Patent Publication Number: US-2007105621-A1

Title: Gaming machine, game control method and game system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
      This application claims benefit of priority based on Japanese Patent Application No. 2005-322313 filed on Nov. 7, 2005. 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 gaming machine such as a slot machine in which a game is conducted using a game media (game valuable) such as a coin and the like, a game control method for the gaming machine, and a game system comprising the gaming machine and a control device.  
      2. Discussion of the Background  
      Conventionally, in a facility in which gaming machines such as a slot machine are installed, a game is played by inserting various kinds of game media such as a coin, cash and the like into a gaming machine. Each gaming machine pays out a dividend to a player according to a prize wining state (a result of playing the game) generated while the game is in progress.  
      In a casino where plural slot machines are installed, a credit spent in each slot machine is partly reserved and in a case where the reservation reaches a predetermined amount, one of the slot machines provides a so-called “jackpot” paying out a big amount, which is not paid out in an ordinary hit (JP-A 2003-117053). In such slot machines, a hit in each machine usually occurs on a preset probability and a player advances a game with expectation of the hit to be encountered. One of the slot machines has a chance to hit a jackpot at a timing in a lottery different from a common lottery in which a hit based on the above-mentioned probability is set in the slot machines. Generally, plural casinos are interconnected in a network in order to increase a payout amount in a jackpot.  
      Furthermore, a system has been available in which a host computer and plural gaming machines are interconnected on a network and the generating of a bonus in the gaming machines is controlled by the host computer (U.S. Pat. No. 5,820,459). In this system, not only is the number of coins inserted into each gaming machine added up, but part of a total number of inserted coins in the plural gaming machines are separately added up as a bonus pool. The host computer gives a bonus qualification to a gaming machine in which the number of inserted coins reaches a predetermined number. The host computer transmits a command to one gaming machine selected from gaming machines having bonus qualification, when a value of the bonus pool reaches a predetermined threshold value. The gaming machine which received the command is enabled to play a bonus game high in gambling characteristic.  
      In a slot machine described in JP-A 2003-117053, however, it is a player who plays a game in a gaming machine selected in a lottery that enjoys a profit from a jackpot. Hence, there has arisen a case where a player having spent many coins cannot enjoy a jackpot at all, but another player who has just started the game acquires a jackpot profit.  
      In the system described in U.S. Pat. No. 5,820,459 as well, a chance to acquire the profit of a bonus game is one of gaming machines in which a total number of inserted coins reaches a predetermined number. A chance to acquire the profit of a bonus game is not always given to a player having spent many coins. Therefore, in the system described in U.S. Pat. No. 5,820,459, there has arisen a case where a player having spent many coins cannot secure the profit of a bonus game and another player who has just started the game acquires a bonus game profit, in a similar way to that in a slot machine described in JP-A 2003-117053.  
      In the system described in U.S. Pat. No. 5,820,459, part of the number of inserted coins in each of plural gaming machines is added up as a bonus pool. Hence, in a case where an operation rate of the gaming machines in the system is low, a player, who has spent many of coins, has had a possibility not to be rewarded by the profit of a bonus game since the value of the bonus pool does not reaches a predetermined threshold value. Moreover, since the bonus game in the system described in U.S. Pat. No. 5,820,459 is high in gambling characteristic, there has arisen a case where the profit of the bonus game cannot be acquired sufficiently by a player, even when he is given a chance capable of acquiring the profit.  
      If such circumstances occur, a player who has spent many coins may feel unpleasant against the game, build up distrust thereto, or lose interest in or concern on the game.  
      The contents of JP-A 2003-117053 and U.S. Pat. No. 5,820,459 are incorporated herein by reference in their entirety.  
     SUMMARY OF THE INVENTION  
      The present invention has been made in light of the above-mentioned problems and it is an object of the present invention to provide: a gaming machine capable of preventing a player who has spent many of the game media such as coins from feeling unpleasant against a game, building up a distrust thereto, or losing interest in or concern on the game; a game control method related to the gaming machine; and a gaming machine system equipped with the gaming machine and a control device.  
      In order to solve the above-mentioned problems, the present, invention provides the following configuration:  
      (1) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode,  
      wherein  
      the processing device executes:  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing reading from the storage device a program for providing the player with a predetermined profit when a predetermined variable, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value that is an object of comparison with the predetermined variable, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (1), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. The player is provided with a predetermined profit when a predetermined variable, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value that is an object of comparison with the predetermined valuable.  
      It is therefore possible for the player to shift the game mode from the without-insurance mode to the with-insurance mode by inserting a predetermined number of game media or a specific value corresponding thereto. Further, in the with-insurance mode, even in cases including a case where the player consumes a large number of game media by playing games for a long period of time, if continuously playing games until the predetermined variable reaches the set value, the player can obtain a predetermined profit.  
      Further, since an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value is output from the output means when the command concerning the with-insurance mode is output in the with-insurance mode, it is possible to get the player interested in or concerned on the predetermined profit provided when the predetermined valuable reaches the set value.  
      Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (2) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing reading from the storage device a program for generating a second special game state that is a game state advantageous to the player and is the same kind of game state as or a different kind of game state from the first special game state when the number of games, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value that is an object of comparison with the number of games, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (2), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. A second special game state is then generated when the number of games, counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the number of games reaches the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (3) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode, and connected through a communication line to a control device which counts the number of games accumulatively for every gaming machine of plural gaming machines,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing transmitting an identification information on a gaming machine stored in the storage device to the control device through the communication line every time a game is played after the game mode has been shifted to the with-insurance mode;  
      a processing receiving a command signal transmitted from the control device when the number of games counted accumulatively by the control device based on the identification information on the gaming machine reaches a set value that is an object of comparison with the number of games;  
      a processing reading from the storage device, based upon the command signal, a program for generating a second special game state that is a game state advantageous to a player and is the same kind of game state as or a different kind of game state from the first special game state, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (3), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. A second special game state is then generated upon receipt of a command signal transmitted from the control device when the number of games, counted with the control device after the game mode has been shifted to the with-insurance mode, reaches a set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the number of games reaches the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (4) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing counting accumulatively the number of games every time a game is played after the game mode has been shifted to the with-insurance mode;  
      a processing determining whether or not the number of games has reached a set value;  
      a processing reading from the storage device a program for generating a second special game state that is a game state advantageous to a player and is the same kind of game state as or a different kind of game state from the first special game state, when the number of games is determined to have reached the set value, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (4), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. The number of games is then accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode. Further, it is determined whether or not the number of games has reached a set value. When the number of games is determined to have reached the set value, a second special game state is generated. Further, based upon data for output, an image or sound corresponding to the remaining number until the number of games reaches the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (5) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing reading from the storage device a program for generating a second special game state that is a game state advantageous to the player and is the same kind of game state as or a different kind of game state from the first special game state when the payment balance in terms of the game media, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, becomes equal to or less than a set value that is an object of comparison with the payment balance in terms of the game media, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (5), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. A second special game state is then generated when a payment balance in terms of the game media becomes equal to or less than a set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (6) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode, and connected through a communication line to a control device which counts the payment balance in terms of the game media accumulatively for every gaming machine of plural gaming machines,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing transmitting the number of game media inserted and paid out in a game played by a player together with an identification information on a gaming machine, which are stored in the storage device to the control device through the communication line every time a game is played after the game mode has been shifted to the with-insurance mode;  
      a processing receiving a command signal transmitted from the control device when the payment balance in terms of the game media counted accumulatively by the control device, based on the identification information on the gaming machine and the number of game media inserted and paid out in a game played by a player, is equal to or less than a set value that is an object of comparison with the payment balance in terms of the game media;  
      a processing reading from the storage device, based upon the command signal, a program for generating a second special game state that is a game state advantageous to a player and is the same kind of game state as or a different kind of game state from the first special game state, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (6), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. A second special game state is then generated upon receipt of a command signal transmitted from the control device when a payment balance in terms of the game media, counted with the control device after the game mode has been shifted to the with-insurance mode, becomes equal to or less than a set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (7) A gaming machine equipped with a processing device, a storage device, an image or sound output device, and an input device for inputting a command concerning a with-insurance mode,  
      wherein  
      the processing device executes:  
      a processing determining one winning combination selected from plural winning combinations determined in advance by executing a lottery program stored in the storage device;  
      a processing reading from the storage device a program for generating a first special game state that is a game state advantageous to a player when the determined winning combination is a special winning combination, and executing the program;  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing counting accumulatively the payment balance in terms of the game media every time a game is played after the game mode has been shifted to the with-insurance mode;  
      a processing determining whether or not the payment balance in terms of the game media is equal to or less than a set value;  
      a processing reading from the storage device a program for generating a second special game state that is a game state advantageous to a player and is the same kind of game state as or a different kind of game state from the first special game state, when the payment balance in terms of the game media is determined to be equal to or less than the set value, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value, upon receipt of the output requesting signal from the input device in the with-insurance mode.  
      According to the configuration (7), the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted. A payment balance in terms of the game media is then accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode. Further, it is determined whether or not the payment balance in terms of game media has become equal to or less than a set value. When the payment balance in terms of the game media is determined to have become equal to or less than the set value, a second special game state is generated. Moreover, based upon data for output, an image or sound corresponding to the remaining number until the payment balance in terms of the game media becomes equal to or less than the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (8) The gaming machine according to any one of the configurations (1) to (7),  
      wherein  
      the processing device executes:  
      a processing accepting an insertion of game media, the number of which is required for shifting the game mode from the without-insurance to the with-insurance mode, upon receipt of a predetermined signal from the input device in the without-insurance mode.  
      According to the configuration (8), upon operation of the input device in the without-insurance mode, the player is allowed to insert game media (for example, credits), the number of which is required for shifting the game mode from the without-insurance to the with-insurance mode, and then the game mode shifts to the with-insurance mode. Since the shift to the with-insurance mode is easily accepted by operating the input device, it becomes possible to improve the convenience of the gaming machine.  
      The present invention provides the following configuration:  
      (9) The gaming machine according to any one of the configurations (1) to (7),  
      wherein  
      the output device is a display device having a display area for images,  
      the input device is a touch panel that is placed on the front side of the display area, and capable of detecting a contact by the player and outputting a signal indicating the contact position upon detection of the contact, and  
      the processing device executes:  
      a processing displaying a shift command input image for inputting a command requesting the shift to the with-insurance mode on the display area in the without-insurance mode;  
      a processing accepting the insertion of game media, the number of which is required for shifting the game mode from the with-out insurance mode to the with-insurance mode when the signal indicating the contact position corresponding to the display position of the shift command input image is output from the touch panel while the shift command input image is being displayed;  
      a processing displaying a display command input image for inputting a command requesting for a display of an image concerning the with-insurance mode at the substantially same position as the display position of the shift command input image on the display area in the with-insurance mode; and  
      a processing receiving the output requesting signal when a signal indicating the contact position corresponding to the display position of the display command input image is output from the touch panel as the output requesting signal while the display command input image is being displayed.  
      According to the configuration (9), the processing device displays the shift command input image on the display area in the without-insurance mode, and accepts the insertion of game media, the number of which is required for shifting the game mode from the without-insurance mode to the with-insurance mode when the signal indicating the contact position corresponding to the display position of the shift command input image is output from the touch panel while the shift command input image is being displayed.  
      Therefore, in the without-insurance mode, the player is allowed to input the command for shifting the game mode from the without-insurance mode to the with-insurance mode by touching the shift command input image through the touch panel.  
      Moreover, in the with-insurance mode, the processing device displays the display command input image on the display area, and then receives the output requesting signal when the signal indicating the contact position corresponding the display position of the display command input image is output from the touch panel as the output requesting signal while the display command input image is being displayed.  
      Upon receipt of the output requesting signal, the processing device displays the image indicating the remaining number until the predetermined valuable (for example, the number of games, payment balance in terms of the game media) reaches the set value on the display area.  
      Therefore, in the with-insurance mode, the player can input the command for displaying the image showing the remaining number until the predetermined valuable reaches the set value by touching the display command input image through the touch panel.  
      As described above, in accordance with the configuration of (9), the image (shift command input image or display command input image) is displayed at a predetermined position on the display area, and the function of the image in the game is made different depending on the without-insurance mode and the with-insurance mode. With this arrangement, the display area of the display device can be effectively utilized.  
      The present invention provides the following configuration:  
      (10) A game control method comprising:  
      a step for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted;  
      a step for providing the player with a predetermined profit when a predetermined variable, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value that is an object of comparison with the predetermined variable;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting, in the with-insurance mode, an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value when the player inputs a command concerning the with-insurance mode. According to the configuration (10), the game mode is shifted from the without-insurance mode to the with-insurance mode on condition that a specific number of game media have been inserted. The player is then provided with a predetermined profit when a predetermined variable, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches the set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      The present invention provides the following configuration:  
      (11) A game system comprising:  
      a gaming machine equipped with a processing device, a storage device and an image or sound output device, and an input device for inputting a command concerning a with-insurance mode; and  
      a control device connected with the gaming machine through a communication line,  
      wherein  
      the processing device executes:  
      a processing reading from the storage device a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of game media have been inserted, and then executing the program;  
      a processing reading from the storage device a program for providing the player with a predetermined profit upon receipt of a predetermined signal from the control device, and then executing the program;  
      a processing receiving an output requesting signal output from the input device when the player operates the input device; and  
      a processing outputting to the output device, based upon data for output stored in the storage device, an image or sound corresponding to the remaining number until a predetermined valuable reaches a set value, upon receipt of the output requesting signal from the input device in the with-insurance mode, and  
      the control device executes:  
      a processing accumulatively counting the predetermined variable in the gaming machine every time a game is played after the game mode has been shifted to the with-insurance mode; and  
      a processing transmitting the predetermined signal to the gaming machine when the predetermined variable reaches a set value that is an object of comparison with the predetermined variable.  
      According to the configuration (11), the game mode is shifted from the without-insurance mode to the with-insurance mode on condition that a specific number of game media have been inserted. The player is then provided with a predetermined profit when a predetermined variable, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches the set value. Further, based upon data for output, an image or sound corresponding to the remaining number until the predetermined valuable reaches the set value is output to the output device when the player operates the input device in the with-insurance mode. Therefore, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game.  
      As a result, according to the present invention, it can be prevented for a player who has spent many of the game media from feeling unpleasant against the game, building up distrust thereto, or losing interest in or concern on the game. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a schematic diagram showing the entire construction of a game system according to one embodiment of the present invention;  
       FIG. 2  is a perspective view schematically showing a gaming machine according to one embodiment of the present invention;  
       FIG. 3  is a schematic view showing the symbol sequence depicted on the outer circumferential surface of each reel;  
       FIG. 4  is a block diagram showing the internal construction of the gaming machine shown in  FIG. 2 ;  
       FIG. 5  is a block diagram showing the internal construction of a control device according to one embodiment of the present invention;  
       FIG. 6  is a figure schematically showing an example of correspondence table between a gaming machine identification number and a game history;  
       FIG. 7  is a figure schematically showing an example of correspondence table between a set value and the number of payouts;  
       FIG. 8  is a figure schematically showing another example of correspondence table between a set value and the number of payouts;  
       FIG. 9  is a flowchart showing a procedure in an authentication reading processing for a game program and a game system program executed by a mother board and a gaming board shown in  FIG. 4 ;  
       FIG. 10  is a flowchart showing a subroutine of a game mode selection processing;  
       FIG. 11  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the without-insurance mode;  
       FIG. 12  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the without-insurance mode;  
       FIG. 13  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the with-insurance mode;  
       FIG. 14  is a flowchart showing a subroutine of a game execution processing;  
       FIG. 15  is a flowchart showing a subroutine of a lottery processing;  
       FIG. 16  is a figure describing a relationship among winning combinations of plural kinds, establishment possibility of each winning combination and the number of coin-out in the present embodiment;  
       FIG. 17  is a flowchart showing a subroutine of a reel rotating control processing;  
       FIGS. 18A  to  18 D are side views for describing a rotating operation of the reel;  
       FIG. 19  is a schematic diagram showing a correspondence table between the number of steps and the code No.;  
       FIG. 20  is a flowchart showing a subroutine of a help image display processing;  
       FIG. 21  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the with-insurance mode;  
       FIG. 22  is flowchart showing a subroutine of a bonus game processing;  
       FIG. 23  is a flowchart showing a subroutine of a return mode processing;  
       FIG. 24  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel when the game state shifts to the return mode (when the second special game state is generated);  
       FIG. 25  is a flowchart showing a subroutine of a counting processing;  
       FIG. 26  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel when  30  games are left to be played before the game state is shifted to the return mode; and  
       FIG. 27  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel when five games are left to be played before the game state is shifted to the return mode. 
    
    
     DESCRIPTION OF THE EMBODIMENTS  
       FIG. 1  is a schematic diagram showing the entire construction of a game system according to one embodiment of the present invention.  
      A game system  100  includes: plural gaming machines  10 ; and a control device  200  connected to the gaming machines  10  through a predetermined communication line  101 . Such a game system  100  may be constructed in one recreation facility capable of playing various kinds of games such as a bar, a casino and the like, or between plural recreation facilities. When the game system is constructed in one recreation facility, the game system  100  may be constructed on each floor or section of the recreation facility. The communication line  101  is not particularly limited, and may be wired or wireless, and either a dedicated line or a switched line can be used.  
      In the embodiment, the gaming machine  10  is a slot machine. In the present invention, however, a gaming machine is not limited to a slot machine, and for example, a so-called single gaming machine such as a video slot machine, a video card gaming machine and the like may be adopted, and a so-called mass game (multi-terminal gaming machine) such as a racing game, a bingo game, a public lottery and the like, which is a game that takes a predetermined time for a result to be displayed, may also be adopted.  
      In the gaming machine  10 , a coin, a note or an electronic valuable information corresponding thereto is used as a game media. In the present invention, however, the game media is not particularly limited, and for example, a medal, a token, an electronic money and a ticket can be used. The ticket is not particularly limited and may include, for example, a ticket with a bar code as described later, and of the like tickets.  
      The control device  200  controls a plurality of gaming machines  10 . Particularly in the present embodiment, the control device  200  controls shift to a return mode in each of the gaming machines  10 . The return mode corresponds to a second special game state in the present invention. In the return mode, a specific number of coins are paid out or a specific number of credits are added. It is to be noted that the control device  200  may control the shift to the return mode so as to control a return rate. In such a case, the control device  200  may individually control a return rate of each of the gaming machines  10  or may control a return rate over all the gaming machines  10 . Further, in the present invention, a later described ticket  39  with a bar code (see  FIG. 2 ) may be issued when the second special game state is generated (when the game state is shifted to the return mode).  
      The control device  200  may further function as a so-called hole server which is installed in a recreation facility having plural gaming machines  10 , or as a server which collectively controls plural recreation facilities. Moreover, every gaming machine  10  has its own identification number, and the source of data transmitted to the control device  200  from each of the gaming machines  10  is distinguished therein by their identification numbers. The identification number is also used to designate a transmission destination of data transmitted to the gaming machine  10  from the control device  200 .  
      The identification number of a gaming machine corresponds to the identification information on a gaming machine of the present invention. The identification information on a gaming machine of the present invention is not particularly limited, and examples thereof may include: a letter, a symbol, a figure, a combination thereof, and the like.  
       FIG. 2  is a perspective view schematically showing a gaming machine according to one embodiment of the present invention.  
      The gaming machine  10  includes: a cabinet  11 ; a top box  12  placed on the upper side of the cabinet  11 ; and a main door  13  provided at the front face of the cabinet  11 . Inside the cabinet  11 , three reels  14  ( 14 L,  14 C and  14 R) are rotatably installed. Twenty two designs (hereinafter, also referred to as symbols) are depicted as symbol sequences on the outer circumferential surface of each of the reels  14 .  
      A lower image display panel  16  is provided over the reels  14  in the main door  13 . The lower image display panel  16  is provided with a transparent liquid crystal panel, and various kinds of information, representation image and the like associated with the game are displayed while the game is played. The lower image display panel  16  corresponds to an image output device in the present invention.  
      A number-of-credits display section  31  and a number-of-payouts display section  32  are formed on the lower image display panel  16 . The number of credited coins is displayed as an image on the number-of-credits display section  31 . The number of coins to be paid out is shown as an image on the number-of-payouts display section  32 , when a combination of symbols stop displayed on a winning line L is a predetermined combination.  
      Three display windows  15  ( 15 L,  15 C and  15 R), the back faces of which are visually recognizable, are formed on the lower image display panel  16 , and through each of the display windows  15 , three of the symbols depicted on the outer circumferential surface of each of the reels  14  are displayed. One winning line L traversing horizontally the three display windows  15  is formed on the lower image display panel  16 . The winning line L defines a combination of symbols. When a combination of symbols stop displayed on the winning line L is a predetermined combination, the number of coins corresponding to the combination and the number of inserted coins (the number of BETs) is paid out.  
      Moreover, in the present invention, for example, when: plural winning lines L which traverse horizontally or obliquely the three display windows  15  are formed; the winning lines L, the number thereof which becomes effective set to be dependent on the number of coin-in, become effective; and a combination of symbols stop displayed on the winning line L which became effective is a predetermined combination, the number of coins corresponding to the stop-displayed combination maybe paid out.  
      A touch panel  69 , which is not shown in the figure, is provided on the front face of the lower image display panel  16  and the player can input various kinds of commands (for example, a command concerning the with-insurance mode) by operating the touch panel  69 . The touch panel  69  corresponds to the input device in the present invention.  
      Provided below the lower image display panel  16  are: a control panel  20  constituting of plural buttons  23  to  27  which are input by the player, commands associated with progress of the game; a coin receivings lot  21  accepting coins into the cabinet  11 ; and a note identifier  22 .  
      The control panel  20  is provided with: a spin button  23 ; a change button  24 ; a CASHOUT button  25 ; a 1-BET button  26 ; and a maximum BET button  27 . The spin button  23  is used for inputting a command to start the rotating of the reels  14 . The change button  24  is used in a case where a player requests an attendant of a recreation facility to exchange money. The CASHOUT button  25  is used for inputting a command to pay out credited coins to a coin tray  18 .  
      The 1-BET button  26  is used for inputting a command to bet one coin of the credited coins. The maximum BET button  27  is used for inputting a command to bet the maximum number of coins that can be bet on one game (50 coins in the present embodiment) of the credited coins.  
      It is to be noted that in the present invention, insertion of the game media means consumption of the game media. The case of consuming the game media includes the case of betting the game media on a game as well as the case of consuming the game media so as to shift the game mode to a later described with-insurance mode. For example, when coins inserted into the coin receiving slot  21  are directly bet on a game, insertion of coins into the coin receiving slot  21  corresponds to insertion of a game media. However, when coins inserted into the coin receiving slot  21  are temporarily credited, and the credited coins are bet on a game by operating the 1-BET button  26  or the maximum BET button  27 , as in the present embodiment, the bet of the credited coins on the game corresponds to insertion of a game media.  
      The note identifier  22  is used not only for discriminating a false note from a true note but also for accepting the true note into the cabinet  11 . The note identifier  22  may be configured such that a ticket  39  with a bar code which will be described later can be read. A belly glass  34  on which characters and the like of the gaming machine  10  are depicted is provided on the front face of the lower portion of the main door  13 , that is, below the control panel  20 .  
      An upper image display panel  33  is provided on the front face of the top box  12 . The upper image display panel  33  comprises a liquid crystal panel, which displays, for example, a representation image, introduction of game contents, and explanation of a game rule. In the present embodiment, as does the lower image display panel  16 , the upper image display panel  33  corresponds to the image output device in the present invention. It is to be noted that in the present invention, either the lower image display panel  16  or the upper image display panel  33  may correspond to the image output device.  
      A speaker  29  is provided in the top box  12 . The speaker  29  corresponds to a sound output device in the present invention. A ticket printer  35 , a card reader  36 , a data display  37  and a key pad  38  are provided beneath the upper image display panel  33 . The ticket printer  35  prints on a ticket a bar code in which data such as the number of credits, date, time, identification number of the gaming machine  10  and of the like data are encoded, and outputs the ticket  39  with a bar code. A player can make the ticket  39  with a bar code to be read by a second gaming machine and play a game in the second gaming machine, or exchange in a predetermined place (for example, at a cashier in the casino) of a recreation facility the ticket  39  with a bar code to notes.  
      The card reader  36  is used for reading data from a smart card and writing data onto a smart card. The smart card is a card to be carried by a player, and for example, data to identify a player and data concerning a history of a game played by a player are stored thereon. Data corresponding to a coin, a note or a credit may also be stored on the smart card. As an alternative of a smart card, a magnetic stripe card may be adopted. The data display  37  is a fluorescent display and the like, and it is used, for example, to display data read by the card reader  36  and data input by a player from the key pad  38 . The key pad  38  is used for inputting a command or data to issue a ticket and the like.  
       FIG. 3  is a schematic view showing the symbol sequence depicted on the outer circumferential surface of each reel.  
      Twenty two symbols each are depicted on the outer circumferential surface of the left reel  14 L, the middle reel  14  C and the right reel  14  R. A sequence of the symbols depicted on the outer circumferential surface of each of the reels  14  is different from one another. The sequences of the symbols are combinations of the following symbols: “JACKPOT 7”, “BLUE 7”, “BELL”, “CHERRY”, “STRAWBERRY”, “PLUM”, “ORANGE” and “APPLE”.  
      When the same three symbols of one of the symbols of “JACKPOT 7”, “BLUE7”, “BELL”, “CHERRY”, “STRAWBERRY”, “PLUM” and“ORANGE” are stop displayed on the winning line L, a predetermined number of credits is added to the account of the player as a credit owned by the player (see  FIG. 16 ). As for “CHERRY” and “ORANGE”, even if one or two of one of the symbols are stop displayed, a predetermined number of credits are added to the account of the player as credits owned by the player according to the number of the symbols stop displayed (see  FIG. 16 ).  
      The symbol sequence “APPLE” is a bonus game trigger (a symbol to transit to a bonus game). When three of the “APPLE” are stop displayed on the winning line L, a game state shifts to a bonus game. The bonus game corresponds to the first special game state. In the present embodiment, a bonus game is a free game (a game in which a predetermined number thereof can be played without inserting coins for BET).  
      In the present invention, the first special game state is not particularly limited as far as it is a game state advantageous to the player. A game state that is advantageous to the player is not particularly limited as far as it is more advantageous than an ordinary game state (a game state other than the first special game state or the second special game state) and examples thereof include: a state where more of the game media can be earned than in an ordinary game state, a state where the game media can be earned on a probability higher than in an ordinary game state, a state where the number of the game media spent by a player is less than in an ordinary game state and of the like state. More specifically, examples of the first special game state include a free game, a second game, a mystery bonus and the like.  
      The sequence of symbols depicted on each of the reels  14  are, when the spin button  23  is pressed after the 1-BET button  26  or the maximum BET button  27  is pressed to start a game, scroll displayed by scrolling downwards in the display windows  15  during the rotating of the reels  14 , and after a predetermined time elapses, the rotating of the reels  14  comes to a stop, and thus the sequence of symbols are stop displayed in the display windows  15 . Various kinds of winning combinations (see  FIG. 16 ) are predetermined based on combinations of symbols and when a combination of symbols corresponding to a winning combination stops on the winning line L, the number of payout coins corresponding to the winning combination is added to credits owned by the player. When a bonus game trigger has been established, a bonus game is generated.  
      When a return mode flag which will be described later has been set to the state “ON”, a game state shifts to a return mode after the symbols are stop displayed as described above. When a bonus game has been generated, the game state shifts to the return mode after the bonus game is over. The return mode corresponds to the second special game state. In the present embodiment, when the game state is shifted to the return mode, a specific number of coins are paid out, or a specific number of credits are added. It should be noted that in the present invention, the ticket  39  with a bar code where predetermined information is printed may be issued upon generation of the second special game state (when the game state shifts to the return mode).  
      In the present invention, the second special game state is not particularly limited as far as it is a game state advantageous to the player. Examples of such a game state include: a state where more of the game media can be earned than in an ordinary game state, a state where the game media can be earned on a probability higher than in an ordinary game state, a state where the number of the game media spent by a player is less than in an ordinary game state and of the like state. More specifically, examples of the second game state include a free game, a second game, a mystery bonus game and the like.  
      In the present invention, the second special game state may be a game state of the same kind as the first special game state, or a game state of a kind different from the first game state as in the present embodiment. When the second special game state is made to be a game state different from the first special game state, games can be high in versatility, which can enhance a sense of expectation for the second special game state. Moreover, a game state of the second special game state may be an exclusive game state generated only when the second special game state occurs. In such a situation, a sense of expectation for the second special game state can be further enhanced.  
       FIG. 4  is a block diagram showing the internal construction of the gaming machine shown in  FIG. 2 .  
      A gaming board  50  includes: CPU (Central Processing Unit)  51 , ROM  55  and boot ROM  52  which are interconnected to one another by an internal bus; a card slot  53 S which accepts a memory card  53 ; an IC socket  54 S which accepts GAL (Generic Array Logic)  54 .  
      The memory card  53  is constituted of non-volatile memories such as CompactFlash (registered trademark) and stores a game program and a game system program. The game program contains a lottery program. The lottery program is a program for determining symbols (code Nos. corresponding to the symbols) on each of the reels  14  which are to be stop displayed on the winning line L. The lottery program contains one or more of symbol weighting determination data, each corresponding to respective plural kinds of payout rates (for example, 80%, 84% and 88%). The symbol weighting determination data is data showing a correspondence relationship between a code No. (see  FIG. 3 ) of each symbol and one or plural random number values from a predetermined numerical value range (0 to 255), for each of the three reels  14 . A payout rate is determined based on data for setting a payout rate output from the GAL  54 , and the lottery is executed based on symbol weighting determination data corresponding to the payout rate.  
      The card slot  53 S is configured so that the memory card  53  can be inserted therein or drawn out therefrom, and connected to a mother board  40  through IDE bus. Therefore, a kind or contents of a game played in the gaming machine  10  can be changed by drawing out the memory card  53  from the card slot  53 S, writing a different game program and game system program thereon, and inserting the memory card  53  into the card slot  53 S thereafter. Moreover, a kind or contents of a game played in the gaming machine  10  can also be changed by changing a memory card  53  on which a game program and a game system program are stored to a different memory card  53  on which a different game program and game system program are stored. The game program includes a program related to progress in a game; a program for generating the first special game state; and a program for generating the second special game state. The game program further includes: image data and sound data output while a game is played; image data and sound data for notifying that the game mode has been shifted to the with-insurance mode; and data for output for outputting an image or sound corresponding to the remaining number until the number of games, accumulatively counted every time a game is played after the game mode has been shifted to the with-insurance mode, reaches a set value.  
      GAL  54  is one kind of PLD having an OR fixed array structure. GAL  54  is equipped with a plurality of an input port and an output port and when a predetermined data is input to the input port, data corresponding to the input data is output from the output port. The data output from the output port is the above-mentioned data for setting a payout rate.  
      The IC socket  54 S is configured such that GAL  54  can be mounted thereto or demounted therefrom, and connected to the mother board  40  through PCI bus. Therefore, data for setting a payout rate output from GAL  54  can be changed by drawing out GAL  54  from the IC socket  54 S, rewriting a program stored on GAL  54 , mounting GAL  54  to the IC socket  54 S thereafter. Moreover, data for setting a payout rate can also be changed by changing GAL  54  to a different GAL  54 .  
      CPU  51 , ROM  55  and boot ROM  52  interconnected to each other by the internal bus are connected to the mother board  40  by PCI bus. The PCI bus not only conducts signal transmission between the mother board  40  and the gaming board  50 , but also supplies electric power to the gaming board  50  from the mother board  40 . ROM  55  stores country identification information and an authentication program therein. Boot ROM  52  stores a preliminary authentication program, a program for CPU  51  to activate the preliminary authentication program (a boot code) and the like therein.  
      The authentication program is a program to authenticate a game program and a game system program (an alteration check program). The authentication program is stated along a procedure for confirmation and certification that the game program and the game system program that are objects of an authentication capture processing are not altered, that is, a procedure for conducting authentication of the game program and the game system program (an authentication procedure). The preliminary authentication program is a program for authenticating the above-mentioned authentication program. The preliminary authentication program is stated along a procedure for certification that an authentication program that is an object of an authentication processing is not altered, that is, a procedure for authenticating the authentication program (an authentication procedure).  
      The mother board  40  is constructed with a general-purpose mother board commercially available (a printed circuit board on which basic parts of a personal computer are mounted) and includes: a main CPU  41 ; ROM (Read Only Memory)  42 ; RAM (Random Access Memory)  43  and a communication interface  44 . The main CPU  41  is the processing device of the present invention.  
      ROM  42  is constituted of a memory device such as a flash memory and stores thereon a program such as BIOS (Basic Input/Output System) executed by the main CPU  41  and permanent data. When BIOS is executed by the main CPU  41 , not only is an initialization processing for predetermined peripheral devices conducted, but a capture processing for the game program and the game system program stored on the memory card  53  is also started via the gaming board  50 . In the present invention, contents of ROM  42  may be rewritable or not rewritable.  
      RAM  43  stores data and a program used at the time of operation of the main CPU  41 . RAM  43  can store the authentication program read through the gaming board  50  together with the game program and the game system program. RAM  43  is the storage device of the present invention.  
      RAM  43  is provided with a storage region for a return mode flag. The return mode flag is a flag to be referred to when a game state is to be selected whether it should be shifted to a return mode corresponding to the second special game state or not. The storage region of the return mode flag is constituted of a storage region with, for example, a predetermined number of bits and the return mode flag is turned “ON” or “OFF” according to storage contents in the storage region. If the return mode flag is set to the state “ON”, the game state thereafter shifts to the return mode.  
      Further, the RAM  43  is provided with a storage region of an insurance mode flag. The insurance mode flag is a flag to indicate whether the current mode is the with-insurance mode or the without-insurance mode. The storage region of the insurance mode flag for example comprises a storage region with a specific number of bits, and according to storage contents stored in the storage region, the insurance mode flag is set to “ON” or “OFF”. The insurance mode flag being “ON” indicates that the current mode is the with-insurance mode, whereas the insurance mode flag being “OFF” indicates that the current mode is the without-insurance mode. RAM  43  further stores data on the number of credits, the number of coin-in or coin-out for one game, and the like.  
      The communication interface  44  is used to communicate with the control device  200  through the communication line  101 . The main CPU  41  transmits the number of coin-in and the number of coin-out together with the gaming machine identification number of the gaming machine  10  to the control device  200  each time a game is played. The number of games, an accumulative number of coin-in and an accumulative number of coin-out is made to be associated with each gaming machine identification number, and stored in the control device  200 . In the control device  200 , a set value that is an object of comparison with the number of games is preliminary determined with respect to each gaming machine identification number, and when the number of games of one gaming machine  10  reaches a set value determined for that gaming machine  10 , a return command signal is transmitted from the control device  200 . When the main CPU  41  receives the return command signal through the communication interface  44 , the return mode flag is set to the state “ON”.  
      Both a body PCB (Printed Circuit Board)  60  and a door PCB  80  which will be described later are connected to the mother board  40  by USB. A power supply unit  45  is also connected to the mother board  40 . When electric power is supplied from the power supply unit  45  to the mother board  40 , not only is the main CPU  41  of the mother board  40  activated, but CPU  51  is also activated from electric power supplied through the PCI bus to the gaming board  50 .  
      Equipment and devices which generate input signals to be input to the main CPU  41 , and equipment and devices of which operations are controlled by a control signal output from the main CPU  41  are connected to the body PCB  60  and the door PCB  80 . The main CPU  41  executes a game program and a game system program stored in RAM  43  based on an input signal input to the main CPU  41 , and thereby performs a predetermined computational processing, stores results thereof into RAM  43  and transmits a control signal to each equipment and device as a control processing for each of the equipment and devices.  
      A lamp  30 , a sub CPU  61 , a hopper  66 , a coin detecting section  67 , a graphic board  68 , a speaker  29  as an output device, a touch panel  69  as an input device, a note identifier  22 , a ticket printer  35 , a card reader  36 , a key switch  38 S and a data display  37  are connected to the body PCB  60 . The lamp  30  is lit up in a predetermined pattern based on a control signal output from the main CPU  41 .  
      The sub CPU  61  controls the rotation and stopping of the reels  14  ( 14 L,  14 C and  14 R). A motor driving circuit  62  equipped with FPGA (Field Programmable Gate array)  63  and a driver  64  is connected to the sub CPU  61 . FPGA  63  is an electronic circuit such as LSI capable of programming and works as a control circuit of a stepping motor  70 . The driver  64  works as an amplifier circuit of a pulse to be input to the stepping motor  70 . The stepping motors  70  ( 70 L,  70 C and  70 R) which rotate each of the reels  14 , are connected to the motor driving circuit  62 . The stepping motor  70  is a 1-2 phase excitation type stepping motor.  
      In the present invention, an excitation type of the stepping motor is not particularly limited, and for example, a motor of a  2  or  1  phase excitation type can be adopted. A DC motor may be adopted instead of a stepping motor. When a DC motor is adopted, a deviation counter, a D/A converter and a servo amplifier are sequentially connected to the sub CPU  61  in this order and the DC motor is connected to the servo amplifier. A rotational position of the DC motor is detected by a rotary encoder and a current rotational position of the DC motor is supplied as data from the rotary encoder to the deviation counter.  
      An index detecting circuit  65  and a position change detecting circuit  71  are connected to the sub CPU  61 . The index detecting circuit  65  is used for detecting positions (indexes described later) of the rotating reels  14  and can also detect an out-of-order state of the reels  14 . As for the control of the rotating and stopping of the reels  14 , detailed description will be given later by making reference to the figures.  
      The position change detecting circuit  71  detects a change of stoppage positions of the reels  14  after the stopping of the rotating of the reels  14 . The position change detecting circuit  71  detects the change of stoppage positions of the reels  14 , for example, in a case where the stoppage position is changed by force by a player as if the combination of symbols was in a wining state, despite the fact that the combination of symbols is not actually in a wining state, and of the like cases. The position change detecting circuit  71  is configured to be capable of detecting the change of stoppage position of the reel  14  by, for example, detecting fins (not shown in the figure) attached with a predetermined space on the inner side of the reel  14 .  
      The hopper  66  is installed in the cabinet  11  and pays out a predetermined number of coins from a coin payout exit  19  to a coin tray  18  based on a control signal output from the main CPU  41 . A coin detecting section  67  is installed inside the coin payout exit  19  and when detecting that a predetermined number of coins has been paid out from the coin payout exit  19 , outputs an input signal to the main CPU  41 .  
      The graphic board  68  controls, based on a control signal output from the main CPU  41 , image displays on the upper image display panel  33  and the lower image display panel  16 , as an output device. The number of credits stored in RAM  43  is displayed on the number-of-credits display section  31  of the lower image display pane  116 . The number of coin-out is displayed on the number-of-payouts display section  31  of the lower image display panel  16 .  
      The graphic board  68  is equipped with VDP (Video Display Processor) which generates image data based on a control signal output from the main CPU  41  and a video RAM which temporarily stores image data generated by VDP, and of the like equipments. Note that image data used in generating image data with VDP is read from the memory card  53  and contained in a game program stored in RAM  43 .  
      The note identifier  22  not only discriminates a true note from a false note, but also accepts the true note into the cabinet  11 . The note identifier  22 , when accepting a true note, outputs an input signal to the main CPU  41  based on a face amount of the note. The main CPU  41  stores the number of credits corresponding to the amount of the note transmitted with the input signal into RAM  43 .  
      The ticket printer  35 , based on a control signal output from the main CPU  41 , prints on a ticket a bar code obtained by encoding data such as the number of credits, date and time, the identification number of the gaming machine  10 , and of the like data stored in RAM  43 , and outputs the ticket  39  with a bar code.  
      The card reader  36  transmits to the main CPU  41  data read from the smart card and writes data onto the smart card based on a control signal from the main CPU  41 . The key switch  38 S is provided on the keypad  38 , and when the keypad  38  is operated by a player, outputs a predetermined input signal to the main CPU  41 . The data display  37  displays, based on a control signal output from the main CPU  41 , data read by the card reader  36  and data input by a player through the key pad  38 .  
      The control panel  20 , a reverter  21 S, a coin counter  21 C and a cold cathode tube  81  are connected to the door PCB  80 . The control panel  20  is provided with a spin switch  23 S corresponding to the spin button  23 , a change switch  24 S corresponding to the change button  24 , a CASHOUT switch  25 S corresponding to the CASHOUT button  25 , a 1-BET switch  26 S corresponding to the 1-BET button  26 , and a maximum BET switch  27 S corresponding to the maximum BET button  27 . When the buttons  23  to  27  are operated by a player, each of the switches  23 S to  27 S corresponding thereto outputs input signals to the main CPU  41 .  
      The coin counter  21 C is installed inside the coin receiving slot  21 , and discriminates whether a coin inserted by a player into the coin receiving slot  21  is true or false. Coins other than the true ones are discharged from the coin payout exit  19 . The coin counter  21 C also outputs an input signal to the main CPU  41  when a true coin is detected.  
      The reverter  21 S operates based on a control signal output from the main CPU  41  and distributes coins recognized by the coin counter  21 C as true coins into a cash box (not shown in the figure) or the hopper  66 , which are disposed in the gaming machine  10 . In other words, when the hopper  66  is filled with coins, true coins are distributed into the cash box by the reverter  21 S. On the other hand, when the hopper  66  is not filled with coins, true coins are distributed into the hopper  66 . The cold cathode tube  81  works as a backlight installed on the back face sides of the lower image display panel  16  and the upper image display panel  33  and is lit up based on a control signal output from the main CPU  41 .  
       FIG. 5  is a block diagram showing the internal construction of a control device according to one embodiment of the present invention.  
      A control device  200  includes: CPU  201  as a processing device; ROM  202 ; RAM  203  as a temporary storage device; a communication interface  204 ; and a hard disc drive  205 . The communication interface  204  is connected to the communication interface  44  of the gaming machine  10  through the communication line  101 . ROM  202  stores a system program for controlling operations of the control device, a permanent data, and the like. RAM  203  temporarily stores data received from each of the gaming machines  10  and data such as results of the computational operation. Moreover, a game history of a gaming machine  10  is stored in the hard disc drive  205 , by being associated with the gaming machine identification number of each of the gaming machines  10 .  
       FIG. 6  is a figure schematically showing an example of correspondence table between a gaming machine identification number and a game history.  
      Each of the gaming machine identification numbers correspond to a game history based on the number of games, an accumulative number of coin-in, an accumulative number of coin-out, a payment balance in terms of the coins and a return rate of coin-out.  
      When CPU  201  receives the number of coin-in, the number of coin-out and the gaming machine identification number from the gaming machine  10  through the communication interface  204 , a game history corresponding to the gaming machine identification number is updated. More specifically,  1  is added to the number of games, the number of coins inserted is added to the accumulative number of coin-in and the number of coins paid out is added to the accumulative number of coin-out. Furthermore, a payment balance in terms of the coins and a return rate are calculated based on the accumulative number of coin-in and the accumulative number of coin-out. When determining that the number of games after update has reached a set value, the CPU  201  transmits as data a return command signal including the number of coin-out in the return mode, to the gaming machine  10 .  
       FIG. 7  is a figure schematically showing an example of correspondence table between a set value and the number of payouts.  
      The number of coin-out “500” in the return mode is assigned at a set value of “600”.  
      Note that the correspondence table shown in  FIG. 7  is stored on the hard disc drive  205  as data.  
      In the present invention, the number of payouts in the return mode is not necessarily constant, and for example, the number of payouts may change according to the game history and the like.  
       FIG. 8  is a figure schematically showing another example of correspondence table between a set value and the number of payouts.  
      At a set value “600”, “(−payment balance)×50% (provided that the number of coin-out=500 if a payment balance≧0)” is set as the number of coin-out in the return mode. Hence, if a payment balance is “−2000” when the number of games reaches 600, the number of coin-out is 1000, and if a payment balance is “−4000”, the number of coin-out is 2000.  
      Next, description will be given of a processing performed in the gaming machine  10 .  
       FIG. 9  is a flowchart showing a procedure in an authentication reading processing for a game program and a game system program executed by a mother board  40  and a gaming board  50  shown in  FIG. 4 . Note that the memory card  53  is inserted into the card slot  53 S on the gaming board  50  and GAL  54  is mounted to the IC socket  54 S.  
      When a power supply switch is turned on in the power supply unit  45 , the mother board  40  and the gaming board  50  are activated (steps S 1 - 1  and S 2 - 1 ). When the mother board  40  and the gaming board  50  are activated, separate processing are performed at the same time. That is, in the gaming board  50 , CPU  51  reads a preliminary authentication program stored in the boot ROM  52  and performs the preliminary authentication which in advance, prior to capturing the authentication program into the mother board  40 , confirms or certificates that the program is not altered according to the read preliminary authentication program (step S 2 - 2 ). On the other hand, in the mother board  40 , the main CPU  41  executes BIOS stored in ROM  42  to expand on RAM  43  compressed data incorporated in BIOS (step S 1 - 2 ). Then, the main CPU  41  executes BIOS expanded on RAM  43  to perform diagnosis on and initialization of various kinds of the peripheral devices (step S 1 - 3 ).  
      Then, since ROM  55  on the gaming board  50  is connected to the main CPU  41  through PCI bus, the main CPU  41  not only performs reading of the authentication program stored in ROM  55 , but also stores the read authentication program into RAM  43  (step S 1 - 4 ). On this occasion, the main CPU  41  takes a checksum according to ADDSUM method (a standard check function) with the help of the function of a standard BIOS of BIOS, and by performing a confirmation processing for whether or not storage is conducted without error, stores the authentication program into RAM  43 .  
      Then, after confirming what is connected to the IDE bus, the main CPU  41  accesses the memory card  53  inserted into the card slot  53 S through the IDE bus, and conducts reading of the game program and the game system program from the memory card  53 . In this case, the main CPU  41  reads  4  bites at a time of data constituting the game program and the game system program. Next, the main CPU  41  authenticates by confirming and certifying according to the authentication program stored in RAM  43 , that the read game program and game system program have not been altered (step S 1 - 5 ). When the authentication processing is normally completed, the main CPU  41  writes and stores in RAM  43  the game program and the game system program that have been an object of authentication (have been authenticated) (steps S 1 - 6 ). Then, main CPU  41  accesses through the PCI bus to GAL  54  mounted to the IC socket  54 S, reads data for setting a payout rate from GAL  54  and writes and stores the data in RAM  43  (step S 1 - 7 ). Then, the main CPU  41  not only reads through the PCI bus country identification information stored in ROM  55  on the gaming board  50 , but also stores the read country identification information into RAM  43  (step S 1 - 8 ).  
      After the processing is over, the main CPU  41 sequentially reads and executes the game program and the game system program to such that a game is progressed.  
      After the processing shown in  FIG. 9  is over, the main CPU  41  performs a game mode selection processing.  
       FIG. 10  is a flowchart showing a subroutine of a game mode selection processing.  
      The main CPU  41  conducts a processing for adding credits stored in RAM  43  as an interrupt processing when it receives a detection signal output from the coin counter  21 C in a case where the coin counter  21 C detects a coin inserted into the coin receiving slot  21  while executing the subroutine.  
      First, the main CPU  41  determines whether or not the insurance mode flag stored in the RAM  43  has been set to “ON” (step Sill). In determining that the insurance mode flag has not been set to “ON”, i.e., the insurance mode flag has been set to “OFF”, the main CPU  41  performs the processing of displaying an image of the without-insurance mode (step S 112 ).  
      In this processing, the main CPU  41  transmits a depiction command of the image for the without-insurance mode to the graphic board  68 . On the graphic board  68 , a VDP extracts image data from the RAM  43  to be developed in a video RAM, and produces one frame of image data to be outputted to the upper image display panel  33  and the lower image display panel  16 . As a result, for example, images as shown in  FIG. 11  are displayed on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 11  is a figure showing one example of images displayed on the upper image display panel and a lower image display panel in the without-insurance mode. In the figure, numeral  15  ( 15 L,  15 C,  15 R) denotes display windows. Numeral  31  denotes the number-of-credits display section. Numeral  32  denotes the number-of-payouts display section. Character L denotes the winning line.  
      On the right lower part of the lower image display panel  16 , an image  90  showing “INSURANCE BET $1.00, TOUCH TO BET” is displayed. The image  90  is an image for requesting the player to select the with-insurance mode and insertion of game media necessary for selection of the with-insurance mode. The player touches a predetermined part of the touch panel  69  corresponding to the display region of the image  90 , so as to input the command for selecting the with-insurance mode.  
      The image  90  corresponds to the shift command input image.  
      The selection of the with-insurance mode requires a specific number of credits (one dollar in the present embodiment) As an alternative of the number of credits, a note or a coin equivalent to the number of credits may be inserted. In a case where the with-insurance mode has been selected, when the number of games reaches a set value (for example, 600) without a bonus game being generated, the return mode flag is set to the state “ON” and a game state shifts to the return mode. In the return mode, the player can acquire a specific number (500 in the present embodiment) of coins, or credits equivalent thereto.  
      In other words, in the with-insurance mode, a game can be played in a state where an insurance is carried for compensating all or part of a loss arising in a case where no bonus game has arisen for a long time.  
      On the other hand, the without-insurance mode is selected when the command for selecting the with-insurance mode is not input. In a case where the without-insurance mode has been selected, the return mode flag is not set to the state of “ON” and a game state does not shift to the return mode even if no bonus game has a risen for a long time after the without-insurance mode is selected.  
      An image  91  showing “What is INSURANCE?” is displayed on the upward side of the image  90 . The image  91  is an image for inputting a command for displaying a help image. The player touches a predetermined part of the touch panel  69  corresponding to the display region of the image  91  so as to input the command for displaying the help image.  
      An image  92  showing “INSURANCE OFF” is displayed on the lower part of the upper image display panel  33 . The image  92  is an image showing that the current game mode is the without-insurance mode.  
      After the processing of step S 112 , the main CPU  41  determines whether or not the command for displaying the help image has been inputted (step S 113 ). The command for displaying the help image is inputted when the player touches the predetermined part of the touch panel  69  corresponding to the display region of the image  91 , as described above.  
      When the command for displaying the help image is inputted, a processing of displaying the help image is performed (step S 114 ). In this processing, the main CPU  41  transmits a depiction command of the help image to the graphic board  68 . The graphic board  68  performs the processing of displaying images on the upper image display panel  33  and the lower image display panel  16  based upon the above-mentioned depiction command. As a result, images as shown in  FIG. 12  are for example displayed on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 12  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the without-insurance mode.  
      The images on the upper image display panel  33  and the lower image display panel  16  are substantially the same as the images shown in  FIG. 11 . However, the images in  FIG. 12  are different from those in  FIG. 11  in that a help image  93  is displayed on the upper part of the upper image display panel  33 .  
      The help image  93  is an image showing “INSURANCE HELP MESSAGE, When bonus game trigger “APPLE” does not appear during MAXBET of 600 games, insurance of 500 credits is paid out”. The help image  93  shows a word description of the with-insurance mode. It should be noted that the help image  93  shown in  FIG. 12  disappears when a predetermined period of time (for example, ten seconds) lapses from the display thereof.  
      When the processing of step S 114  is performed, or when the command for displaying the help image is not inputted in step S 113 , the main CPU  41  determines whether or not the command for selecting the with-insurance mode has been inputted (step S 115 ). As described above, the command for selecting the with-insurance mode is inputted when the player touches the predetermined part of the touch panel  69  corresponding to the display region of the image  90 .  
      When the command for selecting the with-insurance mode is inputted, the main CPU  41  sets the insurance mode flag, stored in the RAM  43 , to “ON” (step S 116 ). Subsequently, the main CPU  41  performs the processing of subtracting a specific number of credits (in the present embodiment, the number of credits equivalent to one dollar) from the number of credits stored in the RAM  43  (step S 117 ).  
      Step S 117  corresponds to the processing, in which upon receipt of the predetermined signal from the touch panel  69  (input device) in the without-insurance mode, the main CPU  41  (processing device) accepts an insertion of credits, the number of which is required for the shifting the game mode from the without-insurance mode to the with-insurance mode.  
      In step S 111 , when the insurance mode flag is determined to have been set to “ON”, or the processing of step S 117  is performed, the processing of displaying the with-insurance mode is performed (step S 118 ).  
      In this processing, the main CPU  41  (processing device) transmits a depiction command of an image for the with-insurance mode to the graphic board  68 . On the graphic board  68 , the VDP extracts image data from the RAM  43  (storage device) to be developed in a video RAM, and produces one frame of image data to be outputted to the upper image display panel  33  and the lower image display panel  16 . As a result, images as shown in  FIG. 13  are for example displayed on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 13  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the with-insurance mode.  
      An image  90 ′ showing “INSURANCE BEING CONTINUED, TOUCH TO SEE HELP” is displayed on the right lower part of the lower image display panel  16  in place of the image  90  (see  FIG. 11 ). The image  90 ′ is an image showing that the current game mode is the with-insurance mode as well as an image for inputting the command for displaying the help image. The player can input the command for displaying the help image by touching the predetermined part of the touch panel  69  corresponding to the display region of the image  90 ′.  
      The image  90 ′ is an image corresponding to the display command input image.  
      An image  92 ′ showing“INSURANCE BEING CONTINUED, INSURANCE WIN 500 CREDITS” is displayed on the lower part of the upper image display panel  33 . The image  92 ′ is an image showing that the current game mode is the with-insurance mode, and that the number of credits to be given to the player when the game state is shifted to the return mode is 500.  
      After the processing of step S 118 , the main CPU  41  performs a game executing processing in the with-insurance mode (step S 119 ). While this processing is later described in detail using  FIG. 14 , in the with-insurance mode, the image  92 ′ is displayed on the upper image display panel  33  and the image  90 ′ is displayed on the lower image display panel  16 .  
      On the other hand, when the command for selecting the with-insurance mode is not inputted in step S 115 , the main CPU  41  performs a game executing process in the without-insurance mode (step S 120 ). This processing is substantially the same as the game executing processing in the with-insurance mode (see  FIG. 14 ), except that the processing according to the transition to the return mode and the processing according to counting of the number of games are not performed; hence description thereof is omitted herein. It should be noted that in the without-insurance mode, the image  92  is displayed on the upper image display panel  33 , and the images  90 ,  91  are displayed on the lower image display panel  16 . When the processing of step S 119  or S 120  is performed, the processing is then returned to step S 111 .  
      As explained by reference to FIGS.  10  to  13 , the present embodiment is designed such that in the without-insurance mode, the image  90  (the shift command input image) showing “INSURANCE BET $1.00 TOUCH TO BET” is displayed on the right lower part of the lower image display panel  16  (see  FIGS. 11 and 12 ). The player can input the command for selecting the with-insurance mode by touching the predetermined part of the touch panel  69  corresponding to the display region of the image  90 . On the other hand, in the with-insurance mode, the image  90 ′ showing “INSURANCE IN CONTINUATION TOUCH TO SEE HELP” (display command input image) is displayed on the same position as the position where the image  90  is displayed (see  FIG. 13 ). The player can input the command for calling for displaying the help image by touching the predetermined part of the touch panel  69  corresponding to the display region of the image  90 ′.  
      In other words, in the gaming machine  10 , the image  90  in the without-insurance mode and the image  90 ′ in the with-insurance mode are displayed at the same position of the lower image display panel  16 ; however, the image  90  and the image  90 ′ provide different functions in the game. As mentioned above, in the present invention, each of the images is displayed at a predetermined position on the display device (lower image display panel  16 ), and the functions of the images in the game are made different from each other depending on whether the game mode is in the without-insurance mode or in the with-insurance mode. With this arrangement, it becomes possible to effectively utilize the display space of the display device.  
       FIG. 14  is a flowchart showing a subroutine of a game execution processing in the with-insurance mode that is called and executed in step S 119  of the subroutine shown in  FIG. 10 .  
      In the game execution processing, the main CPU  41  at first determines whether or not a coin is BET (step S 10 ). In the processing, the main CPU  41  determines whether an input signal output from the  1 -BET switch  26 S or the maximum BET switch  27 S has been received or not when the 1-BET button  26  or the maximum BET button  27  is operated, respectively. If it is determined that a coin has not been BET, the process returns to step S 10 .  
      On the other hand, if it is determined in step S 10  that a coin is BET, the main CPU  41  conducts a processing for subtracting the number of credits stored in RAM  43  according to the number of BET coins (step S 11 ). In a case where the number of BET coins is more than the number of credits stored in RAM  43 , the process returns to step S 10  without conducting subtraction on the number of credits stored in RAM  43 . In a case where the number of BET coins exceeds the upper limit (50 coins in the present embodiment) up to which a BET is possible in one game, the processing advances to step S 12  without conducting a processing for subtracting the number of BET coins from the number of credits stored in RAM  43 .  
      Then, the main CPU  41  determines whether the spin button  23  has been turned ON or not (step S 12 ). In the processing, the main CPU  41  determines, when the spin button  23  is pressed, whether an input signal output from the spin switch  23 S has been received or not.  
      If it is determined that the spin button  23  has not been turned ON, the processing returns to step S 10 . Note that in a case where the spin button has not been turned ON (for example, in a case where a command of terminating a game has been input without turning ON the spin button  23 ), the main CPU  41  cancels a result of the subtracting processing in step S 11 .  
      In the present embodiment, description will be given of a case in which: after a coin is BET (step S 10 ), a processing for conducting subtraction on the number of credits (step S 11 ) is conducted prior to the determination on whether the spin button  23  has been turned ON or not (step S 12 ). However, the present invention is not limited to this example. For example, a processing for subtraction on the number of credits (step S 11 ) may be conducted after a coin is BET (step S 10 ), determined whether the spin button  23  has been turned ON or not (step S 12 ), and when determined that the spin button  23  has been turned ON (YES in step S 12 ).  
      Meanwhile, in step S 12  of  FIG. 14 , if it is determined that the spin button  23  has been turned ON therein, the main CPU  41  conducts a lottery processing (step S 13 ). In the lottery processing, the main CPU  41  (processing device) executes a lottery program stored in RAM  43  (storage device) to thereby determine a code No. of the stopped reels  14 . Thus, a combination of symbols stop displayed is determined. Detailed description of the processing will be given later by making reference to  FIGS. 15 and 16 . In the present embodiment, description will be given of a case where a combination of symbols stop displayed is determined, and one winning combination of plural winning combinations is determined thereafter. However, in the present invention, one winning combination selected from plural winning combinations may at first be determined by a lottery, and the combination of symbols to be stop displayed may be determined thereafter, based on the determined winning combination.  
      Then, the main CPU  41  conducts a reel rotating control processing (step S 14 ). The processing is a processing which, after all of the reels  14  starts to rotate, stops the rotating of each of the reels  14  such that a combination of symbol sequences corresponding to the winning combination determined in step S 13  is stop displayed on the winning line L. Detailed description of the processing will be given later by making reference to FIGS.  17  to  19 .  
      Then, the main CPU  41  determines whether a bonus game trigger has been established or not, that is whether “APPLE” is stop displayed in the display window  15  or not (step S 15 ) If it is determined that the bonus game trigger has been established, the main CPU  41  (processing device) reads a program for conducting a bonus game from RAM  43  (storage device) to execute a bonus game processing (step S 16 ). Here, the first special game state is generated. Detailed description of the bonus game processing will be given later by making reference to  FIG. 22 .  
      After the processing in step S 16 , it is determined whether or not the return mode flag has been set to “ON” (step S 25 ). Having been set to “ON”, the return mode flag is set to “OFF” (step S 26 ).  
      On the other hand, if it is determined in step S 15  that the bonus game trigger has not been established, the main CPU  41  determines whether a winning combination has been established or not (step S 17 ). If it is determined that a winning combination has been established, the main CPU  41  conducts payout of a coin corresponding to the number of coin-in and the winning combination (step S 18 ). In a case where coins are reserved, the main CPU  41  conducts a processing to add the coins to the number of credits stored in RAM  43 . On the other hand, in a case where payout of a coin is conducted, the main CPU  41  transmits a control signal to the hopper  66  and conducts payout of a predetermined number of coins. In that situation, the coin detecting section  67  counts the number of coins paid out from the hopper  66  and when the number of counts reaches a designated number, transmits a payout completion signal to the main CPU  41 . Thus, the main CPU  41  stops the driving of the hopper  66  to terminate the coin payout processing.  
      When it is determined that no winning combination has been established (that a winning combination has failed to be established) in step S 17 , or when the processing of step S 1 . 8  has been executed, the main CPU  41  determines whether the return mode flag stored in RAM  43  is set to the state “ON” or not (step S 19 ). If it is determined that the return mode flag has been set to the state “ON”, the main CPU  41  (processing device) reads from RAM  43  (storage device) a program for shifting a game state to the return mode, executes the return mode processing, to thus shift a game state to the return mode (step S 20 ). Here, the second special game state has been generated. Detailed description will be given of the return mode processing later using  FIG. 23 .  
      In step S 19  or S 25 , when determining that the return mode flag has not been set to “ON”, or performing the processing of step S 20  or S 26 , the main CPU  41  determines (step S 21 ) whether or not the bonus game has been executed (step S 16 ) or the game state has been shifted to the return mode (step S 20 ).  
      If it is determined that a bonus game has not been executed, or that a game state has not shifted to the return mode, the main CPU  41  executes a counting processing (step S 22 ).  
      The counting processing is a processing conducted between the gaming machine  10  and the control device  200 . The number of coin-in and the number of coin-out for one game together with the gaming machine identification number are transmitted from the gaming machine  10  to the control device  200 . In the control device  200 , the number of games, an accumulative number of coin-in, an accumulative number of coin-out and the like are updated with respect to each gaming machine identification number. When the number of games reaches a set value, the number of coin-out in the return mode is determined according to the set value, and a return command signal showing the set value and the number of coin-out is transmitted to the gaming machine  10  from the control device  200 . The main CPU  41 , when receiving the return command signal, sets the return mode flag to the state “ON”. Detailed description of the counting processing will be given later by making reference to  FIG. 25 .  
      On the other hand, when it is determined that the bonus game has been executed or the game state has been shifted to the return mode in step S 21 , the insurance mode flag is set to “OFF” (step S 23 ). When the processing of step S 22  or S 23  is performed, the present subroutine is completed.  
       FIG. 15  is a flowchart showing a subroutine of a lottery processing called and executed in step S 13  of the subroutine shown in  FIG. 14 . The processing is a processing conducted by executing a lottery program stored in RAM  43  with the main CPU  41 . The main CPU  41  executes a random number generating program included in the lottery program, and a random number value from the numerical value range of 0 to 255 is selected thereby such that each of the selected random number values correspond to each of the three reels  14  (step S 31 ). In the present embodiment, description will be given of a case where random numbers are generated on a program (a case where so-called software random numbers are used). In the present invention, however, a random number generator may be used, and random numbers may be extracted therefrom (so-called hardware random numbers may be used).  
      Then, the main CPU  41  (processing device) refers to symbol weighting determination data corresponding to payout rate setting data which is output from GAL  54  and stored in RAM  43  (storage device), and determines, based on the selected three random number values, code Nos. (see  FIG. 3 ) for each of the reels  14  (step S 32 ). The code Nos. of the reels  14  correspond to code Nos. of the symbols stop displayed on the winning line L. The main CPU  41  determines code Nos. of the reels  14  to thereby determine a winning combination. For example, in a case where code Nos. of the reels  14  are determined “00”, “00” and “00”, it means that the main CPU  41  determined a winning combination as “JACKPOT”. Based on the code Nos. determined for each of the reels, a reel rotating control processing which will be described later is conducted.  
      Here, description of a winning combination in the present embodiment will be given.  
       FIG. 16  is a figure describing a relationship among winning combinations of plural kinds, establishment possibility of each winning combination and the number of coin-out in the present embodiment. The establishment possibilities of each of the winning combinations shown in  FIG. 16  are of a case where a payout rate is set to 88% in a game other than a bonus game. The establishment possibilities shown in the figure show possibilities of the establishment of each of the shown winning combinations in such a case that code Nos. of each of the reels  14  are determined based on the selected three random number values by referring to a symbol weighting determination data. In other words, the random number values are not made to correspond to each of the winning combinations.  
      An establishment possibility of a bonus game trigger is 0.5%. If a player hits the bonus game trigger, three “APPLE” symbols are stop displayed on the winning line L and a bonus game is generated. In the bonus game, executed is a free game of which the number of games is determined by a lottery.  
      An establishment possibility of “JACKPOT  7 ” is 0.5%. If this winning combination has been established, three “JACKPOT 7” symbols are stop displayed on the winning line L, and 30 coins per one coin-in are paid out. The lower the establishment possibility of the winning combination is, the higher the number of coin-out is set. When a combination of symbols stop displayed is not hitting any of the winning combinations shown in  FIG. 16 , this is a failure, and there is no coin-out.  
       FIG. 17  is a flowchart showing a reel rotating control processing called and executed in step S 14  of the subroutine shown in  FIG. 14 . This processing is a processing conducted between the main CPU  41  and the sub CPU  61 .  
      The main CPU  41  transmits to the sub CPU  61  a start signal that starts the rotating of reels (step S 40 ). The sub CPU  61  conducts a reel rotating processing when it receives the start signal from the main CPU  41  (step S 51 ). In the processing, the sub CPU  61  supplies a pulse to the motor driving circuit  62 . The pulse output from the sub CPU  61  is amplified by the driver  64  and supplied to each of the stepping motors  70  ( 70 L,  70 C and  70 R). As a result, the stepping motors  70  rotate, there by making the reels  14  ( 14 L,  14 C and  14 R) to rotate. A stepping motor  70  is a 1-2 phase excitation type stepping motor which has a step angle of 0.9 degree and requires the number of steps of  400  for one rotation. Hence, if  400  pulses are supplied to the stepping motor  70 , the reels  14  rotate once.  
      When the reels  14  start to rotate, the sub CPU  61  supplies to the motor driving circuit  62  pulses at a lower frequency, and the pulse frequency is gradually raised. A rotational speed of the reels  14  is thereby increased. When a predetermined time elapses, the pulse frequency is controlled to be constant. As a result, the reels  14  rotate at a constant speed.  
      Here, description of a rotational operation of the reels  14  will be given, by using  FIG. 18 .  
       FIGS. 18A  to  18 D are side views for describing a rotating operation of a reel  14 .  
      As shown in  FIG. 18A , a semicircular metal plate  14   a  is attached to the side surface of a reel  14 . The metal plate  14   a  rotates together with the reel  14 . Twenty two symbols (see  FIG. 3 ) are depicted on the circumferential surface of the reel  14 . Three symbols of the twenty two symbols depicted on the circumferential surface of the reel  14  can be visually recognizable through the display window  15  formed in front of the reel  14 . The arrow mark of a heavy line in the figure indicates a rotating direction of the reel  14 . A proximity sensor  65   a  is provided on the side of the reel  14 . The proximity sensor  65   a  is used to detect the metal plate  14   a.  The proximity sensor  65   a  does not rotate nor move even if the reel  14  rotates. [ 0140 ]  
       FIG. 18A  shows a position of the meal plate  14   a  when the metal plate  14   a  starts being detected by the proximity sensor  65   a  (hereinafter also referred to as a position A). If the reel  14  rotates when the metal plate  14   a  is at the position A, the metal plate  14   a  moves to a position shown in  FIG. 18B .  FIG. 18B  shows a position of the metal plate  14   a  when the metal plate  14   a  is being detected by the proximity sensor  65   a  (hereinafter also referred to as a position B). If the reel  14  rotates when the metal plate  14   a  is at the position B, the metal plate  14   a  moves to a position shown in  FIG. 18C .  FIG. 18C  shows a position of the metal plate  14   a  when the metal plate  14   a  will no longer be detected by the proximity sensor  65   a  (hereinafter also referred to as a position C).  
      If the reel  14  rotates when the metal plate  14   a  is at the position C, the metal plate  14   a  moves to a position shown in  FIG. 18D .  FIG. 18D  shows a position of the metal plate  14   a  when the metal plate  14   a  is not detected by the proximity sensor  65   a  (hereinafter also referred to as a position D). If the reel  14  further rotates, a position of the metal plate  14   a  returns to the position A. As described above, together with the rotating of the reel  14 , the metal plate  14   a  changes its position in the order from the position A, to the position B, to the position C, to the position D, to the position A and so forth.  
      The proximity sensor  65   a  constitutes an index detecting circuit  65  (see  FIG. 3 ). When it is referred to as “High” at a state where the proximity sensor  65   a  detects the metal plate  14   a,  and as “Low” at a state where the proximity sensor  65   a  does not detect the metal plate  14   a,  a state of the index detecting circuit  65  is “High” during the period when the metal plate  14   a  moves from the position A to the position B and to the position C, and a state of the index detecting circuit  65  is “Low” during the period when the metal plate  14   a  moves from the position C to the position D and to the position A. The sub CPU  61  assigns a rise from “Low” to “High” as an index (origin)  1  and a fall from “High” to “Low” as an index (origin)  2  to thereby recognize the rotating position of the reel  14 .  
      The main CPU  40 , after transmitting in step  40  a start signal to the sub CPU  61 , executes representation to be executed while the reels are rotating (step S 41 ). The process is a processing which conducts display of an image on the lower image display panel  16  and output of sound from the speaker  29  over a period (for example, 3 seconds) determined according to a result and the like of the lottery processing (step S 13  in  FIG. 14 ).  
      Then, the main CPU  40  determines whether it is the timing at which a command is to be issued so as to stop the rotating of the reel  14 , or not (step S 42 ).  
      The timing at which a command is issued so as to stop rotation of a reel  14  is a timing before the time when the representation to be executed while the reels are rotating is terminated, which is an interval having the minimum time necessary for stopping the rotating of the reel  14 . Note that the minimum time necessary for stopping the rotating of the reel  14  is determined in advance.  
      If it is determined in step S 42  that it is not the timing at which the command to stop the rotating of the reel  14  is to be issued, the process returns to the processing in step S 42  and there presentation to be executed while the reels are rotating continues to be conducted. On the other hand, if it is determined in step S 42  that it is the timing at which the command to stop the rotating of the reel  14  is to be issued, the main CPU  41  transmits to the sub CPU  61  a code No. of the reel which is stored in RAM  43  (step S 43 ). When the sub CPU  61  receives a code No. of the reel from the main CPU  41 , the code No. is converted to a stopping position of the reel (the number of steps) from an index, based on a correspondence table between the number or steps and the code Nos. stored in ROM (not shown in the figure) included in the sub CPU  61  (step S 52 ).  
       FIG. 19  is a schematic diagram showing a correspondence table between the number of steps and the code No. Each of the code Nos. are related to an index and the number of steps.  
      Each code No. corresponds to the symbols depicted on the circumferential surfaces of the reels  14  (see  FIG. 3 ) and symbols of code Nos. “00” to “10” correspond to the index  1 . Moreover, symbols of code Nos. “11” to “21” correspond to the index  2 . The number of steps in the correspondence table shown in  FIG. 19  is the number of steps with the index  1  as a reference. For example, if a code No. is “08”, a stopping position of the reel is at 145 steps from the index  1 . If a code No. is “12”, a stopping position of the reel is at 218 steps from the index  1 .  
      Then, the sub CPU  61  executes a reel stopping processing (step S 53 ). In the processing, the sub CPU  61  detects a rise in the index detecting circuit  65  from “Low” to “High” (the index  1 ) on each of the reels  14 , and supplies to the motor driving circuit  65  pulses corresponding to the number of steps which were converted in step S 52  from a code No. at a timing at which the index  1  is detected, and supply of pulses is ceased thereafter.  
      For example, when, in step S 52 , the stopping positions of the reels are determined to be  145  steps from the index  1 , the sub CPU  61  supplies 145 pulses to the motor driving circuit  65  at a timing at which the index  1  is detected, and the supply of pulses is terminated thereafter. Furthermore, when, in step S 52 , the stopping positions of the reels are determined to be 218 steps from the index  1 , the sub CPU  61  supplies 218 pulses to the motor driving circuit  65  at a timing at which the index  1  is detected. As a result, the reels  14  stop at the code No. determined in step  32  of  FIG. 15  and the combination of symbols corresponding to the winning combination determined in step S 32  of  FIG. 15  is stop displayed on the winning line L. On the other hand, the main CPU  41  terminates the representation to be executed while the reels are rotating. After the processing in steps S 44  and S 53  are over, the present reel rotating control processing is completed.  
      Moreover, when an index corresponding to the code No. transmitted in step S 43  is different from an index detected by the index detecting circuit  65  when the rotating of the reels  14  stop, this means that an out-of-order state occurred on the reels  14 ; therefore, the main CPU  41  conducts a processing for displaying an error message on the lower image display panel  16  to temporarily stop a game.  
      For example, in a case where, even though a processing for stopping the reel  14 L was executed at the code No.  12  corresponding to the index  2 , the index  1  is detected by the index detecting circuit  65  when the rotating of the reel  14 L stops, the game is temporarily stopped.  
       FIG. 20  is a flowchart showing a help image display processing to be performed as an intervention process when the player touches a predetermined portion of the touch panel  69  corresponding to the display region of the image  90 ′ (see  FIG. 13 ) displayed on the lower image display panel  16  during execution of the subroutine shown in  FIG. 14 . This is a processing to be performed between the main CPU  41  of the gaming machine  10  and the CPU  201  of the control device  200 .  
      First, the main CPU  41  transmits an inquiry signal including a gaming machine identification number to the control device  200  through the communication line  101  by means of the communication interface  44  (step S 150 ).  
      On the other hand, upon receipt of the inquiry signal from the gaming machine  10  through the communication line  101  by means of the communication interface  204 , the CPU  201  of the control device  200  transmits a response signal to the gaming machine  10  through the communication line  101  by means of the communication interface  204 , the response signal indicating the number of games stored in the hard disc drive  205  corresponded to the gaming machine identification number which is included in the inquiry signal and the remaining number of games until the number of games reaches a set value (step S 160 ).  
      Upon receipt of the response signal from the control device  200  through the communication line  101  by means of the communication interface  44 , the main CPU  41  of the gaming machine  10  performs the processing of displaying a help image based upon the number of games and the remaining number of games which are indicated by the response signal (step S 151 ).  
      In this processing, the main CPU  41  stores in the RAM  43  the number of games and the remaining number of games which are indicated by the response signal. Subsequently, the main CPU  41  transmits a help image depiction command to the graphic board  68  based upon the number of games and the remaining number of games. The graphic board  68  performs the processing of displaying images on the upper image display panel  33  and the lower image display panel  16  based upon the depiction command.  
      As a result, images as shown in  FIG. 21  are for example displayed on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 21  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel in the with-insurance mode.  
      An image  95  showing an upward-pointing indicator and “Look Up” is displayed on the lower part of the lower image display panel  16 . The image  95  is an image intended to prompt the player to look at the upper image display panel  33 .  
      The help image  93  is displayed on the upper side of the upper image display panel  33 . The help image  93  is the same image as shown in  FIG. 12 . An image  94  showing “INSURANCE STATUS, Current number of games: 500 games, Remaining number of games: 100 games” is displayer on the lower side of the help image  93 . The image  94  is an image showing the number of games and the remaining number of games until the number of games reaches a set value. Namely, “Current number of games: 500 games” shows the number of games, while “Remaining number of games: 100 games” shows the remaining number.  
      It is to be noted that the images  94 ,  95  and the help image  93  which are shown in  FIG. 21  disappear when a predetermined period of time (for example, ten seconds) elapses from the display of those images.  
      After completion of the processing of step S 151 , the present processing is completed.  
      Step S 151  is a processing, in which upon receipt of the output requesting signal from the touch panel  69  (input device) (step S 150 ), the main CPU  41  (processing device) outputs to the an image or sound corresponding to the remaining number until the number of games reaches the set value to the upper image display panel  33 , the lower image display panel  16  and the speaker  29  (output device), based upon data for output stored in the RAM  43  (storage device).  
       FIG. 22  is a flowchart showing a subroutine of a bonus game processing called and executed in step S 16  of the subroutine shown in  FIG. 14 . In the bonus game processing, firstly, the main CPU  41  determines a number T of bonus games from  10  to  25  games, based on a random number value obtained by executing a random number generation program included in a lottery program stored in RAM  43  (step S 60 ). The main CPU  41  stores as data into RAM  43  the number of games of the determined bonus games.  
      Next, the main CPU  41  conducts a lottery processing (step S 61 ) and a reel rotating control processing (step S 63 ). The processing in step S 61  is a processing almost the same as the processing described using  FIG. 15 . The processing in step S 63  is a processing almost the same as the processing described using  FIG. 17 . Since descriptions of these processing have already been given, descriptions thereof are omitted herein.  
      Then, the main CPU  41  determines whether a bonus game trigger has been established or not, that is, whether three “APPLE” are stop displayed in the display windows  15  or not (step S 64 ). If it is determined that the bonus game trigger has been established, the number t of additional games of the bonus game is determined in a lottery (step S 65 ) and the determined number t of additional games is added to the number T of games of the bonus game (step S 66 ). Thus, when a bonus game is hit during the bonus game, a remaining number of bonus games increases. More specifically, for example, in a case where a game state shifts to 20 bonus games for the first time, and hits 17 bonus games upon conducting 12 of the bonus games, another 25 bonus games (20 bonus games—12 bonus games+17 bonus games) are to be conducted.  
      If a bonus game trigger has not been established, the main CPU  41  determines whether a winning combination has been established or not (step S 67 ). If it is determined that the winning combination has been established, the main CPU  41  conducts payout of coins corresponding to the number of coin-in and the winning combination (step S 68 ). Since the processing is similar to the processing in step S 18  and description thereof has already been given, the description of the present processing is omitted herein.  
      In a case where the processing in step S 66  or S 68  has been executed, or if it is determined in step S 67  that any winning combination has not been established (if it is determined that a failure has occurred), the main CPU  41  reads the number T of bonus games stored in RAM  43 , and one bonus game is subtracted from the read number T of bonus games. The number T of bonus games after the subtraction is again stored into RAM  43  (step S 69 ).  
      Then, the main CPU  41  determines whether the number T of bonus games reaches the number of games determined in step S 60  or not (step S 70 ). More specifically, it is determined whether the number T of games stored in RAM  43  has become 0 or not, and if the number T of games is not 0, that is, if it is determined that the number of bonus games played does not reach the number of games which were determined in step S 60 , the process returns to step S 61  and the above-mentioned processing is repeated. On the other hand, if the number T of games is 0, that is, if it is determined that the number T of games has reached the number of games which were determined in step S 60 , a number-of-games reset signal is transmitted to the control device  200  (step S 71 ), and the present subroutine is completed thereafter. The number-of-games reset signal includes the gaming machine identification information of the gaming machine  10 , and CPU  201  of the control device  200 , when receiving the number-of-games reset signal, resets to 0 the number of games of which is stored in the hard disc drive  205  by being made to correspond to the gaming machine identification information included in the number-of-games reset signal.  
       FIG. 23  is a flowchart showing a subroutine of a return mode processing called and executed in step S 20  of the subroutine shown in  FIG. 14 .  
      First, the main CPU  41  extracts from the image data stored in the RAM  43  an image data for notifying the shift to the return mode, and performs the processing of displaying the image on the lower image display panel  16  based upon the image data (step S 80 ). Image data for notifying the transition to the return mode is read from the memory card  53  and included in a game program stored into RAM  43 .  
      The main CPU  41  transmits to the graphic board  68  depiction command of an image for notifying transition to the return mode. On the graphic board  68 , based upon the depiction command, the VDP extracts image data from the RAM  43  to be developed in a video RAM, and produces one frame of image data to be outputted to the upper image display panel  33  and the lower image display panel  16 . As a result, images as shown in  FIG. 24  are displayed for example on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 24  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel during transition to the return mode (during generation of the second special game state).  
      An image  96  showing “WINNER 500 CREDITS” is displayed on the upper image display panel  33 . Further, a representation image  97  is displayed on a lower part of the lower image display panel  16 . The representation image  97  is an image showing a message “INSURANCE BECOMES DUE” and a goddess who pays out coins.  
      Next, the main CPU  41  extracts from sound data stored in the RAM  43  sound data for notifying transition to the return mode, and performs the processing of outputting sound from the speaker  29  based upon the extracted sound data (step S 81 ). The sound data for notifying transition to the return mode is included in the game program read from the memory card  53  and stored in the RAM  43 .  
      The main CPU  41  extracts sound data for notifying transition to the return mode, converts the sound data into a sound signal, and supplies the speaker  29  with the converted sound signal. As a result, the sound for notifying transition to the return mode is output from the speaker  29 .  
      Next, the main CPU  41  performs the processing of paying out a specific number of coins, or the processing of adding a specific number of credits (step S 82 ).  
      In the case of performing the processing of adding a specific number of credits, the main CPU  41  performs the processing of adding a specific number (500 in the present embodiment) of credits stored in the RAM  43 . On the other hand, in the case of paying out the coin, the main CPU  41  transmits a control signal to the hopper  66 , to pay out a specific number (500 in the present embodiment) of coins. At this time, the coin detecting section  67  counts the number of coin-outs from the hopper  66 , and when the count reaches a designated number, transmits a payout completion signal to the main CPU  41 . The main CPU  41  thereby stops drive of the hopper  66 , to complete the coin-out processing.  
      It is to be noted that the ticket  39  with a bar code may be issued in step S 82 . In such a case, the main CPU  41  supplies the ticket printer  35  with data such as a specific number of credits (500 credits in the present embodiment), a date, time, an identification number of the gaming machine  10  and of the like data, and the ticket printer  35  issues the ticket  39  with a bar code based upon the above-mentioned data.  
      After the processing of step S 82 , the main CPU  41  sets the return mode flag to “OFF” (step S 83 ) to complete the present subroutine.  
       FIG. 25  is a flowchart showing a counting processing to be called and performed in step S 22  of the subroutine shown in  FIG. 14 .  
      This is a processing to be performed between the main CPU  41  of the gaming machine  10  and the CPU  201  of the control device  200 .  
      To begin with, the main CPU  41  transmits by the communication interface  44  the number of coin-in and the number of coin-out stored in RAM  43  together with the gaming machine identification number to the control device  200  through the communication line  101  (step S 90 ). The number of coin-in and the number of coin-out transmitted to the control device  200  from the gaming machine  10  are those of the game concerned.  
      The processing in step S 90  is a processing in which the main CPU  41  (processing device) transmits the identification information of the gaming machine  10  stored in the RAM  43  (storage device) to the control device  200  through the communication line  101 , each time a game is played.  
      On the other hand, the CPU  201  of the control device  200 , when receiving from the gaming machine  10  the number of coin-in, the number of coin-out and the gaming machine identification number through the communication line  101  by the communication interface  204 , updates the number of games, the accumulative number of coin-in and the accumulative number of coin-out corresponding to the received gaming machine identification number (step S 100 ), by choosing the data, which are made to correspond to each of the gaming machine identification numbers, of the number of games, the accumulative number of coin-in, the accumulative number of coin-out stored in the hard disc drive  205  (see  FIG. 6 ).  
      Next, the CPU  201  determines whether or not the updated number of games is not smaller than a set value for preliminary announcement (step S 140 ). The set value for preliminary announcement is a value ( 570  in the present embodiment) smaller than the set value, and previously stored as data in the hard disc drive  205 .  
      In step S 140 , when determining that the updated number of games is not smaller than the set value for preliminary announcement, the CPU  201  transmits to the gaming machine  10  through the communication line by means of the communication interface  204 , a command signal for preliminary announcement indicating the remaining number until the number of games reaches a set value (step S 141 ).  
      Upon receipt of the command signal for preliminary announcement transmitted from the control device  200  in step S 141 , the main CPU  41  of the gaming machine  10  extracts from the image data stored in the RAM  43  image data according to the above-mentioned remaining number. Based upon the extracted image data, the main CPU  41  then performs the processing of displaying an image according to the remaining number on the upper image display panel  33  and the lower image display panel  16 , to provide preliminary announcement that the game state will be shifted to the return mode after the displayed remaining number of games are played (step S 132 ). The image data for providing preliminary announcement of transition to the return mode is included in the game program read from the memory card  53  and stored in the RAM  43 . This game program includes, as image data for providing preliminary announcement of transition to the return mode, a plurality of kinds of image data corresponded to the remaining number.  
      The main CPU  41  determines images to be displayed on the upper image display panel  33  and the lower image display panel  16  based upon the remaining number. The main CPU  41  then transmits to the graphic board  68  a depiction command based upon the determination result. On the graphic board  68 , the VDP extracts image data according to the remaining number from the RAM  43  to be developed in a video RAM based upon the depiction command, and produces one frame of image data to be outputted to the upper image display panel  33  and the lower image display panel  16 . As a result, an image as shown in  FIGS. 26 and 27  is for example displayed on the upper image display panel  33  and the lower image display panel  16 .  
       FIG. 26  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel when  30  games are left to be played until the game state shifts to the return mode.  
      The upper image display panel  33  displays a representation image  98  along with the image  92 ′ (see  FIG. 13 ). The representation image  98  is an image showing that  30  games are left to be played until the game state shifts to the return mode, and displayed on the whole area of the upper image display panel  33  except for the image  92 ′.  
      Also on the lower image display panel  16  displayed is an image  99  showing that  30  games are left to be played until the game state is shifted to the return mode.  
       FIG. 27  is a figure showing one example of images displayed on the upper image display panel and the lower image display panel when five games are left to be played until the game state shifts to the return mode.  
      The upper image display panel  33  displays a representation image  98 ′ along with the image  92 ′ (see  FIG. 13 ). The representation image  98 ′ is an image showing that five games are left to be played until the game state shifts to the return mode, and displayed on the whole area, except for the area corresponding to the image  92 ′, of the upper image display panel  33 . Also on the lower image display panel  16  displayed is an image  99 ′ showing that five games are left to be played until the game state shifts to the return mode. As shown in  FIGS. 26 and 27 , display of the remaining number of games (remaining number) until the transition to the return mode allows providing to the player preliminary announcement that the game state will be shifted to the return mode in the near future. Hence, it is possible to prevent the player having consumed a large number of game media from losing interest in or concern on the game, and stopping the game.  
      Next, the main CPU  41  extracts sound data according to the remaining number from sound data stored in the RAM  43 , and performs the processing of outputting sound from the speaker  29  based upon the extracted sound data to provide by sound preliminary announcement that the game state will be shifted to the return mode after the displayed remaining number of games are played (step S 133 ). The sound data for providing preliminary announcement of transition to the return mode is included in the game program read from the memory card  53  and stored in the RAM  43 . This game program includes, as sound data for providing preliminary announcement of transition to the return mode, a plurality of kinds of image data corresponded to the remaining number.  
      The main CPU  41  determines sound to be outputted from the speaker  29  based upon the remaining number. The main CPU  41  extracts sound data from the RAM  43  based upon the determination result, and converts the sound data to a sound signal to be supplied to the speaker  29 . As a result, the sound for providing preliminary announcement that the game state will be shifted to the return mode after the displayed remaining number of games are played is output from the speaker  29 .  
      On the other hand, after performing the processing of step S 141 , the CPU  201  of the control device determines whether or not the updated number of games has reached a set value (step S 101 ). When determining that the updated number of games has reached the set value, the CPU  201  transmits a return command signal to the gaming machine  10  through the communication line  101  by means of the communication interface  204  (step S 103 ). The CPU  201  thereafter sets to zero the number of games stored in the hard disc drive  205  corresponded to the gaming machine identification number of the gaming machine  10  (step S 104 ).  
      The main CPU  41  of the gaming machine  10 , when receiving the return command signal transmitted from the control device  200  in step S 103 , sets the return mode flag to the state “ON” (step S 91 ). Thereafter, the present processing is terminated.  
      In the present embodiment, description has been given of a case where a game state shifts to the return mode when the number of games reaches a set value (see  FIG. 25 ). The present invention is, however, not limited to this example. For example, in a case where the number of inserted game media for a game played by the player is at the upper limit value that can be accepted in one game when the number of games reaches the set value, the second special game state may be generated (the game state shifts to the return mode). This is because in such a case, a player can be urged to insert game media up to the upper limit and a facility such as a casino and the like can increase a profit.  
      Moreover, in a case where the second special game state is generated when the number of inserted game media is at the upper limit value, the second special game state maybe generated not when the number of games reaches the set value, but when the number of inserted game media is at the upper limit value for a game played by a player when the number of games in which insertion of game media is conducted to the upper limit value reaches a set value. In such a case, it can be prevented from a small number of game media to be inserted in a game, thereby leading to a fact that the second special game state is generated by the spending of only a small number of game media in total.  
      As thus described, the gaming machine  10  according to the present embodiment is a gaming machine which comprises the main CPU  41  (processing device), the RAM  43  (storage device), and the upper image display panel  33  and the lower image display panel  16 ; and connected with a control device which accumulatively counts the number of games played at each of a plurality of gaming machines  10 , through a communication line, wherein the main CPU  41  performs: a processing of executing a lottery program stored in the RAM  43  to determine one winning combination selected from a plurality of winning combinations determined in advance (see  FIG. 15 ); a processing of reading from the RAM  43  a program for generating a bonus game (first special game state) when the determined winning combination is a special winning combination, “bonus game trigger”, and then executing the program (see  FIG. 22 ); a processing of reading from the RAM  43  a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of credits have been inserted, and then executing the program (see  FIG. 10 ); a processing of transmitting identification information of the gaming machine  10  stored in the RAM  43  to the control device  200  through the communication line  101  every time a game is played after the game mode has been shifted to the with-insurance mode (step S 90  in  FIG. 25 ); a processing of receiving a return command signal transmitted from the control device  200  when the number of games accumulatively counted with the control device  200  based upon the identification information of the gaming machine  10  reaches a set value (step S 91  in  FIG. 25 ); a processing of reading from the RAM  43  a program for shifting the game state to the return mode (generating a second special game state) based upon the command signal, and then executing the program (see  FIG. 23 ); a processing of receiving an output requesting signal output from the touch panel  69  (input device) when the player operates the touch panel  69  (see  FIG. 20 ); and a processing of displaying to the upper image display panel  33 , based upon data for output stored in the RAM  43 , the image  94  corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the touch panel  69  in the with-insurance mode (see step S 151 , in  FIG. 20 ).  
      According to the gaming machine  10 , the game mode is shifted from the without-insurance mode to the with-insurance mode on condition that a specific number of coins (credits) have been inserted. The game state is then shifted to the return mode upon receipt of the command signal transmitted from the control device  200  when the number of games counted in the control device  200  after the game mode has been shifted to the with-insurance mode, reaches the set value. Further, based upon data for output, the image  94  corresponding to the remaining number until the number of games reaches the set value is output to the upper image display panel  33  when the player operates the tough panel  69  in the with-insurance mode. It is therefore possible to prevent the player having consumed a large number of coins from raising discomfort or distrust toward the game and from losing interest in or concern on the game.  
      A gaming machine  10  according to the present embodiment is connected to the control device  200  through the communication line  101  and the control device  200  conducts counting of the number of games in the gaming machine  10  and determines whether the game state is to be shifted to the return mode or not (whether the second special game state is to be generated or not). The gaming machine  10  is not required to use a network and may be standalone.  
      The stand alone gaming machine  10  according to the present invention may include a gaming machine  10  comprising the main CPU  41  (processing device), the RAM  43  (storage device), and the upper image display panel  33  and the lower image display panel  16  (output device), wherein the main CPU  41  performs: a processing of executing a lottery program stored in the RAM  43  to determine one winning combination selected from a plurality of winning combinations determined in advance; a processing of reading from the RAM  43  a program for generating a bonus game (first special game state) when the determined winning combination is a special winning combination, “bonus game trigger”, and then executing the program; a processing of reading from the RAM  43  a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of coins (credits) have been inserted, and then executing the program; a processing of accumulatively counting the number of games every time a game is played after the game mode has been shifted to the with-insurance mode; a processing of determining whether or not the number of games has reached a set value; a processing of reading from the RAM  43  a program for shifting the game state to the return mode (generating a second special game state) when the number of games is determined to have reached the set value, and then executing the program; a processing receiving an output requesting signal output from the touch panel  69  (input device) when the player operates the touch panel  69 ; and a processing displaying to the upper image display panel  33 , based upon data for output stored in the RAM  43 , an image corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the touch panel  69  in the with-insurance mode.  
      While the gaming machine  10  according to the present embodiment shifts to the return mode (the second special game state is generated) when the number of games reaches a set value, the present invention is not limited to this example.  
      A gaming machine  10  of the present invention may shift to the return mode (generate the second special game state) when a payment balance in terms of coins is equal to or less than a set value.  
      Examples of the above-mentioned gaming machine  10  may include a gaming machine which comprises the main CPU  41  (processing device), the RAM  43  (storage device), and the upper image display pane  133  and the lower image display panel  16  (output device); and connected through a communication line with a control device which accumulatively counts a payment balance in terms of coins at each of a plurality of gaming machines  10 , wherein the main CPU  41  performs: a processing of executing a lottery program stored in the RAM  43  to determine one winning combination selected from a plurality of winning combinations determined in advance; a processing of reading from the RAM  43  a program for generating a bonus game (first special game state) when the determined winning combination is a special winning combination, “bonus game trigger”, and then executing the program; a processing of reading from the RAM  43  a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of credits have been inserted, and then executing the program; a processing of transmitting through the communication line  101  to the control device the numbers of coin-ins and coin-outs in the current game along with identification information of the gaming machine  10 , which are stored in the RAM  43 ; a processing of receiving a return command signal transmitted from the control device  200  when the payment balance in terms of the coins, accumulatively counted with the control device  200  based upon the identification information of the gaming machine  10 , becomes equal to or less than a set value; a processing of reading from RAM  43  a program for shifting the game state to the return mode (generating a second special game state) based upon the command signal, and then executing the program; a processing receiving an output requesting signal output from the touch panel  69  (input device) when the player operates the touch panel  69 ; and a processing displaying to the upper image display panel  33 , based upon data for output stored in the RAM  43 , an image corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the touch panel  69  in the with-insurance mode.  
      According to the gaming machine  10  as described above, the game mode is shifted from a without-insurance mode to a with-insurance mode on condition that a specific number of coins (credits) have inserted. The game state is then shifted to a return mode upon receipt of a command signal transmitted from the control device  200  when the payment balance in terms of the coins, counted with the control device  200  after the shift to the with-insurance mode, becomes equal to or less than a set value. Further, based upon the data for output, an image corresponding to the remaining number until the payment balance in terms of coins reaches the set value is output to the upper image display panel  33  when the player operates the touch panel  69  in the with-insurance mode. It is therefore possible to prevent the player having consumed a large number of coins from raising discomfort or distrust toward the game and from losing interest in or concern on the game.  
      The gaming machine  10  is connected through the communication line  101  to the control device  200  and the control device  200  counts payment balance in terms of coins in the gaming machine  10 , and determines whether a game state is to be shifted to the return mode or not (whether the second special game state is to be generated or not). The gaming machine  10  is, however, not necessarily required to be those using a network and may be standalone.  
      Examples of the above-mentioned gaming machine  10  may include a gaming machine  10  comprising them a in CPU  41  (processing device), the RAM  43  (storage device), and the upper image display panel  33  and the lower image display panel  16  (output device), wherein the main CPU  41  performs: a processing of executing a lottery program stored in the RAM  43  to determine one winning combination selected from a plurality of winning combinations determined in advance; a processing of reading from the RAM  43  a program for generating a bonus game (first special game state) when the determined winning combination is a special winning combination, “bonus game trigger”, and then executing the program; a processing of reading from the RAM  43  a program for shifting the game mode from a without-insurance mode to a with-insurance mode on condition that a specific number of credits have been inserted, and then executing the program; a processing of accumulatively counting a payment balance in terms of the coins every time a game is played after the game mode has been shifted to the with-insurance mode; a processing of determining whether or not the payment balance in terms of the coins is equal to or less than a set value; a processing of reading from the RAM  43  a program for shifting the game state to the return mode (generating a second special game state) when the payment balance in terms of coins is determined to be equal to or less than the set value, and then executing the program; a processing receiving an output requesting signal output from the touch panel  69  (input device) when the player operates the touch panel  69 ; and a processing displaying to the upper image display panel  33 , based upon data for output stored in the RAM  43 , an image corresponding to the remaining number until the number of games reaches the set value, upon receipt of the output requesting signal from the touch panel  69  in the with-insurance mode.  
      In the present embodiment, the case of accumulatively counting the number of games in each gaming machine corresponded to the gaming machine identification information was described. However, the present invention is not limited to this example. In the present invention, for example, player identification information may be added with respect to each player, and predetermined variables (for example, the number of games, a payment balance in terms of game media) for each player, corresponded to the player identification information, may be accumulatively counted. In such a case, inputting the player identification information is requested at start of the game or at transition to the with-insurance mode, and a processing of returning to zero, at input of the player identification information, predetermined valuables having been counted to that point.  
      In such a case, since a return can be paid with greater certainty to the player having consumed a large number of game media, it is possible to further raise interest in or concern on the game of the player.  
      In the present embodiment, description has been given of a case where a game state shifts to the return mode when the return mode flag has been set to the state “ON”, without other conditions being established thereafter. The present invention is, however, not limited to this example and, for example, a game state may shift to the return mode when a predetermined condition has been met after the return mode flag is set to the state “ON”. In such a case, the predetermined condition for transition to the return mode is not particularly limited, and may include, for example, establishment of a bonus game trigger, stop display of a predetermined combination of symbols, and of the like conditions.  
      In the present embodiment, description has been given of a case where a game state shifts to the return mode when the return mode flag is set to the state “ON”, regardless of the combination of symbols stop displayed thereafter. However, the present invention is not limited to this example. For example, a combination of symbols corresponding to the transition to the return mode may be set in advance and a game state may shift to the return mode after the symbols are stop displayed in that combination of symbols.  
      In the present embodiment, description has been given of a case where symbols are stop displayed (step S 14  in  FIG. 14 ), a processing is conducted based on the stop displayed combination of symbols (steps S 15  to S 20  in  FIG. 14 ), and the number of games is counted (step S 22  in  FIG. 14 ) thereafter. In the present invention, however, no specific limitation is placed on a timing at which counting of the number of games is conducted. For example, the timing may be a timing at which BET of a coin is conducted (after step S 10  or S 11  in  FIG. 14 ) or a timing at which the spin button is turned ON (after step S 12  in  FIG. 14 ). The number of games may be counted at a predetermined timing that is in the period from the time when display of a change in symbol is started, to the time when symbol sequences are stop displayed, and a processing based on the stop displayed combination of symbols has been conducted (for example, a timing at which symbol sequences are stop displayed). Note that a timing at which a payment balance in terms of game media can be the same as described above.  
      In the present invention, in a case where a special winning combination has been established in the period from the time when the number of games reaches a set value, to the time when the second special game state is generated, only the second special game state may be generated, or alternatively, either the first special game state or the second special game state may be generated depending on a game situation and the like.  
      An embodiment similar to the above-mentioned embodiment can also be adopted in a case where the second special game state is generated according to a payment balance in terms of game media. In other words, in a case where a special winning combination has been established in the period from the time when a payment balance in terms of game media is equal to or less than a set value, to the time when the second special game state is generated, only the first special game state may be generated, only the second special game state may be generated, or either the first special game state or the second special game state may be generated depending on a game situation and the like.  
      Although this will be a repetition, in the return mode as the second special game state, a return situation to a player may be simply as such that a predetermined number of game media is paid out when the number of games reaches a set value. It may alternatively be a situation that when the number of games reaches a set value, the return mode as the second special game state, allowing a player to have a privilege in a similar manner to the first special game state such as a free game, a second game, a mystery game and the like, can be set, and a predetermined number of game media is paid out by one of the above-mentioned game mode.  
      In the aforementioned embodiment, both embodiments are exemplified. Both embodiments correspond to the second special game state in the present invention.  
      A timing at which a predetermined number of game media is paid out is not limited to such a timing at which one game is completed and symbol sequences are stop displayed as in the mystery game described above, and for example, game media may be immediately paid out when the number of games reaches a set value.  
      Moreover, a method for paying out a predetermined number of game media is also not particularly limited, and for example, coins may be actually paid out, the number of credits may be increased, or a ticket such as a ticket with a bar code may be issued.  
      However, in order to be able to discriminate and recognize whether a player is paid out by an ordinary game or a bonus game (the first special game state), or by the return mode (the second special game state), it is necessary to perform the following way. That is, in a case where coins are actually paid out in mystery bonus of the return mode (the second special game state), the timing for payout is required to be different from those of an ordinary game and bonus game (the first special game state). Moreover, it is required that payout in an ordinary game and a bonus game (the first special game state) is performed with actual coins and payout in the return mode (the second special game state) is performed with a ticket described above. With such an embodiment adopted, payout in an ordinary game and a bonus game (the first special game state), and payout in the return mode (the second special game state) can be discriminated from each other.  
      Although 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. Besides, the effects described in the embodiment of the present invention are only the most preferable effects generated from the present invention and effects to be caused by the present invention is not limited to those described in the embodiment of the present invention.