI 2   a  are formed so that the other end portions of the engagement members BI 4   c  can be inserted thereto. In the meanwhile, the lower parts on the front sides of the left and right walls of the bill stocker case main body BI 5  rotatably support the lower end portion of the bill stocker door BI 3  with the rotation axis extending in the left/right direction. 
     With this, as the longitudinal direction of the rotational portion BI 4   b  of the key cylinder BI 4  corresponds to the left/right direction while the bill stocker door BI 3  is closed, the bill stocker door BI 3  is locked as the other end portions of the engagement members BI 4   c  are inserted into the through holes BI 2   a . In the meanwhile, as the not-shown key is inserted into the key cylinder BI 4  and the rotational portion BI 4   b  is rotated to draw the engagement members BI 4   c  toward the rotational center, the locking of the bill stocker door BI 3  by the key cylinder BI 4  is canceled. In the meanwhile, as the upper end portion of the bill stocker door BI 3  is drawn forward, the bill stocker door BI 3  is tilted about the lower end portion, so that the front side of the bill stocker case main body B 15  is opened. As the front side of the bill stocker case main body BI 5  is opened, as shown in  FIG. 54 , a gripping portion BI 5  of the bill stocker BI is exposed, and hence the bill stocker BI can be drawn frontward by gripping the gripping portion BI 5 . 
     As such, because the slot machine  1  includes the openable bill cover unit  43   g , a person can access the bill stocker BI no matter whether the lower door device  43  is open or closed. Furthermore, it is possible to access the bill stocker BI by performing two opening operations, i.e., an operation to open either the lower door device  43  or the bill cover unit  43   g  and an operation to open the bill stocker door BI 3 . 
     (Device Main Body  4 : Game Mechanism Device  41 : Casing  411 ) 
     As shown in  FIG. 55 , the bill stocker BI is provided at a lower right part in the game mechanism device  41 . The game mechanism device  41  includes a casing  411  which houses various devices and mechanisms such as the bill stocker BI. The casing  411  is a box which is open on the front side. The upper door device  42  is provided at an upper front portion of the casing  411 , whereas the lower door device  43  is provided at a lower front portion of the casing  411 . 
     As shown in  FIG. 57 , the casing  411  has, through the top wall, two through holes  411   a  and a plurality of slits  411   b . Into the through holes  411   a , not-shown signal cables, electric power cables, or the like are inserted. In the meanwhile, the slits  411   b  connect the internal space of the top box  31  shown in  FIG. 55  and  FIG. 56  with the internal space of the casing  411  to allow the air to flow between the top box  31  and the casing  411 . At an upper end portion of the right side wall of the casing  411 , two key switch holes  411   c  and a plurality of air holes  411   d  are formed. At one of the key switch holes  411   c , a reset key switch RS for monitoring temperatures is provided. The reset key switch RS is used to cancel a power save mode when the power source unit RU is in the power save mode. On the inner side of the air holes  411   d , as shown in  FIG. 59 , a casing fan KF is provided. The casing fan KF allows the outside air to flow into the casing  411  through the air holes  411   d . The casing fan KF is provided with a not-shown casing fan sensor FNS 2 , and this casing fan sensor FNS 2  detects the temperature of the casing fan KF and outputs a casing fan temperature signal. 
     In addition to the above, as shown in  FIG. 57 , through a central part of the right side wall of the casing  411 , an air intake hole  411   e , a key hole  411   f , and a locking hole  411   g  are formed. The air intake hole  411   e  is connected to the internal space of the shelf board member R 21  to allow the external air to flow into the security cage SK via the shelf board member R 21 . At the key hole  411   f  is provided a key cylinder D 25  of a door lock mechanism D. The locking hole  411   g  is provided below the key hole  411   f  and is a long hole which is long in the vertical direction. At the locking hole  411   g  is provided a door lock bar D 24  of the door lock mechanism D. The door lock mechanism D will be detailed later. 
     In the meanwhile, at an upper portion and a lower portion of the left side wall of the casing  411 , as shown in  FIG. 28 , a plurality of air holes  411   h  and  411   j  are formed. The air holes  411   h  and  411   j  allow the outside air to flow into the casing  411 . At a central part of the left side wall of the casing  411 , an air intake hole  411   i  is formed. The air intake hole  411   i  is connected to the internal space of the shelf board member R 21  to allow the external air to flow into the security cage SK via the shelf board member R 21 . Furthermore, at a lower end portion on the front side of the left side wall of the casing  411 , a plurality of air holes  411   k  are formed for cooling the power source. In the meanwhile, the air hole  411   i  at the central part allows the air inside the casing  411  to flow out in cooperation with a later-described radiation mechanism R. 
     The above-described casing  411  has a three-layer structure such that the internal space is divided into three spaces in the vertical direction. To put it differently, the game mechanism device  41  includes a top space  41 A, a middle space  41 B, and a bottom space  41 C. The top space  41 A and the middle space  41 B are divided by the upper side support member  4111 . As shown in  FIG. 56 , at a left side portion of the front wall of the upper side support member  4111 , a communication connector  4113  conforming to a communication standard such as RS232C is provided. The communication connector  4113  is connectable, via a communication cable, to an information processing terminal by which the falsification of programs or the like is checked. Furthermore, at a right side portion of the front wall of the upper side support member  4111 , circuit breakers  4115   a ,  4115   b , and  4115   c  for 2 amperes, 4 amperes, and 8 amperes are provided. 
     In addition to the above, the middle space  41 B and the bottom space  41 C are divided by the shelf board member R 21 . The shelf board member R 21  functions as a security cage cooling mechanism R 2  for forcibly cooling electronic components or the like in the security cage SK by air. The top space  41 A houses members such as the reel device M 1  and the main body substrate casing Ni. The middle space  41 B houses the printer device PR and is able to house a not-shown PTS unit. The bottom space  41 C houses members such as the security cage SK, the bill stocker BI, a speaker unit SP, and the power source box R 11  (power source unit RU). The speaker unit SP includes a speaker device SP and a baffle SP 2  supporting the speaker device SP 1 . 
     (Device Main Body  4 : Upper Door Opening Mechanism  412  and Lower Door Opening Mechanism  413 ) 
     As shown in  FIG. 58 , the casing  411  supports, at the left end portion, the upper door device  42  and the lower door device  43  to be rotatable. The upper door device  42  and the casing  411  are rotatably connected with each other at the upper end portion and the lower end portion of the upper door device  42 , by means of the upper door opening mechanism  412 . The upper door opening mechanism  412  has a stick-shaped member  4121  which is rotatably supported by the back wall of the upper door device  42  at one end portion and a sliding member  4122  which is horizontally disposed on the front side of the casing  411 . The sliding member  4122  is engaged with the other end portion of the stick-shaped member  4121  to allow the stick-shaped member  4121  to be horizontally movable. The sliding member temporarily stops the upper door device  42  at a predetermined opening angle, and rotates the upper door device  42  to the closing direction when the upper door device  42  is biased by a predetermined or more external force in the closing direction. 
     In addition to the above, the lower door device  43  and the casing  411  are rotatably connected with each other at the upper end portion and the lower end portion of the lower door device  43  by means of the lower door opening mechanism  413 . The lower door opening mechanism  413  includes a stick-shaped member  4131  rotatably supported by the back wall of the lower door device  43  at one end portion and a sliding member  4132  which is horizontally disposed on the front side of the casing  411 . The sliding member  4132  is engaged with the other end portion of the stick-shaped member  4131  to allow the stick-shaped member  4131  to be horizontally movable. The sliding member temporarily stops the lower door device  43  at a predetermined opening angle, and rotates the lower door device  43  to the closing direction when the lower door device  43  is biased by a predetermined or more external force in the closing direction. 
     (Device Main Body  4 : Door Lock Mechanism D: Lower Door Lock Mechanism D 2 ) 
     In addition to the above, as shown in  FIG. 59 , the casing  411  has the door lock mechanism D at the right end portion. The door lock mechanism D includes an upper door lock mechanism D 1  which locks the upper door device  42  to maintain a closed state and a lower door lock mechanism D 2  which locks the lower door device  43  to maintain a closed state. 
     As shown in  FIG. 60 , the lower door lock mechanism D 2  includes a locking member D 21  which is fixed to the right end portion of the back wall of the lower door device  43  and an engagement member D 22  fixed to the casing  411 . The locking member D 21  has, at an upper portion and a lower portion, two protrusions D 21   a  which protrude leftward. In the meanwhile, the engagement member D 22  is a long plate and is movable in the vertical direction with respect to the casing  411 . 
     The engagement member D 22  has claw members D 22   a  which are disposed to be engaged with the protrusions D 21   a . The claw members D 22   a  protrude toward the lower door device  43  (i.e., forward) while the leading end portions thereof extend downward. The claw members D 22   a  are engaged with the protrusions D 21   a  when the engagement member D 22  is at a lower door locking height position, and are disengaged from the protrusions D 21   a  when the engagement member D 22  is elevated from the lower door locking height position to a lower door locking cancellation height position. The lower portion of the leading end face of each of the claw members D 22   a  is inclined obliquely downward, and the claw members D 22   a  are pushed up as they contact with the protrusions D 21   a.    
     The engagement member D 22  is arranged so that each of the claw members D 22   a  is movable between a lower limit position which is not higher than the lower door locking height position and an upper limit position which is not lower than the lower door locking cancellation height position. The engagement member D 22  has a spring engagement portion D 22   b  which protrudes backward at a lower portion. The spring engagement portion D 22   b  is connected with one end of the spring D 23 . The other end of the spring D 23  is connected with the casing  411 , and the spring D 23  biases the engagement member D 22  downward. 
     The engagement member D 22  has a pull-up portion D 22   c  at a central portion. The pull-up portion D 22   c  protrudes backward. On the right surface of the pull-up portion D 22   c , the door lock bar D 24  is provided. As shown in  FIG. 58 , the door lock bar D 24  is inserted into the key hole  411   f  of the casing  411 , and the leading end portion of the door locking bar  24  protrudes to the outside. The door lock bar D 24  allows an operator to grip the casing  411  from the outside and pulls up the casing  411 . With this, as the engagement member D 22  is elevated in accordance with the pull-up of the door lock bar D 24 , the claw members D 22   a  are disengaged from the protrusions D 21   a.    
     Above the door lock bar D 24  is provided the key cylinder D 25 . The key cylinder D 25  is exposed to the outside at the key portion where the key is inserted, and a cylinder portion rotated by the key is positioned inside the casing  411 . As shown in  FIG. 59 , the cylinder portion of the key cylinder D 25  is provided with an abutting member D 26  which is a rectangular plate. 
     One longitudinal end portion of the abutting member D 26  is connected with the cylinder portion of the key cylinder D 25 , whereas the other end portion is rotatable about the key cylinder D 25 . When the abutting member D 26  is in a locked state in which the direction from the one end portion to the other end portion corresponds to the downward direction, the pull-up portion D 22   c  is fixed at the lower limit position which is not higher than the lower door locking height position as the other end portion contacts with the top surface of the pull-up portion D 22   c . In the meanwhile, when the abutting member D 26  is in a locking cancellation state in which the abutting member D 26  is rotated so that the direction from the one end portion to the other end portion is above the left/right direction, the other end portion is sufficiently distanced from the top surface of the pull-up portion D 22   c , and hence the pull-up portion D 22   c  can be elevated to the upper limit position which is not lower than the lower door locking cancellation height position. 
     With this, when the abutting member D 26  contacts with the pull-up portion D 22   c  while the lower door device  43  is in the closed state, because the elevation of the door locking bar D 24  is prohibited, the locking by which the closing state of the lower door device  43  is maintained is performed even if the force of pulling up the door lock bar D 24  is exerted. When the not-shown key is inserted into the key cylinder D 25  and the contact between the abutting member D 26  and the pull-up portion D 22   c  is canceled, the lower door device  43  is unlocked as the prohibition of the elevation of the door lock bar D 24  is canceled. At this stage, on account of the weight of the engagement member D 22  and the downward biasing force of the spring D 23 , the closed state of the lower door device  43  is maintained. Thereafter, when the door lock bar D 24  is pulled up by the operator, the engagement member D 22  is elevated to a position not lower than the lower door locking cancellation height position, and the right end portion of the lower door device  43  is pulled forward, the engagement between the claw members D 22   a  and the protrusions D 21   a  is canceled and the lower door device  43  is opened. When the lower door device  43  is closed, the protrusions D 21   a  push up the claw members D 22   a  and are engaged with the claw members D 22   a , with the result that the lower door device  43  is automatically locked. 
     As shown in  FIG. 58 , the lower door device  43  is detectable by a first lower door switch SE 1  and a second lower door switch SE 2 , and is also detectable by two reflective lower door optical sensors SE 4 . The door switches SE 1  and SE 2  are provided to be able to contact with an upper end face on the back side of the lower door device  43 , and are turned on when the lower door device  43  is closed and turned off when the lower door device  43  is opened. The lower door optical sensors SE 4  are disposed to be able to detect reflected light from a reflection plate provided at an upper end face on the back side of the lower door device  43 , and are turned on when the lower door device  43  is closed and turned off when the lower door device  43  is opened. As such, the door switches SE 1  and SE 2  and the lower door optical sensors SE 4  are able detect the opening/closing state by detecting the presence of the lower door device  43 . 
     (Device Main Body  4 : Door Lock Mechanism D: Upper Door Lock Mechanism D 1 ) 
     Above the lower door lock mechanism D 2  arranged as described above, an upper door lock mechanism D 1  is provided. As shown in  FIG. 61 , the upper door lock mechanism D 1  includes a locking member D 11  fixed to a right end portion of the back wall of the upper door device  42  and an engagement member D 12  fixed to the casing  411 . The locking member D 11  has two first protrusions D 11   a  protruding leftward at an upper portion and a lower portion and a second protrusion D 11   b  at a central portion. The engagement member D 12  is a long plate and is movable in the vertical direction with respect to the casing  411 . 
     The engagement member D 12  includes claw members D 12   a  disposed to be engaged with the first protrusions D 11   a . The claw members D 12   a  protrude toward the upper door device  42  (i.e., forward) while the leading end portions thereof extend downward, and the claw member D 12   a  are engaged with the first protrusions D 11   a  when the engagement member D 12  is at an upper door locking height position, and are disengaged from the first protrusions D 11   a  when the engagement member D 12  is elevated from the upper door locking height position to an upper door locking cancellation height position. The lower portion of the leading end face of each of the claw members D 12   a  is inclined obliquely downward, and the claw members D 12   a  are therefore pushed up when contacting with the first protrusions D 11   a.    
     The engagement member D 12  is arranged so that the claw members D 12   a  are each movable in a range between a lower limit position which is not higher than the upper door locking height position and an upper limit position which is not lower than the upper door locking cancellation height position. The engagement member D 12  is, at a central part, connected with one end of the spring D 13 . The other end of the spring D 13  is connected with the casing  411 , and the spring D 13  biases the engagement member D 12  downward. 
     The engagement member D 12  has an abutting portion D 12   b . The abutting portion D 12   b  protrudes forward (toward the upper door device  42 ) from a central part of the engagement member D 12 . The top surface of the abutting portion D 12   b  is an inclined surface which lowers from the engagement member D 12  side toward the leading end portion. The abutting portion D 12   b  is disposed in such a way that the abutting portion D 12   b  is distant from the second protrusion D 11   b  when the engagement member D 12  is at a height position not higher than the upper door locking height position, whereas the abutting portion D 12  pushes the upper door device  42  is forward while the top surface (inclined surface) of the abutting portion D 12   b  contacts with the second protrusion D 11   b , when the engagement member D 12  is elevated to a position not lower than the upper door locking cancellation height position. 
     In addition to the above, the engagement member D 12  is, at a lower portion, connected to an upper portion of a push-up member D 14 . The push-up member D 14  is stick-shaped and is disposed such that the longitudinal direction thereof corresponds to the vertical direction. The lower end of the push-up member D 14  is able to contact with a rear end portion D 15   a  of a link member D 15 . The link member D 15  is rotatably supported by the casing  411  such that a central part of the link member D 15  is the highest position and a part between the central part and the rear end portion D 15   a  and a part between the central part and the front end portion D 15   b  are both sloped downward. With this, as the front end portion D 15   b  is pushed backward, the link member D 15  rotates about the supported central part, so that the rear end portion D 15   a  is moved upward. 
     The link member D 15  above is disposed to satisfy a first height condition in which the front end portion D 15   b  is below the lower end portion of the push-up member D 14  when the engagement member D 12  is at a height position of not higher than the upper door locking height position and a second height condition in which, when the front end portion D 15   b  is pushed backward, the link member D 15  rotates about the supported central portion so that the rear end portion D 15   a  is moved upward, and the link member D 15  contacts with the lower end portion of the push-up member D 14  and hence the engagement member D 12  is elevated to a position not lower than the upper door locking cancellation height position. 
     In addition to the above, as shown in  FIG. 58  and  FIG. 59 , the link member D 15  is disposed to satisfy a third height condition in which the link member D 15  is on the back side of the lower door device  43  when the front end portion D 15   b  is at a height position lower than the upper end of the lower door device  43 . In other words, the upper door lock mechanism D 1  is arranged such that the front end portion D 15   b  of the link member D 15  is not exposed to the outside unless the lower door device  43  is opened. 
     As such, when the upper door device  42  is opened, the lower door device  43  is opened and then the front end portion D 15   b  of the link member D 15  is exposed to the outside. As the front end portion D 15   b  is pushed in, the rear end portion D 15   a  is elevated and the engagement member D 12  is elevated together with the push-up member D 14 . When the engagement member D 12  is elevated to a position not lower than the upper door locking cancellation height position, the claw members D 12   a  are disengaged from the first protrusions D 11   a . At the same time, the abutting portion D 12   b  contacts with the second protrusion D 11   b  and the upper door device  42  is pushed forward, with the result that the upper door device  42  is automatically opened. When the upper door device  42  is closed, the first protrusions D 11   a  push up the claw members D 12   a  and are engaged with the claw members D 12   a , with the result that the upper door device  42  is automatically locked. 
     The upper door device  42  is arranged to be detectable by an upper door switch SE 3 . The upper door switch SE 3  is disposed to be able to contact with a lower end face on the back side of the upper door device  42 , and is turned on when the upper door device  42  is closed and is turned off when the upper door device  42  is opened. As such, the upper door switch SE 3  is able to detect the opening/closing state by detecting the presence of the upper door device  42 . 
     (Device Main Body  4 : Game Mechanism Device  41 : Reel Device M 1 ) 
     In the top space  41 A of the casing  411 , as shown in  FIG. 55  and  FIG. 56 , the reel device M 1  is detachably provided. As shown in  FIG. 62 , the reel device M 1  includes reel units M 11  each of which rearranges symbols by rotationally driving a reel M 3  having an outer circumferential surface on which the symbols are arranged. Hereinafter, the installation locations of the reel units M 11  will be specified as, from the left end, first to fifth reel units M 11   a  to M 11   e.    
     The reel units M 11  are supported by a plurality of reel supporting mechanisms M 6 , respectively. Each reel supporting mechanism M 6  is attachable to the casing  411  of the slot machine  1  by screwing. With this, the reel device M 1  is arranged such that each reel unit M 11  is replaced or mounted as the reel supporting mechanism M 6  is attached to or detached from the casing  411  of the slot machine  1 . 
     Each reel unit M 11  has the reel M 3  having the outer circumferential surface on which the symbols are arranged. The reel M 3  includes an annular reel strip M 32  on which one or more symbol is arranged and a reel frame M 31  in which the reel strip M 32  is provided at the outer circumferential surface. The reel frame M 31  has, at a left end portion on the inner circumferential side, a blade mechanism M 4  which generates air flow by rotation. Furthermore, as shown in  FIG. 63 , the reel frame M 31  has, at a central part of the right edge, a reel motor M 51  constituted by a stepping motor which rotationally drives the reel M 3 . The reel strip M 32  supported by the reel frame M 31  is made of a material such as acrylic resin which allows illumination light to pass through. 
     On the inner circumferential side of the reel M 3 , a backlight unit M 7  is provided. The backlight unit M 7  outputs illumination light from the inner circumferential side of the reel M 3  toward the reel strip M 32 , and the illumination light having passed the reel strip M 32  is viewable from the outside of the slot machine  1 . 
     (Device Main Body  4 : Game Mechanism Device  41 : Main Body Substrate Casing N 1 ) 
     Behind the reel device M 1 , as shown in  FIG. 64 , a main body substrate casing N 1  is provided. As shown in  FIG. 65 , the main body substrate casing N 1  is formed to be rectangular when viewed from the front side, and is fixed such that the back wall thereof is screwed to the back wall of the casing  411 . The main body substrate casing N 1  includes a casing main body N 2  which is open at the front and a lid N 3  which is formed to cover the front side of the casing main body N 2 . 
     The lid N 3  is rotatably supported at the lower end portions of the left side wall and the right side wall of the casing main body N 2 . With this, as shown in  FIG. 66 , the lid N 3  is openable in the forward/backward direction about the lower end portions, with the upper end portion with respect to the casing main body N 2  being a free end whereas the lower end portion with respect to the casing main body being a fixed end. At an upper central portion of the lid N 3 , a through hole N 3   a  is formed. The through hole N 3   a  is sized to allow a finger to be inserted therein, and is used by the operator to open or close the lid N 3  with respect to the casing main body N 2 . 
     A screw hole N 3   b  is formed to be horizontally adjacent to the through hole N 3   a  in the lid N 3 . The screw hole N 3   b  is disposed to oppose a fastening hole N 2   a  formed in the front surface of the casing main body N 2  when the lid N 3  is closed. As the screw hole N 3   b  is screwed to the fastening hole N 2   a , the state that the casing main body N 2  is closed by the lid N 3  is maintained. When the screw hole N 3   b  is unscrewed from the fastening hole N 2   a , the lid N 3  is opened with respect to the casing main body N 2 . At an upper portion of the right edge of the lid N 3 , a positioning hole N 3   c  is formed. Into the positioning hole N 3   c , a protruding piece N 2   b  formed at an upper portion of the right edge of the casing main body N 2  is inserted. 
     Through each of the right side wall and the left side wall of the casing main body N 2 , cable insertion holes N 2   c  are formed at three positions which are lined up in the vertical direction. Each of the cable insertion holes N 2   c  is formed by fitting a wire protecting bush into a concave notch formed at the side wall of the casing main body N 2 . Into each cable insertion hole N 2   c , a not-shown signal cable wired in the slot machine  1  is inserted. In the main body substrate casing N 1 , a first GM substrate GM 1  and a second GM substrate GM 2  are provided. The first GM substrate GM 1  and the second GM substrate GM 2  will be detailed later. 
     In the main body substrate casing N 1  arranged as above, as shown in  FIG. 67 , the operator cannot access the first GM substrate GM 1  and the second GM substrate GM 2  unless an operation to open the upper door device  42  (a condition), an operation to remove the reel device M 1  from the casing  411  (another condition), and an operation to open the lid N 3  from the casing main body N 2  by unscrewing (a further condition) are done. 
     In addition to the above, to be adjacent to the protruding piece N 2   b  in the casing main body N 2 , a main body substrate casing switch SE 6  is provided. The main body substrate casing switch SE 6  is provided to be able to contact with the lid N 3 , and is turned on when the lid N 3  is closed and is turned off when the lid N 3  is opened. 
     (Device Main Body  4 : Radiation Mechanism R) 
     As shown in  FIG. 72 , the slot machine  1  includes the radiation mechanism R. The radiation mechanism R includes a first passage (security cage cooling mechanism R 2 ) through which air heated by the heat of the CPU is exhausted, a second passage (power source cooling mechanism R 1 ) through which air heated by the heat of the power source device is exhausted, and an exhaust port which communicates with the first passage and the second passage to exhaust air therefrom. Because in the radiation mechanism R the first passage and the second passage share a single exhaust port, the temperature distribution is uniform and the surrounding devices can be laid out in consideration of the reduction of influences on the surrounding devices. 
     To be more specific, the radiation mechanism R includes the power source cooling mechanism R 1  and the security cage cooling mechanism R 2 . The power source cooling mechanism R 1  is arranged to cool the inside of the power source box R 11  by the external air. The security cage cooling mechanism R 2  is arranged to cool the inside of the security cage SK by the external air. The radiation mechanism R includes an exhaust heat chamber R 152  which simultaneously stores exhaust heat (air) exhausted after the inside of the power source box R 11  is cooled by the power source cooling mechanism R 1  and exhaust heat (air) exhausted after the inside of the security cage SK is cooled by the security cage cooling mechanism R 2 , and is arranged to exhaust the heat (air) from the exhaust heat chamber R 152  to the side of the casing  411  by the exhaust fan R 12 . 
     (Device Main Body  4 : Radiation Mechanism R: Power Source Cooling Mechanism R 1 ) 
     The power source cooling mechanism R 1  constituting the radiation mechanism R will be detailed. As shown in  FIG. 68 , the power source cooling mechanism R 1  is disposed at a lower left end portion of the casing  411 . The power source cooling mechanism R 1  is spatially isolated in the casing  411  so that the air flowing in the power source cooling mechanism R 1  do not flow out to other parts in the casing  411 . 
     To be more specific, the power source cooling mechanism R 1  includes a power source box R 11  which is provided at a lower left end portion of the casing  411 . The power source box R 11  is a rectangular parallelepiped box which is open at the left side, and forms an internal space with the left side wall thereof being the left side wall of the casing  411 . In the internal space of the power source box R 11 , an not-shown power source device is provided. The power source box R 11  and the power source device constitute a power source unit RU. 
     The power source unit RU includes a first temperature sensor and a second temperature sensor. The first temperature sensor outputs, to the second GM substrate GM 2 , a first power source temperature detection signal which is turned on at a temperature not lower than a first threshold temperature and is turned off at a temperature not higher than a second threshold temperature. The second temperature sensor outputs a second power source temperature detection signal which is turned on at a temperature not lower than a third threshold temperature. The second power source temperature detection signal is used by the power source unit RU to manage the temperature of itself. The power supply to the power source unit RU is forcibly shut down when the second power source temperature detection signal is turned on. The first temperature sensor and the second temperature sensor may be provided in the power source box R 11  to indirectly detect the temperature of the power source device with reference to the temperature in the power source box R 11 , or may be provided in the power source device to directly detect the temperature of the power source device. 
     On the front wall of the power source box R 11 , a power source fan R 111  is provided to send the air on the front side (sucking side) into the power source box R 11 . The power source fan R 111  is provided with a power source box fan sensor FNS 1 . The power source box fan sensor FNS 1  detects the temperature of the power source box R 11  and outputs a power source box temperature signal. In the meanwhile, a plurality of ventilation holes R 11   a  are made through the back wall of the power source box R 11 . With this, after sending the air on the front side into the internal space and cooling the not-shown power source device, the power source box R 11  exhausts, through the ventilation holes R 11   a , the air which has been heated due to the heat exchange with the power source device. 
     In front of the power source fan R 111 , an opening R 13   a  of the support member R 13  supporting the casing  411  is formed. The support member R 13  is provided to cover the inner wall surface of the entire left end portion of the front wall of the casing  411 , and the support member R 13  and the left end portion of the casing  411  form a first passage R 14 . At a lower left end portion of the front wall of the casing  411 , a plurality of air holes  411   k  are formed. With this, the first passage R 14  is arranged in such a way that, as the air in the first passage R 14  is supplied into the power source box R 11  by the power source fan R 111 , the air pressure in the passage R 14  becomes lower than the external air pressure, with the result that the outside air flows into the passage R 14  through the air holes  411   k.    
     As shown ion  FIG. 69 , the power source box R 11  is disposed to be distant from the back wall of the casing  411 . At the right side wall on the back side of the power source box R 11 , a fan support member R 15  is provided. As shown in  FIG. 70  and  FIG. 71 , the fan support member R 15  includes a plate member R 151  which extends from the bottom portion of the casing  411  to a position higher than the power source box R 11  and an exhaust heat chamber R 152  formed at an upper end portion of the plate member R 151 . The plate member R 151  is joined with the back wall of the casing  411  at a part extending between the upper and lower ends of the back side, so as to be a right side surface of the gap between the power source box R 11  and the back wall of the casing  411 . With this, as shown in  FIG. 69 , the gap behind the power source box R 11  is spatially defined by the side wall and the back wall of the casing  411  and the plate member R 151 , so that a second passage R 16  extending in the vertical direction is formed. 
     At the exhaust heat chamber R 152  of the fan support member R 15 , an exhaust fan R 12  is provided. The exhaust fan R 12  is arranged to exhaust the air in the second passage R 16  through the air hole  411   i  of the casing  411 . The second passage R 16  causes the air sent out from the ventilation hole R 1  is of the power source box R 11  by the power source fan R 111  to move upward as it is sucked by the static pressure of the exhaust fan R 12 , so as to pass the exhaust heat chamber R 152  and reach the exhaust fan R 12 . 
     With this, the power source cooling mechanism R 1  performs an operation of sucking the outside air through the air hole  411   k  by the static pressure of the power source fan R 111  and sending the air into the power source box R 11  in the first passage R 14  which is the sucking side of the power source box R 11 , and performs an operation of exhausting the air to the outside through the air hole  411   i  by the exhaust pressure of the power source fan R 111  and the static pressure of the exhaust fan R 12  in the second passage R 16  which is the exhaust side of the power source box R 11 . As such, because the power source cooling mechanism R 1  is provided to be isolated from the other components in the casing  411 , the power source device is effectively cooled in the power source box R 11  by a rapid air flow, without allowing the other components in the casing  411  to be heated by the air heated on account of heat exchange. 
     (Device Main Body  4 : Radiation Mechanism R: Security Cage Cooling Mechanism R 2 ) 
     The security cage cooling mechanism R 2  constituting the radiation mechanism R will be detailed. The security cage cooling mechanism R 2  is a mechanism for cooling the air inside the security cage SK by taking in the outside air from the both sides of the casing  411  and letting the air taken in to flow into the security cage SK from the above to generate a forced convection. That is, the shelf board member R 21  is formed in a hollow shape so as to serve, in addition to serve as a shelf board, as an air intake duct communicating the both ends of the casing  411  with the security cage SK, the security cage cooling mechanism R 2 . The security cage cooling mechanism R 2  uses the negative pressure generated by the CPU cooling fan CF to directly take in the external air and cool the security cage SK. 
     It should be noted that, although the security cage SK is detailed later, the security cage SK has an opening SK 1   a  in a middle portion of the top surface, and a plurality of through holes SK 2   a  and SK 2   b  on the left side surface and the right side surface, and uses the internally disposed CPU cooling fan CF to take in the air through the opening SK 1   a  and ventilate the air from the through holes SK 2   a  and SK 2   b , as shown in  FIG. 78 . 
     (Device Main Body  4 : Security Cage Cooling Mechanism R 2 : Shelf Board Member R 21 ) 
     As shown in  FIG. 72 , the security cage cooling mechanism R 2  has the shelf board member R 21  parting the middle space  41 B and the bottom space  41 C from each other. The shelf board member R 21  has a top surface member R 211  and an under surface member R 212 , as shown in  FIG. 75 . The top surface member R 211  has a through hole R 211  in its left end portion. The through hole R 211   a  communicates the middle space  41 B with the bottom space  41 C, and is used for a peephole to enable visual confirmation of the exhaust fan R 12  and the like at a time of maintenance, while enabling to wire therethrough signal cables and the like. Further, as shown in  FIG. 76 , there is an air passage hole R 212   a  formed in a middle portion of the under surface member R 212 . As is also shown in  FIG. 77 , the top surface member R 211  and the under surface member R 212  are combined with each other relative to the vertical directions to form the shelf board member R 21  with openings R 21   a  on its left end surface and right end surface. It should be noted that one of the openings R 21   a  leads to an air intake hole  411   e  shown in  FIG. 57 . The other one of the openings R 21   a  leads to an air intake hole  411   i  shown in  FIG. 28 . 
     The shelf board member R 21  with the structure detailed above is horizontally disposed and supports a printer device PR with its top surface, as shown in  FIG. 72 . Further, the shelf board member R 21  has its right end portion jointed to the right side wall of the casing  411 , and its left end portion jointed to the left side wall of the casing  411 . The openings on the left end surface and the right end surface of the shelf board member R 21  are uncovered. This way, the internal space of the shelf board member R 21  communicates with the outside. 
     To the middle portion on the under surface of the shelf board member R 21  is provided the security cage SK. As shown in  FIG. 73 , the air passage hole R 212   a  of the shelf board member R 21  and the opening SK 1   a  of the security cage SK are positioned to each other so that the inside of the security cage SK is in communication with the outside on the right side and left side of the casing  411 , through a hollow portion of the shelf board member R 21 . 
     The shelf board member R 21  supports the security cage SK so that the security cage SK is positioned beside the exhaust fan R 12 . As shown in  FIG. 74A , a through hole SK 2   b  formed on the left side surface of the security cage SK is in communication with the outside via a penetration member R 153  and the exhaust fan R 12 . Further, a through hole SK 2   a  formed on the right side surface of the security cage SK leads to the inside the casing  411 . Thus, the security cage SK is structured so that the air therein is forced out through the through hole SK 2   b  by the exhaust fan R 12 . 
     With the security cage cooling mechanism R 2  with the structure as described above, the air nearby the left side wall and the right side wall of the shelf board member R 21  is taken into the hollow portion of the shelf board member R 21  by the CPU cooling fan CF (see  FIG. 74B  and  FIG. 74C ) inside and the exhaust fan R 12 . The air taken in then flows into the security cage SK through the air passage hole R 212   a  (opening SK 1   a ) in the middle portion. After cooling various electric components in the security cage SK, the air taken in is ventilated through the through hole SK 2   b , and forced out by the exhaust fan R 12  after being merged with the air from the power source cooling mechanism R 1  in the exhaust heat chamber R 152 . The ventilating performance of the exhaust fan R 12  is set higher than the intake performance of the CPU cooling fan CF. Therefore, the air inside the casing  411  flows through the through hole SK 2   a  formed on the right side surface of the security cage SK. Thus, the electronic components in the security cage SK are cooled by the air inside the casing  411 . 
     (Device Main Body  4 : Security Cage SK) 
     The security cage SK is provided to the under surface of the shelf board member R 21 , as shown in  FIG. 78 . The security cage SK has a top wall member SK 1 , a main body wall member SK 2 , and a security cage door SK 3 . The top wall member SK 1  has the opening SK 1   a  in position corresponding to the air passage hole R 212   a  of the shelf board member R 21 . The opening SK 1   a  is positioned above the CPU cooling fan CF, as shown in  FIG. 74B  and  FIG. 74C . The CPU cooling fan CF takes in the air from the opening SK 1   a  for the not-shown CPU on the APX motherboard AM, and cools the CPU by blowing the air to the CPU. To the left side portion and the right side portion of the top wall member SK 1  are formed step portions Skb 1 . These step portions Skb 1  protrude in the horizontal direction from a high position but lower than the top surface, and difference in the levelling is relative to the vertical direction is greater than the thickness of the plate constituting the main body wall member SK 2 . 
     Further, the top wall member SK 1  has an engagement hole portion SK 1   c  at the center of its front portion, as shown in  FIG. 79 . The engagement hole portion SK 1   c  has a bent piece whose front end portion extends downward. Further, the top wall member SK 1  has an engagement protrusion portion SK 1   d  at its front end portion. The engagement protrusion portion SK 1   d  protrudes forward at a position lower than the top surface, and has a protruding piece SK 1   e  at its right end portion. The protruding piece SK 1   e  is used for positioning at the time of closing the security cage door SK 3 . The top wall member SK 1  further has a sensor abutting portion SK 1   f  on the right side of its back side portion. The sensor abutting portion SK 1   f  is formed by bending a part of the top wall downward, and detects whether or not the security cage SK is properly mounted. Such a top wall member SK 1  with the structure described above is attachable to the under surface of the shelf board member R 21  with a use of a screw. 
     The main body wall member SK 2  has a side surface wall portions SK 21  and SK 22  which are side surfaces on the left and right, a back surface wall portion SK 23  which is the back surface, and a bottom surface wall portion SK 24  which is the under surface. To the side surface wall portions SK 21  and SK 22  are formed through holes SK 2   a  and SK 2   b . Further, the upper side portions of the side surface wall portions SK 21  and SK 22  are bent inwardly to enable engagement with the step portions Skb 1  of the top wall member SK 1 . Thus, as shown in  FIG. 80  and  FIG. 81 , the security cage SK is attachable to the shelf board member R 21  by attaching the top wall member SK 1  to the under surface of the shelf board member R 21 , engaging the upper side portion of the side surface wall portions SK 21  and SK 22  of the main body wall member SK 2  with the step portions Skb 1  of the top wall member SK 1 , and sliding the main body wall member SK 2  toward back. 
     Further, as shown in  FIG. 79 , at the lower front side of the bottom surface wall portion SK 24  is formed a step portion SK 24   a . On the top surface of the step portion SK 24   a  are provided two bundling members SK 4 . These bundling members SK 4  enable drawing outside a plurality of signal cables in the security cage SK, in bundles. 
     The security cage door SK 3  has lower wall portion SK 31  having a C-shaped cross section, an uprising portion SK 32  extending upward from the rear end portion of the lower wall portion SK 31 . The lower wall portion SK 31  is formed so that there is a gap on the both left and right end portions; i.e., between the lower wall portion SK 31  and the side surface wall portions SK 21  and SK 22  of the main body wall member SK 2 . The gap on the right end portion of the lower wall portion SK 31  is sealed by a sealing member SK 33 . The gap on the right end portion of the lower wall portion SK 31  is opened so as to enable drawing out of the signal cables bundled by the bundling members SK 4 . 
     Further, the lower end portion of the lower wall portion SK 31  is rotatably supported by the side surface wall portions SK 21  and SK 22  of the main body wall member SK 2 . Namely with the lower end portion of the security cage door SK 3  serving as the rotation axis and the upper end portion serving as the free end, the security cage door SK 3  is able to swing in forward/backward directions. In other words, the security cage SK is opened by pulling forward the upper end portion of the security cage door SK 3 , and closed by pushing backward the upper end portion of the security cage door SK 3 . 
     The uprising portion SK 32  of the security cage door SK 3  extends from the right end of the security cage door SK 3  towards left end, to a midway portion of the security cage door SK 3 . In the upper right end portion of the uprising portion SK 32  is formed a through hole SK 32   b . The through hole SK 32   b  enables insertion of the protruding piece SK 1   e  of the top wall member SK 1 . The uprising portion SK 32  has a key hole SK 32   a . To the key hole SK 32   a  is attached a key cylinder SK 5  and exposes a key unit SK 5   a  to the front. To a cylinder portion SK 5   b  of the key cylinder SK 5  is provided a plate member SK 6 . The plate member SK 6  is formed in a rectangular shape. When the cylinder portion SK 5   b  is rotated and the plate member SK 6  matches with the vertical direction, the plate member SK 6  engages with the engagement hole portion SK 1   c  of the top wall member SK 1 . This way, the security cage door SK 3  in the closed state is locked. Meanwhile, when the cylinder portion SK 5   b  is rotated and the plate member SK 6  matches with the horizontal direction, the plate member SK 6  disengages from the engagement hole portion SK 1   c  of the top wall member SK 1 . This unlocks the security cage door SK 3 . 
     The security cage door SK 3  is formed in such a manner that the upper left corner area SK 7   a  of a connector attachment plate SK 7  is exposed on the left side of the uprising portion SK 32 . Thus, when the security cage door SK 3  of the security cage SK is closed, a main area SK 7   b  is covered by the security cage door SK 3  except for the upper left corner area SK 7   a  of the connector attachment plate SK 7 , as shown in  FIG. 82 . Meanwhile, when the security cage door SK 3  of the security cage SK is opened, the upper left corner area SK 7   a  of the connector attachment plate SK 7  and the main area SK 7   b  are exposed to the outside, as shown in  FIG. 83 . On the connector attachment plate SK 7 , the upper left corner area SK 7   a  and the main area SK 7   b  are parted from each other by a partition plate SK 73 . The partition plate SK 73  protrudes forward, and covers the main area SK 7   b  completely from the outside, when the security cage door SK 3  is closed. 
     (Device Main Body  4 : Security Cage SK: Connector Attachment Plate SK 7 ) 
     As shown in  FIG. 84 , in the upper left corner area SK 7   a  of the connector attachment plate SK 7 , a connector SK 71  for power supply is provided and a connector attaching hole SK 7   a   1  is formed. To the connector SK 71  for power supply is connected a power supply cable, and power is supplied from a power source device provided in the power source box R 11  shown in  FIG. 69 . 
     Further, in the middle portion at the upper end of the connector attachment plate SK 7  is formed a notch SK 7   b   1 . The notch SK 7   b   1  is formed so that a key cylinder SK 5  is inserted therethrough. In the main area SK 7   b  of the connector attachment plate SK 7  is provided a connector gathered panel SK 8 . The connector gathered panel SK 8  is disposed below the upper left corner area SK 7   a  and the notch SK 7   b   1 . 
     In a lower left corner portion of the connector gathered panel SK 8  is a keyboard connector SK 81 . Above the keyboard connector SK 81  are two USB connectors; i.e., a first USB connector SK 82   a  and a second USB connector SK 82   b . The USB connectors SK 82   a  and SK 82   b  are aligned serially in the vertical direction. On the right side of the keyboard connector SK 81  is a 30-pin DVI port connector SK 83 . Above the DVI port connector SK 83  is a 9-pin D-Sub connector SK 84 . On the right side of the DVI port connector SK 83  are two display port connectors; i.e., a first display port connector SK 85   a  and a second display port connector SK 85   b . The display port connectors SK 85   a  and SK 85   b  are serially aligned in the left/right direction. 
     Above the display port connectors SK 85   a  and SK 85   b  is a 9-pin D-Sub connector SK 86 . On the right side of the second display port connector SK 85   b  are two USB connectors; i.e., a third USB connector SK 88   a  and a fourth USB connector SK 88   b . The USB connectors SK 88   a  and SK 88   b  are aligned serially in the vertical direction. Above the fourth USB connector SK 88   b  is a LAN jack SK 87 . 
     On the right side of the USB connectors SK 88   a  and SK 88   b  and the LAN jack SK 87  are two optical signal connectors; i.e., a first optical signal connector SK 89   a  and a second optical signal connector SK 89   b . The optical signal connectors SK 89   a  and SK 89   b  are aligned serially in the vertical direction. On the right side of the optical signal connectors SK 89   a  and SK 89   b  are serially aligned, in the vertical direction, two USB connectors; i.e., a fifth USB connector SK 90   a  and a sixth USB connector SK 90   b , and a LAN jack SK 91  Between the connector gathered panel SK 8  and the key cylinder SK 5  is a 9-pin D-Sub connectors; i.e., first D-Sub connector SK 72   a  and a second D-Sub connector SK 72   b.    
     On the right side of the connector gathered panel SK 8  is formed a lower side through hole SK 7   b   2 . Above the lower side through hole SK 7   b   2  is formed an upper side through hole SK 7   b   3 . The upper side through hole SK 7   b   3  is provided with a cage open/close detection mechanism SK 10 . On the right side of the lower side through hole SK 7   b   2  and the upper side through hole SK 7   b   3  is a GAL mechanism G. On the right side of the GAL mechanism G is disposed an SSD mechanism SD. 
     (Device Main Body  4 : Security Cage SK: Cage Open/Close Detection Mechanism SK 10 ) 
     The cage open/close detection mechanism SK 10  includes a long sensor support member SK 101 , as shown in  FIG. 85 . The length direction of the sensor support member SK 101  matches with the forward/backward direction, and the front end portion is fastened with a screw inserted into the upper side through hole SK 7   b   3 , while the rear end portion is screw fastened to the back surface wall portion SK 23 . The sensor support member SK 101  has its both ends relative to the left/right direction bent upward. On top surface of the sensor support member SK 101  is moveably provided a slide member SK 102 . The movements of the slide member SK 102  is restricted to the forward/backward directions by the both ends of the sensor support member SK 101  which are bent upward. Further, the slide member SK 102  has a long hole SK 24   a  at its front end portion and rear end portion. The long hole SK 24   a  is elongated in the forward/backward direction. The movable distance of the slide member SK 102  relative to the forward/backward direction is restricted with a screw inserted in the long hole SK 24   a.    
     The slide member SK 102  and the sensor support member SK 101  are connected by a not-shown spring member. The spring member biases the slide member SK 102  in the forward direction to the sensor support member SK 101 . The front end portion of the slide member SK 102  projects towards the security cage door SK 3 , and is capable of abutting the security cage door SK 3 . With this, when the security cage door SK 3  is closed, the security cage door SK 3  pushes the slide member SK 102  towards back side. Meanwhile, when the security cage door SK 3  is opened, the spring member biases the slide member SK 102  toward front side. 
     In the rear end portion of the slide member SK 102  is provided a first sensor SK 103  of a contact type. The first sensor SK 103  is disposed so as to be capable of monitoring the back side, and is configured to sense abutting of the slide member SK 102  to the front surface of the sensor abutting portion SK 1   f  of the top wall member SK 1 . On the back surface of the sensor abutting portion SK 1   f  is a second sensor SK 104 . The second sensor SK 104  is disposed so as to be capable of monitoring the front side, and is configured to sense abutting of the slide member SK 102  to an abutting portion SK 103   a  of the first sensor SK 103 . 
     The first sensor SK 103  and the second sensor SK 104  functions as a security door switch. The sensor enters a sensing-state when the security cage door SK 3  is closed, pushing backwards the slide member SK 102 , and enters a non-sensing state when the security cage door SK 3  is opened and the slide member SK 102  moves forward. Thus, the cage open/close detection mechanism SK 10  adopts double sensing-process by the first sensor SK 103  and the second sensor SK 104 , to monitor and confirm the open/close state of the security cage door SK 3 . Further, when the top wall member SK 1  is opened, the second sensor SK 104  does not abut the abutting portion SK 103   a , and the first sensor SK 103  does not abut the front surface of the sensor abutting portion SK 1   f . Further, when the top wall member SK 1  is opened, the second sensor SK 104  does not abut the abutting portion SK 103   a , and the first sensor SK 103  does not abut the front surface of the sensor abutting portion SK 1   f . It is therefore possible with the first sensor SK 103  and the second sensor SK 104  to confirm and monitor not only the open/close state of the security cage door SK 3 , but also the open/close state of the top wall member SK 1 . 
     (Device Main Body  4 : Security Cage SK: SSD (Solid State Drive) Mechanism SD) 
     As shown in  FIG. 86 , the SSD mechanism SD is disposed in the right end portion of the connector attachment plate SK 7 . The SSD mechanism SD is structured by making an SSD into a cartridge, and attachable and detachable to and from the APX motherboard AM. It should be noted that the SSD has a size which is a half of a 2.5 inch SSD, and adopts a connector in which a power source line and a signal line are integrated. Specifically, the SSD mechanism SD includes: an SSD device SD 1  which is an SSD in the form of cartridge, and an SSD mounting device SD 3  provided to the connector attachment plate SK 7 , to which device the SSD device SD 1  is detachably mounted. 
     (Device Main Body  4 : Security Cage SK: SSD Mechanism SD: SSD Device SD 1 ) 
     As shown in  FIG. 87 , the SSD device SD 1  includes: an SSD casing SD 11  that can be divided into two in the left/right direction, and an SSD substrate SD 2  accommodated and held in the SSD casing SD 11 . As shown in  FIG. 88 , the SSD substrate SD 2  includes: a flash memory SD 22 , and a memory controller configured to manage the flash memory SD 22 . It should be noted that, as the recording mode, the SSD substrate SD 2  may adopt an MLC (Multi-Level Cell) mode or an SLC (Single Level Cell) mode. 
     The SSD substrate SD 2  is formed in the form of rectangular plate, and has a connector unit SD 21  at its rear end portion. The connector unit SD 21  has a connector formed in compliance with the SATA standard, and enables access to the flash memory SD 22  from the outside, under control of the memory controller SD 23 . The SSD substrate SD 2  has on its left surface and the right surface a protruding portion SD 24  which is formed in such a manner as to surround the connector unit SD 21 . 
     The SSD substrate SD 2  described above is accommodated in the SSD casing SD 11 . The outline of the SSD casing SD 11 , formed by connecting the corner portions, is formed in a rectangular shape. In the back portion which is on the mount side of the SSD casing SD 11  is formed a recess SD 11   a . On the recess SD 11   a , the connector unit SD 21  of the SSD substrate SD 2  is exposed. 
     The SSD casing SD 11  includes: a first SSD casing member SD 111  mainly covering the left side of the SSD substrate SD 2 , and a second SSD casing member SD 112  mainly covering the right side of the SSD substrate SD 2 . The first SSD casing member SD 111  has a side surface portion SD 111   a  to face the left surface of the SSD substrate SD 2 , and a front surface portion SD 111   b , a top surface portion SD 111   c , a low surface portion SD 111   d  formed to surround the GAL substrate SD 2 , and a back surface portion SD 111   e  abutting the protruding portion SD 24  on the left surface of the SSD substrate SD 2 . 
     In the upper front end portion and the lower front end portion of the side surface portion SD 111   a  are formed protruding portions SD 111   e  and SD 111   f . The protruding portions SD 111   e  and SD 111   f  are each formed to abut the left surface of the cased SSD substrate SD 2 . In the middle portion of each of the top surface portion SD 111   c  and the low surface portion SD 111   d  is formed an engagement protrusion portions SD 111   g  and SD 111   h . The engagement protrusion portions SD 111   g  and SD 111   h  are disposed to face each other, and their leading end portions are bent inwardly in a hook-like manner. 
     On the other hand, the second SSD casing member SD 112  is disposed to face the first SSD casing member SD 111 , over the SSD substrate SD 2 . The second SSD casing member SD 112  has a side surface portion SD 112   a  to face the right surface of the SSD substrate SD 2 , and a front surface portion SD 112   b , a top surface portion SD 112   c , a low surface portion SD 112   d  formed to surround the GAL substrate SD 2 , and a back surface portion SD 112   e  abutting the protruding portion SD 24  on the right surface of the SSD substrate SD 2 . Inner side portions at the leading ends of the front surface portion SD 112   b , the top surface portion SD 112   c , and the low surface portion SD 112   d  are formed to fit with the inner side portions of the leading end portions of the front surface portion SD 112   b , the top surface portion SD 112   c , and the low surface portion SD 112   d  of the first SSD casing member SD 111 , respectively. 
     In the upper front end portion and the front side end portion of the side surface portion SD 112   a  are formed not-shown protruding portions. The protruding portions are each formed to abut the right surface of the cased SSD substrate SD 2 . Thus, the SSD casing SD 11  is structured so as to sandwich the upper end portion on the front side and the front side end portion of the SSD substrate SD 2  between the protruding portions SD 111   e  and SD 111   f  of the first SSD casing member SD 111  and the protruding portions of the second SSD casing member SD 112 , while sandwiching the protruding portion SD 24  of the SSD substrate SD 2  between the back surface portions SD 111   j  and SD 112   e , thus maintain the casing state of the casing main body N 2 . 
     In the middle portion of each of the top surface portion SD 112   c  and the low surface portion SD 112   d  of the second SSD casing member SD 112  is formed an engagement recess portions SD 112   g  and SD 112   h . The engagement recess portions SD 112   g  and SD 112   h  are formed so as to engage with the engagement protrusion portions SD 111   g  and SD 111   h  of the first SSD casing member SD 111 , when the first SSD casing member SD 111  and the second SSD casing member SD 112  are abutted to each other and assembled into one piece as the SSD casing SD 11 . With the above structure, the SSD casing SD 11  is able to maintain its assembled state in one piece, without a need for screw-fastening the casing members SD 111  and SD 112 . 
     Further, in the upper front end portion and the lower back end portion on the right surface of the side surface portion SD 112   a  is formed a protruding portions SD 112   i . These protruding portions SD 112   i  are disposed on one side to indicate the vertical direction of the SSD device SD 1 , while facilitating positioning of the SSD device SD 1  at the time of mounting to the SSD mounting device SD 3 . 
     (Device Main Body  4 : Security Cage SK: SSD Mechanism SD: SSD Mounting Device SD 3 ) 
     As shown in  FIG. 89 , the SSD mounting device SD 3  includes: an SSD guide member SD 31  that can be divided into two in the left/right direction, and a connector member SD 32  held by the SSD guide member SD 31 . The connector member SD 32  has a rectangular parallelepiped connector main unit SD 321 . The length direction of the connector main unit SD 321  is set in the vertical direction, and a fitting portions SD 321   a  for screw-fastening is provided in the upper end portion and the lower end portion. 
     Further, the connector main unit SD 321  has a connector units SD 322  and SD 323  disposed on the front end surface and the back end surface. The connector units SD 322  and SD 323  are formed in compliance with the SATA standard. The pins of the connector units SD 322  and SD 323  on both sides are electrically connected to each other. The connector unit SD 322  on the front side is connected to the connector unit SD 21  of the SSD substrate SD 2 . 
     The connector member SD 32  described above is held by the SSD guide member SD 31 . The SSD guide member SD 31  includes: a first guide member SD 311 , and a second guide member SD 312 . The first guide member SD 311  includes: a side surface guide member SD 3111  in the form of a plane, a top surface guide member SD 3112  extending rightward from the upper side of the side surface guide member SD 3111 , i.e., towards the second guide member SD 312 , a low surface guide member SD 3113  extending rightward, from the lower side of the side surface guide member SD 3111 , a front surface abutting portion SD 3114  extending, from the front side of the side surface guide member SD 3111 , in a direction away from the second guide member SD 312  (leftward), and a connector fixing portion SD 3115  protruding backward from the back side of the side surface guide member SD 3111 . 
     In the front end portions of the top surface guide member SD 3112  and the low surface guide member SD 3113  are formed screw-fasten portions SD 3112   a  and SD 3113   a . As shown in FIG.  FIG. 91A , the screw-fasten portions SD 3112   a  and SD 3113   a  abut the back surface of the connector attachment plate SK 7 , and screw-fastened to fix the SSD mounting device SD 3  to the connector attachment plate SK 7 . As shown in  FIG. 89 , on a side of the screw-fasten portions SD 3112   a  and SD 3113   a  are formed engagement notch portions SD 3112   b  and SD 3113   b  for use in positioning the second guide member SD 312 . Further, in the upper end portion and the lower end portion of the connector fixing portion SD 3115  are formed screw holes SD 3115   a.    
     Meanwhile, the second guide member SD 312  includes: a side surface guide member SD 3121 , a front surface abutting portion SD 3122  extending, from the front side of the side surface guide member SD 3121 , in a direction away from the first guide member SD 311  (rightward), and a connector fixing portion SD 3123  protruding backward from the back side of the side surface guide member SD 3121 . In the upper end portion and the lower end portion of the side surface guide member SD 3121  are formed protruding portions SD 3121   a . The protruding portions SD 3121   a  are configured to engage with the engagement notch portions SD 3112   b  and SD 3113   b  of the SSD guide member SD 31 . 
     Further, to the side surface guide member SD 3121  is formed a notch portion SD 3121   b . The notch portion SD 3121   b  extends from the front end of the side surface guide member SD 3121  towards back portion. The notch portion SD 3121   b  is formed so as to engage with a protruding portion SD 112   i  of the SSD device SD 1  shown in  FIG. 87 . This is for preventing insertion of the SSD device SD 1  upside down. Further, the rear end portion of the side surface guide member SD 3121  is set at a position that realizes an appropriate insertion depth to ensure sufficient electric connection, while the protruding portion SD 112   i  of the SSD device SD 1  abuts the rear end portion. This facilitates prevention of problems attributed to insufficient insertion of the SSD device SD 1 . Further, in the upper end portion and the lower end portion of the connector fixing portion SD 3123  are formed screw holes SD 3121   a.    
     The SSD guide member SD 31  and the connector member SD 32  forms the integrated SSD mounting device SD 3  by: having the engagement notch portions SD 3112   b  and SD 3113   b  of the first guide member SD 311  with the protruding portions SD 3121   a  of the second guide member SD 312  to assemble the first guide member SD 311  and the second guide member SD 312 ; inserting the connector member SD 32  between the connector fixing portions SD 3115  and SD 3123 , and screw-fastening them by using the screw holes SD 3121   a  and SD 3115   a , and the fitting portions SD 321   a.    
     As shown in  FIG. 86 , with the SSD mounting device SD 3  thus assembled being attached to the back surface side of the connector attachment plate SK 7 , there is formed to the connector attachment plate SK 7  an SSD insertion hole SD 4  for inserting thereinto the SSD device SD 1 . Thus, with the SSD mounting device SD, the SSD device SD 1  is detachably mounted to the SSD insertion hole SD 4 , as shown in  FIG. 90 . Further, with the SSD substrate SD 2  being cased in the SSD casing SD 11  to be formed into a cartridge, replacement of the SSD substrate SD 2  and updating of programs and data are made easy. It should be noted that the attachment and detachment of the SSD mounting device SD 3  is monitored by the APX motherboard AM, and an alarm sound is output when the SSD mounting device SD 3  is detached. 
     (Device Main Body  4 : Security Cage SK: GAL Mechanism G) 
     As shown in  FIG. 91A , a GAL mechanism G is disposed on the left side of the SSD device SD 1 . As shown in  FIG. 92 , the GAL mechanism G includes: a GAL device G 1  formed in the form of cartridge, a GAL mounting device G 2  that enables the GAL device G 1  to be detachably mounted, and a GAL support plate G 3  supporting the GAL mounting device G 2 . 
     (Device Main Body  4 : Security Cage SK: GAL Mechanism G: GAL Device G 1 ) 
     As shown in  FIG. 93 , the GAL device G 1  includes: a GAL casing G 11  that can be divided into two in the left/right direction, and a GAL substrate G 4  accommodated and held in the GAL casing G 11 . On the GAL substrate G 4  is implemented a CPLD (Complex Programmable Logic Device) circuit and a constant voltage circuit. The GAL substrate G 4  is formed in the form of rectangular plate, and has a male connector unit G 41  at on the right surface of its rear end portion. The connector unit SD 41  is electrically connected to the CPLD circuit and the constant voltage circuit. Further, the GAL substrate G 4  has a through hole G 4   a  on its upper front end portion. 
     The GAL substrate G 4  described above is accommodated in the GAL casing G 11 . The outline of the GAL casing G 11 , formed by connecting the corner portions, is formed in a rectangular shape. On the back portion which is on the mount side of the GAL casing G 11  is exposed the connector unit G 41 . The GAL casing G 11  includes: a first GAL casing member G 111  mainly covering the left side of the GAL substrate G 4 , and a second GAL casing member G 112  mainly covering the right side of the GAL substrate G 4 . The first GAL casing member G 111  has a side surface portion G 111   a  to face the left surface of the GAL substrate G 4 , and a front surface portion G 111   b , a top surface portion G 111   c , a low surface portion G 111   d  formed to surround the GAL substrate G 4 . 
     In the upper front end portion of the side surface portion G 111   a  is formed a protruding portion G 111   e . As shown in  FIG. 94 , the protruding portion G 111   e  is formed so as to engage with the through hole G 4   a  of the cased GAL substrate G 4 . Further, as shown in  FIG. 93 , in the middle portion of the front surface portion G 111   b  is formed an engagement recess portion G 111   f  extended in the left/right direction. In the upper front end portion and the lower front end portion of the side surface portion G 111   a  are formed abutting portions G 111   g  and G 111   h . The abutting portions G 111   g  and G 111   h  are each formed to abut the left surface of the cased GAL substrate G 4 . Further, in the top surface portion G 111   c  and the low surface portion G 111   d  of the first GAL casing member G 111  are protruding portions G 111   i  and G 111   j  linearly extended from the front end portion to the rear end portion. 
     On the other hand, the second GAL casing member G 112  is disposed to face the first GAL casing member G 111  over the GAL substrate G 4 . The second GAL casing member G 112  has a side surface portion G 112   a  to face the right surface of the GAL substrate G 4 , and a front surface portion G 112   b , a top surface portion G 112   c , a low surface portion G 112   d  formed to surround the GAL substrate G 4 . Inner side portions at the leading ends of the front surface portion G 112   b , the top surface portion G 112   c , and the low surface portion G 112   d  are formed to fit with the inner side portions of the leading end portions of the front surface portion G 111   b , the top surface portion G 111   c , and the low surface portion G 111   d  of the first GAL casing member G 111 , respectively. 
     In the upper front end portion and the lower front end portion of the side surface portion SD 112   a  are formed not-shown protruding portions. The protruding portions are each formed to abut the right surface of the cased GAL substrate G 4 . Thus, the GAL casing G 11  positions and holds the front portion of the GAL substrate G 4  by: sandwiching the upper front end portion and the lower front end portion of the GAL substrate G 4  between the protruding portions G 111   g  and G 111   h  of the first GAL casing member G 111  and the protruding portion of the second GAL casing member G 112 , and engaging the protruding portion G 111   e  with the through hole G 4   a . Further, in the rear end portion of the second GAL casing member G 112  is formed a connector insertion hole G 112   f . With the rear end portion of the connector unit G 41  inserted into the connector insertion hole G 112   f , the back portion of the GAL substrate G 4  is positioned and held. 
     Further, in the middle portion of the front surface portion G 112   b  of the second GAL casing member G 112  is formed an engagement protrusion portion G 111   e . The engagement protrusion portion G 111   e  protrudes in a direction towards the first GAL casing member G 111  (leftward), and its leading end portion is bent backwardly in a hook-like manner. The engagement protrusion portion G 111   e  is formed so as to engage with the engagement recess portion G 111   f  of the first GAL casing member G 111 , when the first GAL first GAL casing member G 111  and the second GAL casing member G 112  are abutted to each other and assembled into one piece as the GAL casing G 11 . With the insertion of the connector unit G 41  into the connector insertion hole G 112   f  and engagement of the engagement protrusion portion G 111   e  into the engagement recess portion G 111   f , the GAL casing G 11  is able to maintain its assembled state in one piece, without a need for screw-fastening the casing members SD 111  and SD 112 . 
     Further, in the top surface portion G 112   c  and the low surface portion G 112   d  of the second GAL casing member G 112  are protruding portions G 112   i  and G 112   j  linearly extended from the front end portion to the rear end portion. As shown in  FIG. 95 , these protruding portions G 112   i  and G 112   j  are positioned so as to face the protruding portions G 111   i  and G 111   j  of the first GAL casing member G 111 , when the GAL casing G 11  is assembled into one piece. This way, the protruding portions G 111   i  and G 111   j  and the protruding portions G 112   i  and G 112   j  form a guiding space extending from the front end to the rear end, on the top surface and the low surface of the GAL device G 1 . Edges of the AXGMEM substrate GB are positioned in the spaces between the protruding portions G 111   i  and G 111   j , and between G 112   i  and G 112   j , when the GAL device G 1  is mounted to the GAL mounting device G 2 , and the connector insertion hole G 112   f  of the GAL device G 1  is guided to the connector unit G 41 ,  FIG. 92 . 
     (Device Main Body  4 : Security Cage SK: GAL Mechanism G: GAL Mounting Device G 2  and GAL Support Plate G 3 ) 
     The GAL mounting device G 2  includes: a connector to be connected to the Connector unit G 41  shown in  FIG. 94 , and is implemented on the AXGMEM substrate GB. On the other hand, the GAL support plate G 3 , the GAL support plate G 3  is attached to the connector attachment plate SK 7  shown in  FIG. 84 . As shown in  FIG. 96 , the GAL support plate G 3  has a first through hole G 3   a  and a second through hole G 3   b . The first through hole G 3   a  is formed in a shape similar to that of the front end surface of the GAL device G 1 , with a size slightly bigger than that of the front end surface of the GAL device G 1 , and has notches G 3   c  through which the protruding portions G 111   i  and G 111   j , and the G 112   i  and G 112   j  pass are formed in the upper end portion and a lower end portion. The second through hole G 3   b  makes an LED device MB  1  visible from outside, and the LED device MB  1  indicates an operation status of the AXGMEM substrate GB by means of emitting light. 
     (Device Main Body  4 : Security Cage SK: AXGMEM Substrate GB) 
     The AXGMEM substrate GB is provided in such a manner that its substrate surface is parallel to the vertical direction. The AXGMEM substrate GB has in its front end portion a notch GB 2 . At the rear end portion of the notch GB 2  is provided the GAL mounting device G 2 . Further, the notch GB 2  is positioned so that its upper end portion and the lower end portion are in the middle position of the notches G 3   c  relative to its width direction, in the first through hole G 3   a  of the GAL support plate G 3 . Thus, when the GAL device G 11  is mounted to the GAL mounting device G 2 , the upper end portion and the lower end portion of the notch GB 2  of the GAL support plate G 3  are each positioned between the protruding portions G 111   i  and G 111   j  or between the protruding portions G 112   i  and G 112   j . The AXGMEM substrate GB has a PCI terminal part GB 3  in its lower end portion. The PCI terminal part GB 3  is mounted on the extension slot AM 25   b  of the APX motherboard AM. 
     (Device Main Body  4 : Security Cage SK: APX Motherboard AM) 
     The APX motherboard AM is provided in the security cage SK, as shown in  FIG. 91A . The front end portion of the APX motherboard AM is connected to terminals of connectors provided to the connector attachment plate SK 7 . As shown in  FIG. 91B , the APX motherboard AM has a plurality of extension slots AM 1 , AM 25   a , AM 25   b , and AM 25   c . The extension slots AM 1 , AM 25   a , AM 25   b , and AM 25   c  are in compliance with the PCI Express bus standards, and the PCI terminal part GB 3  of the AXGMEM substrate GB is mounted to the extension slot AM 25   b.    
     The extension slots other than the extension slot AM 25   b  to which the AXGMEM substrate GB is mounted, i.e., the extension slots AM 1 , AM 25   a , and AM 25   c , are vacant. Thus, simply by visually confirming the status of the extension slots AM 1 , AM 25   a , AM 25   b , and AM 25   c , it is possible to detect a wrong action of mounting an invalid board to any of the vacant extension slots AM 1 , AM 25   a , and AM 25   c.    
     The APX motherboard AM has a plurality of SATA substrate connectors AM 2 , and the SATA substrate connectors AM 2  are connected to the connector unit SD 323  of the SSD mounting device SD 32 , via a not-shown SATA cable. Further, the APX motherboard AM includes: a buzzer AM 3  that outputs an alarm sound and the like, connectors AM 4  that conform to various communication standards such as a display port and a comb port, a memory slot AM 5  mounting thereto a DIMM substrate having a DDR3 memory, capacitors, and the like. 
     (Security Structure) 
     As hereinabove described, a slot machine  1  of the present embodiment includes an upper door device  42 , a lower door device  43 , and a bill drop door  437  as doors that can be opened or closed by a person from the outside. Further, the slot machine  1  has, as doors inside the casing  411 , a security cage door SK 3 , a main body substrate casing N 1 , a sub substrate casing SI 1 , and a bill stocker door BI 3 . Further, the slot machine  1  includes au upper door lock mechanism D 1  configured so that, of the lower door device  43  configured to open and close a bottom space  41 C (lower casing portion) which accommodates equipment important for the system security and the upper door device  42  configured to open and close a top space  41 A (upper casing portion) which accommodates a reel device M 1  and the like, enables opening of the upper door device  42  provided that the lower door device  43  is already opened. 
     (Security Structure: Upper Door Device  42 ) 
     Specifically, as shown in  FIG. 58 , the upper door lock mechanism D 1  is disposed in the bottom space  41 C so that the upper door lock mechanism D 1  is uncovered and operable only when the lower door device  43  is opened. Thus, by unlatching the upper door lock mechanism D 1  after the lower door device  43  is opened, the upper door device  42  opens with a hinge mechanism at the left end as the fulcrum. The upper door device  42  mainly enables access to the reel device M 1  and the main body substrate casing N 1  in the casing  411 . Opening and closing of the upper door device  42  are sensed by an upper door switch SE 3 , and monitoring based on the sensor signals from the upper door switch SE 3  is performed. When the upper door device  42  is opened, an alarm sound is output. 
     (Security Structure: Lower Door Device  43 ) 
     The lower door device  43  is opened the hinge mechanism at the left end as the fulcrum, by unlocking the lock by the key cylinder D 25 , and then pushing up a door lock bar D 24  to unlatch the lower door lock mechanism D 2 . The lower door device  43  mainly enables access to a power switch R 112  of the power source unit RU, the security cage door SK 3  of the security cage SK, the sub substrate casing SI 1 , the printer device PR, and the bill stocker BI in the casing  411 . Further, opening and closing of the lower door device  43  are sensed by a first lower door switch SE 1 , a second lower door switch SE 2 , and reflective lower door optical sensors SE 4 , and monitoring based on the sensor signals from the door switches SE 1  and SE 2  and from the lower door optical sensors SE 4  is performed. When the lower door device  43  is opened, an alarm sound is output. 
     (Security Structure: Bill Drop Door  437 ) 
     As shown in  FIG. 50  and  FIG. 51 , the bill drop door  437  opens with the hinge mechanism at the left end as the fulcrum, by unlocking the lock by the key cylinder BR 4 , which releases the latched state of the engagement member BR 2  maintained by a spring BR 3 . The bill drop door  437  mainly enables access to the bill stocker door BI 3  in the casing  411 , as shown in  FIG. 52 . Opening and closing of the bill drop door  437  are sensed by a bill drop door switch SE 5  as shown in  FIG. 58 , and monitoring based on the sensor signals from the bill drop door switch SE 5  is performed. When the bill drop door  437  is opened, an alarm sound is output. 
     (Security Structure: Security Cage SK) 
     The security cage SK is structured so that, the security cage door SK 3  is opened with a hinge mechanism at its lower end portion, by unlocking the lock of security cage door SK 3  by the key cylinder SK 5 , after the lower door device  43  is opened. Further, as shown in  FIG. 85 , opening and closing of the security cage door SK 3  are sensed by the first sensor SK 103  and the second sensor SK 104  of the cage open/close detection mechanism SK 10 . The first sensor SK 103  and the second sensor SK 104  function as security door switches, and causes output of an alarm sound when the security cage door SK 3  is opened. 
     Since the security cage door SK 3  is disposed behind the lower door device  43  and is locked by the key cylinder SK 5 , two keys, one for the lower door device  43  and the other for the security cage door SK 3 , are required to access the APX motherboard AM and the AXGMEM substrate GB inside the security cage SK. Further, connectors of the security cage SK are all over the security cage door SK 3 , access to these connectors is not possible unless the security cage door SK 3  is opened. The lower door device  43  and the security cage SK, when opened, causes alarming by an alarm sound. Further, the SSD mounting device SD 3  having an SSD which is a program recording medium is provided over the security cage door SK 3 , and detaching of this SSD mounting device SD 3  also causes alarming by an alarm sound. 
     (Security Structure: Main Body Substrate Casing N 1 ) 
     As shown in  FIG. 66 , the main body substrate casing N 1  is disposed behind the upper door device  42  and the reel device M 1 , and accommodates a first GM substrate GM 1  and a second GM substrate GM 2  which manage inputs and outputs of peripherals, motors, and illumination. This way, the main body substrate casing N 1  does not allow access to the first GM substrate GM 1  and the second GM substrate GM 2 , unless the upper door device  42  is opened, and then the reel device M 1  is removed and the screw on the lid N 3  is unfastened to open the lid N 3  with its lower end portion as the fulcrum. Further, since the connectors are also in the main body substrate casing N 1 , access to these connectors is not possible unless the lid N 3  is opened. Opening and closing of the main body substrate casing N 1  are sensed by a main body substrate casing switch SE 6 , and monitoring based on the sensor signals from the main body substrate casing switch SE 6  is performed. When the lid N 3  of the main body substrate casing N 1  is opened, an alarm sound is output. 
     (Security Structure: Sub Substrate Casing SI 1 ) 
     As shown in  FIG. 47 , the sub substrate casing SI 1  is disposed on the back surface of the lower door device  43 , and accommodates a sub I/O substrate SI 3  which manages inputs and outputs of operation buttons and illuminations. Thus, the sub substrate casing SI 1  does not allow access to the sub I/O substrate SI 3  unless the lower door device  43  is opened, and then the screw on a fixing portion SI 1   c  is unfastened to remove the lower door base member  438  of the sub substrate casing SI 1  is removed. Further, since the connectors are also in the sub substrate casing SI 1 , access to these connectors is not possible unless the sub substrate casing SI 1  is removed. Further, an alarm sound is output when the lower door device  43  is opened. This alarm sound functions as an alarm sound related to detaching of the sub substrate casing SI 1 . 
     Note that opening and closing of the sub substrate casing SI 1  may be sensed by a not-shown substrate casing switch provided to the sub I/O substrate SI 3  and the like. When the sub substrate casing SI 1  is opened, an alarm sound is output. 
     (Security Structure: Bill Stocker Door BI 3 ) 
     As shown in  FIG. 52 , the sub substrate casing SI 1  is opened by opening the bill drop door  437 , unlocking the lock by the key cylinder BR 4 , and drawing out the upper end portion of the bill stocker door BI 3 , using the latch mechanism at the lower end portion of the bill stocker door BI 3  as the fulcrum. Opening and closing of the bill stocker door BI 3  are sensed by two bill stocker door switches SE 7 , and monitoring based on the sensor signals from the bill stocker door switch SE 7  is performed, as shown in  FIG. 60 . When the bill stocker door BI 3  is opened, an alarm sound is output. 
     (Electrical Structure: Overall Block Diagram) 
     The following describes an electrical structure of the slot machine  1  with the above structure. As shown in  FIG. 97A , the slot machine  1  adopts a CPU with a built-in function of a GPU (Graphics Processing Unit) and eliminates the need of a graphic board which is an extension board. By doing so, the slot machine  1  prevents unauthorized operation via the PCIE, and restrains the power consumption and heat generation. That is, the slot machine  1  is a gaming machine adopting a CPU with a GPU built therein, and has (on a single die) a processor with a built-in GPU, a PCI Express extension slot AM 25   b  to which an AXGMEM substrate GB connected to a GAL substrate G 4  with an authentication program implemented thereon is mounted; and a display port connector SK 85  (SK 85   a , SK 85   b ) connected to the GPU. The extension slots AM 1 , AM 25   a , and AM 25   c , are not in use (vacant). 
     Thus, the slot machine  1  requires no graphic board connected to the PCI Express extension slots AM 1 , AM 25   a , and AM 25   c . With the use of extension slot AM 25   b  exclusively to the authentication, the extension slot AM 25   b  in use and the extension slots AM 1 , AM 25   a , and AM 25   c  are clearly distinguishable by their external appearances. This facilitates monitoring of wrong actions. Further, the slot machine  1  is capable of preventing problems that take place when a graphic board is connected to any of the extension slots AM 1 , AM 25   a , and AM 25   c  not in use; e.g., processing such as interruptions and the like occurring between boards leading to unsmooth output based on video signals and/or audio signals; and an interruption occurring between boards conflicting with another interruption. In the slot machine  1 , the display port connector SK 85  serves as a terminal exclusive to video (or audio). This prevents interference with another board, thus leading to smooth outputs of video (audio) signals, accurately in synch with the progress of games. 
     The slot machine  1  reduces the possibility of having video interrupted during games, by adopting a motherboard having thereon a CPU with a built-in graphic engine that realizes a GPU function. That is, in the slot machine  1 , the motherboard having thereon a CPU with a built-in graphic engine outputs to the sub-substrate video data of an effect image from the graphic engine controlled by the CPU, while the CPU outputs audio signals to the sub-substrate. With this structure, the video data and audio data output from the motherboard are under control of a single CPU with the built-in graphic engine. Therefore, unless the CPU breaks down, there will not be a situation in which presentation by the effect becomes unclear because only one of video and audio is output to the sub-substrate. 
     It should be noted that the slot machine  1  may adopt a structure such that the motherboard is connected, via PCI Express, to an authentication substrate (GAL substrate G 4 ) having a flash RAM storing various boot related data of different data volumes, such as boot BIOS used for booting Slot machine  1 , public key, and the like, and that the boot related data is transferred to the DRAM on the motherboard at the transfer rate according to the data volume detected for each set of boot related data, so as to execute boot processing based on the boot related data in the DRAM. The PCI Express allows dynamic variation of transfer rate from the software. This contributes to saving of power consumption unless the maximum transfer rate is required. Thus, the booting period and power consumption are automatically optimized, in cases where data volume largely changed by updating of data such as boot BIOS on the authentication board. 
     Further, the slot machine  1  may adopt a structure such that: the motherboard (APX motherboard AM) is connected, via PCI Express AM 25   b , to an authentication substrate (GAL substrate G 4 ) having a flash RAM storing various boot related data of different data volumes, such as boot BIOS used for booting Slot machine  1 , public key, and the like; that the boot related data is transferred to the DRAM (memory substrate MM 6 ) on the motherboard; and that when the boot process is executed based on the boot related data in the DRAM, an increase in the temperature of the authentication board due to data transfer is monitored, and the transfer rate of the boot related data is controlled based on the increase in the temperature. Since the temperature of the authentication board increases proportionally to the power consumption, it is possible to execute the boot process with stable power consumption and transfer rate by, for example, controlling the transfer rate to maintain a constant increase in the temperature. 
     The slot machine  1  is a gaming machine that uses an SSD (SSD substrate SD 2 ) storing an OS (Operating System) and includes an APX motherboard AM having a CPU and an SATA terminal (SATA substrate connectors AM 2 ) and the SSD connected to the SATA terminal. 
     Thus, in the slot machine  1 , the OS is booted from the SSD connected via the SATA terminal. This eliminates problems in cases of booting an OS from a flash memory such as an SD card; i.e., a need of an conversion adaptor, an instability in operations, and high costs. Further, when an OS is booted from a flash memory such as an SD card, recognition at the BIOS level is required, and there were some motherboards that could not boot the OS. If however the SSD is used for booting an OS, the OS is suitably and promptly booted. This improves the versatility and enables quick start up of programs for the gaming machine. 
     Further, the slot machine  1  includes the motherboard (APX motherboard AM) on which two display port terminals (display port connectors SK 85   a  and SK 85   b ), and enables three screen output including a DVI output, thereby achieving a higher-speed and larger screen than HDMI (Registered Trademark), while eliminating the costs for licenses. Further, the slot machines  1  has a DPDAMP substrate DD (Display port audio amplifier circuit) which receives audio signals from the display port connector SK 85  (SK 25   a  and SK 25   b ), and which performs amplification and output based on the audio signals. 
     In the slot machine  1 , the video data and the audio data in the game are output from the display port connector SK 85  (SK 85   a  and SK 85   b ) in units of a packet, and audio and visual effects are provided in effect machines. With this structure, the video data and audio data are output through the signal line drawn out from the display port connector SK 85  (SK 85   a  and SK 85   b ). Therefore, there will not be a problem in which one of the video data and audio data is missing. Thus, at a time of outputting the audio and video related to a result of a random determination, there will not be a situation in which only one of the audio and video is output, thus failing to give sufficient report. Further, it is possible to tie a plurality of displays in a row, facilitating provision of an additional display. Therefore, modification in the design based on an already existing slot machine  1 . For example, in cases of providing a display device to the top device  3 , in addition to the upper side liquid crystal display panel  32212  and a lower side liquid crystal display panel  4254 , the work of connecting mechanical signal lines is done simply by connecting the signal lines from the upper side liquid crystal display panel  32212  and the like to the display device of the top device  3 , and this allows an easy maintenance. Further, the data transmission is done in units of a packet, there is no need of transmitting data sequentially to a plurality of display device. Therefore modification of programs is easily done. 
     Specifically describing the electrical structure of the slot machine  1 , the slot machine  1  has an APX motherboard AM accommodated in a security cage SK. The APX motherboard AM has not-shown fourth Generation Intel® Core Processor, and has an improved power source management function (C-state). Further, integration of a VR (Voltage Regulator) to the package/die of the processor allows simple power source design of the entire platform, thus realizing reduction of power consumption including the motherboard. It should be noted that the fourth Generation Intel Core Processor supports up to 20 EUs (Execution Units) each of which is an image processing unit in the GPU core. This way significant improvement in the performance as compared with the third Generation Intel Core Processor is achieved. Further, a chip set of the fourth Generation Core i series has a plurality of SATA6Gb/s (SATA3.0) ports serving as a high speed interface, and supports the PCI Express 3.0 for performing smooth data transfer with a high performance video card, and DDR3-1600 Standard which is a high-speed memory standard. 
     Further, the APX motherboard AM includes: an extension slots AM 1 , AM 25   a , AM 25   b , and AM 25   c  of PCI (Peripheral Component Interconnect) Express, 
     a SATA substrate connectors AM 2 , a first display port connector SK 85   a  and a second display port connector SK 85   b , first LAN jack SK 87  and a second LAN jack SK 91 , a first D-Sub connector SK 86  and a second D-Sub connector SK 84 , first to sixth USB connectors SK 82   a , SK 82   b , SK 88   a , SK 88   b , SK 90   a , SK 90   b.    
     The “PCI Express” is a serial transfer interface for personal computers which is substituted for a PCI bus. Though the PCI Express is not compatible physically with the PCI bus adopting a parallel transmission scheme, the communication protocol and the like are the same. The transmission path (so-called “lane”) which is the minimum configuration of the PCI Express enables full duplex communication of 5.0 Gbps (2.5 Gbps for one way). However, to transfer 8 bit data, there will be additional 2 bits for clock signals and the like, which sums up to 10 bits. Therefore, the effective data transfer rate is 2.0 Gbps for one way (250 MB/s), and 4.0 Gbps (500 MB/s) for two ways. The extension slots AM 1 , AM 25   a , AM 25   b , and AM 25   c  of the APX motherboard AM are each structured by bundling a plurality of lanes of the PCI Express port. 
     “SATA (Serial AT Attachment)” is an extension specification of the IDE (ATA) standards for connections between a personal computer with a storage device such as a HDD and an optical drive. SATA is an ATA specification which adopts serial transmission scheme in place of the parallel transmission scheme, and allows a high transfer rate with a simple cable. 
     “Display port” is a full digital video interface and adopts a micropacket scheme utilizing a built-in clock. The micropacket scheme enables transmission of secondary digital audio data in addition to the main video data, and adopts a scheme that transmits in bundle picture elements and audio signals in the form of packets so-called micropackets. In other words, in the micropacket scheme, the entire audio and visual data is divided into micropackets called “Transfer Units”, and serially transfer them to the destination devices. 
     The “display port” generates clock from the data without using an external clock. This facilitates acceleration of data transfer and expansion of functions. Further, since the “display port” is a video output interface designed for display devices, it allows reduction of the number of components by adopting a liquid crystal display as the display device, and has a transmission distance of approximately 15 meters. 
     The “display port” defines the output end as “source device” and the input end as “sink device”. With the source device and the sink device communicating with each other, the resolution, color depth, refresh rate, and the like are automatically optimized. When video data and audio data are transferred, the transfer rate is variable by a combination of 1, 2, or 4 channels called “lanes” and 2 data rates (1.62 Gbps and 2.7 Gbps). For example, the minimum configuration is 1 lane, and 1.62 Gbps, and the maximum configuration is 4 lanes times 2.7 Gbps, i.e., 10.8 Gbps. The main data channel of the “display port” is configured by 1, 2, or 4 high speed SerDes lane(s), and the bandwidth of each lane is 2.7 Gbps or 1.62 Gbps. 
     The “display port” includes a hot plug detection (HPD) signals. The hot plug detection is for not only confirming connection with a display device, but also for establishing a link. The hot plug detection includes a process of requesting the transmission end to establish a link through a process called link training. During this process, whether or not all of the 4 lanes are necessary is checked in both the transmission end and the reception end. Further, the “display port” also has an AUX (Auxiliary) channel. The AUX is a low-speed “side channel” which serves as a communication channel for managing a link based on information from the transmission end, and for controlling the status and configuration. The AUX channel enables bidirectional communications of video and audio. 
     The “display port” allows a use of multiple display devices unlimitedly from a single digital output port without restriction by a display application, and maximizes the performance of displays without any delay. Further, the “display port” is a plug-in-and-play type port, which requires no manual setting by a user. Thus, for example, if an additional display device is provided without using the “display port”, an additional graphic card or additional provision of a multiple head graphic card having a plurality of output ports is needed. These cards lead to an increase in the power consumption, and lead to difficulties in adding these cards. To the contrary, these problems will not be a concern when the “display port” is used. As the result, the “display port” enables addition of a display and the like without a need of opening the security cage SK of a slot machine  1  requiring a high confidentiality. 
     The “display port” adopts the micropacket scheme, to enable simultaneous transmission of a plurality of audio and video streams, and the other types of data. Therefore, a plurality of videos and audio packets are transmitted through a single cable. Thus, the “display port” allows transmission of a picture-in-picture and activating a plurality of daisy-chained display devices, via a single connection, at the link speed same as that in cases of a hub-connection. 
     It should be noted that a daisy-chain connection is such that an input port and an output port of the display port are implemented on each display device, and connecting the output port of a source end to the input port of a display device in the subsequent stage (sink end) on a single link, and connecting the output port of that display device as the source end is connected to an input port of another display device in the subsequent stage (sink end). On the other hand, in the hub-connection, there are a plurality of output ports for a single input port, and the input ports of a plurality of display devices are connected to the output ports. 
     The extension slot AM 25   b  is connected to with an AXGMEM substrate GB so as to enable two-directional data communications. In the AXGMEM substrate GB, the GAL substrate G 4  is connected so as to enable two-directional data communications, and a Boot BIOS self-authentication process and the like is performed with the GAL substrate G 4 . The Boot BIOS self-authentication process is detailed later. Further, the AXGMEM substrate GB is connected to a first sensor SK 103  and a second sensor SK 104  which function as a security door switch, and monitors opening/closing of the security cage door SK 3  based on sensor signals from these sensors SK 103  and SK 104 . 
     The SATA substrate connectors AM 2  is connected to the SSD substrate SD 2  so as to enable two-way data communications. The first display port connector SK 85   a  is connected to the upper side liquid crystal display panel  32212  so as to enable one-way data communications. The second display port connector SK 85   b  is connected to the DPDAMP substrate DD so as to enable one-way data communications. The DPDAMP substrate DD is an audio amplifier substrate for the display port. The DPDAMP substrate is connected to the lower side liquid crystal display panel  4254 , and the speakers  433   a ,  433   b , and SP 1  so as to enable one-way data communications. 
     A first LAN jack SK 87  is an interface of an SAS (Serial Attached SCSI) which is an SCSI standard with a serial transmission scheme, and is used for data communications with the PTS device GG 1  having the SAS interface. A second LAN Jack SK 91  is used for data communications with an information processing device GG 2  called “GAT 3 ” for checking. A first sub-connector SK 86  is connected to the bill stocker BI so as to enable one-way data communications. A second sub-connector SK 84  is connected to the printer device PR so as to enable one-way data communications. 
     A first USB connector SK 82   a  is connected to the sub I/O substrate SI 3  so that the sub I/O substrate SI 3  is able to receive data transferred in one-way communications. To the sub I/O substrate SI 3  are connected a maximum of 16 button switches CP 1   a  of the control panel CP, and a button LEDCP 1   b . Further, the sub I/O substrate SI 3  is connected to a light emission substrate  4353  and a counter mechanism CT. 
     A second USB connector SK 82   b  is connected to the first GM substrate GM 1  so that the first GM substrate GM 1  is able to receive data transferred in one-way communications. The first GM substrate GM 1  is connected to a GMR driver M 103  which controls the rotation and drive of the reel device M 1  To the GMR driver M 103  are connected reel motor M 51  of each reel unit M 11 , a backlight unit M 7 , an index sensor M 101 , a magnetic encoder M 102 , and the like. Further, the first GM substrate GM 1  is connected to the upper side light source substrate  4263  and a lower side light source substrate  4273 . 
     A third USB connector SK 88   a  is connected to the second GM substrate GM 2  so that the second GM substrate GM 2  is able to receive data transferred in one-way communications. The second GM substrate GM 2  is connected to the casing fan sensor FNS 2  shown in  FIG. 59  and a power source box fan sensor FNS 1  shown in  FIG. 68 . The fan sensors FNS are each configured to output fan temperature signals indicative of the temperature of the fan. Further, the second GM substrate GM 2  is connected to the main body substrate casing switch SE 6 , the upper door switch SE 3 , optical sensors SE 4 , a line light source member  2134 , and an LED substrate LDP for driving the line light source member  2134 , the illumination mechanism  424 , and the like. 
     Further, a fourth USB connector SK 88   b  is used as a spare USB connector. A fifth USB connector SK 90   a  is connected to the upper side touch panel  32211  so as to enable two-way data communications. A sixth USB connector SK 90   b  is connected to the lower side touch panel  4251  so as to enable two-way data communications. 
     To the APX motherboard AM is mounted a memory substrate MM 6  having a DDR3 memory. Memory substrate MM 6  performs an OS authentication process in cooperation with the SSD substrate SD 2 , and the other processes. The OS authentication process is detailed later. 
     Thus, the slot machine  1 , with the SSD, achieves a longer life. That is, the slot machine  1  stores various programs for booting and operating the slot machine  1 , has an SSD structured by a flash memory, transfers the programs read out from the SSD to the DRAM of the motherboard, and executes the programs in the DRAM to boot and operate the gaming machine. 
     The above described structure brings about the following effects. Namely, in the SSD, there will be no driving mechanism such as a bearing and a motor for spinning the disk of an HDD. This greatly reduces the mechanical failure due to wearing off taking place in the driving mechanism, and the like. The SSD in general, the oxide film serving as the insulator of the storage cells in the flash memory is deteriorated by electrons with an increase in the number of rewriting and deleting data. In the above structure however, the access to the SSD is mainly for reading out the programs. Therefore, the deterioration of the storage cells is restrained as compared to cases where flash memory is accessed to rewrite and delete data. Thus, as in the case of accessing the HDD, the SSD is used without causing wearing off of the storage cell. This reduces the chances of malfunctions such as effect screen and audio interrupted in the middle of game, to a level lower than cases of adopting an HDD. That is, the life of the gaming machine is made longer with the provision of SSD. 
     The slot machine  1  further enables prevention of breakdown during a game, with the provision of the SSD. That is, the slot machine  1  stores various programs for booting and operating the slot machine  1 , has an SSD structured by a flash memory, grasps, at a predetermined timing such as booting, the number of rewriting and deleting performed in relation to the SSD, and prompts replacement of the SSD and the like, when the number of rewriting and deleting has reached a threshold or more meaning that the storage cells may break down. 
     Even if there is no data saving intentionally performed in the SSD, data of some kind such as boot information and a data-reading status is always written in. Therefore, even if the SSD is accessed only for reading in data therefrom, the storage cells are deteriorated as used. If the gaming machine is used for a long period of time, the storage cells are deteriorated to the extent that breakdown easily occurs. The above described structure however prompts replacement of the SSD and the like, when the number of rewriting and deleting has reached a threshold or more meaning that the storage cells may break down. This prevents occurrence of breakdown in the middle of game. 
     It should be noted that, in Embodiment 1, one display port connector SK 85   a  is connected to the upper side liquid crystal display panel  32212 , another display port connector SK 85   b  is connected to the lower side liquid crystal display panel  4254  via the DPDAMP substrate DD. This way, a plurality of displays are controlled via a plurality of display port terminals. However, the present invention is not limited to this. A plurality of displays may be controlled via a single display port terminal. 
     For example, as shown in  FIG. 97B , the upper side liquid crystal display panel  32212  may be provided with a display port having an input/output port. Further, the output port of the display port of the upper side liquid crystal display panel  32212  may be connected to the DPDAMP substrate DD. By doing so, the upper side liquid crystal display panel  32212  and the lower side liquid crystal display panel  4254  may be connected in a daisy-chain mode. Alternatively, the lower side liquid crystal display panel  4254  may be provided with an output port of a display port, and the upper side liquid crystal display panel  32212  may be connected to this output port. Alternatively, at a time of additionally providing a display  4254 A, the display  4254 A may be connected to the output port of the upper side liquid crystal display panel  32212  or the lower side liquid crystal display panel  4254 . 
     (Electrical Structure: GAL Substrate G 4 ) 
     Next, the following describes an electrical structure of the GAL substrate G 4 . As shown in  FIG. 98 , the GAL substrate G 4  has a connector unit (AXGMEM PCB) G 41 . On the GAL substrate G 4  is mounted a CPLD circuit G 42  and a constant voltage circuit G 43 . The connector unit SD 41  is electrically connected to the CPLD circuit G 42  and the constant voltage circuit G 43 . The connector unit SD 41  is connected to a FPGA (Field-Programmable Gate Array) circuit GB 5  of the AXGMEM substrate GB shown in  FIG. 99  in such a manner as to enable two-way data communications, and is configured to perform Boot BIOS self-authentication process and the like with the AXGMEM substrate GB and the GAL substrate G 4 . 
     The CPLD circuit G 42  is connected to the AXGMEM substrate GB so as to enable two-way data communications. From the AXGMEM substrate GB, SK (Serial Clock) signals, CS (Chip Select) signals, DI (Data Input) signals are transmitted to the CPLD circuit G 42 , and DO (Data Output) signals are transmitted from the CPLD circuit G 42  to the AXGMEM substrate GB. Further, the constant voltage circuit G 43  is a +3.3V regulator. With the constant voltage circuit G 43 , a constant voltage of +1.8 V is supplied to the CPLD G 42 . 
     The “CPLD circuit” is a type of programmable logic device, whose degree of integration is between those of PAL and FPGA, and has characteristics of the both PAL and FPGA. Blocks created by the CPLD circuit are macro cells. 
     (Electrical Structure: AXGMEM Substrate GB) 
     Next, the following describes an electrical structure of the AXGMEM substrate GB. As shown in  FIG. 99 , the AXGMEM substrate GB has a PCI terminal part (PCIE x1 End Point PEX8311) GB 3  which is connected to the extension slot (PCIE x1 Slot) AM 25   b  of the APX motherboard AM. For example, as the PCI terminal part GB 3 , PEX8311 in compliance with specification 1.0a of a PCI Express to Local Bridge is adopted. The PCI terminal part GB 3  is mounted to the extension slot AM 1 , and two-way data communications is performed with a bus of the PCI Express x1 standard. Further, the PCI terminal part GB 3  has 2 EEPROM I/Fs, and is connected to an EEPROM (Electrically Erasable Programmable Read-Only Memory) GB 3   a  and an EEPROM GB 3   b  which is a type of nonvolatile storage. The EEPROM GB 3   a  has a volume of 1 kbit, and stores PCIe ConFIG. The EEPROM GB 3   b  has a volume of 2 kbit, and stores Local ConFIG. 
     The PCI terminal part GB 3  is connected to SRAMs (Static Random Access Memory) GB 4   a  to GB 4   d , and to an FPGA circuit GB 5 , via a local bus. To the SRAMs GB 4   a  to  4   d , power is supplied from a power source GB 13  via a slide switch GB 13   a  which selects the powering destination. The local bus enables transmission and reception of control signals such as local address input signals LA[31:2], local data input signals LD [15:0], local bus byte enable input signals LBE [3:0]. The SRAMs GB 4   a  to  4   d  each has a volume of 16 Mbit. At least one of the SRAMs GB 4   a  to  4   d  is connected, and as an option, two or four of them may be connected to ensure a volume of 33 Mbit or 64 Mbit. 
     Further, as an option, a micro controller GB 6   b  and a ROM GB 7  may be connected to the local bus, via a bus switch (BU SW) GB 6   a  for switching the bus lines of the local bus at a high speed. As the micro controller GB 6   b , for example, PIC32MX330F064L having a CPU and a Flash ROM may be adopted. To the micro controller GB 6   b , power is supplied from the power source GB 13 , via the slide switch GB 13   a . Further, between the slide switch GB 13   a  and the micro controller GB 6   b , the voltage monitor ICGB 13   b  for monitoring the voltage is connected, and the power supplied from the power source GB 13  is monitored. When signals indicative of abnormal drop in the power source (Battery Low) and the like is detected, a reset function resets the system to prevent an uncontrollable error. Further, the micro controller GB 6   b  is connected to a connector J 5  and a connector CN 3 . With an UART interface, the connector J 5  is connected so as to enable two-way communications using a TXD for transmission and an RXD for reception. The connector CN 3  is connected so as to enable one-way communications through a GPIO (General Purpose Input/Output)  20  Interface. It should be noted that the micro controller GB 6   b  receives a reset signal (RESET) from the voltage monitor ICGB 13   b , and outputs a reset switch flag (RST-SW, FLAG) to the FPGA circuit GB 5 . The ROM GB 7  is selected from 1M, 2M, and 4 Mbit, and is mountable to a socket. 
     The AXGMEM substrate GB has the FPGA circuit GB 5 . The FPGA circuit GB 5  is connected to the PCI terminal part GB 3  via a local bus. The FPGA circuit GB 5  is connected to the connector unit G 41  of the GAL substrate G 4  so as to enable two-way data communications. From the FPGA circuit GB 5 , SCK (Serial Clock) signals, CS (Chip Select) signals, DI (Data Input) signals are transmitted to the connector unit G 41 , and DO (Data Output) signals, and SD-SEN (Shut Down Output) signals are transmitted from the connector unit G 41  to the FPGA circuit GB 5 . 
     The FPGA circuit GB 5  is connected to a serial flash memory (Serial FLAXH Memory) GB 8  which is a nonvolatile semiconductor memory. Data stored in the semiconductor memory GB 8  is output to the FPGA circuit GB 5  as needed. It should be noted that the serial flash memory GB 8  may be also mounted to an IC socket. 
     The FPGA circuit GB 5  has a GPIO interface GP 9  which outputs 8-bit signals to the connector CNB. The FPGA circuit GB 5  has a GPIO interface GP 10  which receives 8-bit signals from a connector CN 7 , via a low pass filter GB 10   a.    
     The FPGA circuit GB 5  has a 4-kbit EEPROM GB 11 , and stores initial data. The FPGA circuit GB 5  may further have an 8-kbit EEPROM GB 12  mounted to an IC socket, and may store key data. 
     To the FPGA circuit GB 5 , power is supplied from a power source GB 13  via a slide switch GB 13   a  which selects the powering destination. Further, between the slide switch GB 13   a  and the FPGA circuit GB 5 , the voltage monitor ICGB 13   b  for monitoring the voltage is connected, and the power supplied from the power source GB 13  is monitored. The voltage monitor ICGB 13   b  has a reset function which, when signals indicative of abnormal drop in the power source (Battery Low) and the like is detected, resets the system to prevent an uncontrollable error, and has a watch dog function which monitors the normal operation of the system, and resets the system upon detection of a signal indicative of abnormality (WDI pulse signal) from the FPGA circuit GB 5 . Further, the voltage monitor ICGB 13   b  includes a backup function, and monitors the voltage at the power source terminal. When the voltage detected falls below a threshold, the power source terminal is switched to a backup power source terminal. 
     The FPGA circuit GB 5  is connected to the connector CN 4  so as to enable one-way data communications from the connector CN 4  via a latch circuit (Latch Logic) GB 14 . From the connector CN 4 , SD-SEN (Shut Down Output) signals, PSD-SENS1, 2 signals, LOGIC-SEA 2 to 4 signals are transmitted to the FPGA circuit GB 5  via the latch circuit GB 14 . To the latch circuit GB 14 , power is supplied from a power source GB 13  via a slide switch GB 13   a  which selects the powering destination. 
     The FPGA circuit GB 5  is connected to the connector CN 4  so as to enable reception of data transferred in one-way communications, and transmits push switch output (nPSW-OUT) signals and reset output (nRESET-OUT) signals. Further, the FPGA circuit GB 5  is connected to the connector CN 5  so as to enable reception of data transferred in one-way communications, and receives AC/CUT signals. Further, the FPGA circuit GB 5  is connected to a 4-bit JP switch GB 15 . 
     The AXGMEM substrate GB has a USB terminal (Type A) GB 16  connected to a connector CN 6  so as to enable two-way data communications. 
     (Electrical Structure: APX Motherboard AM) 
     Next, the following describes an electrical structure of the APX motherboard AM. As shown in  FIG. 100 , the APX motherboard AM has fourth Generation Intel® Core Processor (Haswell) AM 10 , with 20 EUs which are each an image process execution unit in a GPU core. It should be noted that the processor AM 10  is mounted to a LGA1150 CPU socket produced by Intel Corporation. 
     The processor AM 10  has therein a memory controller, and the PCI Express controller, and has a function corresponding to the northbridge (MCH). This way, the APX motherboard AM achieves a lower power consumption than a case of having a function corresponding to the northbridge (MCH) in the form of sub chip. The processor AM 10  has a PCI-E bus (100 MHz) with 16 lanes, and is connected to an extension slot AM 1  of PCI-EX16 Slot (Gen3) standard via this PCI E bus (See  FIG. 97A ). Further, the APX motherboard AM is powered by 8+24-pin connector AM 6 . 
     Further, the processor AM 10  is connected to in total of 4 dual-channel memory slots (memory slot AM 5  of  FIG. 91 ) of 128-bit, i.e., Channel A slots AM 11   a  and AM 12   a , and Channel B slots AM 11   b  and AM 12   b  so as to enable two-way data communications. In each of the memory slots, a DDR3 SRAM of DDR3-1333 or DDR3-1600 standard is mounted. Further, the processor AM 10  is connected to DP (Display ports) connectors SK 85   a  and SK 85   b  via digital ports C and D so as to enable one-way data communications. The processor is further connected, via a digital port B, to DVI-I connector AM 13  capable of transmitting both analog and digital video signals so as to enable one-way data communications. 
     The APX motherboard AM has a PCH (Linux Point B 85 ) chipset AM 20 , an Intel produced chipset. The PCH chipset AM 20  has a function of southbridge that controls I/O-related devices such as Serial ATA and USB. The PCH chipset AM 20  and the processor AM 10  are connected, and are capable of performing two-way data communications via a bus AM 15  with the connection mode of DMI (Direct Media Interface) and a bus AM 16  with a connection mode of FDI (Flexible Display Interface). 
     The PCH chipset AM 20  is connected to a plurality of high-speed USB ports AM 21  of the USB2.0 standards with a transfer rate of 480 Mb/s, in such a manner that two-way data communications is possible. Of the high-speed USB port, there are 6 high-speed USB ports (USB connectors SK 82   a , SK 82   b , SK 88   a , SK 88   b , SK 90   a , SK 90   b  shown in  FIG. 97A ). 
     The PCH chipset AM 20  is connected to an audio codec chip (ALC892 produced by Realtek) AM 22  of 24 MHz so as to enable two-way data communications. The audio codec chip AM 22  is connected to two SPDIF of channels ChA and ChB. The SPDIF is a standard for digital transfer of audio signals in an audio visual apparatuses. The PCH chipset AM 20  is connected, via PCIEx1 buses, to two network controller chips (RTL8111E10/100/1000 produced by Realtek) AM 23   a  and AM 23   b  of 100 MHz so as to enable two-way data communications. The PCH chipset AM 20  is further connected, via an analog port AM 13   a , to DVI-I connector AM 13  so as to enable one-way data communications. 
     The PCH chipset AM 20  is further connected, via buses of SATA3 standard, to four SATA3 ports (connectors for SATA substrate shown in  FIG. 97A ) AM 2  so as to enable one-way data communications. The PCH chipset AM 20  is further connected, via SPI (Serial Peripheral Interface) bus, to SPI FLASH port AM 24  so as to enable one-way data communications at 64 Mb. The PCH chipset AM 20  is further connected, via a plurality of PCIEx1 buses, to a plurality of PCIEx1 Slots AM 25   a , AM 25   b , AM 25   c  so as to enable two-way data communications. The PCIEx1 slot AM 25   b  is connected to the PCI terminal part GB 3  on the AXGMEM substrate GB shown in  FIG. 99 . With this, the AXGMEM substrate GB is connected to the processor AM 10  via the PCH chipset AM 20 , the buses AM 15  and AM 16 . 
     The APX motherboard AM has an SIO (Super I/O: NCT6627UD produced by Nuvoton) chip AM 30 . The SIO chip AM 30  is an I/O integrated circuit for a motherboard, and is a combination of interfaces of various low bandwidth devices. The PCH chipset AM 20  and the SIO chip AM 30  are connected so as to enable two-way data communications at 33 MHz, by an LPS (Low Pin Count) bus AM 25  for connecting low bandwidth devices (legacy devices connected by the SIO chip). It should be noted that the LPS bus AM 25  is connected to the TPM (Trusted Platform Module) header AM 26  so as to enable one-way data communications. The TPM is a security chip having a hardware tamper resistance, for the sake of security. 
     The SIO chip AM 30  is connected to the RS232C COM ports SK 87  and SK 91  (see  FIG. 97A ) via ports A and B so as to enable two-way data communications. The SIO chip AM 30  is connected to the PS2 KB/MS combo con AM 31  via a KB/MS bus so as to enable two-way data communications. The SIO chip AM 30  is further connected to the DGIO header AM  32  via a GPIOx8 bus so as to enable two-way data communications. The SIO chip AM 30  is further connected to the COM ports AM 33   a  to  33   d  of RS232, RXD, TXD, and GND via internally arranged ports C, D, E, and F, respectively, so as to enable two-way data communications. The SIO chip AM 30  is further connected to the CPU or the fan AM 34  disposed inside the casing via a FAN bus so as to enable two-way data communications. The fan AM 34  is usually connected to a 3-pin connector. 
     (Electrical Structure: Sub I/O Substrate SI 3 ) 
     Next, the following describes an electrical structure of the sub I/O substrate SI 3 . As shown in  FIG. 101 , the sub I/O substrate SI 3  has a power source connector (CN 1 ) SI 35   a . From this power source connector SI 35   a , a voltage of 12 V is input to a regulator SI 35   b  having an ON/OFF function. From the regulator SI 35   b  is output voltages of 5 v, 3.3V, and 1.8V. Of these voltages, 3.3V voltage is input to a USB reset circuit SI 35 C. Further, the sub I/O substrate SI 3  has a USB connector (CN 2 ) SK 82   a . The USB connector SK 82   a  is connected to a memory expansion module (MAX 5 ) SI 30 , via ferrite core (FT 240 ) SI 30   c  based on the USB2.0 standard, so as to enable two-way data communications. 
     Here, the memory expansion module SI 30  is connected to DIP (Dual In-line Package) switch SI  34   a , JTAG SI 34   b,  25 MHz XTAL SI 34   c , and a reset signal SI 34   d  (reset unit) so as to enable one-way data communications. 
     The sub I/O substrate SI 3  further has a connector CN 8 , and as an option, may further have a power source monitoring circuit SI 30   b . The power source monitoring circuit SI 30   b  is connected to the memory expansion module SI 30  so as to enable one-way data communications. 
     The sub I/O substrate SI 3  has a control panel connector (CN 3  (½)) CP 1   a , and is connected to the memory expansion module SI 30  via a low pass filter circuit SI 33  so as to enable one-way data communications. It should be noted that the sub I/O substrate SI 3  may have an I/O connector (CN 6  (½)) SI 33   a , and may be connected to the memory expansion module SI 30  via the low pass filter circuit SI 33  so as to enable one-way data communications. 
     The memory expansion module SI 30  is connected to a pilot LED SI 30   d  so as to enable one-way data communications. It should be noted that the sub I/O substrate SI 3  has a pilot LED SI 30   e  to which power of 3.3V is input. The memory expansion module SI 30  is connected to a transistor circuit SI 32  so as to enable one-way data communications. Further, the memory expansion module SI 30  and the transistor circuit SI 32  are connected to an LED output connector (CN 7 ) CP 1   b  so as to enable one-way data communications. It should be noted that the memory expansion module SI 30  is connected to the LED output connector (CN 7 ) CP 1   b  via an LED driver (TLC5922) SI 30   f  so as to enable one-way data communications. Further, the transistor circuit SI 32  is connected to the memory expansion module SI 30  via a meter cut circuit SI 30   a  so as to enable one-way data communications. 
     The transistor circuit SI 32  outputs power save signals and 3.3V USB restart signals. Further, the transistor circuit SI 32  is connected to a control panel connector (CN 3  (2/2))  4353  and a mechanical counter connector (CN 4 ) CT so as to enable one-way data communications. It should be noted that the transistor circuit SI 32  may be optionally connected to an I/O connector (CN 6  (2/2)) so as to enable one-way data communications. 
     It should be noted that there may be optionally provided a power save connector (CN 5  (½)) S 136   b  connected to an NchMOSFET circuit SI 36   a  to which power save signals are input so as to enable one-way data communications. 
     (Electrical Structure: DPDAMP Substrate DD) 
     Next, the following describes an electrical structure of the DPDAMP substrate DD. As shown in  FIG. 102A , the DPDAMP substrate DD includes: an input end DP connector DD 1 , a video output DP connector DD 3 , and an audio output connector DD 4 . The input end DP connector DD 1  is connected to the second display port connector SK 85   b  shown in  FIG. 97A  so as to enable one-way data communications. 
     The input end DP connector DD 1  is connected to a receiver (LQFP144P) DD 10  serving as a video output interface in compliance with a display port 1.1a standard so as to enable one-way data communications, and receives audio and video sources. Further, the receiver DD 10  is connected to a transmitter (LQFP144P) DD 11  in compliance with the display port 1.1a standard, via an RGB cable and a bus, so as to enable one-way data communications, and outputs video signals. From the receiver DD 10  is transmitted analog RGB output signals. Further, between the receiver DD 10  and the transmitter DD 12  is connected a memory control unit (MCU) DD 12 , and memory related controls are performed. To the transmitter DD 11  is connected a video output DP connector DD 3  via a DP (display port) cable so as to enable one-way data communications, and a video is output to the lower side liquid crystal display panel  4254 . 
     The receiver DD 10  is connected to an audio codec (CS4361) DD 20  so as to enable one-way data communications. The receiver DD 10  extracts at least a part of audio signals from the source of audio and video, transmits the at least a part of the audio signals to the audio codec DD 20 , and transmits the rest of audio signals to a transmitter (LQFP144P) DD 11  This way, the receiver DD 10  is able to extract the audio signals for the playing timing. The audio codec DD 20  is connected to three audio power amplifiers (TPA3110D2) DD 21  to DD 23  so as to enable one-way data communications, and digital signals are converted into analog signals. The audio power amplifiers DD 21  and DD 22  are connected to an audio output connector DD 4 . The audio output connector DD 4  is connected to speakers  433   a  and  433   b , and to the speaker device SP 1 . 
     It should be noted that the DPDAMP substrate DD may have an output end DP connector DD 5 , as shown in  FIG. 102B . In this case, DPDAMP substrate DD is daisy chained to the output end DP connector DD 5  as shown in  FIG. 97B . Therefore, an additional display device or an additional speaker is easily provided. As indicated by the dotted arrow in  FIG. 102B , audio visual signals transmitted from the transmitter (LQFP144P) DD 11  to the video output DP connector DD 3  are branched off and transmitted to the output end DP connector DD 5 . With this structure, the audio signals branched off from the signals transmitted from the transmitter (LQFP144P) DD 11  to video output DP connector DD 3  are transmitted to another DPDAMP substrate DD via the output end DP connector DD 5 , and are subjected to the processing described above in the other DPDAMP. It should be noted that the branched signals contains audio signals (the above mentioned rest of the audio signals) transmitted from the receiver DD 10  to the transmitter (LQFP144P) DD 11 . As should be understood, by daisy-chaining the DPDAMP substrates DD, sets of audio data output at different timings from the speakers  433   a  and  433   b , and the speaker device SP 1  are collectively output from the second display port connector SK 85   b . As indicated by the solid arrow in  FIG. 102B , audio visual signals transmitted from the input end DP connector DD 1  to the receiver DD 10  may be branched off and transmitted to the output end DP connector DD 5 . In this case, it is not necessary to adopt a structure of transmitting, from the receiver DD 10  to the transmitter (LQFP144P) DD 11 , the above mentioned rest of the audio signals (i.e., the signals remaining after excluding, from the received digital audio signals, the audio signals transmitted to the audio codec DD 20 ). 
     (Data Structure in SSD Substrate SD 2 ) 
     The SSD substrate SD 2  has a memory volume of 4 GB. The SSD substrate SD 2  stores, in the form of digital data, base codes and game codes needed for running games, and a system for satisfying special matters defined by an organization for official applications (medium audit and identification). The SSD substrate SD 2  is connected to the APX motherboard AM in compliance with SATA. Public keys are used for authentication, in which signatures of each region is used for authenticating another region successively to authenticate the OS/game system. 
     It should be noted that the SSD substrate SD 2 , provided that the power is supplied from the power source device, may store door-open/close log to keep the record of time when the doors such as the upper door device  42  are opened. The SSD substrate SD 2  may also store the door-open/close log even when the power supply from the power source device is stopped due to breakdown or shutting down. 
     The data arrangement of the SSD substrate SD 2  is sorted into a boot region and a data region. The data region is parted by three partitions as shown in  FIGS. 103A and 103B . The SSD substrate SD 2  is divided in units of 512 bytes per sector. To each of the sectors is assigned an address of LBA (Logical Block Address). 
     The following details specification of each region of the SSD substrate SD 2 . To the boot loader region are placed boot loader and HMAC-SHA1 information. The HMAC-SHA1 information is saved in a designated address.  FIG. 104  shows data placement of the boot region. Non-used portions are filled with zeros (Reserved). 
     As shown in  FIG. 105 , the boot loader is used for executing a main boot loader in a first partition region. The boot loader region includes a partition table defining the starting position and the size of each partition. These pieces of data are placed according to commonly used MBR (Master Boot Record). 
     The HMAC-SHA1 information is used for auditing SSD substrate SD 2 . This region stores HMAC-SHA1 value of each partition, and non-used portions are filled with zeros (Reserved). The HMAC-SHA1 value of 20 bytes is RSA-encrypted and stored in a bit string of 128 bytes. 
     The boot loader is used for executing a main boot loader in a first partition region. The boot loader region stores the partition table defining the starting position and the size of each partition. These pieces of data are placed according to commonly used MBR (Master Boot Record). 
     The HMAC-SHA1 information is used for auditing SSD substrate SD 2 . This region stores HMAC-SHA1 value of each partition, and non-used portions are filled with zeros (Reserved). The HMAC-SHA1 value of 20 bytes is RSA-encrypted and stored in a bit string of 128 bytes. The boot loader HMAC-SHA1 is intended only for the boot loader region, and stores the RSA-encrypted HMAC-SHA1 value from the 0x0000 bytes at the leading end of the information portion. A first partition HMAC-SHA1 is intended only for the first partition region, and stores the HMAC-SHA1 value RSA-encrypted into 128 bytes from the 0x0080 bytes at the leading end of the information portion. 
     As shown in  FIG. 105 , the first partition region adopts a file system format (SquashFS) readable by Linux® kernel, and stores a Linux operating system (Hereinafter, OS) and a self-authentication program for checking the OS.  FIG. 105  shows data placement of the first partition region. Non-used portions are filled with zeros (Reserved). 
     A Linux system is a main component of the OS including a main boot loader, Linux kernel, and boot codes, and manages inputs/outputs and processes of various devices needed for executing base codes and game codes. The main boot loader is software directly executed by the boot loader placed in the boot record. In the main component of the boot loader, the Linux kernel and the boot codes are loaded to the main memory to activate the Linux. 
     The Linux kernel is a kernel used in a Linux system, and is loaded to the main memory and executed by the main boot loader. The boot codes are initializing codes executed by the Linux kernel, and is loaded to the main memory by the main boot loader and executed by the Linux kernel. The self-authentication program is used at a time of booting, and is a program for verifying a signature by comparing the HMAC-SHA1 value stored with a calculated HMAC-SHA1 value. 
     As shown in  FIG. 106 , the second partition region adopts a file system format (Ext4) readable by Linux kernel. In this file system, base codes are filed in the form of file.  FIG. 106  shows data placement of the second partition region. 
     The base codes are software for controlling basic operations of a gaming machine, and provides functions needed for operations based on the game codes. A 128 byte bit string which is RSA encryption of the HMAC-SHA1 value, i.e., the base codes without the last 512 bytes, is stored in the 0x0000 bytes which is the leading end of the HMAC-SHA1 information portion. 
     As shown in  FIG. 107 , a third partition region adopts a file system format (Ext4) readable by Linux kernel. In this file system, game codes are filed in the form of file.  FIG. 107  shows data placement of the third partition region. 
     The game codes are software that controls operations of a game, and various games are run by changing this software. All the game codes are executable by common base codes. A 128 byte bit string which is RSA encryption of the HMAC-SHA1 value, i.e., the game codes without the last 512 bytes, is stored in the 0x0000 bytes which is the leading end of the HMAC-SHA1 information portion. 
     (Program Authentication) 
     The program authentication is detailed referring to  FIG. 108  and  FIG. 109 . Namely, the “Boot BIOS self-authentication” includes the following steps A 1  to A 5 . Step A 1 : The Boot BIOS program in the Flash ROM is loaded to the main memory and started, after powering ON. Step A 2 : The Boot BIOS program reads in a public key A. Step A 3 : The Boot BIOS program reads in a signature  1  of the Flash ROM region, and decodes the same with the public key A. Step A 4 : The Boot BIOS program calculates the HMAC-SHA1 value of the Flash ROM region. Step A 5 : The value decoded in Step A 3  is compared with the value calculated in Step A 4 . If these values are equal to each other, the process proceeds to the OS authentication. On the other hand, an error is output if the values are different, and the booting process is stopped. 
     The “OS authentication” includes the following steps B 1  to B 5 . Step B 1 : The Boot BIOS program reads in a public key B from the Flash ROM. Step B 2 : The Boot BIOS program reads in a signature of the boot record region, and decodes the same with the public key B. Step B 3 : The Boot BIOS program calculates the HMAC-SHA1 value of the boot record region. Step B 4 : The Boot BIOS program calculates the HMAC-SHA1 value of the partition  1 . Step B 5 : The value decoded in Step B 2  is compared with the values calculated in Step B 3  and Step B 4 . If these values are equal to one another, the OS in the partition  1  is loaded to the main memory and started. On the other hand, an error is output if the values are different, and the booting process is stopped. 
     The “Flash ROM Authentication” includes the following steps C 1  to C 4 . Step C 1 : The authentication program in the partition  1  reads in the public key A from the Flash ROM. Step C 2 : The authentication program in the partition  1  reads in a signature  2  of the Flash ROM region, and decodes the same with the public key A. Step C 3 : The authentication program in the partition  1  calculates the HMAC-SHA1 value of the Flash ROM region. Step C 4 : The value decoded in Step C 2  is compared with the value calculated in Step C 3 . If these values are equal to each other, the process proceeds to the base code authentication. On the other hand, an error is output if the values are different, and the booting process is stopped. 
     The “Base code authentication” includes the following steps C 5  to C 9 . Step C 5 : The authentication program in the partition  1  (Hereinafter, authentication program) checks if there is any file other than BaseCode.bin in the partition  2 . If there is no other file, the process proceeds to Step C 2 . On the other hand, an error is output if there is another file, and the booting process is stopped. Step C 6 : The authentication program reads in a public key C from the Flash ROM. Step C 7 : The authentication program reads in a signature embedded at the end of the BaseCode.bin in the partition  2 , and decodes the same with the public key C. Step C 8 : The authentication program calculates the HMAC-SHA1 of the BaseCode.bin in the partition  2 . Step C 9 : The value decoded in Step C 3  is compared with the value calculated in Step C 4 . If these values are equal to each other, the process proceeds to the Game Authentication. 
     The “Game Authentication” includes the following steps D 5  to D 9 . Step D 1 : The authentication program in the partition  3  checks if there is any file other than Game.bin in the partition  3 . If there is no other file, the process proceeds to Step D 2 . On the other hand, an error is output if there is another file, and the booting process is stopped. Step D 2 : The authentication program reads in a public key D from the Flash ROM. Step D 3 : The authentication program reads in a signature embedded at the end of the Game.bin in the partition  3 , and decodes the same with the public key D. Step D 4 : The authentication program calculates the HMAC-SHA1 of the Game.bin in the partition  3 . Step D 5 : The value decoded in Step D 3  is compared with the value calculated in Step D 4 . If these values are equal to each other, transition to the boot sequence occurs. 
     (Boot Sequence) 
     Next, the following details the boot sequence. As shown in  FIG. 110A , the Boot BIOS self-authentication runs upon powering on. Specifically, the Boot BIOS is loaded to the main memory (ST 1 ). 
     The Boot BIOS reads in a public key A from the Flash ROM (ST 2 ). 
     The Boot BIOS program reads in a signature embedded in the Flash ROM region, and decodes the same with the public key A to obtain an HMAC-SHA1 value (ST 3 ). The HMAC-SHA1 value of the Flash ROM region is calculated (ST 4 ). Whether or not the approval is obtained from the authentication of the Flash ROM region (HMAC-SHA1 comparison) is determined (ST 5 ). 
     If approval is not obtained (ST 5 : NO), an error is displayed, and the booting process is stopped (ST 6 ). 
     On the other hand, if the approval is obtained (ST 5 : YES), a Boot Record and Partition Authentication process is executed. Specifically, the Boot BIOS program reads in a public key B from the Flash ROM (ST 7 ). The Boot BIOS program reads in a signature embedded in the Boot Record region, and decodes the same with the public key B to obtain an HMAC-SHA1 value (ST 8 ). The Boot BIOS program calculates the HMAC-SHA1 values of the Boot Record region and the data region of the partition  1  (OS) (ST 9 ). Whether or not the approval is obtained from the authentication of the Boot Record region and the partition  1  (HMAC-SHA1 comparison) is determined (ST 10 ). If approval is not obtained (ST 10 : NO), an error is displayed, and the booting process is stopped (ST 11 ). 
     On the other hand, as shown in  FIG. 110B , if the approval is obtained (ST 10 : YES), the OS in the SSD substrate SD 2  is loaded to the main memory (ST 12 ). The OS is then started (ST 13 ). After that, the Boot BIOS Authentication process is executed. Specifically, the authentication program in the partition  1  reads in the public key A from the Flash ROM (ST 14 ). The authentication program in the partition  1  reads in a signature embedded in the Flash ROM region, and decodes the same with the public key A to obtain an HMAC-SHA1 value (ST 15 ). The HMAC-SHA1 value of the Flash ROM region is calculated (ST 16 ). Whether or not the approval is obtained from the authentication of the Flash ROM region (HMAC-SHA1 comparison) is determined (ST 17 ). If approval is not obtained (ST 17 : NO), an error is displayed, and the booting process is stopped (ST 18 ). 
     On the other hand, if the approval is obtained (ST 17 : YES), a partition  2  authentication process is executed. Specifically, whether or not the partition  2  contains only BaseCode.bin is determined (ST 19 ). If there is data other than BaseCode.bin (ST 19 : NO), an error is displayed, and the booting process is stopped (ST 20 ). On the other hand, if there is only BaseCode.bin (ST 19 : YES), the self-authentication program reads in a public key C from the Flash ROM (ST 21 ). The self-authentication program reads in a signature embedded at the end of the BaseCode.bin in the partition  2 , and decodes the same with the public key C to obtain an HMAC-SHA1 value (ST 22 ). The HMAC-SHA1 value of the BaseCode.bin excluding the size of the signature is calculated (ST 23 ). Whether or not the approval is obtained from the authentication of the BaseCode.bin (HMAC-SHA1 comparison) is determined (ST 24 ). If approval is not obtained (ST 24 : NO), an error is displayed, and the booting process is stopped (ST 25 ). 
     On the other hand, if the approval is obtained (ST 25 : YES), a partition  3  authentication process is executed, as shown in  FIG. 110C . Specifically, whether or not the partition  3  contains only Game.bin is determined (ST 26 ). If there is data other than Game.bin (ST 26 : NO), an error is displayed, and the booting process is stopped (ST 27 ). On the other hand, if there is only Game.bin (ST 26 : YES), the self-authentication program reads in a public key D from the Flash ROM (ST 28 ). 
     The self-authentication program reads in a signature embedded at the end of the Game.bin in the partition  3 , and decodes the same with the public key D to obtain an HMAC-SHA1 value (ST 29 ). The HMAC-SHA1 value of the Game.bin excluding the size of the signature is calculated (ST 30 ). Whether or not the approval is obtained from the authentication of the Game.bin (HMAC-SHA1 comparison) is determined (ST 31 ). If approval is not obtained (ST 31 : NO), an error is displayed, and the booting process is stopped (ST 32 ). On the other hand, if the approval is obtained (ST 31 : YES), the BaseCode.bin in the partition  2  and the Game.bin in the partition  3  are loaded to the main memory (ST 33 ). The process then proceeds to boot sequence (ST 34 ). Then, after the work memory and sensors in the memory substrate MM 6 , the driving mechanism, illumination, and the like are checked in the boot sequence, a demo screen is displayed and the process proceeds to a game running process. 
     It should be noted that, at a time of booting, a unique identification number written in at the time of manufacturing may be read out to check if the SSD substrate SD 2  is a counterfeit substrate or not, and if it is, the booting process may be stopped or there may be a report that the SSD substrate SD 2  is a counterfeit substrate after the booting. 
     (Game Running Process) 
     When the game running process starts, the main CPU executes a credit request process (S 10 ). In this process, the player determines how many credits are used from the credits stored in the IC card. 
     Then whether a coin is bet is determined (S 11 ). When it is determined that no coin is bet (S 11 : NO), the process goes back to S 10 . In the meanwhile, if it is determined in S 11  that a coin is bet (S 11 : YES), a process of decreasing the number of credits stored in the RAM  73  in accordance with the number of coins bet is executed (S 12 ). When the number of coins bet is larger than the number of credits, the step of decreasing the number of credits is not carried out and the process goes back to S 11 . When the number of coins bet is larger than the maximum number of coins on one game, the step of decreasing the number of credits stored in the RAM  73  is not carried out and the process proceeds to S 13 . 
     Then whether the button switch CP 1  (start button) is pressed is determined (S 13 ). When the start button is not pressed (S 13 : NO), the process goes back to S 13 . It is noted that, when the start button is not pressed (e.g., when an instruction to end a game is input while the start button is not pressed), the reduction result in S 12  is canceled. 
     In the meanwhile, if it is determined in SI 3  that the start button is pressed (S 13 : YES), a normal game symbol determination process is executed (S 14 ). In the normal game symbol determination process, code numbers when the symbols are stopped are determined. More specifically, a random number is sampled, and the code number when each symbol array of the reel device M 1  stops is determined based on the sampled random number and a normal game symbol table. 
     Then a scroll display control process is executed. In this process, the display control is conducted so that, after the start of the scroll of the symbols by rotating each reel M 3  of the reel device M 1 , the symbols determined in S 14  are rearranged. 
     Thereafter, whether a prize is established is determined (S 16 ). Regarding the symbols rearranged in accordance with S 15 , the number of symbols of each type rearranged on each payline L is counted. Then whether the number of the symbols of each type is at least two is determined. Furthermore, whether a predetermined number or more of trigger symbols such as scatter symbols are rearranged irrespective of the paylines L is determined. 
     When a prize is not established in S 16  (S 16 : NO), the routine is terminated. When it is determined that a prize is established (S 16 : YES), a step concerning the payout of coins is executed (S 17 ). In this step, for example, a payout rate is determined with reference to odds data and based on the number of symbols rearranged on a payline L. The odds data indicates the relationship between the number of symbols rearranged on a payline L and a payout rate. Each time one “WILD” is displayed on a payline L where winning is established, the payout is doubled. That is to say, when three “WILD” are displayed on a payline L where winning is established, the payout is multiplied eight times. 
     A prize may be established when at least one type of two or more symbols are rearranged on a payline L, or, when no payline L is provided, a prize may be established when at least one type of two or more symbols are rearranged. 
     Subsequently, whether a trigger condition is established as a result of the rearrangement of a predetermined number or more of trigger symbols such as scatter symbols is determined (S 18 ). When the trigger condition is not established (S 18 : NO), the routine is terminated. In the meanwhile, when the trigger condition is established (S 18 : YES), a bonus game execution process is executed (S 19 ). 
     (Temperature Management Process) 
     When the game is being run by the game running process as above, a temperature management process is being executed. In the temperature management process, a first temperature sensor and a second temperature sensor with different monitored temperatures are provided in the power source unit RU, and an error process (error leaving, lockup, or the like) is performed during a game upon the detection by the first temperature sensor with a low temperature setting, and immediate shutdown is performed upon the detection by the second temperature sensor with a high temperature setting. The monitored temperatures of the first temperature sensor are a first threshold temperature and a second threshold temperature which is lower than the first threshold temperature. The monitored temperature of the second temperature sensor is a third threshold temperature which is higher than the first threshold temperature. The first temperature sensor is arranged to output a first power source temperature detection signal which is turned on when the temperature is not lower than the first threshold temperature and is turned off when the temperature is not higher than the second threshold temperature. The second temperature sensor outputs a second power source temperature detection signal which is turned on when the temperature is not lower than the third threshold temperature. 
     While in the present embodiment the first temperature sensor and the second temperature sensor output sensor signals indicating the first threshold temperature and the like, the disclosure is not limited to this arrangement. For example, the following arrangement may be employed: the first temperature sensor and the second temperature sensor output sensor signals of voltage or current values in proportion to a detected temperature, as digital or analog amounts, and a control device determines the first threshold temperature based on the sensor signals and a first threshold, determines the second threshold temperature based on the sensor signals and a second threshold, and determines the third threshold temperature based on the sensor signals and a third threshold. 
     The temperature management process includes a first temperature management process shown in  FIG. 112  and a second temperature management process shown in  FIG. 113 , and is executed in parallel to the game running process. The first and second temperature management processes are not executed before the game activation with which the game running process starts, and are executed once before an idle state is set and then executed repeatedly at intervals of one minute or shorter, after the game activation with which the game running process starts. 
     (Temperature Management Process: First Temperature Management Process) 
     In the first temperature management process, an error process and an error cancellation process are executed based on a signal from the first temperature sensor mounted on the power source device. The error process is executed when the first temperature sensor outputs the first power source temperature detection signal in the on state. The error cancellation process is executed when the first temperature sensor outputs the first power source temperature detection signal in the off state. When the error process is being executed, the occurrence of an error in the power source device is notified to the player or the like as a power source device error is displayed on an error meter. 
     To be more specific, the first power source temperature detection signal output from the first temperature sensor of the power source device is monitored by the second GM substrate GM 2 , and the second GM substrate GM 2  executes the first temperature management process based on the first power source temperature detection signal. 
     As shown in  FIG. 112 , to begin with, whether the first power source temperature detection signal is in the on state is determined. The error process is executed when the signal is turned on, i.e., when the temperature of the power source device reaches the first threshold temperature (S 101 ). Thereafter, whether a game is in progress is determined (S 102 ). When the game is in progress (S 102 : YES), whether 5 minutes have passed after the first threshold temperature is reached is determined (S 103 ). When 5 minutes have not passed (S 103 : NO), the steps are executed until the end of the game (completion of credit transfer) to finish the game which is currently run (S 104 ). Then an error occurrence process (lockup state) is executed (S 105 ). When the game is not in progress in S 102  (S 102 : NO), the error occurrence process (lockup state) is executed (S 105 ). 
     Subsequently, shifting to a power save mode is automatically done (S 106 ), and whether resetting is to be executed based on a reset signal which is output in response to the pressing of the reset key switch RS is determined (S 109 ). When the resetting is not executed (S 109 : NO), the device is on standby in the power save mode. 
     In the meanwhile, when the resetting is executed (S 109 : YES), whether the first power source temperature detection signal is in the off state is determined, and whether the temperature of the power source device has reached the second threshold temperature due to temperature decrease is determined (S 110 ). When the temperature has not reached the second threshold temperature (S 110 : NO), shifting to S 105  is executed and the error process is continued. In the meanwhile, when the temperature has reached the second threshold temperature (S 110 : YES), the error process is canceled, and whether there is a not-yet-run game is determined (S 111 ). When there is such a not-yet-run game (S 111 : YES), the game is run (S 112 ) and then shifting to the idle state is executed (S 113 ). In the meanwhile, when there is no not-yet-run game (S 111 : NO), shifting to the idle state is executed (S 113 ). 
     (Temperature Management Process: Second Temperature Management Process) 
     In the second temperature management process, the power source substrate executes a shutdown process based on a signal from the second temperature sensor mounted on the power source device. The shutdown process is executed when the second temperature sensor outputs the second power source temperature detection signal in the on state. 
     To be more specific, the second power source temperature detection signal output from the second temperature sensor of the power source device is monitored by the power source substrate, and the power source substrate executes the second temperature management process based on the second power source temperature detection signal. As shown in  FIG. 113 , whether the second power source temperature detection signal is in the on state is determined. When the signal is turned on, i.e., when the temperature of the power source device reaches the third threshold temperature (S 201 ), the output of the electric power from the power source device to all substrates is turned off, and the state becomes identical with the power off state (S 202 ). 
     If there is a not-yet-run game when the temperature reaches the third threshold temperature, the output of the electric power from the power source device to all substrates may be turned off after the game which is currently run is finished. Furthermore, it is preferable to arrange the operation not to be stopped due to the error process, until a credit is recorded in response to the insertion of a bill or a ticket. This is because, without such an arrangement, the inserted bill or ticket is not recorded as a credit. Furthermore, preferably, the error process is not executed while the cash out button is pressed and a ticket is being issued, and the error process starts after the completion of the issuance of the ticket. Furthermore, preferably, the error process immediately starts during another error or when a door is open. 
     Embodiment 2 
     Next, Embodiment 2 of the present invention is described below. It should be noted that the following description of Embodiment 2 mainly deals with the topper device  2  which is a difference from the slot machine  1 , and the members identical to those described in Embodiment 1 are given the same reference symbols. 
     (Outline of Topper Device T 2 ) 
     As shown in  FIG. 114 , the topper device T 2  is provided on the top wall of the top device  3  (gaming machine main body  5 ) shown in  FIG. 1  so as to be in the highest position of the slot machine  1 . The topper device T 2  has an illumination mechanism T 3  for emitting illumination light to the surrounding environment. The topper device T 2  has a function of making the slot machine  1  noticeable from a distant position, which is exerted in relation to the forward, while exerting the same to the sides and the back. 
     (Detailed Structure of Topper Device T 2 ) 
     As shown in  FIG. 114 , the topper device T 2  has a topper main body T 21  having a display surface T 2   a , and a tower member T 22  provided on the top wall of the topper main body T 21 . The tower member T 22  has a cylindrical cover made of a transparent resin, and has therein a light emitting device such as LED. At the uppermost part of the slot machine  1 , the tower member T 22  lights in a single color or in a plurality of colors, thereby improving the visibility of the slot machine  1  from a distant position. 
     As shown in  FIG. 115 , the topper main body T 21  includes: a topper support mechanism T 215  supporting the topper device T 2  on top of the top device  3 ; a topper display device T 211  disposed on the front side of the topper support mechanism T 215  and configured to display the game content and a game title of the slot machine  1 ; a topper front cover T 214  accommodating therein the topper display device T 211 ; a frame member T 218  disposed on the front side of the topper front cover T 214  and decorates the periphery of the topper display device T 211 ; a topper rear cover T 212  disposed on the back side of the topper support mechanism T 215  and jointed to the topper front cover T 214 ; and an illumination mechanism T 3  provided to the topper front cover T 214  and the topper rear cover T 212  and configured to emit illumination light to the surrounding environment. 
     (Topper Support Mechanism T 215 ) 
     As shown in  FIG. 116 , the topper support mechanism T 215  includes: an upper sideway member T 2151  horizontally displayed; a lower sideway member T 2152  horizontally disposed below the upper sideway member T 2151 ; an upper upright member T 2153  linking middle portions of the upper sideway member T 2151  and the lower sideway member T 2152 ; a right upright member T 2155  linking right end portions of the upper sideway member T 2151  and the lower sideway member T 2152 ; a left upright member T 2156  linking left end portions of the upper sideway member T 2151  and the lower sideway member T 2152 ; a lower upright member T 2154  whose upper end portion is jointed to the middle portion of the under surface of the lower sideway member T 2152 ; and a fixing member T 2157  jointed to the lower end portion of the lower upright member T 2154  and fixed to the Top device  3  shown in  FIG. 1  by screw fastening. 
     As shown in  FIG. 117 , the upper sideway member T 2151  includes a front wall T 21511 , a top wall T 21512 , a right side wall T 21513 , and a left side wall T 21514  which form a rectangular shape. To both end portions of the front wall T 21511  are formed through holes T 21511   a . The through holes T 21511   a  are each used as a screw hole for screw fastening the topper display device T 211 . To the middle portion of the under surface of the top wall T 21512  is jointed the upper end of the upper upright member T 2153 . To both end portions of the back side of the top wall T 21512  are formed first fastening portions T 21512   a  which are screw-fastened to the topper rear cover T 212 . To the middle portion of the back side of the top wall T 21512  are formed first fastening portions T 21512   a  which are screw-fastened to the topper rear cover T 212 . 
     The lower sideway member T 2152  includes a front wall T 21521 , a bottom wall T 21522 , a right side wall T 21523 , and a left side wall T 21524  which form a rectangular shape. To both end portions of the front wall T 21521  are formed through holes T 21521   a . The through holes T 21521   a  are each used as a screw hole for screw fastening the topper display device T 211 . To the top surface of the bottom wall T 21522  is jointed the lower end of the upper upright member T 2153 . To the under surface of the bottom wall T 21522  is jointed the upper end of the lower upright member T 2154 . 
     On the right upright member T 2155  and the left upright member T 2156 , upper light source substrates T 34  are symmetrically provided on the left and right with respect to the upper upright member T 2153 . On the right side surface and the left side surface of the lower upright member T 2154  are provided lower light source substrates T 35 . These upper light source substrates T 34  and the lower light source substrates T 35  constitute a part of the illumination mechanism T 3 . The details of the illumination mechanism T 3  are provided later. 
     (Topper Display Device T 211 ) 
     As shown in  FIG. 118 , the topper display device T 211  includes: a TP light guide base T 2111  fixed to the topper support mechanism T 215 , and a display plate module T 2117  disposed on the front surface of the TP light guide base T 2111 . The TP light guide base T 2111  is disposed in front of the backlight unit  23  shown in  FIG. 115 . The TP light guide base T 2111  is made of a transparent resin, and is capable of letting pass light from the backlight unit T 23 . The TP light guide base T 2111  includes: a front surface portion T 2111   a  having a rectangular shape when viewed from the front side, and a first abutting portion T 2111   e  protruding forward from the left-side middle portion of the front surface portion T 2111   a . The first abutting portion T 2111   e  is formed so as to protrude by a length longer than the thickness of the display plate module T 2117 , and abuts the left end of the display plate module T 2117 . 
     As shown in  FIG. 119 , the TP light guide base T 2111  has an attachment portion T 2111   b  in each corner portion on its back surface side. The attachment portion T 2111   b  has a through hole for screw-fastening and its leading end portion T 2111   c  is bent to extend backwards. With the leading end portions T 2111   c  inserted between the upper sideway member T 2151  and the lower sideway member T 2152  shown in  FIG. 118 , the TP light guide base  2111  is easily attached to the topper support mechanism T 215  of the topper display device T 211 , as shown in  FIG. 120 . 
     As shown in  FIG. 118 , to the upper end surface of the TP light guide base T 2111  is provided an upper side plate holder T 2112 . The upper side plate holder T 2112  includes: a planar portion T 2112   c  horizontally disposed along the upper side of the TP light guide base T 2111 , first holding portions T 2112   a  disposed on the left side portion and the right side portion at the front side of the planar portion T 2112   c , and a second holding portion T 2112   b  disposed in the middle portion on the front side of the planar portion T 2112   c . The first holding portions T 2112   a  are formed so as to stick out forward than the second holding portion T 2112   b , and forms a holding space parting the display plate module T 2117  between the first holding portions T 2112   a  and the second holding portion T 2112   b  in side view. 
     To the lower end surface of the TP light guide base T 2111  is provided a lower side plate holder T 2113 . The lower side plate holder T 2113  has the same structure as that of the above described upper side plate holder T 2112 , and is disposed vertically symmetrical to the upper side plate holder T 2112 . That is, the lower side plate holder T 2113  has a planer portion T 2113   c , first holding portions, and a second holding portion T 2113   b , and forms a holding space between the first holding portions T 2113   a  and the second holding portion T 2113   b  in side view. 
     (Topper Display Device T 211 : Display Plate Module T 2117 ) 
     The upper side plate holder T 2112  and the lower side plate holder T 2113  holds the display plate module T 2117  in the vertical direction and the forward/backward direction. Further, the display plate module T 2117  has its left end abut the first abutting portion T 2111   e  of the TP light guide base T 2111 , so that the first abutting portion T 2111   e  restricts leftward movements. 
     The display plate module T 2117  includes a light guiding plate T 21171 , a first base plate T 21172 , a design plate T 21173 , and a second base plate T 21174 . The light guiding plate T 21171  has a function of emitting light forward, from its front surface side. The first base plate T 21172  and the second base plate T 21174  are made of a transparent material and are formed into the same rectangular shape of the same size. The design plate T 21173  has an image suggestive of the game of the slot machine  1 . 
     The light guiding plate T 21171  is attached to the front surface portion T 2111   a  of the TP light guide base T 2111 , as shown in  FIG. 121 . As shown in  FIG. 122A  and  FIG. 122B , on the front side of the light guiding plate T 21171  are disposed the first base plate T 21172 , the design plate T 21173 ; and the second base plate T 21174 . The light guiding plate T 21171  emits a planer illumination light forward, from its entire front surface side. This makes the image on the design plate T 21173  visible from outside via the second base plate T 21174 . 
     The upper side portions of these plates T 21172 , T 21173 , T 21174  are sandwiched by the first holding portions T 2112   a  and the second holding portion T 2112   b  of the upper side plate holder T 2112 , and are held relative to the forward/backward directions in the holding space. The lower side portions of these plates T 21172 , T 21173 , T 21174  on the other hand are sandwiched by the first holding portions T 2113   a  and the second holding portion T 2113   b , and are held relative to the forward/backward directions in the holding space. 
     The design plate T 21173  abuts the first base plate T 21172  and the second base plate T 21174  and is capable of moving. As shown in  FIG. 121 , to the right side of the design plate T 21173  is an overhang portion T 21173   a . The overhang portion T 21173   a  protrudes to the right side beyond the second base plate T 21174 . Thus, it is possible to detach or attach only the design plate T 21173  from and to the topper display device T 211 , by using one hand to hold the second base plate T 21174  at the forefront position of the display plate module T 2117 , while using the other hand to hold the overhang portion T 21173   a  and move the same in the left/right direction. It should be noted that, in the topper display device T 211 , the display plate module T 2117  may be a display device such as a liquid crystal display device. 
     (Topper Rear Cover T 212 ) 
     As shown in  FIG. 123 , after the display plate module T 211  is attached to the topper support mechanism T 215 , the topper rear cover T 212  is subsequently attached while the tower member T 22  is attached. As shown in  FIG. 124 , the topper rear cover T 212  has a housing frame member T 2121  whose front surface is in a rectangular shape, and an upper rim portion T 2122  protruding from the peripheral edge of the housing frame member T 2121  towards the front side. To the housing frame member T 2121  of the topper rear cover T 212  are arranged a backlight unit T 23  such as a cold cathode tube and a fluorescent tube, and the like. On the left and right regions on the top wall of the upper rim portion T 2122  are formed a plurality of ventilation holes T 2121   a . Through the ventilation holes T 2121   a , the air inside the topper device T 2  heated by the backlight unit T 23  flows out, while the outside air flows inside the topper device T 2 . This way, cooling of the topper device T 2  is made possible. 
     On the left surface and the right surface of the upper rim portion T 2122  are formed a plurality of engagement portions T 2122   b . The engagement portions T 2122   b  are notches of a predetermined width on the upper rim portion T 2122 , which extends in the horizontal direction from its front end to the back end. The engagement portions T 2122   b  are formed at equal intervals in the vertical direction. As shown in  FIG. 125  and  FIG. 126 , these engagement portions T 2122   b  allow engagement therewith the upper rear illumination members T 311  and T 312  of the illumination mechanism T 3 . 
     As shown in  FIG. 124 , the topper rear cover T 212  includes: a support frame portion T 2123  jointed to the lower middle portion of the housing frame member T 2121  and the upper rim portion T 2122 ; and a lower rim portion T 2124  protruding forward from the peripheral edge of the support frame portion T 2123 . On the left surface and the right surface of the lower rim portion T 2124  are formed a plurality of engagement portions T 2124   b . The engagement portions T 2124   b  are notches of a predetermined width on the lower rim portion T 2124 , which extends in the horizontal direction from its front end to the back end. The engagement portions T 2124   b  are formed at equal intervals in the vertical direction. As shown in  FIG. 125  and  FIG. 126 , these engagement portions T 2124   b  allow engagement therewith the lower rear illumination members T 321  and T 322  of the illumination mechanism T 3 . 
     (Topper Front Cover T 214 ) 
     After the upper rear illumination members T 311  and T 312  and the lower rear illumination member T 321  and T 322  are attached to the topper rear cover T 212 , the topper rear cover T 212  is attached to the topper support mechanism T 215  from behind, as shown in  FIG. 127 . After this, the topper front cover T 214  is attached to the topper support mechanism T 215  from the front. 
     As shown in  FIG. 128 , the topper front cover T 214  includes: a window frame portion T 2141  which makes the topper display device T 211  visible from the front; and an upper rim portion T 2142  protruding backward from the peripheral edge of the window frame portion T 2141 . On the left surface and the right surface of the upper rim portion T 2142  are formed a plurality of engagement portions T 2142   a . The engagement portions T 2142   a  are notches of a predetermined width on the upper rim portion T 2142 , which extends in the horizontal direction from its front end to the back end. The engagement portions T 2142   a  are formed at equal intervals in the vertical direction. As shown in  FIG. 129  and  FIG. 130 , these engagement portions T 2142   a  allow engagement therewith the upper front illumination members T 313  and T 314  of the illumination mechanism T 3 . 
     As shown in  FIG. 128 , the topper front cover T 214  includes: a support frame portion T 2143  jointed to the lower middle portion of the window frame portion T 2141  and the upper rim portion T 2142 ; and a lower rim portion T 2144  protruding forward from the peripheral edge of the support frame portion T 2143 . On the left surface and the right surface of the lower rim portion T 2144  are formed a plurality of engagement portions T 2144   a . The engagement portions T 2144   a  are notches of a predetermined width on the lower rim portion T 2144 , which extends in the horizontal direction from its front end to the back end. The engagement portions T 2144   a  are formed at equal intervals in the vertical direction. As shown in  FIG. 129  and  FIG. 130 , these engagement portions T 2144   a  allow engagement therewith the lower front illumination members T 323  and T 324  T 323  and T 324  of the illumination mechanism T 3 . 
     (Frame Member T 218 ) 
     After the upper front illumination members T 313  and T 314  and the lower front illumination members T 323  and T 324  are attached to the topper front cover T 214 , the topper front cover T 214  is attached to the topper support mechanism T 215  from behind, as shown in  FIG. 127 . After this, the frame member T 218  is attached to the topper front cover T 214  from the front. The frame member T 218  is formed so as to surround the peripheral edge of the topper display device T 211 . On the left side and the right side at the upper end portion of the frame member T 218  are provided hook members T 2181  whose leading end portions (rear end portions) extend downward. As shown in  FIG. 131 , the hook members T 2181  are disposed above the topper display device T 211 , and engages with a key hole portion T 41   a  of the first support member T 41  which is screw-fastened to the topper front cover T 214 , thereby enabling easy attachment of the frame member T 218 . 
     (Illumination Mechanism T 3 ) 
     Now, the following will describe an illumination mechanism T 3 . As shown in  FIG. 127 , the illumination mechanism T 3  includes upper rear illumination members T 311  and T 312 , upper front illumination members T 313  and T 314 , lower rear illumination members T 321  and T 322 , and lower front illumination members T 323  and T 324 . The illumination mechanism T 3  further includes upper light source substrates T 34  and lower light source substrates T 35 . 
     (Illumination Mechanism T 3 : Upper Light Source Substrate T 34  and Lower Light Source Substrate T 35 ) 
     The upper light source substrates T 34  are provided on the right side surface of a right upright member T 2155  and the left side surface of a left upright member T 2156 , respectively. The lower light source substrates T 35  are provided on the left side surface and the right side surface of a lower upright member T 2154 , respectively. As shown in  FIG. 116 , each upper light source substrate T 34  includes a flat printed board T 341  and a plurality of light sources T 342  mounted on the outer surface of the printed board T 341 . The light sources T 342  are light emitting members such as mono color or full color LEDs. The light sources T 342  are disposed in such a way that, seven light source groups, each of which includes three light sources T 342  provided at regular intervals between the horizontal end portions, are provided at regular intervals between the vertical end portions. To put it differently, the light sources T 342  are mounted on the printed board T 341  to form a matrix of 7 rows and 3 columns. 
     The lower light source substrates T 35  are constructed to be identical with the upper light source substrates T 34 . In other words, each lower light source substrate T 35  includes a flat printed board T 351  and light sources T 352  which are mounted on the outer surface of the printed board T 351  to form a matrix of 7 rows and 3 columns. 
     (Illumination Mechanism T 3 : Upper Illumination Members T 31  and Lower Illumination Members T 32 ) 
     The upper light source substrates T 34  are covered with the upper rear illumination members T 311  and T 312  and the upper front illumination members T 313  and T 314 . The upper rear illumination members T 311  and T 312  and the upper front illumination members T 313  and T 314  are integrated to form upper illumination members T 31 . In the meanwhile, the lower light source substrates T 35  are covered with the lower rear illumination members T 321  and T 322  and the lower front illumination members T 323  and T 324 . The lower rear illumination members T 321  and T 322  and the lower front illumination members T 323  and T 324  are integrated to form lower illumination members T 32 . 
     Therefore, as shown in  FIG. 114 , the topper device T 2  is arranged such that, while the upper illumination members T 31  protrude from an upper right portion and an upper left portion of the topper device T 2 , the lower illumination members T 32  are provided to protrude from a lower right side portion and a lower left side portion of the topper device T 2 . With this, the topper device T 2  is able to emit illumination light in directions including frontward, sideward, backward, and upward. 
     As shown in  FIG. 132 , the upper illumination members T 31  provided at the upper left portion and the upper right portion and the lower illumination members T 32  provided at the lower left portion and the lower right portion are identical with one another in shape and structure, but the opposing sets of the illumination members are arranged to be horizontally symmetrical with each other. With this, in the topper device T 2 , the upper front illumination member T 313  and the upper rear illumination member T 312  constituting the upper illumination members T 31  on the one side are interchangeable with the lower front illumination member T 323  and the lower rear illumination member T 322  constituting the lower illumination members T 32  on the one side. Furthermore, in the topper device T 2 , the upper front illumination member T 311  and the upper rear illumination member T 312  constituting the upper illumination members T 31  on the other side are interchangeable with the lower front illumination member T 321  and the lower rear illumination member T 324  constituting the lower illumination members T 32  on the other side. 
     (Illumination Mechanism T 3 : Upper Front Illumination Member T 313 ) 
     The upper front illumination member T 313  is made of synthetic resin such as acrylic resin which transmits light, and includes, as shown in  FIG. 133 , a long base body T 3131  which is longitudinally in parallel to the vertical direction and a plurality of light scattering members T 3132  which horizontally protrude from the base body T 3131 . In the upper front illumination member T 313 , as shown in  FIG. 145  and  FIG. 146 , the base body T 3131  contacts with the inner side surface of the topper front cover T 214 , and as the light scattering members T 3132  protrude from engagement portions T 2142   a , the attachment to the topper front cover T 214  and the exposure of the light scattering members T 3132  to the outside are done. 
     The base body T 3131  includes, as shown in  FIG. 134 , a base main body portion T 3131   a  which is a quadrangular prism in shape and a plate member T 3131   b  which protrudes from a front left end portion of the base main body portion T 3131   a . The base main body portion T 3131   a  is open at the left side and the back side, and has claw members T 3131   d  which are provided at the inner sides of the top wall and the bottom wall (i.e., on the upper light source substrate T 34  side in  FIG. 127 ) to be vertically symmetrical with each other. The claw members T 3131   d  partly protrude backward from the back sides of the top wall and the bottom wall. 
     In addition to the above, on the inner side of the right wall of the base main body portion T 3131   a  are provided plural (six) claw members T 3131   c . These claw members T 3131   c  are provided at regular intervals in the vertical direction, and partly protrude backward from the back side of the base main body portion T 3131   a  as shown in  FIG. 135 . Each claw member T 3131   c  is disposed between the light sources T 342  of each column, the light sources T 342  being arranged in a matrix manner on the printed board T 341 . The claw members T 3131   d  on the top wall and the bottom wall and the claw members T 3131   c  on the right wall are used for positioning and provisional tacking, when the upper front illumination member T 313  is joined with the upper rear illumination member T 311 . 
     In addition to the above, the base body T 3131  includes plural (seven) light guiding portions T 3131   e  therein. Each light guiding portion T 3131   e  is provided between neighboring claw members T 3131   c  and is arranged to face the light sources T 342  of each column, the light sources T 342  being arranged on the printed board T 341  in a matrix manner. As shown in  FIG. 138  and  FIG. 139A , each light guiding portion T 3131   e  is shaped as an equilateral triangle in a top view, and is formed in such a way that, when the upper front illumination member T 313  is mounted in the topper device T 2  as the illumination mechanism T 3 , the first side Td including the first apex Ta which is a right angle is in parallel to the surface of the upper light source substrate T 34 . 
     To be more specific, as shown in  FIG. 135  and  FIG. 136 , each light guiding portion T 3131   e  includes a first apex Ta which is a right angle, a first side Td and a second side Tf each of which has the first apex Ta as one end, a second apex Tc which is the other end of the first side Td, a third apex Tb which is the other end of the second side Tf, and an oblique side Tg which opposes the first apex Ta. The first side Td is disposed to be in parallel to the upper light source substrate T 34  shown in  FIG. 127 . The first apex Ta is disposed at a left end portion of the front wall of the base main body portion T 3131   a  (i.e., at a part which is the closest to the upper light source substrate T 34  shown in  FIG. 127 ). The second side Tf having this first apex Ta as one end is joined at the entire front wall in the left/right direction, and the third apex Tb is joined with the front end portion of the inner surface of the right wall of the base main body portion T 3131   a . With this, the light guiding portion T 3131   e  is arranged such that the first side Td is in parallel to the inner surface of the base main body portion T 3131   a  and the oblique side Tg is tilted with respect to the inner surface of the base main body portion T 3131   a.    
     As shown in  FIG. 138  and  FIG. 139A , the seven light guiding portions T 3131   e  are disposed at regular intervals so that each first side Td opposes the light sources T 342  of the three columns on the upper light source substrate T 34 . With this, the illumination light emitted from the light sources T 342  of the upper light source substrate T 34  advances in the direction orthogonal to the first side Td of each light guiding portion T 3131   e , and a part of the light is reflected by the light guiding portion T 3131   e  whereas the most of the light enters the light guiding portion T 3131   e . When, for example, the illumination light having advanced in the light guiding portion T 3131   e  reaches the oblique side Tg, a part of the light is emitted and the remaining part of the light is reflected in accordance with an angle of the illumination light with respect to the oblique side Tg, and the remaining part of the reflected illumination light advances toward the second side Tf and the third apex Tb and enters the base main body portion T 3131   a  which is joined with the second side Tf and the third apex Tb. In this way, all of the illumination light is emitted from the light guiding portion T 3131   e . The specific traveling paths of the illumination light in the light guiding portion T 3131   e  will be detailed later. 
     As such, even if the illumination light with strong directivity is emitted in one direction from the light source T 342 , the illumination light is emitted from the all surfaces of the light guiding portion T 3131   e  in a scattered manner in various directions, with various traveling paths of the illumination light formed by the walls of the light guiding portion T 3131   e , and such scattered light enters the base main body portion T 3131   a.    
     On the outer surface of the base main body portion T 3131   a , light scattering members T 3132  are formed. These light scattering members T 3132  protrude outward from the base main body portion T 3131   a  (i.e., protrude in the direction away from the light guiding portion T 3131   e ). As shown in  FIG. 135 , the light scattering members T 3132  are disposed to correspond to the light guiding portions T 3131   e  each of which is provided between neighboring claw members T 3131   c . With this, the most of the illumination light emitted in different directions on account of the light guiding portion T 3131   e  enters the light scattering member T 3132 . 
     As shown in  FIG. 133 , each light scattering member T 3132  is formed to be a plate protruding outward from the front and right walls of the base main body portion T 3131   a  (i.e., protrudes frontward and rightward). Each light scattering member T 3132  has a plurality of grooves T 3132   a . The grooves T 3132   a  are linearly formed on the top wall to extend outward from the base main body portion T 3131   a  side. The grooves T 3132   a  are formed also at the outer leading end portion. The grooves T 3132   a  may be formed on the under surface of the light scattering member T 3132 . With this, the light scattering member T 3132  outputs the illumination light incident from the entire wall of the base main body portion T 3131   a  while causing the illumination light to be minutely scattered at the grooves T 3132   a.    
     The base main body portion T 3131   a  described above has a flat top surface. In the meanwhile, as shown in  FIG. 137 , the under surface of the base main body portion T 3131   a  is stepped. With this, the vertical direction of the upper front illumination member T 313  can be confirmed by visually checking the difference between the surfaces of the top wall and the bottom wall of the base main body portion T 3131   a.    
     (Illumination Mechanism T 3 : Upper Rear Illumination Member T 311 ) 
     The upper rear illumination member T 311  is made of the same material as the upper front illumination member T 313 , and includes, as shown in  FIG. 140 , a long base body T 3111  which is longitudinally in parallel to the vertical direction and a plurality of light scattering members T 3112  horizontally protruding from the base body T 3111 . The upper rear illumination member T 311  is attached to a topper rear cover T 212  and the light scattering members T 3112  are exposed to the outside in such a way that the base body T 3111  contacts with the inner surface of the topper rear cover T 212  shown in  FIG. 124  and the light scattering members T 3112  protrude from the engagement portions T 2122   b.    
     The base body T 3111  includes a base main body portion T 3111   a  which is a quadrangular prism in shape and a plate member T 3111   b  which protrudes from a front left end portion of the base main body portion T 3111   a . As shown in  FIG. 141 , the base main body portion T 3111   a  is open at the left side and the back side, and has claw insertion portions T 3111   d  at the inner sides of the top wall and the bottom wall (i.e., on the upper light source substrate T 34  side in  FIG. 127 ) to be vertically symmetrical with each other. Into the claw insertion portions T 3111   d , the claw members T 3111   d  and T 3131   d  shown in  FIG. 134  are inserted. 
     In addition to the above, on the inner side of the right wall of the base main body portion T 3111   a  are provided plural (six) claw insertion portions T 3111   c . These claw insertion portions T 3111   c  are provided at regular intervals in the vertical direction, and the claw members T 3131   c  shown in  FIG. 134  are inserted into the claw insertion portions T 3111   c . Each claw insertion portion T 3111   c  is disposed between the light sources T 342  of each column, the light sources T 342  being arranged in a matrix manner on the printed board T 341 . The claw members T 3111   d  at the top wall and the bottom wall and the claw insertion portions T 3111   c  on the right wall are used for positioning and provisional tacking, when the upper front illumination member T 313  is joined with the upper rear illumination member T 311 . 
     In addition to the above, the base body T 3111  includes plural (seven) light guiding portions T 3111   e  therein. The light guiding portions T 3111   e  are each provided between neighboring claw insertion portions T 3111   c , and are arranged to face the light sources T 342  of each column, the light sources T 342  being arranged in a matrix manner on the printed board T 341 . As shown ion  FIG. 142  and  FIG. 143 , each light guiding portion T 3111   e  is shaped as an equilateral triangle in a top view, and is formed in such a way that, when the upper rear illumination member T 311  is mounted in the topper device T 2  as the illumination mechanism T 3 , the first side Td including the first apex Ta which is a right angle is in parallel to the surface of the upper light source substrate T 34 . The details of the light guiding portions T 3111   e  are not given because they are identical with the light guiding portions T 3131   e  of the upper front illumination member T 313 . 
     As shown in  FIG. 138  and  FIG. 139A , the seven light guiding portions T 3111   e  are disposed at regular intervals in such a way that the first side Td opposes the light sources T 342  of the three columns on the upper light source substrate T 34 . With this, the illumination light emitted from the light sources T 342  of the upper light source substrate T 34  advances in the direction orthogonal to the first side Td of the light guiding portion T 3111   e , and a part of the light is reflected by the light guiding portion T 3111   e  whereas the most of the light enters the light guiding portion T 3111   e . When, for example, the illumination light having advanced in the light guiding portion T 3111   e  reaches the oblique side Tg, a part of the light is emitted and the remaining part of the light is reflected in accordance with an angle of the illumination light at the oblique side Tg, and the remaining part of the reflected illumination light advances toward the second side Tf and the third apex Tb and enters the base main body portion T 3111   a  which is joined with the second side Tf and the third apex Tb. In this way, all of the illumination light is emitted from the light guiding portion T 3111   e . The specific traveling paths of the illumination light in the light guiding portion T 3111   e  will be detailed later. 
     As such, even if the illumination light with strong directivity is emitted in one direction from the light source T 342 , the illumination light is emitted from the all surfaces of the light guiding portion T 3111   e  in a scattered manner in various directions, with various traveling paths of the illumination light formed by the walls of the light guiding portion T 3111   e , and such scattered light enters the base main body portion T 3111   a.    
     On the outer surface of the base main body portion T 3111   a , light scattering members T 3112  are provided. This light scattering members T 3112  protrude outward from the base main body portion T 3111   a  (i.e., protrude in the direction away from the light guiding portion T 3111   e ). The light scattering members T 3112  are disposed to correspond to the light guiding portions T 3111   e  each of which is provided between neighboring claw insertion portions T 3111   c  and  3131   c . With this, the most of the illumination light emitted in different directions on account of the light guiding portion T 3111   e  enters the light scattering member T 3112 . 
     As shown in  FIG. 140 , each light scattering member T 3112  is formed to be a plate protruding from the front and right walls of the base main body portion T 3111   a  (i.e., protrudes frontward and rightward). The light scattering member T 3112  has a plurality of grooves T 3112   a . The grooves T 3112   a  are linearly formed on the top surface to extend outward from the base main body portion T 3111   a  side. The grooves T 3112   a  are formed also at the outer leading end portion. The grooves T 3112   a  may be formed on the under surface of the light scattering member T 3112 . With this, the light scattering member T 3112  outputs the illumination light incident from the entire wall of the base main body portion T 3111   a  while causing the illumination light to be minutely scattered at the grooves T 3112   a.    
     The base main body portion T 3111   a  described above has a stepped top surface. In the meanwhile, as shown in  FIG. 144 , the under surface of the base main body portion T 3111   a  is flat. With this, the vertical direction of the upper rear illumination member T 311  can be confirmed by visually checking the difference between the top surface and the under surface of the base main body portion T 3111   a.    
     (Traveling Paths of Illumination Light) 
     Now, with reference to  FIG. 139B , the traveling paths of the illumination light emitted from the light source T 342  of the upper illumination member T 31  provided on the right side will be specifically described. In the figure, the full lines indicate the optical axes of the illumination light emitted from the light source T 342 . 
     As the illumination light is emitted rightward from the light source T 342   a  which is provided on the back side in the horizontal plane, the illumination light enters the first side Td of the light guiding portion T 3111   e  in the direction orthogonal to the first side Td. When the illumination light advances in the light guiding portion T 3111   e  and reaches the oblique side Tg, a part of the illumination light linearly advances rightward whereas the remaining part of the illumination light is reflected in accordance with the incident angle, at the oblique side Tg which is the interface with the air. That is to say, because the light guiding portion T 3111   e  is a rectangular equilateral triangle, the oblique side Tg of the light guiding portion T 3111   e  is the interface which forms an angle of 45 degrees with the illumination light. Therefore, as the illumination light advances in the incident angle of 45 degrees with respect to the oblique side Tg, the illumination light is reflected backward at a reflection angle of 45 degrees. 
     As a result, in the illumination light emitted from the light source T 342   a  on the back side, a part of the light advances rightward by the light guiding portion T 3111   e  and the remaining part advances backward, with the result that the illumination light is emitted from the light scattering member T 3112  in a state of being divided into an optical axis extending backward of the topper device T 2  and an optical axis extending rightward of the topper device T 2 . 
     When the illumination light is emitted rightward from the light source T 342   b  provided in the middle part in the horizontal direction, the illumination light passes through a gap between the light guiding portions T 3111   e  and T 3131   e  and reaches the light scattering members T 3112  and T 3132 . The light is then emitted from the light scattering member T 3112  as illumination light having an optical axis extending rightward of the topper device T 2 . 
     When the illumination light is emitted rightward from the light source T 342   c  which is provided on the front side in the horizontal plane, this illumination light enters the first side Td of the light guiding portion T 3131   e  in the direction orthogonal to the first side Td. When the illumination light advances in the light guiding portion T 3131   e  and reaches the oblique side Tg, a part of the illumination light passes through and advances linearly rightward at the oblique side Tg which is the interface with the air. The remaining part of the illumination light advances in an incident angle of 45 degrees with respect to the oblique side Tg, and is reflected frontward at a reflection angle of 45 degrees. 
     As a result, in the illumination light emitted from the light source T 342   c  on the front side, a part of the light advances rightward by the light guiding portion T 3131   e  whereas the remaining part advances frontward, with the result that the illumination light is emitted from the light scattering member T 3132  in a state of being divided into an optical axis extending frontward of the topper device T 2  and an optical axis extending rightward of the topper device T 2 . 
     As such, the upper rear illumination member T 311  emits illumination light with the optical axes extending frontward, backward, and rightward of the slot machine  1 . As shown in  FIG. 114 , as the upper illumination members T 31  on the left side, which are structurally identical with and are symmetrical with the upper illumination members T 31  on the right side, emit the illumination light with the optical axes extending forward, backward, and leftward from the slot machine  1 , the left and right upper illumination members T 31  emit the illumination light in all four directions including the forward, leftward, rightward, and backward from the topper device T 2 . In a similar manner, with the same mechanism of emission the illumination light, the left and right lower illumination members T 32  emit the illumination light in all four directions including frontward, leftward, rightward, and backward from the topper device T 2 . 
     The other arrangements are identical with those in Embodiment 1 and the explanations thereof are therefore omitted. While in Embodiment 2 the topper device T 2  is fixed to the top device  3 , the topper support mechanism T 215  of the topper device T 2  may be arranged to be identical with the topper support mechanism  215  of Embodiment 1, and the topper device T 2  may be rotatable between the front-facing posture and the tilted posture and the display plate module T 2117  may be replaceable from a side. 
     Embodiment 3 
     It should be noted that the following describes a structure in which a gaming machine of the present invention includes a slot machine  1  of at least one of Embodiment 1 and Embodiment 2. 
     (Outline of Gaming Machine and Definitions of Terms) 
     As shown in  FIG. 147 , a gaming machine  300  is a multi-player gaming machine in which a plurality of slot machines  1  that are gaming terminals are connected to a center controller  200  to be able to perform data communications with one another. The gaming machine  300  is able to run a base game such as a slot game at each slot machine  1  and run a common game at a common display  701  or the like which is a common display device, while synchronizing the slot machines  1 . The slot machines  1  and the center controller  200  are connected wireless, by wires, or by both of them. A unit of bet amount may be a currency of a country or area such as dollar, yen, euro, or the like, or may be a game point used exclusively in a hall having the gaming machine  300  or in the industry. 
     More specifically, the gaming machine  300  includes the slot machines  1  and the center controller  200 . The slot machines  1  each have an input device which accepts an external input, and a terminal controller which runs the base game and which is programmed to execute various steps in order to run a common game executed at more than one of the slot machines  1 . The center controller  200  is connected in communication with the slot machines  1  and is programmed to execute various steps. 
     The terminal controller of the gaming machine  300  is arranged to be able to execute at least a first process in which a base game is run in response to an input of a start operation the input device, a second process in which a common game is run in response to a game start command from the center controller  200 , and a third process in which a game result of the common game is determined based on game result information from the center controller  200 . 
     It is noted that the “common game” is a sub game different from the main game of the gaming machine  300 , and is run along with the basic game or run while the basic game is stopped. Examples of the common game include craps, baseball, and soccer. 
     The center controller  200  of the gaming machine  300  is arranged to be able to execute at least a first process in which a game start command is output at a predetermined timing to a slot machine  1  which satisfies a game running condition, a second process in which the game result of the common game is determined, and a third process in which the game result determined in the second process is output, as game result information, serially to the slot machines  1 . 
     The “game running condition” is a condition for being qualified to participate in the common game. Examples of the game running condition include a cumulative value of a base game bet amount equal to or greater than a minimum bet amount, and the number of base game played being equal to or greater than a minimum number of bets. Note that the game running condition can be satisfied at the will of a player before the common game is begun. For example, when the cumulative value of bet amounts in the base game falls short of the minimum bet amount and the game running condition is not satisfied for this reason, the game running condition can be satisfied by paying a bet amount to compensate the differential between the minimum bet amount and the cumulative value of the bet amounts or making a payment for satisfying a predetermined condition, immediately before the common game is started. Further, in cases where the number of base games falls short, the game running condition can be satisfied by payment corresponding to the shortage, or by making a payment for satisfying a predetermined condition. 
     Further, the “predetermined timing” at which a game start command is outputted is a timing when a common game start condition has been satisfied at any one of the slot machines  1 . Here, examples of the common game start condition include: accumulated bet amount information, and an accumulated base game count. Note that Embodiment 3 is described using the gaming machine  300  having a center controller  200  aside from the slot machines  1 ; however, the present invention is not limited to this. In other words, the gaming machine  300  may be configured in such a manner that at least one slot machine  1  has a function of the center controller  200 , and the slot machines  1  may be connected with each other so as to allow data communications therebetween. 
     The “base game” in the present embodiment is run by the slot machines  1 . The base game is a slot game where a plurality of symbols are rearranged. Note that the base game is not limited to slot game: The base game may be any type as long as it is independently runnable at gaming terminals such as slot machines  1 . 
     The rearrangement of the symbols in the slot game is conducted on the reel device M 1  (symbol display device). The slot game includes processes of: running a normal game on condition that a gaming value is bet, in which normal game the symbols are rearranged on the reel device M 1 , and awarding a normal payout according to the symbols rearranged; and when the symbols are rearranged on a predetermined condition, running a bonus game where the symbols are rearranged under such a condition that a payout rate thereof is greater than that of the normal game, and awarding a bonus payout according to the symbols rearranged. 
     The type and the number of the “symbols” is not limited as long as they are rearranged on the reel device M 1 , The symbols are a superordinate conception of the specific symbols and normal symbols. The specific symbols are added to the normal symbols according to need. For example, the specific symbols include wild symbols and trigger symbols. Each of the wild symbols is a symbol substitutable for any type of symbols. Each of the trigger symbols is a symbol which triggers at least a bonus game. Further, the trigger symbol may trigger increases in the number of specific symbols in the bonus game, that is, the trigger symbol may trigger increases in the number of trigger symbols and/or wild symbols. Furthermore, the trigger symbol may function as a trigger of increase in the number of times to run the bonus game. 
     A coin, a bill, or electrically valuable information corresponding to these is used as a gaming value. Note that the gaming value in the present invention is not particularly limited. Examples of the gaming value include game media such as medals, tokens, cyber money, tickets, and the like. A ticket is not particularly limited, and a later-mentioned barcoded ticket may be adopted for example. 
     The “bonus game” has a same meaning as a “feature game”. In Embodiment 3, the bonus game is a game in which free games are repeated. However, the bonus game is not particularly limited and may be any type of game, provided that the bonus game is more advantageous than the normal game for a player. Another bonus game may be adopted in combination, provided that a player is given more advantageous playing conditions than the normal game. For example, the bonus game may be a game that provides a player with a chance of winning more gaming values than the normal game or a game that provides a player with a higher chance of winning gaming values than the normal game. Alternatively, the bonus game may be a game that consumes fewer amounts of gaming values than the normal game. In the bonus game, these games may be provided alone or in combination. 
     The “free game” is a game runnable with a bet of fewer gaming values than the normal game. Note that “bet of fewer amounts of gaming values” encompasses a bet of zero gaming value. The “free game” therefore may be a game runnable without a bet of a gaming value, which free game awards an amount of gaming values based on symbols rearranged. In other words, the “free game” may be a game which is started without consumption of a gaming value. To the contrary, the “normal game” is a game runnable on condition that a gaming value is bet, which normal game awards an amount of gaming value based on the symbols rearranged. In other words, the “normal game” is a game which starts with consumption of a gaming value. 
     The expression “rearrange” in this specification means dismissing an arrangement of symbols, and arranging symbols once again. Arrangement means a state where the symbols can be visibly confirmed by a player. 
     The phrase “base payout based on the rearranged symbols” means a normal payout corresponding to a rearranged winning combination. The phrase “bonus payout based on the rearranged symbols” means a bonus payout corresponding to a rearranged winning combination. Furthermore, the term “winning combination” indicates that a winning is established. 
     Examples of a “condition in which a payout rate is higher than in the normal game” includes the running of a free game and the running of a game in which the number of wild symbols or trigger symbols is increased or a replaced symbol table is used. In the base game, a rescue process may be executed when a rescue start condition is established. 
     The “rescue process” is a process for rescuing players. Examples of the rescue process include: running a free game, running a game in which the number of wild symbols or trigger symbols is increased or a replaced symbol table is used, and awarding an insurance payout. 
     Examples of the “rescue start condition” include a state in which the normal game is excessively repeated, i.e., the normal game is repeated a predetermined number or more times and a state in which the total amount of the obtained payout is excessively small, i.e., the normal payout and the bonus payout that a single player obtained as a result of playing a game a predetermined number or more times are not higher than a predetermined value. The “rescue process” is a process for rescuing players. Examples of the rescue process include: running a free game, running a game in which the number of wild symbols or trigger symbols is increased or a replaced symbol table is used, and awarding an insurance payout. 
     In addition to the above, the gaming machine  300  includes a common display  701  which is installed to be visible from the operating positions of all slot machines  1 . The center controller  200  may cause the common display  701  to display states until the common game start condition is established. It is noted that the “operating position” is the eye level position of the player at each slot machine  1 . The gaming machine  300  arranged in this way allows each player to estimate the waiting time until the common game starts, by displaying on the common display  701  the states until the common game start condition is established. 
     (Functional Flow of Gaming Machine  300 : Slot Machine) 
     The gaming machine  300  having the above structure has slot machines  1  and an external controller  621  (center controller  200 ) connected to the slot machines  1  so as to allow data communications therebetween. The external controller  621  are connected to the slot machines  1  installed in the hall so that data communications is possible therebetween. 
     The slot machines  1  each include a bet button  601 , a spin button  602 , a display  614 , and a game controller  100  which controls these units. Note that the bet button  601  and the spin button  602  each are a kind of an input device. Further, the slot machine  1  includes a transceiver unit  652  which enables data communications with the external controller  621 . 
     The bet button  601  has a function of accepting a bet amount through a player&#39;s operation. The spin button  602  has a function of accepting a start of a game such as normal game through a player&#39;s operation, that is, a start operation. The display  614  has a function of displaying still-image information and moving-image information. Examples of the still-image information are various types of symbols, numeral values, and signs. Examples of the moving-image information include effect video. The display  614  has a symbol display region  614   a , an image display region  614   b , and a common game display region  614   c.    
     The symbol display region  614   a  includes the reel device M 1  and displays the symbols shown in  FIG. 1 . The image display region  614   b  displays various types of effect image information to be displayed during a game, in the form of a moving image or a still image. The common game display region  614   c  is a region where a common game such as a jackpot game is displayed. 
     The game controller  100  includes: a coin insertion/start-check unit  603 ; a normal game running unit  605 ; a bonus game start determining unit  606 ; a bonus game running unit  607 ; a random number sampling unit  615 ; a symbol determining unit  612 ; an effect-use random number sampling unit  616 ; an effect determining unit  613 ; a speaker unit  617 ; a lamp unit  618 ; a winning determining unit  619 ; and a payout unit  620 . 
     The normal game running unit  605  has a function of running a normal game on condition that the bet button unit  601  has been operated. The bonus game start determining unit  606  determines whether to run a bonus game, based on a combination of rearranged symbols resulted from the normal game. In other words, the bonus game start determining unit  606  has functions of: (i) determining that the player is entitled to a bonus game when one or more trigger symbols rearranged satisfy a predetermined condition; and (b) activating the bonus game running unit  607  so as to run a bonus game from the subsequent unit game. 
     Note that a unit game includes a series of operations executed within a period between a start of receiving a bet and a point where a winning may be resulted. For example, bet reception, rearrangement of symbols having been stopped, and a payout process to award a payout are executed once each within a single unit game of the normal game. Note that a unit game in a normal game is referred to as a unit normal game. 
     The bonus game running unit  607  has a function of running the bonus game which repeats a free game for a plurality of times, merely in response to an operation on the spin button  602 . 
     The symbol determining unit  612  has functions of: determining symbols to be rearranged based on a random number given from the random number sampling unit  615 ; rearranging the determined symbols in the symbol display region  614   a  of the display  614 ; outputting information on rearrangement of the rearranged symbols to the winning determining unit  619 ; and outputting an effect specifying signal to the effect-use random number sampling unit  616 , based on the rearrangement of the symbols. 
     The effect-use random number sampling unit  616  has functions of: when receiving the effect instruction signal from the symbol determining unit  612 , extracting an effect-use random number; and outputting the effect-use random number to the effect determining unit  613 . The effect determining unit  613  has functions of: determining an effect by using the effect-use random number; outputting image information on the determined effect in the image display region  614   b  of the display  614 ; outputting audio and illumination information on the determined effect to the speaker unit  617  and the lamp unit  618 , respectively. 
     The winning determining unit  619  has functions of: determining whether a winning is achieved when information on symbols rearranged and displayed on the display  614  is given; calculating an amount of payout based on a winning combination formed when it is determined that a winning has been achieved; outputting to the payout unit  620  a payout signal which is based on the payout amount. The payout unit  620  has a function of paying out a gaming value to a player in the form of a coin, a medal, a credit, or the like. Further, the payout unit  620  has a function of adding credit data to credit data stored on an IC card  500  inserted into a later-described PTS terminal  700 , the credit data to be added corresponding to the credit to be paid out. 
     In addition to the above, the game controller  100  includes an unillustrated storage unit  661  which stores game-related information such as bet amount data. The storage unit  661  is a storage device which stores data in a rewritable manner, such as a hard disk and a memory. 
     Further, the game controller  100  has a common game running unit  653 . The common game running unit  653  has functions of: outputting bet amount information to the external controller  621  for each unit base game, the bet amount information being based on a bet amount placed as a bet on a normal game; running a common game in response to a game start command from the external controller  621 ; and accepting a bet input through the bet button unit  601  when the bet input corresponds to common game bet amount data indicating a bet amount bettable on the common game. 
     Further, the game controller  100  is connected to the PTS terminal  700 . The PTS terminal  700  is a unit in which an LCD, a microphone, a human body detection camera, etc. are integrated, and has, for example, a function of executing an effect for a game by mutual communications with the game controller  100 . In particular, the PTS terminal  700  has a card slot to which an IC card can be inserted. Thus allows a player to use a credit stored on an IC card at a slot machine  1 , by inserting the IC card into the card slot. Note that a mechanical structure of the PTS terminal  700  is detailed later. 
     Further, when receiving credit data from the PTS terminal  700 , the game controller  100  updates a credit display on the display  614 . Further, when a cash out occurs, the game controller  100  outputs cash-out credit data to the PTS terminal  700 . 
     The PTS terminal  700  of each of the slot machines  1  constituting the gaming machine  300  is connected in communication with a management server  800 , which performs central management of image downloading, IC cards  500 , and credits. 
     (Functional Flow of Gaming Machine  300 : External Controller) 
     The gaming machine  300  arranged as above is connected to an external controller  621 . The external controller  621  has a function of remotely operating and remotely monitoring an operating status of each slot machine  1  and a process such as change in various game setting values. Furthermore, the external controller  621  has a function of determining the common game start condition for each gaming terminal, and running the common game at a plurality of slot machines  1  when a result satisfying the common game start condition is achieved in any one of the gaming terminals. 
     More specifically, as shown in  FIG. 148 , the external controller  621  includes a common game start unit  6213 , a gaming terminal selection unit  6215 , and a transceiver unit  6217 . The common game start unit  6213  has functions of: determining whether the common game start condition is established, based on information of accumulated bet amounts transmitted from each slot machine  1  in each unit base game; outputting a game start command to the slot machines  1 ; and displaying on the common display  701  a screen showing states until the common game start condition is established. 
     Note that the determination of whether the common game start condition is established is made based on the information of accumulated bet amounts, as well as all the accumulated values which increase according to repetition of the unit base games. For example, the determination of whether the common game start condition is established is made based on the information of accumulated bet amounts, as well as all the accumulated values which increase according to repetition of the unit base games. 
     In addition to the above, the common game start unit  6213  has a function of outputting a game start command to a slot machine  1  in which the accumulated value which increases as the base game is repeated satisfies the game running condition. Accordingly, the common game start unit  6213  does not qualify the one or more slot machines  1  whose accumulated value is less than the minimum setting value to participate in the common game. This motivates the player to proactively repeat base games. 
     Further, the common game start unit  6213  has functions of monitoring the no-input period during which no start operation is executed, and outputting a game start command to all the slot machines  1  except one or more slot machines  1  whose no-input period equals or exceeds the time-out period. Thus, the common game start unit  6213  is capable of determining that no player is present at a slot machine  1  where no base game is run for a period of time equal to or longer than the time-out period, thus preventing such a slot machine  1  from running the common game. 
     The gaming terminal selection unit  6215  has a function of selecting a specific slot machine  1  from among the slot machines  1 , and outputting a common game start command signal to the specific slot machine  1 . The transceiver unit  6217  has a function of enabling data communication with the slot machines  1 . 
     (Entire Structure of Game System) 
     The following describes a game system  350  having the gaming machine  300  with the above structure. 
     As shown in  FIG. 149 , the game system  350  includes a plurality of slot machines  1 , and an external controller  621  which is connected to the slot machines  1  through communication lines  301 . 
     The external controller  621  is for controlling the slot machines  1 . In the present embodiment, the external controller  621  is a so-called hall server installed in a game arcade where the plurality of slot machines  1  are provided. Each slot machine  1  is allotted a unique identification number. The external controller  621  distinguishes an origin of data transmitted from each slot machine  1 . Further, the external controller  621  determines transmission destination of data with the identification number when transmitting data to a slot machine  1 . 
     Note that the game system  350  may be installed in one game arcade where various games take place such as a casino, or between a plurality of game arcades. In a case of the game system  350  being installed in one game arcade, gaming systems  350  may be provided for each floor or each section of the game arcade. The communication line  301  may have a wired or wireless structure. A dedicated line or exchange line may be employed as the communication line  301 . 
     As shown in  FIG. 150 , the game system  350  is divided into three major blocks: a management server block, a customer terminal block, and a staff terminal block. The management server block has a casino hall server  850 , a currency exchange server  860 , a casino/hotel staff management server  870 , and a download server  880 . 
     The casino hall server  850  manages an entire casino hall where slot machines  1  are installed. The currency exchange server  860  creates currency exchange rate data, based on currency exchange information and the like. The casino/hotel staff management server  870  manages the casino hall, or staff persons of a hotel associated with the casino hall. The download server  880  downloads the newest information such as information or news related to a game, and informs a player to the newest information through the PTS terminal  700  of each slot machine  1 . 
     Further, the management server block has a member management server  810 , an IC card &amp; money management server  820 , a megabucks server  830 , and an image server  840 . 
     The member management server  810  manages membership information of a player who plays at the slot machine  1 . The IC card &amp; money management server  820  manages an IC card  500  utilized at the slot machine  1 . Specifically, the IC card &amp; money management server  820  stores broken number cash data in association with an identification code, outputs the broken number cash data to the PTS terminal  700 , and the like. Note that the IC card &amp; money management server  820  creates and manages denomination rate data and the like. The megabucks server  830  manages a megabucks which is a game where a total amount of wagers is utilized as a payout, the wagers being placed at slot machines  1  provided at a plurality of casino halls and the like, for example. The image server  840  downloads a newest image such as an image or news related to a game, and informs the player thereof, through the PTS terminal  700  of each slot machine  1 . 
     The customer terminal block includes a slot machine  1 , a PTS terminal  700 , and a settlement machine  750 . The PTS terminal  700  is attachable to a slot machine  1 , and is capable of communicating with the management server  800 . The settlement machine  750  performs settlement by converting cash data into cash, stores coins or bills T as cash data onto the IC card  500 , and the like, the cash data being stored on the IC card  500  carried by the player. 
     The staff terminal block has a staff person management terminal  900  and a member card issuance terminal  950 . The staff person management terminal  900  is provided for a staff person at the casino hall to manage various types of slot machines  1 . Particularly in the present embodiment, the staff person management terminal  900  allows a staff person at the casino hall to check for a possible excess number of IC cards  500  stocked in the PTS terminal  700 , or shortage of IC cards  500  in the PTS terminal  700 . The member card issuance terminal  950  is for a player who plays games at the casino hall to obtain a member card. 
     (PTS Terminal  700 ) 
     The PTS terminal  700  is incorporated in a PTS system, as shown in  FIG. 151 . The PTS terminal  700  attached to the slot machine  1  is arranged to be able to communicate with the game controller  100  of the slot machine  1  and the bill validation controller  890 . 
     Through communication with the game controller  100 , the PTS terminal  700  executes an effect of a game with a sound or an image, updates credit data, and the like. Further, through communication with the bill validation controller  890 , the PTS terminal  700  transmits credit data necessary for settlement. 
     Further, the PTS terminal  700  is connected in communication with the management server  800 . The PTS terminal  700  communicates with the management server  800  through the two lines: a normal communication line and an additional function communication line. 
     Through the normal communication line, the PTS terminal  700  communicates data such as cash data, identification code data, player membership information, and the like. Meanwhile, through the additional function communication line, the PTS terminal  700  executes communication related to an additional function. In the present embodiment, through the additional function communication line, the PTS terminal  700  executes communication related to an exchange function, and IC card function, a biometric identification function, a camera function, a RFID (Radio Frequency Identification) function which is for executing a solid-matter identification function with radio wave. 
     Embodiments of the present invention thus described above solely serve as specific examples of the present invention, and are not to limit the scope of the present invention. The specific structures and the like are suitably modifiable. Further, the effects described in the embodiments of the present invention described in the above embodiment are no more than examples of preferable effects brought about by the present invention, and the effects of the present invention are not limited to those described hereinabove. 
     Further, the detailed description above is mainly focused on characteristics of the present invention to fore the sake of easier understanding. The present invention is not limited to the above embodiments, and is applicable to diversity of other embodiments. Further, the terms and phraseology used in the present specification are adopted solely to provide specific illustration of the present invention, and in no case should the scope of the present invention be limited by such terms and phraseology. Further, it will be obvious for those skilled in the art that the other structures, systems, methods or the like are possible, within the spirit of the present invention described in this specification. The description of claims therefore shall encompass structures equivalent to the present invention, unless otherwise such structures are regarded as to depart from the spirit and scope of the present invention. Further, the abstract is provided to allow, through a simple investigation, quick analysis of the technical features and essences of the present invention by an intellectual property office, a general public institution, or one skilled in the art who is not fully familiarized with patent and legal or professional terminology. It is therefore not an intention of the abstract to limit the scope of the present invention which shall be construed on the basis of the description of the claims. To fully understand the object and effects of the present invention, it is strongly encouraged to sufficiently refer to disclosures of documents already made available. 
     The detailed description of the present invention provided hereinabove includes a process executed on a computer. The above descriptions and expressions are provided to allow the one skilled in the art to most efficiently understand the present invention. A process performed in or by respective steps yielding one result or blocks with a predetermined processing function described in the present specification shall be understood as a process with no self-contradiction. Further, the electrical or magnetic signal is transmitted/received and written in the respective steps or blocks. It should be noted that such a signal is expressed in the form of bit, value, symbol, text, terms, number, or the like solely for the sake of convenience. Although the present specification occasionally personifies the processes carried out in the steps or blocks, these processes are essentially executed by various devices. Further, the other structures necessary for the steps or blocks are obvious from the above descriptions.