Patent Publication Number: US-2009239617-A1

Title: Slot Machine

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority of U.S. Provisional Application No. 61/038.941 filed on Mar. 24, 2008. The contents of this application are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a slot machine. 
     2. Description of the Related Art 
     In a conventional slot machine, when a player inserts a game medium, such as a coin and a bill, in an insertion slot of a slot machine and presses a SPIN button, a display provided on a front face of a cabinet displays a plurality of symbols in a scrolling manner. Then, scrolling of each of the symbols automatically stops. 
     As such a slot machine, for example, as disclosed in U.S. Pat. No. 6,093,102, a slot machine exists which employs a concept of a winning line. In this concept, in a case where a combination of symbols rearranged on a winning line is a predetermined winning combination, a predetermined number of game media are paid out. 
     In addition, as such a slot machine, for example, as disclosed in each of U.S. Pat. No. 6,604,999 and U.S. Patent Publication No. 2002/0065124, a slot machine exists which provides two types of payouts, including a payout determined by a combination of symbols rearranged on a winning line and a payout determined by a number of displayed scatter symbols. 
     With conventional slot machines, however, a player has no option other than starting and stopping the scrolling of symbols in association with a slot game. Owing to repetition of the monotonous game play for a long period of time a player tends to grow tired of the game. Further, with conventional slot machines, a player cannot be involved in the winning or loss of the game, and thus, even if a player had won a game, a player is not able to feel they had won using only their own power, and had little entertainability. 
     The present invention has been made in view of the above-described circumstance which can offer entertainability to players that has not been successfully attained by those of the aforementioned conventional art. 
     SUMMARY OF THE INVENTION 
     A first aspect of the present invention is a slot machine including: a display device having a display region for displaying plural types of symbols with plural types of numbers assigned thereto; an input device for inputting numbers that correspond to the plural types of numbers assigned to the symbols; a memory which stores a combination of the numbers inputted via the input device; a display unit for displaying a combination of the numbers input by the input device; a controller for controlling the display device, the input device, and the display unit. The controller is programmed to: (a) store in the memory a predetermined combination of the numbers inputted via the input device (b) execute a process of displaying the combination of the numbers stored in the memory on the display unit (c) execute a basic game (d) rearrange in the display region the plurality of symbols with plural types of numbers assigned thereto during the basic game (e) pay out a payment in a case where a combination of the rearranged symbols is a predetermined combination (f) pay out a payment, in a case where a combination of numbers assigned to the symbols rearranged on a winning line of the display region coincides with the combination of numbers stored in the memory. 
     According to the first aspect constituted as set forth above, it is possible to predict and input a specific number from a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A second aspect of the present invention is a slot machine of the first aspect, further comprising a BET button, which accepts input of a side BET, wherein the controller executes a process of displaying the numbers input by the input device on the display unit in a state in which the inputted numbers are writable in the memory on condition that the side BET is input from the BET button in the processes (a) and (b). 
     According to the second aspect constituted as set forth above, on condition that a side BET is inputted, it is possible to predict and input specific numbers from a plurality of numbers. A payout is paid not only when symbols rearranged on a winning line forms a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A third aspect of the present invention is the slot machine of the first aspect, wherein the controller judges coincidence of combinations of the numbers in the process (f) while a plurality of preset symbols are rearranged for a plurality of times preset as to input of a side BET of a predetermined credit by the BET button. 
     According to the third aspect constituted as set forth above, on condition that a predetermined credit of a side bet is inputted, a specific number can be predicted and inputted from a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line forms a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A fourth aspect of the invention is the game machine of the first aspect, wherein the controller validates input of the BET button for randomly accepting the side BET during the basic game. 
     According to the fourth aspect constituted as set forth above, the bet button becomes available to be randomly inputted during the basic game, and it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A fifth aspect of the invention is the game machine of the first aspect, wherein the controller is programmed to (g) execute a free game during the basic game and (h) rearrange plural types of symbols to which the plural types of numbers are assigned, in the display region during the free game and wherein the controller executes the process (f) during the basic game. 
     According to the fifth aspect constituted as set forth above, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols during a free game. A payout is paid not only when symbols rearranged on a winning line is a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A sixth aspect of the present invention is a slot machine including: a display device having a display region for displaying plural types of symbols with a plurality of numbers assigned thereto; an input device for inputting numbers that correspond to the plural types of numbers assigned to the symbols; a memory which stores a combination of the numbers inputted via the input device; a bet button which accepts input of a side BET; a display unit for displaying a combination of the numbers input by the input device; a BET button which accepts input of a side BET; a controller for controlling the display device, the input device, the display unit, and the BET button; The controller is programmed to: (a) store a predetermined combination of the numbers inputted via the input device in the memory on condition that the side BET is inputted from the BET button (b) execute a process of displaying the combination of the numbers stored in the memory on the display unit on condition that the side BET is inputted from the BET button (c) execute a basic game (d) rearrange in the display region the plurality of symbols with a plurality of numbers assigned thereto during the basic game (e) pay out a payment in a case where a combination of the rearranged symbols is a predetermined combination (f) pay out a payment, in a case where a combination of numbers assigned to the symbols rearranged on a winning line of the display region coincides with the combination of numbers stored in the memory. 
     According to the sixth aspect constituted as set forth above, on condition that a side BET is inputted, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A seventh aspect of the invention is the game machine of the sixth aspect, wherein the controller judges coincidence of combinations of the numbers in the process (f) while the symbols are rearranged for a plurality of times preset as to input of a side BET of a predetermined credit by the BET button. 
     According to the seventh aspect constituted as set forth above, on condition that predetermined credits of a side bet are inputted, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     An eighth aspect of the invention is the game machine of the sixth aspect, wherein the controller validates input of the BET button for randomly accepting the side BET during the basic game. 
     According to the eighth aspect constituted as set forth above, the bet button is randomly activated and it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A ninth aspect of the invention is the game machine of the sixth aspect, wherein the controller is programmed to (g) execute a free game during the basic game; and (h) rearrange plural types of symbols to which the plural types of numbers are assigned, in the display region during the free game and wherein the controller executes the process (f) during the basic game. 
     According to the ninth aspect constituted as set forth above, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols during a free game. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     A tenth aspect of the present invention is a slot machine including: a display device having a display region for displaying plural types of symbols with a plurality of numbers assigned thereto; an input device for inputting numbers that correspond to the plural types of numbers assigned to the symbols; a memory which stores a combination of the numbers inputted via the input device; a display unit for displaying a combination of the numbers input by the input device;
     a BET button which accepts input of a side BET; a controller for controlling the display device, the input device, the display unit and the BET button. The controller is programmed to: (a) store a predetermined combination of numbers inputted by the input device on condition that the side BET is inputted from the BET button (b) execute a process of displaying the combination of the numbers stored in the memory on the display unit on condition that the side BET is inputted from the BET button (c) execute a basic game (d) rearrange in the display region the plurality of symbols with a plural types of numbers assigned thereto during the basic game (e) pay out a payment in a case where a combination of the rearranged symbols is a predetermined combination and (f) pay out a payment, in a case where a combination of numbers assigned to symbols rearranged on a winning line of the display region coincides with the combination of the numbers stored in the memory while a predetermined number of symbols are rearranged as to input of a side BET of a predetermined credit by the BET button.   

     According to the tenth aspect constituted as set forth above, on condition that predetermined credits of a side BET are inputted, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     An eleventh aspect of the invention is the game machine of the tenth aspect, wherein the controller validates input of the BET button for randomly accepting the side BET during the basic game. 
     According to the eleventh aspect constituted as set forth above, it is possible to predict and input a specific number out of a plurality of numbers assigned to symbols during a basic game. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
     An eleventh aspect of the invention is the game machine of the tenth aspect, wherein the controller is programmed to (g) execute a free game during the basic game and (h) rearrange plural types of symbols to which the plural types of numbers are assigned, in the display region during the free game; and wherein the controller executes the process (f) during the basic game. 
     According to the twelfth aspect constituted as set forth above, it is possible to predict and input a specific number out of plural types of numbers assigned to symbols, during a free game. A payout is paid not only when symbols rearranged on a winning line form a predetermined combination of symbols, but also when a combination of symbols rearranged on a winning line coincides with inputted numbers. Therefore, by predicting symbols, players are able to engage in the payout. Further, a novel slot machine can be provided which allows players to enjoy new entertainability in addition to conventional entertainability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view showing an exemplary symbol matrix during a symbol matrix according to a first embodiment; 
         FIG. 2  is a perspective view schematically showing a slot machine according to the first embodiment; 
         FIG. 3  is a view showing an internal construction of the slot machine shown in  FIG. 2 ; 
         FIG. 4A  is a view showing an exemplary symbol matrix displayed in the slot machine shown in  FIG. 2  during the basic game according to the first embodiment; 
         FIG. 4B  is a view showing an exemplary symbol matrix displayed in the slot machine shown in  FIG. 2  during the basic game according to the first embodiment; 
         FIG. 5A  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the basic game according to the first embodiment; 
         FIG. 5B  is a view showing an exemplary symbol matrix displayed in the slot machine shown in  FIG. 2  during the basic game according to the first embodiment; 
         FIG. 6A  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during a free game according to the first embodiment; 
         FIG. 6B  is a view showing an exemplary symbol matrix displayed in the slot machine shown in  FIG. 2  during the free game according to the first embodiment; 
         FIG. 7A  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during a jackpot bonus game according to the first embodiment; 
         FIG. 7B  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the jackpot bonus game according to the first embodiment; 
         FIG. 8A  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the jackpot bonus game according to the first embodiment; 
         FIG. 8B  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the jackpot bonus game according to the first embodiment; 
         FIG. 9A  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the jackpot bonus game according to the first embodiment; 
         FIG. 9B  is a view showing an exemplary image displayed in the slot machine shown in  FIG. 2  during the jackpot bonus game according to the first embodiment; 
         FIG. 10  is a flowchart showing a subroutine of main process according to the first embodiment; 
         FIG. 11  is a flowchart showing a subroutine of a game execution process according to the first embodiment; 
         FIG. 12  is a flowchart showing a subroutine of a symbol selection program according to the first embodiment; 
         FIG. 13  is a flowchart showing a subroutine of a free game execution process according to the first embodiment; 
         FIG. 14  is a flowchart showing a subroutine of a jackpot bonus game execution process according to the first embodiment; 
         FIG. 15  is a view for schematically showing an appearance of the slot machine according to a second embodiment of the present invention; 
         FIG. 16  is a flowchart showing a subroutine of a game execution process according to a second embodiment; and 
         FIG. 17  is a flowchart showing a subroutine of a symbol selection program according to the second embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First, a slot machine  10  according to a first embodiment will be described in detail with reference to the drawings. The slot machine according to the first embodiment is a so-called video slot machine, which has an image display panel such as a liquid crystal display and executes a game by displaying images of various symbols on the image display panel. 
       FIG. 1  is a view showing an exemplary symbol matrix of a basic game according to a first embodiment. The slot machine  10  according to the present invention executes any one of three types of gaming modes including a basic game, a free game, and a progressive bonus game. The basic game is executed upon consuming a gaming value corresponding to the amount bet by a player. The free game is executed without consuming a gaming value. The progressive bonus game is executed when a jackpot value reaches a predetermined progressive value. While the slot machine  10  is of a stand-alone type, which is not connected to a network, the present invention is also applicable to a networked slot machine. 
     As shown in  FIGS. 1A and 1B , a symbol matrix SM is displayed on a lower image display panel  16  (see  FIG. 2 ) included in a slot machine  10  described later. A total of nine symbols in three rows and three columns are rearranged in the symbol matrix SM. 
     In the first embodiment of the present invention, any of symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, and “villa  128 ”, are rearranged in the symbol matrix SM, and a payout is determined based on the number of respective symbols rearranged in the symbol matrix SM. In the case of a rearranged symbol in symbol matrix SM is a predetermined combination or a combination of numbers on a winning line on a symbol matrix SM coincides with the combination of input numbers a payment is determined. 
     As  FIG. 1  shows, symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” with a plurality of numbers assigned are rearranged in the symbol matrix SM. In the case where rearranged symbols in symbol matrix SM form a predetermined combination or a combination of numbers on a winning line on a symbol matrix SM coincides with the combination of input numbers, a payment is paid out. 
     Furthermore, on input display region  70 , that displays a combination of the input numbers, a selection display image  71  is displayed, and any of the symbols “main character  121 , “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” with the input numbers assigned are rearranged. Here, because a combination of numbers (3), (7), and (2) are input via touch panel  69 , selection display image  71  is displayed to show the word “Selection” was input during an input display region  70  displays “office building  123 ”, “jet  127 ”, “sub character  122 ” with numbers (3),(7), and (2) assigned. In the case of a combination of numbers assigned to a rearranged symbol on symbol matrix SM on a winning line input display region  70  coincides with the combination “office building  123 ”, “jet  127 ”, and “sub character  122 ” displayed on input display region  70  a payment is paid out. 
       FIG. 2  is a view schematically depicting a frame format of an appearance of the slot machine according to the first embodiment. The gaming media used in the slot machine  10  include coins, bills, or electronic value information equivalent thereto. In the present invention, however, medals, tokens, electronic money, or tickets, for example, may be employed as gaming mediums without being limitative thereto in particular. The above tickets are not limitative in particular, and can include barcode-attached tickets or the like, as described later, for example. 
     The slot machine  10  is provided with a cabinet  11 , a top box  12  installed on an upper side of the cabinet  11 , and a main door  13  provided on a front surface of the cabinet  11 . 
     The lower image display panel  16  serving as a display device is provided in front of the main door  13 . The lower image display panel  16  is provided with a liquid crystal panel, which displays the fifteen cells of the symbol matrix SM in three rows and five columns. In each symbol matrix SM, one symbol is arranged. 
     A credit amount display unit  31  of the lower image display panel  16  displays the number of coins credited by way of an image. A payout amount display unit  32  displays by way of an image the number of, for example, coins to be paid if a predetermined number or more symbols of respective types are rearranged in the elements of the symbol matrix SM. 
     Downwardly of the lower image display panel  16 , a control panel  20  consisting of a plurality of buttons  23  to  27  for entering instructions pertinent to the progress of a game by a player; a coin insertion slot  21  for accepting coins in the cabinet  11 ; and a bill validator  22  are provided. 
     On the control panel  20 , a start button  23 , a change button  24 , a cashout button  25 , a 1-BET button  26 , a MAX-BET button  27 , and a side-BET button  85  are provided. The start button  23  is intended for entering a command for starting the game. The change button  24  is intended for use in asking an attendant of the gaming facility for change. The cashout button  25  is intended for entering a command for paying the credited coins to a coin tray  18  through a coin payout exit  19 . The side-BET button  85  is intended for entering a command for betting coins on the game if players desire to place a bet on one more game. 
     The 1-BET button  26  is intended for entering a command for betting one coin among the credited coins on the game. The max-BET button  27  is intended for entering a command for betting the upper number ( 50  in this embodiment) of coins that can be bet per game among the credited coins on the game. 
     The bill validator  22  validates whether or not a bill is legitimate and accepts a legitimate bill into the cabinet  11 . The bill validator  22  may be configured so that a barcode-attached ticket  39  described later is readable thereby. Provided on a lower front surface of the main door  13 , that is, at a lower part of the control panel  20 , is a berry glass  34  on which characters of the slot machine  10  and the like are depicted. 
     On the front face of the top box  12 , an upper image display panel  33  is provided. The upper image display panel  33  has a liquid crystal panel, which displays images for introducing the game contents or explaining game rules, for example. 
     Also, on the top box  12 , a speaker  29  and a lamp  30  are provided. At the lower side of the upper image display panel  33 , a ticket printer  35 , a card reader  36 , a data display  37 , and a keypad  38  are provided. The ticket printer  35  prints, on tickets, bar codes containing coded data such as credit amount, date and time, or ID numbers of the slot machine  10 , and the bar code-attached tickets  39  are output. A player causes another slot machine to read the bar-code-attached tickets  39 , allowing the slot machine to perform games, or alternatively, allowing the exchange of bar-code-attached tickets  39  with bills or the like at a predetermined site of a game facility (for example, at the casher in a casino). 
     The card reader  36  reads data from and write data into a smart card. The smart card is to be owned by the player, which stores data for identifying the player or data regarding the log of games executed by the player, for example. The smart card may store data equivalent to coins, bills, or credits. As an alternative of a smart card, a magnetic stripe card may be employed. The data display  37  is made up of a fluorescent display or the like, and stores data read by the card reader  36  or data input by a player via the keypad  38 , for example. The keypad  38  is intended for entering the instructions or data pertinent to the issuance of tickets. 
       FIG. 3  is a block diagram depicting the internal construction of the slot machine shown in  FIG. 2 . A gaming board  50  includes: a CPU (Central Processing Unit)  51 , a ROM (Read-only Memory)  55  and a boot ROM  52  interconnected by an internal bus; a card slot  53 S corresponding to a memory card  53 ; and an IC socket  54 S corresponding to a GAL (Generic Array Logic)  54 . 
     A memory card  53  is composed of a non-volatile memory, such as CompactFlash (registered trademark), and stores a game program. The game programs include a symbol selection program. The aforementioned symbol selection program is intended for determining the symbols to be rearranged in the elements of the symbol matrix SM. The symbol selection program includes symbol weighing data corresponding to each of a plurality of kinds of payout ratios (for example, 80%, 84%, and 88%). The symbol weighting data is indicative of the correspondence relationship between the respective symbols and one or more random numeric values which come under a predetermined numerical range (0 to 255). The payout ratio is determined according to the payout-ratio setting data output from the GAL  54 . The symbols to be rearranged in the elements of the symbol matrix SM are determined depending upon the symbol weighing data corresponding to the payout ratio. Further, the game programs include table data indicating the correspondence relationship between each of the symbols and a payout. 
     Also, the card slot  53 S is configured to allow the memory card  53  to be inserted thereinto or ejected therefrom, and is connected to a mother board  40  through an IDE pass. Accordingly, the memory card  53  can be ejected from the card slot  53 S, other game programs and other game system programs can then be written into the memory card  53 , and further, the memory card  53  can be inserted into the card slot  53 S, thereby allowing the player to change the types and contents of games executed in the slot machine  10 . The game program includes programs concerning a game progress. The game programs include those which are relevant to the operating procedures for performing games. Furthermore, the game program includes image data or sound data to be output during the game. The image data include, for example, image data indicative of the symbol matrix. 
     The GAL  54  is a kind of PLD having an OR-fixed arrayed structure. The GAL  54  is provided with pluralities of IN ports and OUT ports. If predetermined items of data are input to the IN port, the corresponding data is output from the OUT port. The data output from the OUT port is equivalent to the above-described payout rate setting data. In addition, an IC socket  54 S is constituted to enable removable insertion of GAL  54 , and the card slot is connected to a motherboard  40  by means of a PCI bus. Therefore, GAL is replaced with the replacement GAL  54 , thereby making it possible to vary the payout rate setting data. 
     The CPU  51 , the ROM  55 , and the boot ROM  52  interconnected by the internal bus are connected to the motherboard  40  by the PCI bus. The PCI bus serves to transmit signals between the mother board  40  and the gaming board  50  and supply power from the mother board  40  to the gaming board  50 . 
     The motherboard  40  is constructed using a general-purpose motherboard commercially available (a printed circuit board on which essential parts of a personal computer are mounted) and includes: a main CPU  41 , a ROM (Read Only Memory)  42 ; a RAM (Random Access Memory)  43 ; and a communication interface  44 . The main CPU  41  functions as a processor for controlling a display device and memory according to the embodiment of the present invention. 
     The ROM  42  stores the programs and permanent data of a BIOS (Basic Input/Output System) or the like, which is made up of memory devices such as a flash memory and executed by the main CPU  41 . When the BIOS is executed by the main CPU  41 , processing of initializing predetermined peripheral devices is carried out and processing of capturing game programs and game system programs stored in the memory card  53  through the gaming board  50  is started. In the present invention, the contents of the ROM  42  may be rewritable or not. 
     The RAM  43  stores data and programs used when the main CPU  41  is activated. The RAM  43  can also store game programs. Further, the RAM  43  stores the data of credit amounts and coin insertion numbers or payout numbers in one game. 
     To the motherboard  40 , a main body PCB (Printed Circuit Board)  60  and a door PCB  80 , described later, is interconnected by means of a USB. A power supply unit  45  is also connected to the motherboard  40 . 
     To the main body  60  and the door PCB  80 , equipment or devices, for generating an input signal input to the main CPU  41 , and those of which operation is controlled by means of a control signal output from the main CPU  41 , are connected. The main CPU  41  executes the game programs stored in RAM  43 , based upon an input signal that was input to the main CPU  41 , thereby performing predetermined computational processing. Then, this CPU  41  stores results thereof into RAM  43 ; and transmits control signals to equipment and devices as control processing relative to the equipment and devices. 
     Connected to the main body PCB  60  are a lamp  30 , a hopper  66 , a coin detecting section  67 , a graphic board  68 , a speaker  29 , a touch panel  69 , a bill validator  22 , a ticket printer  35 , a card reader  36 , a key switch  38 S, and a data display  37 . The lamp  30  illuminates in a predetermined pattern, based on a control signal output from a main CPU  41 . The lamp  30  lights in a predetermined pattern, based upon a control signal output from the main CPU  41 . 
     The hopper  66  is installed in a cabinet  11 , and a predetermined number of coins are paid out from the coin payout opening  19  to the coin tray  18 , based upon the control signal output from the main CPU  41 . A coin detecting section  67  is provided inside of the coin payout opening  19 , and outputs an input signal to the main CPU  41 , if it is detected that a predetermined number of coins have been paid out from the coin payout opening  19 . 
     A graphic board  68  controls the images to be displayed on the upper and lower image display panels  33  and  16 , based upon the control signal output from the main CPU  41 . The credit amount display region  31  (see  FIG. 2 ) on the lower image display panel  16  displays the number of credits stored in the RAM  43 . Further, the payout amount display region  31  (see  FIG. 2 ) on the lower image display panel  16  displays the number of coins to be paid out. The graphic board  68  is provided with: a VDP (Video Display Processor), which generates image data, based upon the control signal output from the main CPU  41 ; and a video RAM, etc., which temporarily stores image data generated by the VDP. The image data used when the image data is generated by the VDP is read from the memory card  53 , and thereafter, is included in the game programs stored in the RAM  43 . 
     The bill validator  22  validates whether or not a bill is legitimate and accepts a legitimate bill into the cabinet  11 . The bill validator  22 , upon accepting a legitimate bill, outputs an input signal to the main CPU  41  based on the bill amount. The main CPU  41  stores in the RAM  43  the amount of credits responsive to the amount of bills transmitted by the input signal. 
     Based on a control signal output from the main CPU  41 , the ticket printer  35  prints on a ticket a barcode having encoded thereon data such as the credit amount, data and time, and the identification number of the slot machine  10  stored in the RAM  43 . Further, this printer outputs the printed ticket as a barcode-attached ticket  39 . The card reader  36  reads data from a smart card, thereby transmitting the read data to the main CPU  41  or writing data into the smart card, based upon the control signal from the main CPU  41 . The key switch  38 S is provided on the key pad  38 , and outputs a predetermined input signal to the main CPU  41  when a player operates the key pad  38 . The data display  37  displays, based upon a control signal output from the main CPU  41 , the data read by the card reader  36  and the data input by a player through the key pad  38 . 
     To the door PCB  80 , a control panel  20 , a reverter  21 S, a coin counter  21 C, and a cold cathode-ray tube  81  are connected. The control panel  20  is provided with: a start switch  23 S corresponding to the start button  23 ; a change switch  24 S corresponding to the change button  24 ; a cashout switch  25 S corresponding to a cashout button  25 ; a 1-BET switch  26 S corresponding to a 1-BET button  26 ; a MAX-BET switch  27 S corresponding to the MAX-BET button  27 ; and a side-BET switch  85 S corresponding to the side-BET switch  85 . When the player operates the buttons  23  to  27 , and  85  the corresponding switches  23 S to  27 S and  85 S output input signals to the main CPU  41 , respectively. 
     The coin counter  21 C is provided inside the coin receiving slot  21 , and validates whether or not a legitimate coin is inserted into the coin receiving slot  21 . Those other than the legitimate coins are discharged from the coin payout exit  19 . The coin counter  21 C outputs an input signal to the main CPU  41  when a legitimate coin is detected. This coin counter discriminates whether a coin inserted by a player into the coin receiving slot  19  is valid or invalid. Those other than the valid coins are discharged from the coin payout exit  19 . The coin counter  21 C also outputs an input signal to the main CPU  41  if a valid coin is detected. 
     The reverter  21 S is operable based upon the control signal output from the main CPU  41 . This reverter distributes, the coins recognized to be legitimate by the coin counter  21 C, into a cashbox (not shown) or a hopper  66  which was installed in the slot machine  10 . In other words, if the hopper  66  is filled with coins, the legitimate coins are distributed to the cashbox by means of the reverter  21 S. Otherwise, the legitimate coins are distributed to the hopper  66 . The cold cathode-ray tube  81  functions as a backlight installed at the rear side of the lower and upper image display panels  16  and  33 , and lights based upon the control signal that was output from the main CPU  41 . 
       FIG. 4  to  FIG. 9 . are views showing one example of an image displayed in the slot machine shown in  FIG. 2  according to the first embodiment.  FIGS. 4A and 4B  are views each showing an exemplary symbol matrix displayed during the basic game in the slot machine shown in  FIG. 2 . 
     As shown in  FIG. 4A , the lower image display panel  16  is made up of a display region  92 , an information display region  93 , an effect image display region  94 , and the like. The display area section  92  is for displaying a symbol matrix SM. In addition, the information display region  93  is arranged above the display area section  92 . This display region is made up of a credit amount display region  93   a,  a BET amount display region  93   b,  a character information display portion  93   c,  a PAID amount display region  93   d,  and a charge display region  93   e.    
     The number of coins presently credited is displayed at the credit amount display region  93   a  while the number of coins bet in one game is displayed at the BET amount display region  93   b.  The character information indicative of a current status of the game is displayed at the character information display region  93   c.  The characters of “PLAYNOW” are displayed during the play of the game, whereas the characters of “GAMEOVER” are displayed during the intervals between the plays of the game. The number of coins that has been successfully obtained in one game is displayed at the PAID amount display region  93   d,  whereas a conversion value of the credit amount based on a predetermined charge is displayed at the charge display region. 
     At the effect image display region  94 , effect images in accordance with a type of the present slot game are displayed. In other words, the effect image display region  94  displays different effect images between the basic and free games. 
     From among the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, and “villa  128 ”, and “stack of bills  129 ” are rearranged in the symbol matrix SM displayed on the lower image display panel  16 . In the case of a rearranged symbol in symbol matrix SM is a predetermined combination or a combination of numbers on a winning line on a symbol matrix SM coincides with the combination of input numbers a payment is paid out. 
     Here, symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” with corresponding plurality of numbers are rearranged. Furthermore, on any of rearranged symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” will be rearranged on input display region  70  displaying combinations of input numbers. Here, number (1) is input via a touch panel  69 , therefore an image  71  that reads “select time” is displayed and on a display region  70  a symbol “main character  121 ” with number (1) assigned is displayed. 
     As  FIG. 4B  shows, when the start button is manipulated, symbols are displayed in a scrolling manner on each symbol matrix SM. Further, any of symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” on an input display device  70  assigned with input numbers are rearranged. Here, because a combination of numbers (1)(1)(1) was input via a touch panel  69 , selection display image  71  is displayed to indicate that the word “Selection” was input. 
       FIG. 5A  is a diagram illustrating an exemplary image displayed in the slot machine  10  shown in  FIG. 2 .  FIG. 5B  is a diagram illustrating an exemplary symbol matrix, according to the first embodiment. Symbols from among the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged in the symbol matrix SM as shown on  FIG. 5 . On a center line of a symbol matrix SM, one basic line BL is set. In the embodiments of the present invention, the basic line shall mean a winning line. 
     Furthermore, symbols from among the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” with input numbers assigned are rearranged on a combination of input numbers displayed on a input display region  70 . Here, because (1)(1)(1) was input via a touch panel  69 , a combination of  3  symbols “main character  121 ” is displayed. 
     Here, because a combination of symbols “sub character  122 ”, “car  125 ”, “stock certificate  126 ” was rearranged, a predetermined combination information display  76   a  called “out” is displayed, then a rearranged symbol on a winning line on a symbol matrix SM rearranged symbol is input via a touch panel  69  a displayed “main character  121 ” does not match the three combination thus a payout is not given. 
     From among the symbols with plural numbers assigned, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged in the symbol matrix SM displayed as shown on  FIG. 5B . On a center line of a symbol matrix SM, one basic line BL is set. 
     Furthermore, a input display region  70  which displays a combination of input numbers, symbols from among symbols with assigned numbers “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged. Here, because a combination of numbers (1)(1)(1) was input via a touch panel  69 , a combination of three symbols “main character  121 ” is displayed. 
     Here, because a combination of 3 symbols “main character  121 ” were rearranged on the winning line a combination information display  76   b  displays the word “Great”. Then a combination of numbers assigned to a symbol on a winning line of a symbol matrix SM is input via a touch panel  69 . Then a combination of three “main character  121 ” displayed on an input display region  70  is a combination which triggers a free game thus a free game is initiated. 
       FIG. 6A  is a diagram illustrating an exemplary image displayed in the slot machine  10  shown in  FIG. 2 .  FIG. 6B  is a diagram illustrating an exemplary symbol matrix, during the free game according to the first embodiment. As shown in  FIG. 6A , when the symbols rearranged in the elements of the symbol matrix SM in  FIG. 5A  are rearranged to form a combination for executing the free game, i.e., the combination of the three symbols “main character  121 ”, the free game is started. Upon starting the free game, the upper image display panel  33  displays a free-game-number display image  90   a  indicative of the number of times in executing the free game. In this case, the free-game-number display image  90   a  of “10 FREE GAME” is displayed indicating that the number of times in executing the free game has been set to ten. 
     As shown in  FIG. 6B , in the symbol matrix SM, the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged in any of the elements of the symbol matrix SM. 
     Further, from among the symbols with input numbers assigned, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” is rearranged on the input display region  70  which displays the input combination. Here, because a combination of numbers (2)(2)(2) was input via a touch panel  69 , a combination of 3 identical symbols “sub character  122 ” is displayed. 
     Here, a combination of three identical symbols “main character  121 ” has been rearranged, and thus, a combination information display  76   b  that reads “Great” is displayed. Then a combination of numbers assigned to a symbol on a winning line of a symbol matrix SM was input via a touch panel  69 . Moreover, a “sub character  122 ” displayed on input display region  70  corresponds to the three combination a payout is paid and because “sub character  122 ” and the 3 combinations triggers a jackpot bonus game a jackpot bonus game is initiated. 
       FIGS. 7A and 7B  are diagrams each illustrating an exemplary image displayed in the slot machine  10  according to the first embodiment, shown in  FIG. 2 , during the jackpot bonus game. As shown in  FIG. 7A , when the symbols rearranged in the elements of the symbol matrix SM in  FIG. 6B  are rearranged to match a combination for executing the jackpot bonus game, i.e., the combination of the three “sub character  122 ”, the jackpot bonus game is started. When start of the jackpot bonus game is determined, the upper image display panel  33  displays a jackpot-bonus-game display image  90   b  indicative of start of the jackpot bonus game. In this case, the jackpot-bonus-game display image  90   b  of “BONUS GAME” is displayed indicating that the jackpot bonus game is to be started. 
     As shown in  FIG. 7B , upon starting the jackpot bonus game, the display region  92  displays a selection screen for determining types of jackpot bonus games. In this case, the symbols ( 1 ) to ( 5 ) including “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, and “villa  128 ” are displayed so that a type of the jackpot bonus game can be selected by selecting one from among these symbols though a touch panel  69 . 
       FIGS. 8A and 8B  are diagrams each illustrating an exemplary image displayed in the slot machine  10  according to the first embodiment shown in  FIG. 2 , during the jackpot bonus game. As shown in  FIG. 7A , the jackpot bonus game is displayed which corresponds to the symbol selected in  FIG. 6B . When the symbol ( 2 ) is selected in  FIG. 6B , the jackpot bonus game of a car race is started. After that, a car-race start screen is displayed which constitutes the main character effect image  72  and the sub character effect image  73 . 
     As shown in  FIG. 8B , displayed next is a win-or-lose screen of the jackpot bonus game that corresponds to the symbol selected in  FIG. 7B . In this case, when the symbol ( 2 ) is selected in  FIG. 7B  and the main character effect image  72  wins in the jackpot bonus game of the car race, a win-or-lose information display  75   a  of “You Win” is displayed. 
       FIGS. 9A and 9B  are diagrams each illustrating an exemplary image displayed in the slot machine  10  according to the first embodiment shown in  FIG. 2 , during the jackpot bonus game. As shown in  FIG. 9A , a win-or-lose screen of the jackpot bonus game is displayed which corresponds to the symbol selected in  FIG. 7B . When the symbol ( 2 ) is selected in  FIG. 7B  and the sub character effect image  73  wins in the jackpot bonus game of a car race, a win-or-lose information display  78   b  of “You Lose” is displayed. A payout display image  74  of “Mini” is displayed which is indicative of types of payouts of the jackpot, and then, the payout corresponding to “Mini” is awarded. 
     As shown in  FIG. 9B , the display region  92  displays a selection screen of the jackpot bonus game corresponding to the symbol selected in  FIG. 7B . When the symbol ( 2 ) is selected in  FIG. 7B  and the “main character  121 ” wins in the jackpot bonus game of a car race (see  FIG. 8B ), the display region  92  displays a selection screen for determining the types of a subsequent jackpot bonus game and identifiably displays the fact that the symbol ( 2 ) is selected last time in  FIG. 7B . Selecting any symbol other than (2) from a touch panel  69  executes a subsequent jackpot bonus game. 
     Next, a process executed in the slot machine  10  according to the first embodiment will be described in detail with reference to the accompanying drawings. The main CPU  41  reads out and executes a game program, thereby conducting the game. 
       FIG. 10  is a flowchart showing a subroutine of main process according to the first embodiment. In the main process, first, when a power switch is turned on (that is, when power is supplied), a motherboard  40  and a gaming board  50  are activated respectively, so that the CPU  51  executes an initial setting process (step S 101 ). In this initial setting process, the main CPU  41  executes the BIOS stored in the ROM  42 , decompresses, in the RAM  43 , compressed data included in the BIOS, executes the BIOS decompressed in the RAM  43 , and performs diagnosis and initialization of each of the peripheral devices. Further, the main CPU  41  writes game programs or the like from the ROM  42  into the RAM  43 , and acquires payout-ratio setting data and country-identification information. The main CPU  41  also performs an authentication process for each program during execution of the initial setting process. 
     Next, the main CPU  41  performs a game execution process described later with reference to  FIG. 10  (step S 102 ). In this game execution process, the main CPU  41  sequentially reads and executes the game programs or the like from the ROM  42 . By performing this game execution process, the slot machine  10  executes the game according to the first embodiment. The game execution process is repeatedly performed while power is supplied to the slot machine  10 . 
       FIG. 11  is a flowchart showing a subroutine of the game execution process invoked and performed at step S 102  of the subroutine shown in  FIG. 10  according to the first embodiment. First, the main CPU  41  performs a symbol selection program described later with reference to  FIG. 12  (step S 201 ). Specifically, in order for the main CPU  41  to display symbols, with plural types of numbers assigned, for entering a combination of numbers, a combination of numbers from among the displayed symbols must be displayed. 
     Next, the main CPU  41  judges whether a coin has been bet or not (step S 202 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the 1-BET switch  26 S when the 1-BET button  26  is pressed, or alternatively, being output from the MAX-BET switch  27 S when the MAX-BET button  27  is pressed. The main CPU  41  controls the current step to return to the process at the step S 202  upon judging that no coin has been bet (step S 202 : NO). 
     On the other hand, the main CPU  41  subtracts the number of bet coins from the credit amount stored in the RAM  43  (step S 203 ) upon judging that a coin has been bet (step S 202 : YES). In the case where the number of bet coins is greater than the credit amount stored in the RAM  43 , the main CPU  41  controls the current step to return to step S 101  without performing the process for subtracting the number of bet coins from the credit amount stored in the RAM  43 . In the case where the number of bet coins exceeds the upper limit (fifty coins in this embodiment) of coins that can be bet in one game, the main CPU  41  controls the process to shift to step S 204  without performing the process for subtracting the number of bet coins from the credit amount stored in the RAM  43 . 
     The main CPU  41  then judges whether or not the start button  23  has been set to ON (step S 204 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the start switch  23 S when the start button  23  is pushed. The main CPU  41  controls the step to return to step  202  upon judging that the start button  23  has not been set to ON (step S 204 : NO). Where the start button  23  has not been set to ON (for example, where an instruction has been input to terminate the game without setting the start button  23  to ON), the main CPU  41  cancels acceptance of a subtraction result at step S 202 . 
     On the other hand, upon judging that the start button  23  has been set to ON (step S 204 : YES), the main CPU  41  performs the symbol rearrangement process (step S 205 ). Specifically, the CPU  41  executes the program stored in the RAM  43  and determines the symbols to be rearranged in the symbol matrix SM displayed on the lower image display panel  16 . The symbols are determined from among the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ”. This determination is based on the symbol weighting data and random numeric values sampled by sampling the random numeric values in a numerical range which comes under a predetermined range of random numeric values. The CPU  41  then rearranges the symbols in the symbol matrix SM. 
     Next, the main CPU  41  judges whether or not a prize has been established (step S 206 ). Specifically, the main CPU  41  judges whether or not a predetermined combination of symbols having been rearranged in the symbol matrix SM or numbers assigned to a rearranged symbol on a winning line corresponds to the input numbers. Here, the prize is established on condition that a predetermined number of symbols of the same type are rearranged in the symbol matrix SM and also on condition a combination of numbers assigned to symbols corresponds to a combination stored in RAM  42 . 
     Upon judging that the prize is established (step S 206 : YES), the main CPU  41  then executes a coin-payout process in accordance with the amount of bet and the number of coins set for the winning number (step S 207 ). Where the coins are deposited, main CPU  41  performs a process of adding the number of credits stored in RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. 
     On the other hand, when judging that the prize is not established (step S 206 : NO) or executing the process at step S 207 , the main CPU  41  judges whether or not a free game trigger has been established (step S 208 ). Specifically, the main CPU  41  executes the program stored in the RAM  43  to sample the random numeric values in a numerical range which comes under a predetermined range of random numeric values, thereby judging whether or not the free game trigger condition has been satisfied based on the sampled random numeric values. Upon judging that the free game trigger is established (step S 208 : YES), the main CPU  41  performs a free-game execution process described later with reference to  FIG. 13  (step S 209 ). In this free-game execution process, the main CPU  41  sequentially reads and executes the game programs or the like from the ROM  42  and performs the free-game execution process. Upon terminating this process, the main CPU  41  controls the step to move to step S 212 . 
     On the other hand, upon judging that the free game trigger has not been established (step S 208 : NO), the main CPU  41  judges whether or not a jackpot bonus game trigger has been established (step S 210 ). Specifically, the main CPU  41  executes the program stored in the RAM  43  to sample the random numeric values in a numerical range which comes under a predetermined range of random numeric values, thereby judging whether or not the jackpot bonus game trigger has been established based on the sampled random numeric values. Upon judging that the jackpot bonus game trigger is established (step S 210 : YES), the main CPU  41  executes a jackpot bonus game execution process described later with reference to  FIG. 13  (step S 211 ). In this jackpot bonus game, the main CPU  41  sequentially reads and executes the game programs or the like from the ROM  42  to execute the jackpot bonus game execution process. 
     The CPU  41  performs a symbol selection process (step S 212 ) upon judging that the jackpot bonus game trigger has not been established (step S 210 : NO) or when the process of step  209  terminates. In this symbol selection termination process, the main CPU  41  terminates the display of a combination of input numbers displayed on input display region  70 , thus clearing the numbers assigned to symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” stored in RAM  43 . 
       FIG. 12  is a flowchart showing a subroutine of the symbol selection process invoked and performed at step S 201  of the subroutine shown in  FIG. 12  according to the first embodiment. First, the main CPU  41  displays a symbol selection image (step S 301 ). Specifically, the main CPU  41  rearranges “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ”, for inputting numbers corresponding to the plural types of numbers assigned to symbols from the touch panel  69  in each of symbol matrixes SM (see  FIG. 4A ). 
     Next, the main CPU  41  judges whether or not the predetermined process has been detected (step S 302 ). Specifically, the main CPU  41  via a touch panel  69  judges whether or not numbers assigned to symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” were input or not. Upon judging that a predetermined process was not detected (step S 302 : NO), the main CPU  41  controls the step to return to step S 302 . 
     On the other hand, upon judging that a predetermined process has been detected (step S 302 : YES), a combination of numbers are stored in the memory (S 303 ). Specifically, the main CPU  41  stores numbers assigned to symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills” in RAM  43 . 
     Next, the main CPU  41  displays the combination (step S 304 ). Specifically, the main CPU  41  combines memory stored during step S 303  and displays them in input display region  70  (see  FIG. 4B ). The main CPU  41  terminates the symbol selection process when executing this process. 
       FIG. 13  is a flowchart showing a subroutine of the free game execution process invoked and executed at step S 209  of the subroutine shown in  FIG. 11  according to the first embodiment. First, the main CPU  41  determines a free-game number T as a number of times in executing the free game (step S 401 ). Specifically, the main CPU  41  determines the free-game number T in accordance with a program stored in the RAM  43 . 
     Next, the main CPU  41  performs a process for setting the free-game number B=K (step S 402 ). Specifically, the main CPU  41  sets a remaining free-game number B=T in the storage area provided in the RAM  43 , the area for storing the data indicative of the remaining free-game number B as the remaining number of times in executing the free game. A value of T is equal to the free-game number T determined at step S 401 . 
     Next, the main CPU  41  performs a free game symbol selection process for the free game (step S 403 ). Specifically, the main CPU displays symbols with plural types of numbers assigned, for entering a combination of numbers, and then, displays a combination of numbers from the displayed symbols. 
     The main CPU  41  then judges whether or not the start button  23  has been set to ON (step S 404 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the start switch  23 S when the start button  23  is pushed. The main CPU  41  controls the step to return to step S 404  upon judging that the start button  23  has not been set to ON (step S 404 : NO). 
     On the other hand, upon judging that the start button  23  has been set to ON (step S 404 : YES), on the other hand, the main CPU  41  performs a process for displaying an effect image (step S 405 ). Specifically, the main CPU  41  displays a free-game-number display images  90   a  (see  FIG. 6 ) corresponding to the free-game number on the upper image display panel  33 . 
     Next, the main CPU  41  performs a symbol rearrangement process for the free game (step S 406 ). Specifically, the main CPU  41  executes the program stored in the RAM  43  and determines the symbols to be rearranged in the symbol matrix SM displayed on the lower image display panel. These symbols are selected from among the symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ”. This determination is based on the symbol weighing data and random numeric values sampled by sampling the random numeric values in a numeric-value range which comes under a predetermined range of random numeric values. The main CPU  41  then rearranges the symbols to be rearranged in the symbol matrix SM. 
     Next, the main CPU  41  judges whether or not a jackpot bonus trigger has been established (step S 407 ). Specifically, the main CPU  41  executes the program stored in the RAM  43  to sample the random numeric values in a numerical range which comes under a predetermined range of random numeric values, thereby judging whether or not the jackpot bonus game trigger has been established based on the sampled random numeric values. Upon judging that the jackpot bonus game trigger has been established (step S 407 : NO), the main CPU  41  controls the process to shift to step S 409 . 
     On the other hand, upon judging that the jackpot bonus trigger has been established (step S 407 : YES), the main CPU  41  executes a jackpot bonus game execution process described later with reference to  FIG. 14  (step S 408 ). In this jackpot bonus game, the main CPU  41  sequentially reads and executes the game programs or the like from the ROM  42  to execute the jackpot bonus game execution process. The main CPU  41  controls the process to shift to step S 410  when terminating this process. 
     Next, the main CPU  41  judges whether or not a prize has been established (step S 409 ). Specifically, the main CPU  41  judges whether or not a predetermined combination of symbols having been rearranged in the symbol matrix SM or numbers assigned to a rearranged symbol on a winning line corresponds to the input numbers. Here, the establishment of a prize means a fixed amount of the same symbol is rearranged, and also when a combination of numbers assigned to a rearranged symbol on a winning line corresponds to the combination of numbers stored in RAM  42 . 
     Thereafter, upon judging that the prize has been established (step S 409 : YES), the main CPU  41  performs a coin-payout process in accordance with the number of coins set for the winning number (step S 410 : YES). Where the coins are deposited, the main CPU  41  executes a process for adding the number of paid-out coins to the credit amount stored in the RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. 
     On the other hand, upon judging that the prize has not been established (step S 409 : NO) or upon executing the processes at step S 408  and step S 410 , the main CPU  41  sets the remaining free-game number B=B−1 (step S 411 ). Specifically, the main CPU  41  sets B=B−1 at a value of the free-game number B stored in the RAM  43 . 
     The main CPU  41  then judges whether or not a value of the remaining free-game number B is equal to zero (step S 412 ). Specifically, the main CPU  41  judges whether or not a value of the remaining game number stored in the RAM  43  is equal to zero. Upon judging that the value of the remaining free-game number B is not zero (step S 412 : NO), the main CPU  41  controls the step to return to step S 404 . 
     On the other hand, upon judging that the value of B is equal to zero (step  412 : YES), the main CPU  41  terminates the free-game execution process. 
       FIG. 14  is a flowchart showing a subroutine of the jackpot bonus game execution process invoked and performed at step S 211  of the subroutine shown in  FIG. 11  and at step S 408  of the subroutine shown in  FIG. 13 , according to the first embodiment. At first, the main CPU  41  displays a first effect selection image (step S 501 ). Specifically, the main CPU  41  displays the jackpot bonus game display image  90   b  displaying the start of the jackpot bonus game on the upper image display panel  33 , and a selection screen for determining the types of jackpot bonus games in the display region  92  (see  FIG. 7B ). 
     Next, the main CPU  41  judges whether or not the symbol is selected (step S 502 ). Specifically, the main CPU  41  judges whether or not the symbol displayed on the selection screen for determining the types of jackpot bonus games selected via the touch panel  69  (see  FIG. 7B ). Upon judging that a symbol has not been selected (step S 603 : NO), the main CPU  41  controls the current step to move to the process at step S 607 . 
     On the other hand, upon judging that the symbol is selected (step S 502 : YES), the main CPU  41  displays the selected effect image (step S 503 ). Specifically, the main CPU  41  sequentially reads the effect image corresponding to the symbol selected at step S 502  from the ROM  42  and displays the effect image in the display region  92  (see  FIG. 8A ). 
     Next, the main CPU  41  judges whether or not a “Win” effect is read (step S 504 ). Specifically, the main CPU  41  judges whether or not the effect image read at step S 503  corresponds to the “Win” effect. Upon judging that the read-out image does not correspond to the “Win” effect (step S 504 : NO), the main CPU  41  displays the effect image of “Lose” (step S 505 ). Specifically, the CPU  41  reads the effect image corresponding to the effect image of “Lose” from the ROM  42 , and displays the effect image in the display region  92  (see  FIG. 8B ). Next, the main CPU  41  executes a payout process of “Mini” (step S 506 ). Specifically, the main CPU  41  executes a coin-payout process corresponding to a “Mini” payout. Where the coins are deposited, the main CPU  41  executes a process for adding the number of paid-out coins to the credit amount stored in the RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. The main CPU  41  terminates the jackpot bonus game execution process when executing the process at step S 506 . 
     On the other hand, upon judging that the “Win” effect is read (step S 504 : YES), the main CPU  41  displays a second effect selection image (step S 507 ). Specifically, the main CPU  41  displays in the display region  92  a selection screen for determining a type of the jackpot bonus game, in a manner to make the symbol selected at step S 502  identifiable. 
     Next, the main CPU  41  judges whether or not the predetermined symbol has been selected (step S 508 ). Specifically, main CPU  41  judges weather or not symbols that were not selected in step S 502  are selected via a touch panel  69 . Upon judging that a predetermined symbols are not selected (step S 508 : NO), the main CPU  41  controls the current step to return to the process at step S 508 . 
     On the other hand, upon judging that the predetermined symbol has been selected (step S 508 : YES), the main CPU  41  displays an effect image corresponding to the selected symbol (step S 509 ). Specifically, the main CPU  41  sequentially reads out of the ROM  42  the effect image corresponding to the symbol selected at step S 502 , and displays the effect image in the display region  92 . 
     Next, the main CPU  41  judges whether or not a “Win” effect is read (step S 510 ). Specifically, the main CPU  41  judges whether or not the effect image read at step S 509  corresponds to the “Win” effect. Upon judging that the read-out image does not correspond to the “Win” effect (step S 510 : NO), the main CPU  41  displays the effect image of “Lose” (step S 511 ). Specifically, the main CPU  41  reads from the ROM  42  the effect image corresponding to the effect image of “Lose”, and displays the effect image in the display region  92  (see  FIG. 9A ). Next, the main CPU  41  executes a payout process of “Major” (step S 512 ). Specifically, the main CPU  41  executes a coin-payout process corresponding to a “Major” payout. Where the coins are deposited, the main CPU  41  executes a process for adding the number of paid-out coins to the credit amount stored in the RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. The main CPU  41  terminates the jackpot bonus game execution process when executing the process at step S 512 . 
     On the other hand, upon judging that the “Win” effect is read (step S 510 : YES), the main CPU  41  displays the effect image of “Win” (step S 513 ). Specifically, the main CPU  41  reads from the ROM  42  the effect image corresponding to the effect image of “Win”, and displays the effect image in the display region  92  (see  FIG. 9B ). Next, the main CPU  41  executes a payout process of “Mega” (step S 514 ). Specifically, the main CPU  41  performs the coin-payout process corresponding to “Mega”. Where the coins are deposited, the main CPU  41  executes a process for adding the number of paid-out coins to the credit amount stored in the RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. The main CPU  41  terminates the jackpot bonus game execution process when executing the process at step S 514 . 
     Next, a slot machine  100  according to a second embodiment will be described in detail with reference to the drawings. Here, the slot machine according to the second embodiment described below is a so-called hybrid type slot machine, which has a transparent liquid crystal panel allocated in front of a plurality of mechanical reels supported in a rotatable manner, and executes a game by displaying images of various types of symbols drawn on an outer peripheral surface of the mechanical reels through the transparent liquid crystal panel. The slot machine according to the second embodiment has an appearance, circuitry, and the like that are substantially the same as those of the slot machine  10  according to the first embodiment. Thus, a duplicated explanation is omitted here. In addition, the constituent elements corresponding to those of the slot machine  10  are designated by the same reference numerals and are explained. 
       FIG. 15  is a view schematically depicting a frame format of an appearance of a slot machine according to a second embodiment. As shown in  FIG. 15 , the slot machine  100  is rotatably provided with three reels  101   a  to  101   c.  A symbol column made up of the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” is drawn on the respective one of the outer circumferential surfaces of the reels  101   a  to  101   c.    
     A main liquid crystal panel  202  formed of a transparent liquid crystal panel, which is disposed at the main door, is provided in front of the respective reels  101   a  to  101   c.  The main liquid crystal panel  202  displays the symbol display region  28  with visually recognizable rear surface so as to surround symbols which were drawn on the reels  101   a  to  101   c  and displayed in a stopped state, respectively. The symbols drawn on the reels  101   a  to  101   c  are visualized by rendering the symbol display region  28  transparent. 
     In a symbol display region  28 , symbols with plural types of numbers assigned, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged. 
     Furthermore, a main liquid crystal panel  202  and an input display region  70  that displays an input combination of numbers displays a selection display image  71  which shows the desired symbol has been selected. Then, any of symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” are rearranged. 
       FIG. 16  is a flowchart showing a subroutine of the game execution process invoked and performed at step S 102  of the subroutine shown in  FIG. 10  according to the second embodiment. First, the main CPU  41  performs a symbol selection process (step S 601 ). Specifically, main CPU  41  displays a symbol assigned with plural types of numbers for a combination of numbers to be input. Then a combination of numbers is displayed from the displayed symbols. 
     Next, the main CPU  41  judges whether a coin has been bet or not (step S 602 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the 1-BET switch  26 S when the 1-BET button  26  is pressed, or alternatively, being output from the MAX-BET switch  27 S when the MAX-BET button  27  is pressed. The main CPU  41  controls the current step to return to the process at the step S 602  upon judging that no coin has been bet (step S 602 : NO). 
     On the other hand, the main CPU  41  subtracts the number of bet coins from the credit amount stored in the RAM  43  (step S 603 ) upon judging that a coin has been bet (step S 602 : YES). In the case where the number of bet coins is greater than the credit amount stored in the RAM  43 , the main CPU  41  controls the current step to return to step S 101  without performing the process for subtracting the number of bet coins from the credit amount stored in the RAM  43 . In the case where the number of bet coins exceeds the upper limit (fifty coins in this embodiment) of coins that can be bet in one game, the main CPU  41  controls the process to shift to step S 604  without performing the process for subtracting the number of bet coins from the credit amount stored in the RAM  43 . 
     The main CPU  41  then judges whether or not the start button  23  has been set to ON (step S 604 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the start switch  23 S when the start button  23  is pushed. The main CPU  41  controls the step to return to step  604  upon judging that the start button  23  has not been set to ON (step S 604 : NO). Where the start button  23  has not been set to ON (for example, where an instruction has been input to terminate the game without setting the start button  23  to ON), the main CPU  41  cancels acceptance of a subtraction result at step S 603 . 
     On the other hand, upon judging that the start button  23  has been set to ON (step S 604 : YES), the main CPU  41  performs the symbol rearrangement process (step S 605 ). Specifically, the CPU  41  executes the program stored in the RAM  43  and determines the symbols to be rearranged in the symbol matrix SM displayed on the lower image display panel  16 . The symbols are determined from among the symbols, “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and the “stack of bills  129 ”. This determination is based on the symbol weighting data and random numeric values sampled by sampling the random numeric values in a numerical range which comes under a predetermined range of random numeric values. The CPU  41  then rearranges the symbols in the symbol matrix SM. 
     Next, the main CPU  41  judges whether or not a prize has been established (step S 606 ). Specifically, the main CPU  41  judges whether or not a predetermined combination of symbols having been rearranged in the symbol matrix SM or numbers assigned to a rearranged symbol on a winning line corresponds to the input numbers. Here, the prize is established on condition that a predetermined number of symbols of the same type are rearranged in the symbol matrix SM and also on condition a combination of numbers assigned to symbols corresponds to a combination stored in RAM  42  (see  FIG. 5 ). 
     Upon judging that the prize is established (step S 606 : YES), the main CPU  41  then executes a coin-payout process in accordance with the amount of bet and the number of coins set for the winning number (step S 607 ). Where the coins are deposited, the main CPU  41  executes a process for adding the number of paid-out coins to the credit amount stored in the RAM  43 . On the other hand, in the coin-payout process, the main CPU  41  transmits the control signal to the hopper  66  to pay out the predetermined amount of coins. 
     On the other hand, the main CPU  41  judges whether a free game trigger has been established or not (step S 608 ) when judging that the prize is not established (step S 606 : NO) or executing the process at step S 607 . Specifically, the main CPU  41  executes the program stored in the RAM  43  to sample the random numeric values in a numerical range which comes under a predetermined range of random numeric values, thereby judging whether or not the free game trigger condition has been satisfied based on the sampled random numeric values. When a free game trigger condition is met (step S 608 : YES), during a free game execution process, the main CPU  41  sequentially reads and executes the game programs or the like and executes a free game process. Upon terminating this process, the main CPU  41  controls the step to move to step S 612 . 
     On the other hand, upon judging that the free game trigger has not been established (step S 608 : NO), the main CPU  41  judges whether or not a jackpot bonus game trigger has been established (step S 610 ). Specifically, the main CPU  41  executes the program stored in the RAM  43  to sample the random numeric values in a numerical range which comes under a predetermined range of random numeric values, thereby judging whether or not the jackpot bonus game trigger has been established based on the sampled random numeric values. The main CPU  41  performs the jackpot bonus game execution process (step S 611 ) when judging that the bonus game trigger has been established (step S 610 : YES). In this jackpot bonus game, the main CPU  41  sequentially reads and executes the game programs or the like from the ROM  42  to execute the jackpot bonus execution process. 
     On the other hand, the main CPU  41  judges whether or not the judgment of the correspondence of a combination of numbers has been initiated plural times (step S 612 ), when judging that the jackpot bonus trigger has not been established (step S 612 : NO) or terminating the process at step S 609 . Specifically, the main CPU  41  judges whether or not a combination of symbols assigned with numbers corresponds to the input combination of numbers was judged plural times. The main CPU  41  terminates the game execution process when it is judged that judgments were not established plural times (step S 612 : NO). 
     On the other hand, upon judging that the judgments have been established plural times (step S 612 : YES), the main CPU  41  initiates a symbol selection termination process (step S 613 ). During this symbol selection termination process, main CPU  41  stops displaying the combination of numbers on input display region  70  and numbers assigned on symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, and “villa  128 ” input and stored in RAM  43  are cleared. 
       FIG. 17  is a flowchart showing a subroutine of the symbol selection execution process invoked and performed at step S 201  of the subroutine shown in  FIG. 11 , according to the second embodiment. First, the main CPU  41  judges whether or not the side-BET has been set to ON (step S 701 ). Specifically, the main CPU  41  judges whether or not an input signal has been received, the signal being output from the side-BET switch  85 S when the side-BET button  85  is pushed. Upon judging that the side-BET button  85  has not been set to ON (step S 701 : NO), the main CPU  41  terminates the symbol selection process. 
     On the other hand, upon judging that the side-BET button  85  has been set to ON (step S 701 : YES), the main CPU  41  allows the memory to be writable (step S 702 ). Specifically, main CPU  41  allows RAM  42  numbers that correspond to the plural types of numbers assigned to symbols via a touch panel  69   
     Next, CPU  41  displays symbol selection image (step S 703 ). Specifically, the main CPU  41  rearranges symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ”, for inputting numbers that correspond to the plural types of numbers assigned to symbol via the touch panel in any of symbol matrixes SM (see  FIG. 4 ). 
     Next, the main CPU  41  judges whether or not the predetermined manipulation has been detected (step S 704 ). Specifically, the main CPU  41  judges whether or not numbers assigned to symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ” on rearranged on any symbol matrix SM via a touch panel  69  has been input. Upon judging that a predetermined process has not been detected (step S 704 : NO), the main CPU  41  controls the step to move to step S 704 . 
     On the other hand, main CPU  41  stores combinations of numbers (step S 705 ) when a predetermined process has been detected (step S 704 ). Specifically, the main CPU  41  stores the numbers assigned onto symbols “main character  121 ”, “sub character  122 ”, “office building  123 ”, “gold bullion  124 ”, “car  125 ”, “stock certificate  126 ”, “jet  127 ”, “villa  128 ”, and “stack of bills  129 ”, that were input in step S 704  onto RAM  43 . 
     Next, the main CPU  41  displays the combination (step S 706 ). Specifically, main CPU  41  displays a combination of numbers that were stored in the memory display region  70  (see  FIG. 4 ). The main CPU  41  terminates the symbol selection process when terminating this process. 
     While the embodiment according to the present invention has been described, the description presents only some of the specific examples and is not intended to limit the present invention in any way and specific constructions of each means and the like can be properly changed in terms of design. Moreover, the effects described in the embodiment of the present invention are only the most preferable effects generated from the present invention and the effects to be caused by the present invention is not limitative thereto.