AU2007202727B2

AU2007202727B2 - Slot machine and control method of game

Info

Publication number: AU2007202727B2
Application number: AU2007202727A
Authority: AU
Inventors: Kazuo Okada
Original assignee: Universal Entertainment Corp
Current assignee: Universal Entertainment Corp
Priority date: 2007-03-20
Filing date: 2007-06-13
Publication date: 2012-08-09
Anticipated expiration: 2027-06-13
Also published as: JP2008229034A; JP5390074B2; KR20080085633A; SG146505A1; AU2007202727C1; ZA200704848B; AU2007202727A1

Abstract

A slot machine of the present invention comprises: a symbol display device capable of variably displaying a plurality of 5 symbols; and a controller, the controller programmed to execute the processing of: (A) executing a game in which the plurality of symbols are variably displayed and then stop-displayed to the symbol display device after game media are BET in number equal to or less than a previously set maximum number of BETs, 10 and game media are paid out in number according to the stop-displayed symbols or a combination thereof; (B) shifting a mode from a non- insurance mode to an insurance mode on condition that a predetermined number of game media is inserted; (C) counting the number of games played after shifting to the 15 insurance mode, in the insurance mode; (D) paying out a predetermined number of game media when the number of games counted in the processing (C) reaches a specific number; and (E) clearing the number of games counted in the processing (C), when a game is played in which game media are paid out in number 20 equal to or more than a predetermined number before the number of games counted in the processing (C) reaches the specific number. Fig. 2 51- C PU Lap30 - - -- 61 5 5 - I index Position-chang 53S detecting detect ing circuit circuit 534 Memory card -- 65 71 54S C 70L 70 70R 14L 14C 14R Driver 64 -- + FPGA63 20 C Motor driving circuit -- 62 23S Spin switch -- Hopper "66 cn Coin detecting portion '67 24S-- Change sw i tch 25S- CASHOUT switch -Upper image 3 display panel 26S- 1-BET switch ba , Lowe "image, 27S Maximum BET switch panel 21S eerter Speaker 29 21C Cinounter Touch panel 69 81 Cold cathode tubeBlvit 22 80 - - - - - - - - - - - Ticket printer 35 45 Pwersuply nitCard reader 36 Key switch 38S 44 Communication interface Data display 37

Description

AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION NAME OF APPLICANT(S):: Aruze Corp. ADDRESS FOR SERVICE: DAVIES COLLISON CAVE Patent Attorneys 1 Nicholson Street, Melbourne, 3000, Australia INVENTION TITLE: Slot machine and control method of game The following statement is a full description of this invention, including the best method of performing it known to me/us: 5102 C: RPrtb\-CC\J5U\d346362_1.Doc-5/23/2012 - la [0001] This application claims benefit of priority based on Japanese Patent No. 2007-073521 filed on March 20, 2007. 5 FIELD [0002] The present invention relates to a slot machine and control method of game. 10 BACKGROUND [0003] Conventionally, in a facility where a slot machine or the like is installed, a variety of game media such as coins or cash are inserted into the slot machine to play a game. 15 Each slot machine is configured to conduct a payout according to a winning state (game result) occurring along with progression of games. [0004] In a casino where a plurality of slot machines are 20 installed, a so-called "jackpot" is adopted where part of credits consumed in each slot machine is reserved and when the reserved amount reaches a certain amount, an amount too large to be paid out according to normal winning is paid out. In such a slot machine, in the normal case, each 25 winning occurs with its set probability, and the player carries on a game with expectation that the winning will occur. The Jackpot winning occurs on any of the slot machines at certain timing according to a determination different from the normal winning determination based on the 30 probability set in each slot machine. SUMMARY [0007] The present invention provides the following. 35 (1) A slot machine comprising: a symbol display device capable of variably displaying a plurality of symbols; and a controller. The controller is programmed to execute the processing 40 of: (A) executing a game in which the plurality of symbols are variably displayed and then stop-displayed to the symbol display device after game media are BET in number equal to or less than a previously set maximum number of BETs, and 45 game media are paid out in number according to the stop displayed symbols or a combination thereof; (B) shifting a mode from a non-insurance mode to an insurance mode on condition that a predetermined number of C:tVMSorbLb\DCC\J.'\4346362_1 10O-5/23/2012 -2 game media is inserted; (C) counting a number of games played after shifting to the insurance mode, in the insurance mode; (D) paying out a predetermined number of game media 5 when the number of games counted in the processing (C) reaches a specific number; and (E) clearing the number of games counted in the processing (C), when a game is played in which game media are paid out in number equal to or more than a predetermined 10 number before the number of games counted in the processing (C) reaches the specific number, wherein said processing (C) includes counting the number of games in which game media are BET in 15 number equal to said maximum number of BETs after shifting to said insurance mode, in said insurance mode. [0008] The present invention further provides the following. (2) The slot machine according to the above-mentioned 20 (1), wherein the processing (E) further comprises the processing of: clearing the number of games counted in the processing (C) and also shifting the mode from the insurance mode to 25 the non-insurance mode when a game is played in which game media are paid out in number equal to or more than a predetermined number before the number of games counted in the processing (C) reaches the specific number. [0010] 30 The present invention further provides the following. (3) A game control method comprising the steps of: (A) executing a game in which a plurality of symbols are variably displayed and then stop-displayed to a symbol display device capable of variably displaying a plurality of 35 symbols after game media are BET in number equal to or less than a previously set maximum number of BETs, and game media are paid out in number according to the stop-displayed symbols or a combination thereof; (B) shifting a mode from a non-insurance mode to an 40 insurance mode on condition that a predetermined number of game media is inserted; (C) counting a number of games played after shifting to the insurance mode, in the insurance mode; (D) paying out a predetermined number of game media 45 when the number of games counted in the step (C) reaches a specific number; and (E) clearing the number of games counted in the step (C) when a game is played in which game media are paid out C:\iMporb1\0cc\Jt.H\4346362_1.DOC-S/23/2012 -3 in number equal to or more than a predetermined number before the number of games counted in the step (C) reaches the specific number, wherein 5 said processing (C) includes counting the number of games in which game media are BET in number equal to said maximum number of BETs after shifting to said insurance mode, in said insurance mode. 10 BRIEF DESCRIPTIONS OF DRAWINGS Preferred embodiments of the present invention are hereafter described, by way of non-limiting example only, with reference to the accompanying drawings, in which: 15 Fig. 1 is a perspective view schematically showing a slot machine according to one embodiment of the present invention. Fig. 2 is a block diagram showing the internal configuration of the slot machine shown in Fig. 1. 20 Fig. 3 is a view for explaining a payout table in the present embodiment. Fig. 4 is a view showing exemplary images displayed to the slot machine shown in Fig. 1. Fig. 5 is another view showing exemplary images 25 displayed to the slot machine shown in Fig. 1. Fig. 6 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. Fig. 7 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. 30 Fig. 8 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. Fig. 9 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. Fig. 10 is another view showing exemplary images 35 displayed to the slot machine shown in Fig. 1. Fig. 11 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. Fig. 12 is another view showing exemplary images displayed to the slot machine shown in Fig. 1. 40 Fig. 13 is a flowchart showing main processing executed in the slot machine shown in Fig. 1. Fig. 14 is a flowchart showing a subroutine of insurance setting processing. Fig. 15 is a flowchart showing a subroutine of game 45 execution processing A (non-insurance mode). Fig. 16 is a flowchart showing a subroutine of game execution processing B (insurance mode/before reaching of notice set value).

C:\NRPorthbl\DCC\JLU\4346362_1 OC-5/23/2012 -4 Fig. 17 is a flowchart showing a subroutine of game execution processing C (insurance mode/after reaching of notice set value). Fig. 18 is a flowchart showing a subroutine of game 5 execution processing D (insurance mode/at reaching of a specific number). Fig. 19 is a chart showing a procedure of activation processing conducted by the mother board and the gaming board shown in Fig. 2. 10 Fig. 20 is a flowchart showing a subroutine of to-be stopped symbol determination processing. Fig. 21 is a flowchart showing a subroutine of reel rotation control processing. Figs. 22A to 22D are side views for explaining the reel 15 rotating operation. Fig. 23 is a schematic view showing a correspondence table of the number of steps and code No. Fig. 24 is a schematic view showing an entire configuration of a game system according to one embodiment 20 of the present invention. Fig. 25 is a perspective view schematically showing a slot machine according to another embodiment of the present invention. 25 DETAILED DESCRIPTION [0011] Fig. 1 is a perspective view schematically showing a slot machine according to one embodiment of the present invention. 30 In a slot machine 10, a coin, a bill, or electronic valuable information corresponding to those is used as a game medium. However, in the present invention, the game medium is not particularly limited. Examples of the game medium may include a medal, a token, electronic money and a 35 ticket. It is to be noted that the ticket is not particularly limited, and examples thereof may include a ticket with a barcode as described later. [0012] The slot machine 10 comprises a cabinet 11, a top box 40 12 installed 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 (14L, 14C, 14R) as a symbol display device are rotatably provided. On the peripheral face of each of the reels 14, a symbol sequence 45 consisting of 22 figures (hereinafter also referred to as symbols) is drawn. [0013] A lower image display panel 16 is provided at the front C:\NRPortbl\)CC\JI.H\4346362_1 DOC-5/23/2012 -5 of the respective reels 14 on the main door 13. The lower image display panel 16 is provided with a transparent liquid crystal panel to which a variety of information concerning a game, an effect image and the like are displayed during the 5 game. [0014] On the lower image display panel 16, three display windows 15 (15L, 15C, 15R) are formed in which their back faces are' visible, and three symbols drawn on the peripheral 10 face of each of the reels 14 are respectively displayed via each of the display windows 15. On the lower image display panel 16, one winning line L horizontally crossing over the three display windows 15 is formed. The winning line L is for determining a combination of symbols. When the 15 combination of symbols that are stop-displayed along the winning line L is a predetermined combination, coins are paid out in number according to the combination and the number of inserted coins (the number of BETs). [0015] 20 It is to be noted that, in embodiments of the present invention, it may be possible to provide a configuration such that, for example, there are formed a plurality of winning lines L crossing horizontally or diagonally over the three display windows 15, and the winning lines L in number 25 according to the number of inserted coins are verified, and when a combination of symbols stop-displayed along the verified winning line L is a predetermined combination, coins are paid out in number according to the combination. Further, when a specific symbol (so-called scatter 30 symbol) is stop-displayed to the display window, coins may be paid out in number according to the number of the scatter symbols regardless of the combination of symbols. [0016] Moreover, although not shown, a touch panel 69 is 35 provided at the front face of the lower image display panel 16. The player can operate the touch panel 69 to input a variety of commands. [0017] Below the lower image display panel 16, there are 40 provided a control panel 20 comprised of a plurality of buttons 23 to 27 with each of which a command according to game progress is inputted by the player, a coin receiving slot 21 through which a coin is accepted into the cabinet 11, and a bill validator 22. 45 [0018] 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 C \NRPoUl\DCC\JI.)1\4346362_ .Do-5/23/2012 -6 inputting a command to start rotation of the reels 14. The change button 24 is used for making a request of staff in the recreation facility for exchange. The CASHOUT button 25 is used for inputting a command to pay out credited coins to 5 a coin tray 18. [0019] THE FOLLOWING PAGE IS PAGE 9 9 The 1-BET button 26 is used for inputting a command to bet one coin on a game out of 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 (three coins in the 5 present embodiment) out of credited coins. In addition, the maximum number of BETs may be configured so as to be set by the operator, staff or the like of the casino. [0020] The bill validator 22 not only discriminates a regular 10 bill from a false bill, but also accepts the regular bill into the cabinet 11. It is to be noted that the bill validator 22 may be configured so as to be capable of reading a later-described ticket 39 with a barcode. At the lower front of the main door 13, namely below the control panel 20, there is provided a belly 15 glass 34 on which a character or the like of the slot machine 10 is drawn. [00211 An upper image display panel 33 is provided at the front face of the top box 12. The upper image display panel 33 is 20 provided with a liquid crystal panel to display, for example, an effect image, an image representing introduction of contents of a game, and explanation of a rule of the game. [0022] Also, a speaker 29 is provided on the top box 12. Under 25 the upper image display panel 33, there are provided a ticket printer 35, a card reader 36, a data display 37, and a key pad 38. The ticket printer 35 prints on a ticket a barcode as coded data of the number of credits, a date, an identification number of the slot machine 10, and the like, and outputs the ticket 30 as the ticket 39 with a barcode. The player can make another slot machine read the ticket 39 with a barcode to play a game thereon, or exchange the ticket 39 with a barcode with a bill or the like at a predetermined place in the recreation facility (e.g. a cashier in a casino). 35 [0023] 10 The card reader 36 reads data from a smart card and writes data into the smart card. The smart card is a card owned by the player, and for example, data for identifying the player and data concerning a history of games played by the player are 5 stored therein. Datacorresponding toacoin, a billor acredit may be stored in the smart card. Further, a magnetic stripe card may be adopted in place of the smart card. The data display 37 iscomprisedofafluorescentdisplayand the like, anddisplays, for example, data read by the card reader 36 or data inputted 10 by the player via the key pad 38. The key pad 38 is used for inputting a command and data concerning issuing of a ticket, and the like. [0024] Fig. 2 isablockdiagramshowing the internal conf iguration 15 of the slot machine shown in Fig. 1. Agamingboard50 is provided witha CPU (Central Processing Unit) 51, a ROM 55, and a boot ROM 52 which are interconnected to one another by an internal bus, a card slot 53S corresponding to a memory card 53, and an IC socket 54S corresponding to a 20 GAL (Generic Array Logic) 54. [0025] The memory card 53 is comprised of a nonvolatile memory such as CompactFlash (registered trade mark) , and stores a game program and a game system program. The game program includes 25 a to-be-stopped symbol determination program. The to-be-stopped symbol determination program is a program for determining a symbol (code No. corresponding to the symbol) on each of the reels 14 to be stop-displayed along the winning line L. The to-be-stopped symbol determination program includes 30 symbol weighing data respectively corresponding to a plurality of types of payout ratios (e.g. 80%, 84%, 88%). The symbol weighing data is data showing the corresponding relation between code No. of each symbol (see Fig. 23) and one or a plurality of random numbers belonging to a predetermined numerical range 35 (0 to 255) , for each of the three reels 14. The payout ratio 11 is set based on payout ratio setting data which is outputted from a GAL 54, and a symbol to be stop-displayed is determined based on the symbol weighing data corresponding to the payout ratio. 5 [0026] Further, the card slot 53S is configured so as to allow the memory card 53 to be inserted thereinto or ejected therefrom, and is connected to the mother board40by an IDE bus. Therefore, the memory card 53 can be ejected from the card slot 53S, and 10 then another game program and another game system program are written into the memory card 53, and the memory card 53 can be inserted into the card slot 53S, to change the type and contents of a game played on the slot machine 10. Further, the memory card 53 storing one game program and one game system program 15 can be exchanged with the memory card 53 storing another game program and another game system program, to change the type and contents of a game played on the slot machine 10. The game program includes a program according to progression of the game. Further, the game program includes 20 image data and sound data to be outputted during the game, and image data and sound data for notifying that the mode has been shifted to the insurance mode, and the like. [0027] The GAL 54 is a type of a PLD having an OR fixed type array 25 structure. The GAL 54 is provided with a plurality of input ports and output ports. When predetermined data is inputted into the input port, the GAL 54 outputs, from the output port, data corresponding to the inputted data. The data outputted from the output port is the above-mentioned payout ratio setting 30 data. Further, the IC socket 54S is configured such that the GAL 54 can be mounted thereonto and removed therefrom, and the IC socket 54S is connected to the mother board 40 through the PCI bus. Therefore, the GAL 54 can be removed from the IC socket 35 54S, and then a program to be stored into the GAL 54 is rewritten, 12 and the GAL 54 is then mounted onto the IC socket 54S, to change thepayoutratiosettingdataoutputtedfromtheGAL54. Further, the GAL 54 can be exchanged with another GAL 54 to change the payout ratio setting data. 5 [0028] The CPU 51, the ROM 55 and the boot ROM 52 interconnected to one another by an internal bus are connected to the mother board 40 through the PCI bus. The PCI bus not only conducts signal transmission between the mother board 40 and the gaming 10 board 50, but also supplies power from the mother board 40 to the gaming board 50. In the ROM 55, country identification information and an authentication program are stored. In the boot ROM 52, an auxiliary authentication program and a program (boot code) to be used by the CPU 51 for activating the auxiliary 15 authentication program, and the like are stored. [0029] The authentication program is a program (falsification check program) f or authenticating a game program and a game system program. The authentication program is written along a 20 procedure (authentication procedure) for checking and proving that a game program and a game system program to be subject to authentication loading processing have not been falsified, namely authenticating the game program and the game system program. The auxiliary authentication program is a program for 25 authenticating the above-mentioned authentication program. Theauxiliaryauthenticationprogramiswrittenalongaprocedure (authentication procedure) for proving that an authentication program to be subject to the authentication processing has not been falsified, namely authenticating the authentication 30 program. [0030] The mother board 40 is configured using a commercially available general-purpose mother board (a print wiring board on which fundamental components of a personal computer are 35 mounted) , and comprises a main CPU 41, a ROM (Read Only Memory) 13 42, aRAM (RandomAccess Memory) 43, anda communication interface 44. The main CPU 41, the ROM 42 and the RAM 43 mounted on the mother board 40 constitute the controller of the present invention. 5 [0031] The ROM 42 is comprised of a memory device such as a flash memory, and stores a program such as a BIOS (Basic Input/Output System) executed by the main CPU 41 and permanent data. When the BIOS is executed by the main CPU 41, processing for 10 initializing a predetermined peripheral device is conducted, concurrently with start of processing for loading the game program and the game system stored in the memory card 53 via the gaming board 50. It should be noted that, in the present invention, the ROM 42 may or may not be data rewritable one. 15 [0032] The RAM 43 stores data and a program to be used at the time of operation of the main CPU 41. Further, the RAM 43 is capable of storing an authentication program to be read via the gaming board 50, a game program and a game system program. 20 [0033] Further, the RAM 43 is provided with a storage area for an insurance mode flag. The insurance mode flag is a flag for indicating whether the mode is the insurance mode or the non-insurance mode. The storage area for the insurance mode 25 flagis, forexample, composedofastorageareaofapredetermined number of bits, and the insurance mode flag is turned "ON" or "OFF" according to the stored contents of the storage area. The insurance mode flag being "ON" indicates the insurance mode, and the insurance mode flag being "OFF" indicates the 30 non-insurance mode. Further, the RAM 43 is provided with a storage area for data showing the number-of-games C. Moreover, the RAM 43 stores data of the number of credits, the number of coin-ins and coin-outs in one game, and the like. 35 The communication interface 44 serves to communicate with an 14 external device such as a server of the casino, via the communication line 101. [0034] Moreover, the mother board 40 is connected with a 5 later-described body PCB (Printed Circuit Board) 60 and a door PCB 80 through respective USBs. Further, the mother board 40 is connected with a power supply unit 45. When power is supplied from the power supply unit 45 to the mother board 40, the main CPU 41 of the mother board 40 is activated concurrently with 10 supply ofpower to the gamingboard 50 via the PCI bus toactivate the CPU 51. [0035] The body PCB 60 and the door PCB 80 are connected with an equipment and a device that generate an input signal to be 15 inputted into the main CPU 41 and an equipment and a device operations of which are controlled by a control signal outputted from the main CPU 41. The main CPU 41 executes the game program and the game system program stored in the RAM 43 based on the input signal inputted into the main CPU 41, and thereby executes 20 the predetermined arithmetic processing, stores the result thereof into the RAM 43, or transmits a control signal to each equipmentanddeviceasprocessingforcontrollingeachequipment and device. [0036] 25 The body PCB 60 is connected with a lamp 30, a sub CPU 61, a hopper 66, a coin detecting portion 67, a graphic board 68, a speaker 29, a touch panel 69, a bill validator 22, a ticket printer 35, a card reader 36, a key switch 38S and a data display 37. The lamp 30 is lighted in a predetermined pattern based 30 on a control signal outputted from the main CPU 41. [0037] The sub CPU 61 serves to control rotation and stop of the reels 14 (14L, 14C, 14R) . A motor driving circuit 62 having an FPGA (Field Programmable Gate Array) 63 and a driver 64 are 35 connected to the subCPU61. The FPGA63 is anelectronic circuit 15 such as a programmable LSI, and functions as a control circuit of a stepping motor 70. The driver 64 functions as an amplification circuit of a pulse to be inputted into the stepping motors 70. The stepping motors 70 (70L, 70C, 70R) for rotating 5 therespectivereels 14 areconnected tothemotordrivingcircuit 62. The steppingmotor70 is aone-twophase excitationstepping motor. [0038] In the present invention, the excitation method of the 10 stepping motor is not particularly limited, and for example, a two phase excitation method, one phase excitation method or the like may be adopted. Further, a DC motor may be adopted in place of the stepping motor. In the case of adopting the DC motor, a deviation counter, a D/A converter, and a servo 15 amplifier are sequentially connected to the sub CPU 61, and the DC motor is connected to the servo amplifier. Further, a rotationalpositionof theDCmotorisdetectedbyarotaryencoder, and a current rotational position of the DC motor is supplied as data from the rotary encoder to the deviation counter. 20 [0039] Further, an index detecting circuit 65 and a position-change detecting circuit 71 are connected to the sub CPU 61. The index detecting circuit 65 detects the position (later-described index) of the reels 14 during rotation, and 25 is further capable of detecting a loss of synchronism of the reels 14. It should be noted that the control of rotation and stoppage of reels 14 will be described later in detail using the figures. [0040] 30 The position-change detecting circuit 71 detects the change of the stop positions of the reel 14, after the stop of the rotation of the reels 14. For example, the position-change detecting circuit 71 detects the change of the stop positions of the reels 14, in a case such that a player forcibly changes 35 the stop positions of reels 14 to create a combination of symbols 16 in a winning state, even though the actual combination of symbols is not in the winning state, or in some other cases. The position-changedetectingcircuit 71 is configured, forexample, to detect fins (not shown) mounted to the inner sides of the 5 reels 14 at predetermined intervals so as to detect the change of the stop positions of the reels 14. [00411 The hopper 66 is installed inside the cabinet 11, and pays out a predetermined number of coins based on the control signal 10 outputted from the main CPU 41, from the coin payout exit 19 to the coin tray 18. The coin detecting portion 67 is provided inside the coin payout exit 19, and outputs an input signal to themainCPU41 inthecaseofdetectingpayoutofthepredetermined number of coins from the coin payout exit 19. 15 [0042] The graphic board 68 controls image display to the upper image display panel 33 and the lower image display panel 16 based on the control signal outputted from the main CPU 41. The number of credits stored in the RAM 43 is displayed to the 20 number-of-credits display portion 31 of the lower image display panel 16. Further, the number of payouts of coins is displayed to the number-of-payouts display portion 32 of the lower image display panel 16. The graphic board 68 comprises a VDP (Video Display 25 Processor) for generating image data based on the control signal outputted f rom themainCPU41, a video RAM for temporarily storing image data generated by the VDP, and the like. It is to be noted that image data used in generation of the image data by the VDP is included in the game program read from the memory card 53 30 and stored into the RAM 43. [00431 The bill validator 22 not only discriminates a regular bill from a false bill, but also accepts the regular bill into the cabinet 11. Upon acceptance of the regular bill, the bill 35 validator 22 outputs an input signal to the main CPU 41 based 17 on a face amount of the bill. The main CPU 41 stores in the RAM 43 the number of credits corresponding to the face amount of the bill transmitted with the input signal. [ 0044] 5 The ticketprinter35, basedon the control signal outputted from the main CPU 41, prints on a ticket a barcode formed by encoding data such as the number of credits stored in the RAM 43, a date, and an identification number of the slot machine 10, and outputs the ticket as the ticket 39 with a barcode. The 10 card reader 36 reads data from the smart card and transmits the read data to the main CPU 41, and writes data onto the smart card based on the control signal from the main CPU 41. The key switch 38S is provided on the key pad 38, and outputs a predetermined input signal to the main CPU 41 when the key pad 15 38 is operated by the player. The data display 37 displays data read by the card reader 36 and data inputted by the player via the key pad 38 based on the control signal outputted from the main CPU 41. [ 004 5] 20 The door PCB 80 is connected with a control panel 20, a reverter 21S, a coin counter 21C, and a cold cathode tube 81. The control panel 20 is provided with a spin switch 23S corresponding to the spin button 23, a change switch 24S corresponding to the change button 24, a CASHOUT switch 25S 25 corresponding to the CASHOUT button 25, a 1-BET switch 26S corresponding to the 1-BET button 26, and the maximum BET switch 27S corresponding to the maximum BET button 27. The respective switches 23S to 27S output input signals to the main CPU 41 when each of the buttons 23 to 27 corresponding thereto is operated 30 by the player. [0046] The coin counter 21C is provided inside the coin receiving slot 21, and discriminates a regular coin from a false coin inserted into the coin receiving slot 21 by the player. Coins 35 other than the regular coin are discharged from the coin payout 18 exit 19. Further, the coin counter 21C outputs an input signal to the main CPU 41 in detection of the regular coin. [0047] The reverter 21S operates based on the control signal 5 outputted from the main CPU41, and distributes a coin recognized by the coin counter 21C as the regular coin into a cash box (not shown) or the hopper 66, which are disposed in the slot machine 10. Namely, when the hopper 66 is filled withcoins, the regular coin is distributed into the cash box by the reverter 21S. On 10 the other hand, when the hopper 66 is not filled with coins, the regular coin is distributed into the hopper 66. The cold cathode tube 81 functions as a back light installed on the rear face side of the lower image display panel 16 and the upper image display panel 33, and is lit up based on the control signal 15 outputted from the main CPU 41. [0048] Fig. 3 is aview forexplainingapayout table in the present embodiment. "DOUBLE", "3BAR", "2BAR", "lBAR", and "CHERRY" in the 20 payout table represent types of symbols drawn on the reels 14. It is to be noted that, other than the above-mentioned symbols, a bonus trigger, which is a symbol corresponding to "GIFT BONUS", and other symbols are also drawn on the reels 14. In the payout table, "ANY BAR" represents the "3BAR", "2BAR" or "lBAR", and 25 "ANY" represents an arbitrary symbol. [0049] Combinations shown in the payout table represent winning combinations, and the number of coin-outs is set for each of the winning combinations, according to the numbers of BETs. 30 When a combination of symbols on each of the reels 14 which are stop-displayed is the combination of "GIFT BONUS" bonus triggers, apredeterminednumberof coins ispaidoutasajackpot. It is to be noted that a numeric value corresponding to "GIFT BONUS" in the payout table indicates an expectation value of 35 the number of coin-outs, and is constant regardless of the number 19 of BETs. Therefore, a setting is made such that the probability for establishing "GIFT BONUS" is high and the number of coin-outs is small in the case of 1BET whereas the probability for establishing "GIFT BONUS" is low and the number of coin-outs 5 is large in the case of the MAXBET. It should be noted that this probability setting is made by using symbol weighing data. [0050] Further, four types of jackpots "GRAND", "MAJOR", "MINOR" and "MINI" are provided in decreasing order of the number of 10 coin-outs. The larger the number of coin-outs, the lower the jackpot occurrence ratio is set, and which jackpot is to be established is determined randomly using a random number. It should be noted that the expectation value of the number of coin-outs according to each jackpot is constant. 15 [0051] When a game is started by pressing of the spin button 23 after pressing of a 1-BET button 26 or a maximum BET button 27, the sequence of symbols drawn on each of the reels 14 is scroll-displayed downwardly in the display windows 15 with 20 rotation of the reels 14, and after the lapse of a predetermined period of time, the sequence of symbols drawn on each of the reels 14 is stop-displayed in the display windows 15 with the stop of rotation of the reels 14. Further, a variety of winning combinations are previously set based on the respective 25 combinations of symbols, and when the combination of symbols corresponding to the winning combination stops along the winning line L, the number of coin-outs according to the winning combination is added to credits owned by the player. When the combination of "GIFT BONUS" bonus triggers is established, a 30 predetermined number of coin-outs is added to the credits owned by the player. [0052] It should be noted that, in the present embodiment, there is described the case of paying out coins according to the jackpot 35 whenthe combinationof bonus triggers is established. However, 20 the gaming state generated in establishment of the combination of bonus triggers is not particularly limited in the present invention. Examplesof the gamingstate mayinclude afree game, asecondgame, andamysterybonus. Further, when thecombination 5 of bonus triggers is established, the ticket 39 with a barcode may be issued with predetermined information printed thereon. [0053] Combinations of symbols in italic in the payout table are combinations of which the number of coin-outs to be conducted 10 is equal to or more than 180 when established in a game played with a MAXBET. In the game played with a MAXBET in the insurance mode, when any one of those combinations of symbols is established, the mode is shifted from the insurance mode to the non- insurance 15 mode. [00541 Here, insurance in the slot machine 10 is described. As for the insurance, the slot machine 10 has two modes: the insurance mode "RESCUE PAY ON" ; and the non-insurance mode 20 "RESCUE PAY OFF" The non-insurance mode is set immediately after the power is turned on in the slot machine 10, and the mode is then shifted to the insurance mode by inserting a predetermined number of game media. 25 In the insurance mode, the number of games played after shifting to the insurance mode is counted. In the present embodiment, games to be counted are those games played with a MAXBET placed thereon. When the number of games counted in the insurance mode 30 reaches 1000, 360 coins are paid out (RESCUE PAY). However, in the game played with a MAXBET in the insurance mode, when there is established acombinationof which the number of coin-outs is equal to or more than 180, the number of games counted is cleared and the mode is shifted from the insurance 35 mode to the non-insurance mode, as described above.

21 [0055] Next, the flow [P01] to [P20] of a game played on the slot machine 10 is described by using Figs. 4 to 12. Figs. 4 to 12 are views showing images displayed to the 5 upper image display panel 33 and the lower image display panel 16 provided in the slot machine 10. In the figures, a numeral 15 (15L, 15C, 15R) denotes a display window. A numeral 31 denotes a number-of-credits display portion. A numeral 32 denotes a number-of-payouts 10 display portion. A symbol L denotes a winning line. [0056] [P01] In the non-insurance mode, as shown in Fig. 4, an image 92a showing "RESCUE OFF" is displayed to the upper image display 15 panel 33. The image 92a is an image showing that the current gaming state is the non-insurance mode. Further, a normal effect image 94a is displayed to the lower image display panel 16. Moreover, a button type image 90a showing "BET FOR RESCUE 20 PAY MORE INFO" is displayed to the lower right portion of the lowerimage displaypanel 16. Theimage90aisanimage torequest an input of a command to output information concerning the insurance mode. The player can input the command to output information concerning the insurance mode by touching a 25 predetermined place of the touch panel 69 (not shown) corresponding to the display area of the button type image 90a. [0057] [P021 When the above-mentioned command is inputted, an image 30 91 showing informationconcerning the insurancemode isdisplayed to the lower image display panel 16. The image 91 includes information concerning the insurance mode as follows: (I) the number of games to reach for paying out a 35 predeterminednumberof coins, namely, aspecific number (1000); 22 (II) the number (360) of coin-outs when the number of games reaches the specific number; (III) clearing the number of games when a game with the MAXBET placed thereon and the number of coin-outs being equal 5 to or more than 180 is played before the number of games reaches the specific number, namely, a number-of-games clearing condition; (IV) shifting the mode from the insurance mode to the non-insurance mode when the game with the MAXBET placed thereon 10 and the number of coin-outs being equal to or more than 180 is played before the number of games reaches the specific number, namely, an insurance canceling condition; (V) counting the number of games with the MAXBET placed thereon and the number of coin-outs being less than a 15 predetermined number (180), namely games to be counted; and (VI) the number (1) of credits necessary for shifting the mode from the non-insurance mode to the insurance mode. [0058] Further, the image 91 includes inf ormation to make a request 20 for an option as to whether or not to shift the mode from the non-insurance mode to the insurance mode, a button type image "YES" 91a, and a button type image "NO" 91b. When a predetermined area of the touch panel 69 corresponding to the button type image "NO" 91b is touched by 25 the player, an image shown in [Poll is displayed to the lower image display panel 16. On the other hand, when a predetermined area of the touch panel 69 corresponding to the button type image "YES" 91a is touched by the player, the mode is shifted from the non-insurance mode to the insurance mode. 30 [0059) [P03] When the mode is shifted to the insurance mode, as shown in Fig. 5, an image 92b showing "RESCUE ON" is displayed to the upper image display panel 33. The image 92b is an image showing 35 that the current gaming state is the insurance mode.

23 Further, a normal effect image 94b is displayed to the lower image display panel 16. While the normal effect image 94b in the insurance mode differs from a normal effect image 94a in the non-insurance mode, these are selected randomly by 5 using random numbers, not based on whether the mode is the insurance mode or the non-insurance mode. Further, a button type image 90b showing "RESCUE ON MORE INFORMATION" is displayed to the lower right portion of the lower image display panel 16. The button type image 90b is an image 10 for showing that the current gaming state is the insurance mode andalso for inputting a command tooutput information concerning the insurance mode. When a predetermined place of the touch panel 69 corresponding to the display area of the button type image 90b 15 is touched by the player, an image shown in [P021 is displayed to the lower image display panel 16. [0060] Further, an image 93 is displayed below the button type image 90b, which shows that 360 coins are to be paid out when 20 the number of games with the MAXBET (games to be counted) reaches a specific number. [0061] [P04] When the game is started in the insurance mode, in a first 25 game in the insurance mode, a normal effect image 94c is displayed to the lower image display panel 16, and the button type image 90b and the image 93 are continuously displayed. The image 93 shows that 360 coins are to be paid out when the games to be counted are played 1000 times from now on. 30 [0062] [P05] In a second game in the insurance mode, a normal effect image 94disdisplayedand the image 93 iscontinuouslydisplayed. The image 93 shows that 360 coins are to be paid out when the 35 games to be counted are played 999 times from now on.

24 As thus described, in the slot machine 10, the image 93 is displayed to the lower image display panel 16, the image 93 showing the number of games to be played from the time point of starting the game in the insurance mode until the number of 5 games to be counted reaches a specific number. Subsequently, the number of games left to be played is counted down on the image 93 so longas the above-mentioned number-of-games clearing condition or insurance canceling condition is not established. It is to be noted that as thus described, the normal effect image 10 94 is displayed in the insurance mode until the number of games reaches 990 (notice set value). [0063] [P06] When the number of games in the insurance mode reaches 15 990 (notice set value) , as shown in Fig. 6, to the upper image display panel 33, the image 92b is displayed which shows that the current gaming state is the insurance mode and an image 96 is displayed which shows that the number of games left to be playeduntil thenumberof games tobecountedreaches the specific 20 number is ten. Further, also to the lower image display panel 16, an image 97 is displayed which shows that the number of games left to be played until the number of games to be counted reaches the specific number is ten. 25 Moreover, a specific effect image 95a is displayed to the lower image display panel 16. The specific effect image 95 is displayed after the number of games to be counted has reached the notice set value, in the insurance mode. [0064) 30 [P07] When the number of games played in the insurance mode becomes 991, the number of games left to be played which is shown by the image 96 displayed to the upper image display panel 33 changes from ten to nine. 35 Further, also to the lower image display panel 16, the 25 image 93 is displayed which shows that the number of games left to be played until the number of games to be counted reaches the specific number is nine. Moreover, a specific effect image 95b is displayed to the 5 lower image display panel 16. The specific effect image 95b is a video picture with its contents continued from the specific effect image 95a in [P06] [0065] [P08] to [P15] 10 Subsequently, as the number of games in the insurance mode increases, the number of games left to be played shown by the image 96 displayed to the upper image display panel 33 gradually decreases as shown in Figs. 7 to 10. Further, in the lower image display panel 16, the number of remaining games shown by image 15 93 is gradually decreased. Moreover, to the lower image display panel 16, specific effect images 95c to 95j are sequentially displayed according to the number of games left to be played. The specific effect image 95 is a video picture where a character (angel) performs a series of actions (action of 20 appearing and spreading her wings) , and specific effect images 95a to 95j are made by dividing the specific effect image 95 into a plurality of images along the time axis. [0066] [P16] 25 When the number of games in the insurance mode reaches the specific number, 360 coins (credits) are paid out. At this time, as shownin Fig. 11, an image 97a is displayed to the upper image display panel 33, the image 97a showing that coins are being paid out based on that the number of games in 30 the insurance mode has reached the specific number. Further, a similar image 97b is also displayed to the lower left side of the lower image display panel 16. Moreover, to the lower image display panel 16, a specific effect image 95h with its contents continued from the specific 35 effect images 95a to 95j . Furthermore, a specific effect image 26 95h' is displayed in the display windows 15 (15L, 15C, 15R). [0067] [P17] It should be noted that, when a predetermined winning 5 combination is established in a game with which the number of games in the insurance mode has reached the specific number, coins are paid out based on that the number of games has reached the specific number, and thereafter, coins are paid out based on the above-mentioned winning combination. 10 At this time, while the specific effect image 95h is continuously displayed to the lower image display panel 16, the specific effect image 95h' in the display windows 15 disappears so that the reels 14 becomes visible. Further, an image 97c is displayed to the lower left side 15 of the lower image display panel 16, the image 97c showing that coins are beingpaidout according to the above-mentioned winning combination. [0068] [P18] 20 At the end of the game with which the number of games in the insurance mode has reached the specific number, the number of games is cleared, and the mode is shifted from the insurance mode to the non-insurance mode. At this time, an image 98 showing "RESCUE OFF" is displayed 25 to the lower image display panel 16. The image 98 is an image showing that the mode has been shifted from the insurance mode to the non-insurance mode. [0069] [P19] 30 In a case where the number of games has not reached 990 (notice set value) in the insurance mode, when the combination of symbols "BAR"-"BAR"-"BAR" accompanied by coin-outs is established, an image 97d showing "45 CREDITS" is displayed to the upper image display panel 33 as shown in Fig. 12. 35 The image 97d is an image showing the number of coins to 27 be paid out according to the combination of symbols "BAR" - "BAR" -'"BAR" . Further, the image 92b showing "RESCUE ON" is displayed to the upper image display panel 33. The image 92b is an image 5 showing that the current gaming state is the insurance mode. An effect image 94e corresponding to "BAR"-"BAR"-"BAR" is displayed to the lower image display panel 16. "BAR" corresponds to "lBAR" in the payout table shown in Fig. 3. Moreover, to the lower image display panel 16, the image 10 93 is displayed which shows the number of games left to be played until the number of games to be counted reaches the specific number, and the image 97c is displayed which shows the number of coin-outs according to the combination of symbols "BAR" - "BAR" - "BAR" . 15 [0070] [P20] After thenumberofgameshasreached990 (notice setvalue) when the combination of symbols "BAR"-"BAR"-"BAR" accompanied by coin-outs is established in the insurance mode as in [P19], 20 the image 97c is displayed to the lower image display panel 16, the image 97c showing the number of coin-outs according to the combination of symbols "BAR"-"BAR"-"BAR". However, an effect image 94e corresponding to the combination of symbols "BAR"-"BAR"-"BAR" is not displayed, and 25 the specific effect image 95c is displayed as in [P08] (see Fig. 7). Other images are also displayed as in [P08]. [0071] Next, processing conducted in the slot machine 10 are described. 30 [Main processing] Fig. 13 is a flowchart showing main processing performed in the slot machine 10. First, activation processing is conducted in the slot machine 10 (step S101). The activation processing is 35 specifically described later by using Fig. 19.

28 It is to be noted that, upon receipt of a detection signal outputted from the coin counter 21C when a coin inserted into the coin receiving slot 21 is detected by the coin counter 21C after the activation processing, the main CPU 41 conducts 5 processing for adding the amount of inserted coins to the number of credits stored in the RAM 43 as interruption processing. [0072] After the processing of step S101, the non-insurance mode is displayed in the slot machine 10 (step S102). In this 10 processing, the main CPU 41 transmits a drawing command of the non- insurance mode image to the graphic board 68. On the graphic board 68, based on the above-mentioned drawing command, the VDP extracts image data from the RAM 43, expands it into a video RAM, generates image data of one frame, and outputs this image 15 data to the upper image display panel 33 and the lower image display panel 16. This results in display of an image, for example as shown in [Pol] (see Fig. 4), to the upper image display panel 33 and the lower image display panel 16. [0073] 20 Next, the main CPU 41 determines whether or not the current gaming state is the insurance mode, namely whether or not the insurance mode flag stored in the RAM 43 is "ON" (step S103) [0074] When determining that the current gaming state is not the 25 insurance mode in step S103, the main CPU 41 executes game execution processing A (non-insurance mode) (step S200), and then returns the processing to step S103. The game execution processing A is specifically described later by using Fig. 15. [0075] 30 On the other hand, when determining that the current gaming state is the insurance mode in step S103, the main CPU 41 then determines whether or not the number-of-games C stored in the RAM 43 is less than the notice set value (990 in the present embodiment) (step S104). 35 [0076] 29 When deter dining that the number-of-games C is less than the notice set value in step S104, the main CPU 41 executes game execution processing B (insurance mode/before reaching the notice set value) (step S300) , and then returns the processing 5 to step S103. The game execution processing B is specifically described later by using Fig. 16. [0077] On the other hand, when determining that the number-of-games C is not less than the notice set value in step 10 S104, namely the number-of-games C is equal to or more than the notice set value, the main CPU 41 determines whether or not the number-of-games C stored in the RAM 43 is less than a value (999) smaller than the specific number by one (step S105). [0078] 15 When determining that the number-of-games C is less than the value smaller than the specific number by one in step S105, the main CPU 41 executes game execution processing C (insurance mode/after reaching the notice set value) (step S400) since the number-of-games C will not reach the specific number in the next 20 game, and then main CPU 41 returns the processing to step S103. The game execution processing C is specifically described later by using Fig. 17. [0079] When determining that the number-of-games C is the value 25 smaller than the specific number by one in step S105, the main CPU 41 executes game execution processing D (insurance mode/at reaching of specific number) (step S500) since the number-of-games Cmay reach the specific number in the next game, and then the main CPU 41 returns the processing to step S103. 30 The game execution processing D is specifically described later by using Fig. 18. [0080] [Insurance setting processing] Further, in the slot machine 10, insurance setting 35 processing is conducted in a predetermined cycle when the 30 non-insurance mode image is displayed (see [P01] in Fig. 4) as described above. Fig. 14 is a flowchart showing a subroutine of the insurance setting processing. 5 First, the main CPU 41 determines whether or not the button type image "RESCUE PAY" 90a included in the image shown in [P01] displayed to the lower image display panel 16 has been touched, namely, whether or not to have received a detection signal that is outputted from the touch panel 69 when a predetermined place 10 of the touch panel 69 corresponding to the display area of the button type image 90a is touched (step Silo). When the main CPU 41 determines that the button type image 90a has not been touched, the present subroutine is terminated. [0081] 15 On the other hand, when determining that the button type image 90a has been touched, the main CPU 41 displays an insurance information image (see [P02] in Fig. 4), including the button type image "YES" 91a and the button type image "NO" 91b for responding to "RESCUE ON", to the lower image display panel 16 20 (step Sill). [0082] Next, the main CPU 41 determines whether or not the button type image "YES" 91a has been touched (step S112) When determining that the button type image "YES" 91a has not been 25 touched in step S112, the main CPU 41 then determines whether or not the button type image "NO" 91b has been touched (step S113) . When the main CPU 41 determines that the image "NO" 91b has been touched, the present subroutine is terminated. On the other hand, when the main CPU 41 determines that the image "NO" 30 91b has not been touched, the processing is returned to step Sill. [0083] When the button type image "YES" 91a has been touched in step S112, the main CPU 41 conducts processing for subtracting 35 a predetermined number of credits (1 in the present embodiment) 31 from the number of credits stored in the RAM 43 (step Sll4) It should be noted that bills or coins that correspond to the number of credits may be inserted in place of subtracting the number of credits. 5 Next, the main CPU 41 sets the insurance mode flag stored in the RAM 43 to "ON" so as to shift the mode to the insurance mode (step S115). The main CPU 41 then sets the number-of-games C to zero (the number-of-games C = 0) in the data storage area showing 10 the number-of -games C which is provided in the RAM 43, and starts counting the number of games (step S116). Subsequently, the main CPU 41 displays the insurance mode images shown in [P031 (see Fig. 5) to the upper image display panel 33 and the lower image display panel 16 (step S117). The 15 insurance mode image includes the image 93 showing the number of games left to be played until the number of games to be counted reaches the specific number, and some other images. After the processing of step S117, the present subroutine is terminated. [0084] 20 [Game execution processing A (non-insurance mode)] Fig. 15 is a flowchart showing a subroutine of the game execution processing A called and executed in step S200 of the subroutine shown in Fig. 13. First, the main CPU 41 conducts processing for displaying 25 the non-insurance mode image (see [P01] in Fig. 4) to the upper image display panel 33 and the lower image display panel 16 (step S201). Next, the main CPU 41 determines whether or not a coin has been BET (step S202). In this processing, the main CPU 41 30 determines whether or not to have received an input signal that is outputted from the 1-BET switch 26S when the 1-BET button 26 is operated, oran input signal that isoutputted fromamaximum BET switch 27S when the maximum BET button 27 is operated. When the main CPU 41 determines that the coin has not been BET, the 35 processing is returned to step S202.

32 [0085] On the other hand, when determining that the coin has been BET in step S202, the main CPU 41 conducts processing for making a subtraction from the number of credits stored in the RAM 43 5 according to the number of coins BET (step S203) . It is to be noted that, when the number of coins BET is larger than the number of credits stored in the RAM 43, the main CPU 41 does not conduct the processing for making a subtraction from the number of credits stored in the RAM 43, and the processing is returned to step 10 S202. Further, when the number of coins BET exceeds the upper limit of the number of coins that can be BET in one game (three coins in the present embodiment), the main CPU 41 does not conduct theprocessingformakingasubtractionfromthenumberof credits stored in the RAM 43, and the processing is proceeded to step 15 S204. [0086] Next, the main CPU 41 determines whether or not the spin button 23 has been turned ON (step S204) . In this processing, the main CPU 41 determines whether or not to have received an 20 input signal that is outputted from the spin switch 23S when the spin button 23 is pressed. When the main CPU 41 determines that the spin button 23 has not been turned on, the processing is returned to step S202. It is to be noted that, when the spin button 23 is not 25 turned ON (e.g. when the spin button 23 is not turned ON and a command to end the game is inputted) , the main CPU 41 cancels a subtraction result in step S203. [0087] In the present embodiment, a case is described where, after 30 acoinisBET (stepS202) , the processing formakingasubtraction from the number of credits is conducted (step S203) before it is determined whether or not the spin button 23 has been turned ON (step S204) . However, the present invention is not limited to this example. For example, it may be determined whether or 35 not the spin button 23 has been turned ON (step S204) after a 33 coin is BET (step S202) , and when it is determined that the spin button 23 has been turned ON (step S204: YES) , the processing for making a subtraction from the number of credits may be conducted (step S203). 5 [00881 On the other hand, when determining that the spin button 23 has been turned ON in step S204 in Fig. 15, the main CPU 41 conducts processing for displaying a normal effect image (e.g. the normal effect image 94a) . In the present embodiment, the 10 normal effect image 94 had been displayed before the spin button 23 is turned ON, and another normal effect image 94 is displayed after the spin button 23 is turned ON. It should be noted that, in the present invention, the normal effect image 94 may be displayed after the spin button 23 is turned ON. 15 [0089] Next, the main CPU 41 conducts to-be-stopped symbol determination processing (step S206). In this to-be-stopped symbol determination processing, the main CPU 41 (arithmetic processing unit) executes a to-be-stopped symbol determination 20 program stored in the RAM 43 (storage device) so as to determine a code No. in stopping the reels 14. Thereby, a combination of symbols to be stop-displayed is determined. This processing is specifically described later by using Figs. 20 and 23. It should be noted that, in the present embodiment, a case 25 is described where a combination of symbols to be stop-displayed is determined so as to determine one winning combination out of a plurality of types of winning combinations. However, in the present invention, for example, a random number may be used first so as to determine one winning combination to be selected 30 randomly from the plurality of types of winning combinations, and thereafter, a combination of symbols to be stop-displayed may be determined based on the above-mentioned winning combination. [0090] 35 Next, the main CPU 41 conducts reel rotation control 34 processing (step S207). This is the processing for starting rotation of all the reels 14 and then stopping rotation of the reels 14 so that the combination of symbols corresponding to the winning combination determined instep S206 is stop- displayed 5 along the winning line L. This processing is specifically described later by using of Figs. 21 to 23. Next, the main CPU 41 displays to the lower image display panel 16 an effect image according to stop-displayed symbols or a combination thereof (step S208). 10 [0091] Next, themainCPU4ldetermineswhetherornotacombination of bonus triggers has been established (step S220). When it is determined that the combination of bonus triggers has been established, a single jackpot is selected out of four types of 15 jackpots "GRAND", "MAJOR", "MINOR" and "MINI", and the number of coins set with respect to the selected jackpot is paid out (step S223). In the case of accumulating coins, the main CPU 41 conducts processing for adding a predetermined number of credits to the number of credits stored in the RAM 43. On the 20 other hand, in the case of paying out coins, the main CPU 41 transmits a control signal to the hopper 66 in order to pay out apredeterminednumberof coins. At that time, the coindetecting portion 67 counts the number of coins paid out from the hopper 66, and when the counted value reaches a designated number, the 25 coin detecting portion 67 transmits a payout completion signal to the main CPU 41. Thereby, the main CPU 41 stops driving of the hopper 66 and ends the coin payout processing. Thereafter, the present subroutine is terminated. [0092] 30 On the other hand, in step S220, when determining that the combination of bonus triggers has not been established, the main CPU 41 determines whether or not a winning combination has beenestablished (stepS221) . Whendetermining that thewinning combination has been established, the main CPU 41 pays out coins 35 according to the number of BETs and the winning combination (step 35 S222). When it is determined that any of winning combinations has not been established in step S221, or when the processing of step S222 or S223 is executed, the present subroutine is terminated. 5 [0093] [Game execution processing B (insurance mode/before reaching of notice set value)] Fig. 16 is a flowchart showing a subroutine of the game execution processing B which is called and executed in step S300 10 of the subroutine shown in Fig. 13. First, the main CPU 41 conducts processing for displaying the insurance mode image (see [P03 in Fig. 5] ) to the upper image displaypanel 33 and the lowerimage displaypanel 16 (stepS301) Subsequently, processing of steps S302 to S307 are 15 conducted, and the processing are similar to the processing of steps S202 to S207 shown in Fig. 15. [0094] Next, the main CPU 41 displays to the lower image display panel 16 an effect image (see [P04] , [P05] in Fig. 5) according 20 to stop-displayed symbols or a combination thereof (step S308). Next, themainCPU41determineswhetherornotacombination of bonus triggers has been established (step S320), and when determining that the combination of bonus triggers has been established, the main CPU 41 conducts jackpot payout processing 25 (step S323). On the other hand, when determining that the combination of bonus triggers has not been established in step S320, the main CPU 41 determines whether or not a winning combination has been established (step S321) . When determining that the winning 30 combination has been established, the main CPU 41 pays out coins according to the number of BETs and the winning combination (step S322) . When it is determined that any winning combination has not been established in step S321, the present subroutine is terminated. 35 [0095] 36 When executing the processing of step S322 or S323, the main CPU 41 determines whether or not the current game is a game with a MAXBET and the number of coin-outs in step S322 or step S323 is equal to or more than a predetermined number (180 in 5 the present embodiment) (step S330). [0096] In step S330, when determining that the current game is a game with a MAXBET and the number of coin-outs is not equal to or more than the predetermined number, the main CPU 41 10 increments the number-of -games C (C = C + 1) stored in the RAM 43 (step S332), and ends the present subroutine. [0097] In step S330, when determining that the current game is a game with a MAXBET and the number of coin-outs is equal to 15 or more than the predetermined number (180), the main CPU 41 sets the insurance mode flag stored in the RAM 43 to "OFF", to shift the mode to the non-insurance mode (step S340). Next, in the storage area of data showing the number-of -games C which is provided in the RAM 43, the main CPU 20 41 sets the number-of-games C to zero (C = 0) so as to clear the number of games (step S341). Subsequently, the main CPU 41 displays, to the lower image display panel 16, the image 98 (see [P18] in Fig. 11) showing that the mode has been shifted from the insurance mode to the 25 non-insurance mode (step S342) , and ends the present subroutine. [0098] [Game execution processing C (insurance mode/after reaching of notice set value)] Fig. 17 is a flowchart showing a subroutine of the game 30 execution processing C which is called and executed in step S400 of the subroutine shown in Fig. 13. First, the main CPU 41 conducts processing for displaying the insurance mode image to the upper image display panel 33 and the lower image display panel 16 (step S401). 35 Subsequently, processing of steps S402 to S404 are 37 conducted, and the processing of those steps is similar to the processing of steps S202 to S204 shown in Fig. 15. [0099] Next, the main CPU 41 displays specific effect images 95a 5 to 95i (see [P061 to [P14] in Figs. 6 to 9) to the lower image display panel 16 (step S405). As described above, the specific effect image 95 is avi.deo picture of an action of an angel as a character who appears and spreads her wings, and the specific effect images 95a to 95j 10 aremade bydividing the specificeffectimage 95 intoaplurality of images along the time axis. Therefore, with increase in number of games, the action of the angel as the character who appears and gradually spreads her wings is displayed by the specific effect image 95. 15 [0100] Subsequently, processing for steps S406 and S407 are performed, and the processing of these steps is similar to the processing of steps S206 and S207 shown in Fig. 15. After the processing of step S407, the main CPU 41 conducts 20 processingforcontinuouslydisplaying thespecificeffect image 95 even after rotation of the reels 14 has been stopped (step S408). It is to be noted that, in the processing shown in Fig. 17, when symbols or a combination thereof, accompanied by 25 coin-outs, is established, the main CPU 41 does not display the effect image 94e which is displayed according to the symbols or the combination thereof as shown in [P19] (see Fig. 12) . In place of that, the main CPU 41 displays the image 97c showing the number of coin-outs according to the symbols or the 30 combination thereof while displaying the specific effect image 95 as shown in [P20] (see Fig. 12). [0101] Subsequently, steps S420 to S423, S430 to S432 and S440 to S442 are conducted, and the processing of these steps are 35 similar to the processing of steps S320 to S323, S330 to S332 38 and S340 to S342 shown in Fig. 16, respectively. [0102] [Game execution processing D (insurance mode/at reaching of specific number)] 5 Fig. 18 is a flowchart showing a subroutine of the game execution processing D which is called and executed in step S500 of the subroutine shown in Fig. 13. First, the main CPU 41 conducts processing for displaying the insurance mode image to the upper image display panel 33 10 and the lower image display panel 16 (step 5501). Subsequently, processing of steps S502 to S504 are conducted, and the processing of these steps is similar to the processing of steps S202 to S204 shown in Fig. 15. [0103] 15 Next, the main CPU 41 displays a specific effect image 95j (see [P15] in Fig. 10) to the lower image display panel 16 (step S505). The specific effect image 95j has contents continued from the specific effect images 95a to 95i, and displays an action 20 of the angel as the character having spread her wings. [0104] Subsequently, processingofstepss506 toS508 isconducted, and the processing of these steps is similar to the processing of steps S206 to S208 shown in Fig. 15. 25 After the processing of step S507, the main CPU41 conducts processing forcontinuouslydisplaying thespecificeffect image 95j even after rotation of the reels 14 has stopped (step S508). It is to be noted that in the processing shown in Fig. 18, as in Fig. 17, when symbols or a combination thereof, 30 accompanied by coin-outs, is established, the main CPU 41 displays the image 97c showing the number of coin-outs according to the symbols or the combination thereof while displaying the specific effect image 95 as shown in [P20] (see Fig. 12). [0105] 35 Next, the main CPU 41 determines whether or not the current 39 game is a game with a MAXBET and a game where coins are paid out in number equal to or more than a predetermined number (180 in the present embodiment) (step S530) In step S530, when determining that the current game is 5 a game with a MAXBET and is not a game where coins are paid out in number equal to or more than a predetermined number, the main CPU 41 increments the number-of-games C (= 999) (C = C + 1) (step S532) stored in the RAM 43. Thereby, the number-of-games C reaches the specific number 1000. 10 Next, the main CPU 41 displays an image shown in [P16] to the upper image display panel 33 and the lower image display panel 16 (step S533). Namely, the image 97a isdisplayedtotheupperimagedisplay panel 33, the image 97a showing that coins are being paid out 15 basedon that thenumberof games in the insurancemodehas reached a specific number, and the similar image 97b is also displayed to the lower left side of the lower image display panel 16. Moreover, the specific effect image 95h with contents continued from the specific effect images 95a to 95j is displayed 20 to the lower image display panel 16. Furthermore, the specific effect image 95h' is displayed in the display windows 15 (15L, 15C, 15R) [01061 Subsequently, the main CPU 41 pays out a predetermined 25 number (360 in the present embodiment) of coins while displaying the image shown in [P16] (step S534). [0107] After the processing of step S534, the main CPU 41 stops display of the specific effect image 95h' in the display windows 30 15 while displaying the specific effect image 95h to the lower image display panel 16 so as to display the specific effect image 95 in such a manner as to make the reels 14 visible (step S535) [0108] In step S530, when determining that the current game is 35 a game with a MAXBET and a game where the number of coin-outs 40 is equal to or more than the predetermined number, or when executing the processing of step S535, the main CPU 41 sets the insurance canceling flag stored in the RAM43 to "ON" (step S536) The insurance canceling flag is a flag indicating that the 5 insurance canceling condition is established when set to "ON" [0109] Next, the main CPU 41 determines whether or not the combination of bonus triggers has been established (step S520) and when determining that the combination of bonus triggers has 10 been established, the main CPU 41 conducts a jackpot payout processing (step S523). On the other hand, in step S520, when determining that the combination of bonus triggers has not been established, the main CPU 41 determines whether or not a winning combination has 15 been established (step S521), and when determining that the winning combination has been established, the main CPU 41 pays out coins according to the number of BETs and winning combination (step S522) . The payout processing in step S534 and step S522 or S523 are not particularly required to be conducted 20 individually, but the number of payouts may be previously added together, and the obtained number of payouts of game media may be paid out in one time payout processing. [0110] When determining that the winning combination has not been 25 established in step S521 or executing the processing of step S522 or step S523, the main CPU 41 determines whether or not the insurance canceling flag stored in the RAM 43 has been set to "ON" (step S524) . When it is determined that the insurance canceling flag has not been set to "ON", the present subroutine 30 is terminated. [0111] On the other hand, when determining that the insurance canceling flag has been set to "ON" in step S524, the main CPU 41 sets the insurance mode flag stored in the RAM 43 to "OFF" 35 so as to shift the mode to the non-insurance mode (step S540).

41 Next, in the storage area of data showing the number-of-games C which is provided in the RAM 43, the main CPU 41 sets the number-of-games C to zero (C = 0) so as to clear the number of games (step S541) 5 Subsequently, the main CPU 41 displays, to the lower image display panel 16, the image 98 (see [P18] in Fig. 11) showing that the mode has been shifted from the insurance mode to the non-insurancemode (stepS542), andsets the insurance canceling flag to "OFF" (step S543) . Thereafter, the present subroutine 10 is terminated. [0112] [Activation processing) Fig. 19 is a flowchart showing a procedure called and executed in step S101 of the flowchart shown in Fig. 13. This 15 activation processing is the processing conducted by the mother board 40 and the gaming board 50. It should be noted that the memory card 53 is inserted into the card slot 53S in the gaming board 50, and the GAL 54 is mounted onto an IC socket 54S. [0113] 20 First, when a power switch is turned on (power is turned on) in the power supply unit 45, the mother board 40 and the gamingboard 50 are activated (steps S1-1, S2-1). Inactivation of the mother board 40 and the gaming board 50, respective individual processing is executed in parallel. Namely, in the 25 gaming board 50, the CPU 51 reads the auxiliary authentication program stored in the boot ROM 52, and conducts auxiliary authentication according to the read auxiliary authentication program, to previously check and prove that the authentication program is not falsified before loading the program to the mother 30 board 40 (step S2-2) . Meanwhile, in the mother board 40, the main CPU 41 executes the BIOS stored in the ROM 42, and expands compressed data which is incorporated in the BIOS into the RAM 43 (step S1-2). The main CPU 41 then executes the BIOS expanded into the RAM 43 to diagnose and initialize a variety of peripheral 35 devices (step S1-3).

42 [0114] Since the ROM 55 of the gaming board 50 is connected to the main CPU 41 via the PCI bus, the main CPU 41 reads the authentication program stored in the ROM 55, and stores the read 5 authentication program into the RAM 43 (steps Sl-4) . At this time, according to the standard BIOS function of BIOS, the main CPU 41 takesachecksumbyADDSUM system (normal checking system) and stores the authentication program into the RAM 43, while conducting processing for confirming whether or not the storage 10 is certainly conducted. [0115] Next, after confirming what is connected to the IDE bus, the main CPU 41 accesses, via the IDE bus, the memory card 53 inserted in the card slot 53S, to read a game program or a game 15 system program from the memory card 53. In this case, the main CPU 41 reads data constituting the game program and the game systemprogramby4 bytes. Subsequently, themainCPU4lconducts authentication to check and prove that the read game program and game system program have not been falsified, following the 20 authentication program stored in the RAM 43 (step Sl-5) . When this authentication processing is normally completed, the main CPU 41 writes and stores the game program and the game system program, which have been the authentication targets (which have been authenticated) , into the RAM 43 (step S1-6) . Next, the 25 main CPU 41 accesses, via the PCI bus, the GAL 54 mounted on the IC socket 54S, reads payout ratio setting data from the GAL 54, and writes and stores the data into the RAM 43 (step S1-7) . Subsequently, the main CPU 41 conducts processing for reading country identification information stored in the ROM 55 of the 30 gaming board 50 via the PCI bus, and writes and stores the read country identification information into the RAM 43 (step S1-8) [0116) After conducting the above-mentioned processing, the main CPU 41 sequentially reads and executes the game program and the 35 game system program, to execute the processing shown in Fig.

43 13. [0117] [To-be-stopped symbol determination processing) Fig. 20 is a flowchart showing a subroutine of the 5 to-be-stopped symbol determination processing called and executed in step S206 of the subroutine shown in Fig. 15. This is the processing conducted such that the main CPU 41 executes the to-be-stopped symbol determination program stored in the RAM 43. 10 First, the main CPU 41 executes a random number generation program included in the to-be-stopped symbol determination program, to select random numbers respectively corresponding to the three reels 14, out of the numbers falling in the numeric range of 0 to 255 (step S31). In the present embodiment, the 15 case of generating random numbers on the program (the case of usingaso-calledsoftwarerandomnumber) isdescribed. However, in the present invention, a random number generator may be provided and random numbers may be extracted from the random number generator (a so-called hardware random number may be 20 used). [0118] Next, the main CPU 41 (arithmetic processing unit) determines a code No. (see Fig. 23) of the respective reels 14 basedon the selected threerandomnumbers, byreferringtosymbol 25 weighing data according to the payout ratio setting data outputted from GAL 54 and stored in the RAM 43 (storage device) (step S32) . The code Nos. of the respective reels 14 correspond to code Nos. of symbols to be stop-displayed along the winning line L. It should be noted that later-described reel rotation 30 control processing is conducted based on these code Nos. of the reels. [0119] [Reel rotation control processing) Fig. 21 is a flowchart showing the reel rotation control 35 processing called and executed in step S207 of the subroutine 44 shown in Fig. 15. It is to be noted that this is the processing conducted between the main CPU 41 and the sub CPU 61. [0120] First, the main CPU 41 transmits to the sub CPU 61 a start 5 signal to start rotation of the reels (step S40) . Upon receipt of the start signal from the main CPU 41, the sub CPU 61 conducts the reel rotation processing (step S51) . In this processing, the sub CPU 61 supplies a pulse to the motor driving circuit 62. The pulse outputted from the sub CPU 61 is amplified by 10 the driver 64, and then supplied to each of the stepping motors 70 (70L, 70C, 70R). This results in rotation of each of the stepping motors 70, along with which each of the reels 14 (14L, 14C, 14R) is rotated. In the one-two phase excitation stepping motor 70, a step angle is 0.9 degrees and the number of steps 15 per rotation is 400. Therefore, when 400 pulses are supplied to the stepping motor 70, the reel 14 rotates one turn. [0121] Instartingrotationof the reels 14, the subCPU61 supplies a low frequency pulse to the motor driving circuit 62, and 20 gradually increases the pulse frequency. Along with this, a rotational speed of the reels 14 increases. After a lapse of a predetermined period of time, the pulse frequency is made constant. This results in rotation of the reel 14 at a constant speed. 25 [0122) Here, the rotational operation of the reel 14 is described by using Figs. 22A to 22D. Figs. 22Ato22Daresideviewsforexplaining therotational operation of the reel 14. 30 As shown in Fig. 22A, a semicircular metal plate 14a is provided on the side face of the reel 14. The metal plate 14a is rotated along with the reel 14. Further, 22 symbols are provided on the peripheral face of the reel 14. Three symbols out of the 22 symbols drawn on the peripheral face of the reel 35 14 become visually identifiable via the display window 15 formed 45 in front of the reel 14. In the figure, heavy-line arrows indicate the rotational direction of the reel 14. Further, an adjacent sensor 65a is provided on the side face of the reel 14. The adjacent sensor 65a is for detecting the metal plate 5 14a. The adjacent sensor 65a does not move or rotate along with rotation of the reel 14. [0123] Fig. 22A shows a position (hereinafter also referred to as position A) of the metal plate 14a at the time point when 10 the adjacent sensor 65a starts detecting the metal plate 14a. When the reel 14 rotates with the metal plate 14a located in the position A, the metal plate 14a moves to a position shown inFig. 22B. Fig. 22Bshows a position (hereinaf teralso referred to as position B) of the metal plate 14a when the adjacent sensor 15 65a is detecting the metal plate 14a. When the reel 14 rotates with the metal plate 14a located in the position B, the metal plate 14a moves to a position shown in Fig. 22C. Fig. 22C shows a position (hereinafter also referred to as position C) of the metal plate 14a at the time point when the adjacent sensor 65a 20 stops detecting the metal plate 14a. [0124] When the reel 14 rotates with the metal plate 14a located in the position C, the metal plate 14a moves to a position shown inFig. 22D. Fig. 22Dshowsaposition (hereinafteralsoreferred 25 to as position D) of the metal plate 14a when the adjacent sensor 65aisnotdetectingthemetalplatel4a. Whenthereell4rotates with the metal plate 14a located in the position D, the metal plate 14a returns to the position A. As thus described, the position of the metal plate 14a changes sequentially from the 30 position A, the position B, the position C, the position D, the position A, and so forth, along with rotation of the reel 14. [0125] The adjacent sensor 65a constitutes the index detecting circuit 65 (see Fig. 2). Assuming that the state where the 35 adjacent sensor 65a is detecting the metal plate 14a is referred 46 to as "High" and the state where the adjacent sensor 65a is not detecting the metal plate 14a is referred to as "Low", the index detecting circuit 65 is in the "High" state when the metal plate 14a is located in the position A -4 the position B -> the position 5 C, and the index detecting circuit 65 is in the "Low" state when the metal plate 14a is located in the position C -> the position D-> thepositionA. ItistobenotedthatthesubCPU61 identifies the rotational position of the reel 14 such that a leading edge from "Low" to "High" as index (original point) 1 and a falling 10 edge from "High" to "Low" as index (original point) 2. [0126] After transmitting a start signal to the sub CPU 61 in step S40, the main CPU 41 executes effects in rotation of the reels (stepS41) . This is the processingfordisplayinganimage 15 to the lower image display panel 16, outputting sound from the speaker 29, and the like, during a period (e.g. 3 seconds) set according to a result of the to-be-stopped symbol determination processing (Fig. 15, step S206) or the like. [0127] 20 Next, the main CPU 41 determines whether or not the current time point is the timing for instructing to stop rotation of the reels 14 (step S42). Here, the timing for instructing to stop rotation of the reels 14 is the timing before the time point of stopping the 25 performanceof effects inrotationofthereelsonlyby theminimum time required for stopping rotation of the reels 14. It is to be noted that the minimum time required for stopping rotation of the reels 14 is previously set. [0128] 30 In step S42, when determining that the current time point is not the timing for instructing to stop rotation of the reels 14, the main CPU 41 returns the processing to step S42, and continuously executes the performance of effects in rotation of the reels. On the other hand, when determining that the 35 current time point is the timing for instructing to stop rotation 47 of the reels 14 in step S42, the main CPU 41 transmits code No. stored in the RAM 43 to the sub CPU 61 (step S43) . Upon receipt of code No. of the reels from the main CPU 41, the sub CPU 61 converts code No. into the stop position (the number of steps) 5 of each reel from the index, based on the correspondence table of the number of steps stored in ROM (not shown) comprised in CPU 61 and code No. (step S52). [0129] Fig. 23 is a schematic view showing a correspondence table 10 of the number of steps and code No. Each code No. is corresponded to index and the number of steps. It should be noted that each code No. corresponds to a symbol drawn on the peripheral face of the reel 14. Symbols of code No. "00" to "10" correspond to index 1. Symbols of code 15 No. "11" to "21" correspond to index 2. Further, the numbers of steps in the correspondence table shown in Fig. 23 are the numbers of steps set with index 1 as a reference. For example, when code No. is "08", a position 145 steps from index 1 is the stop position of the reel. Further, when code No. is "12", a 20 position 218 steps from index 1 is the stop position of the reel. [0130] Next, the sub CPU 61 executes a reel stoppage processing (step S53). In this processing, the sub CPU 61 detects the leading edge (index 1) from "Low" to "High" of each reel 14 in 25 the indexdetecting circuit 65, and supplies the indexdetecting circuit 65 with pulses corresponding to the number of steps into which code No. has been converted in step S52, at the timing of detecting index 1, and thereafter, the supply of the pulse is stopped. 30 [0131] For example, when it is determined that the stop position of the reel is a position 145 steps from index 1 in step S52, the sub CPU 61 supplies the index detecting circuit 65 with 145 pulses at the timing of detecting index 1, and then stops the 35 supply of the pulse. Further, in step S52, when it is determined 48 that the stop position of the reel is a position 218 steps from index 1, the sub CPU 61 supplies the index detecting circuit 65 with 218 pulses at the timing of detecting index 1. As a result, the reels 14 stop with the code numbers as determined 5 in stepS32 in Fig. 20, andacombinationof symbols corresponding to the winning combination determined in step S32 in Fig. 20 is stop-displayed along the winning line L. Meanwhile, the main CPU 41 ends the performance of effects in rotation of the reels. After completing the processing of steps S44 and S53, the present 10 processing is terminated. [0132] It is to be noted that, when index corresponding to code No. transmitted in step S43 differs from index detected by the index detecting circuit 65 in stopping rotation of the reels 15 14, a loss of synchronism has occurred in the reels 14, and therefore, the main CPU 41 conducts processing for displaying an error message to the lower image display panel 16, or the like, to discontinue the game. For example, when the index 1 is detected by the index 20 detectingcircuit65instoppingrotationofthereels14although the main CPU 41 conducts the processing for stopping reels 14 at code No. 12 which is corresponding to index 2, the game is discontinued. [0133] 25 As described above, according to the slot machine 10, the mode is shifted from the non-insurance mode to the insurance mode on condition that one coin has been inserted, and in the insurance mode, the number of games played after shifting to the insurance mode is counted. When the number of games counted 30 reaches 1000, 360 coins are paid out. On the other hand, when a game is played in which the number of coin-outs is equal to or more than 180, the number of games counted is cleared. [0134] Therefore, the player can shift the mode from the 35 non-insurance mode to the insurance mode by inserting one coin.

49 Further, in the insurance mode, the player can gain a predetermined profit by playing games until the number of games played reaches 1000 even in a case where the player has consumed a large number of coins as games have been played over a long 5 period time, or some other cases. Therefore, it is possible to prevent a player who has consumed a large number of coins from mounting senses of discomfort and mistrust and losing an interest in the game. Meanwhile, since being able to obtain 360 coins by playing games over a long period of time, the player 10 does not have a sense of unfairness against a player gaining a benefit from the game. [0135] Further, when the game is played in which the number of coin-outs is equal to or more than 180 in the insurance mode, 15 thenumberofgamescountediscleared, therebymakingitpossible to delay the timing for returning a profit to a player whose senses of discomfort and mistrust have been removed by temporarily receiving a large number of coins. It is thus possible to accurately narrow a target receiving a returned 20 profit down to a player who has played games over a long period of time and mounted senses of discomfort and mistrust. As a result, it is possible to prevent a player who has consumed a large number of coins from mounting senses of discomfort and mistrust and losing an interest in the game, while preventing 25 the player from having a sense of unfairness against a player gaining a benefit from the game. [0136] In the present embodiment, the case has been described where the number-of-games clearing condition is that a game is 30 played in which the number of payouts of game media is equal to or more than a predetermined number before the number of games reaches a specific number, the specific number being 1000 and the predetermined number being 180. In the present invention, the specific number is not 35 particularly limited. Further, for example, the specific 50 number may be set randomly by using a random number every time the mode is shifted to the insurance mode. Moreover, it may be made possible for the player, the operator of the casino or the like to set the number of credits 5 that can be paid out for shifting the mode from the non-insurance mode to the insurance mode, and the specific number may be set according to the number of credits such that the larger the number of credits, the smaller specific number is set. [0137] 10 In the present invention, the above-mentioned predetermined number is not particularly limited. Further, the above-mentionedpredeterminednumbermaybesetrandomlybyusing a random number every time the mode is shifted to the insurance mode. 15 Moreover, the predetermined number may be set according to the number of credits such that the number of credits that can be paid out for shifting the mode from the non-insurance mode to the insurance mode can be set by the player, the operator of the casino or the like and the larger the number of credits, 20 the larger predetermined number may be set. [0138] In the present embodiment, the case has been described where the insurance canceling condition is the same as the number-of-games clearing condition. However, in the present 25 invention, the insurance canceling condition is not necessarily the same as the number-of-games clearing condition. Examples of the insurance canceling condition may include a combination of bonus triggers being established and the balance of payment of game media reaching a predetermined reference. 30 [0139] In the present embodiment, the case has been described where the number of game media (credits) necessary for shifting the mode from the non-insurance mode to the insurance mode is a predetermined number (1) . However, in the present invention, 35 the number of game media (credits) necessary for shifting the 51 mode from the non-insurance mode to the insurance mode is not particularly limited. Further, the number of game media (credits) necessary for shifting the mode from the non-insurance mode to the insurance 5 mode may be set by the player, the operator of the casino or the like, and the number-of-games clearing condition and/or the insurance canceling condition may be made different according to the set number of credits. Furthermore, the number of game media (credits) necessary for shifting the mode from the 10 non-insurance mode to the insurance mode may be changed at predetermined timing, or may be changed when a predetermined condition is established. [0140] In the present embodiment, the case has been described 15 where games tobe counted are games in which the number of payouts of game media is less than a predetermined number (180) out of games with the maximum number of BETs of game media being BET thereon. However, in the present invention, the games to be counted 20 are not limited to this example, and for example, all actually played games may be counted. [0141] In the present embodiment, the case has been described where the number of payouts of game media when the number of 25 games reaches a specific number is constant. However, in the present invention, the number of payouts of game media when the number of games reaches a specific number may be, for example, determined randomly by using a random number. Further, the number of payouts of game media may be set by the balance of 30 payment or the like. [0142] The slot machine 10 according to the present embodiment is a stand-alone type slot machine counting the number of games. However, in the present invention, the slot machine is not 35 necessarily a stand-alone type slot machine, and a server 52 connected to a plurality of slot machines via a network may count the number of games played in each slot machine. [0143] Fig. 24 is a schematic view showing an entire configuration 5 of a game system according to one embodiment of the present invention. A game system 100 comprises a plurality of slot machines 10 and a server 200 connected with these slot machines 10 via a predetermined communication line 101. Such a game system 100 10 maybe constructed inside one recreation facilitywhereavariety of games can be played, such as a bar or a casino, or constructed among a plurality of recreation facilities. In the case of constructing the game system inside one recreation facility, the game system 100 may be constructed on each floor or in each 15 section of the recreation facility. The communication line 101 is not particularly limited, andmaybe eitherwiredorwireless, andan exclusive line, anexchange line or the like canbe adopted. [0144] The server 200 controls a plurality of slot machines 10. 20 In the present embodiment, inparticular, the server 200 conducts the processing for counting the number of games played in each slotmachinelO. The server200mayhaveafunctionasaso-called hall server which is installed in a recreation facility having a plurality of slot machines 10, a server to control a plurality 25 of recreation facilities in block, or the like. It is to be noted that each slot machine 10 is provided with a unique identification number, and the server 200 determines from which slot machine data is transmitted according to the identification number. Also when data is transmitted from the server 200 to 30 the slotmachine10, the server200specifies towhichslotmachine the datawillbe transmitted, byusing the identificationnumber. [0145] In the above-mentioned example, the case of using mechanical reels 14 has been described. However, in the present 35 invention, symbols may be displayed to a display device such C: \NHo,,bI\DCC\J1.C\4346362_1 .DOC-5/23/2012 - 53 as a liquid crystal display device in place of the mechanical reels. Fig. 25 is a perspective view schematically showing a slot machine according to another embodiment of the present 5 invention. Except for displaying symbols to a lower image display panel, a slot machine 300 has substantially the same appearance, circuit configuration and the like as those of the slot machine 10, and the flowchart of the slot machine 10 300 is substantially the same as that of the slot machine 10. Therefore, descriptions of the slot machine 300 are omitted except for a description of symbol display. Further, constituents corresponding to those of the slot machine 10 are provided with the same numerals as in the 15 slot machine 10. The lower image display panel 16 included in the slot machine 300 is provided with symbol display areas 250 of three columns and three rows, and one symbol is displayed in each symbol display area. In such a configuration, the 20 scroll-display of symbols may be displayed to the lower image display panel 16 in place of the reel rotation control by the sub CPU 61. [0146] According to one embodiment of the present invention, 25 on condition that a predetermined number (e.g. 1) of game media (e.g. coins or credits corresponding to coins) have been inserted, the mode is shifted from the non-insurance mode to the insurance mode, and in the insurance mode, the number of games played after shifting to the insurance mode 30 is counted. When the number of games counted reaches a specific number (e.g. 1000), a predetermined number (e.g. 360) of game media is paid out. On the other hand, when a game is played in which the number of payouts of game media is equal 35 to or more than a predetermined number (e.g. 180) before the number of games counted reaches a specific number, the number of games counted is cleared. [0147] It is therefore possible for the player to insert a 40 predetermined number of game media so as to shift the mode from the non-insurance mode to the insurance mode. Further, in the insurance mode, even in a case where the player consumes a large number of game media as playing games over a long period time, or some other cases, the player can gain 45 a predetermined profit by playing games until the number of games reaches a specific number. Therefore, it is possible to prevent a player who has consumed a large number of game media from mounting senses of discomfort and mistrust and C: \d Por tbl \DCC\JLH\4346362_ I . C-5/23/2012 - 54 losing an interest in the game. Meanwhile, since it is possible to gain a profit by playing games over a long period of time, the player does not have a sense of unfairness against a player gaining a benefit from the game. 5 [0148] When a game is played in which the number of payouts of game media is equal to or more than a predetermined number in the insurance mode, the number of games counted is cleared, thereby making it possible to delay the timing for 10 returning a profit (offering a benefit that accompanies the number of games reaching a specific number) to a player whose senses of discomfort and mistrust have been removed by temporarily receiving a large number of game media. It is thus possible to accurately narrow a target 15 receiving a returned profit down to a player who has played games over a long period of time and mounted senses of discomfort and mistrust. As a result, it is possible to prevent a player who has consumed a large number of game media from mounting senses of discomfort and mistrust and 20 losing an interest in the game, while preventing the player from having a sense of unfairness against a player gaining a benefit from the game. [0149] According to one embodiment of the present invention, 25 when a game is played in which the number of payouts of game media is equal to or more than a predetermined number in the insurance mode, the number of games counted is cleared and the mode is shifted from the insurance mode to the non insurance mode. 30 [0150] Therefore, it is possible to exclude a player, whose senses of discomfort and mistrust have been removed by temporarily receiving a large number of game media, from a target player to receive a returned profit. As a result, it 35 is possible to more accurately narrow a target receiving a returned profit down to a player who has played games over a long period of time and mounted senses of discomfort and mistrust. [0151] 40 According to one embodiment of the present invention, only games with the maximum number of BETs of game media being BET thereon can be the target to be counted. [0152] It is therefore possible to return a profit to a player 45 who has consumed a large number of game media so as to prevent the player from having a sense of unfairness and mounting senses of discomfort and mistrust. [0153] C:\NRPorth1\DCC\JLH\4346362_1. Doc-5/23/2012 - 55 According to one embodiment of the present invention, on condition that a predetermined number (e.g. 1) of game media (e.g. coins or credits corresponding to coins) have been inserted, the mode is shifted from the non-insurance 5 mode to the insurance mode, and in the insurance mode, the number of games played after shifting to the insurance mode is counted. When the number of games counted reaches a specific number (e.g. 1000), a predetermined number (e.g. 360) of 10 game media is paid out. On the other hand, when a game is played in which the number of payouts of game media is equal to or more than a predetermined number (e.g. 180) before the number of games counted reaches a specific number, the number of games counted is cleared. 15 [0154] It is therefore possible to prevent a player who has consumed a large number of game media from mounting senses of discomfort and mistrust and losing an interest in the game. Meanwhile, since it is possible to gain a profit by 20 playing games over a long period of time, the player does not have a sense of unfairness against a player gaining a benefit from the game. [0155] According to one embodiment of the present invention, 25 it is possible to prevent a player who has consumed a large number of game media from mounting senses of discomfort and mistrust and losing an interest in the game, while preventing the player from having a sense of unfairness against a player gaining a benefit from the game. 30 [0156] Further, the foregoing detailed descriptions centered the characteristic parts of embodiments of the present invention in order to facilitate understanding of the present invention. The present invention is not limited to 35 the embodiments in the foregoing specific descriptions but applicable to other embodiments with a variety of application ranges. Further, terms and phrases in the present specification were used not for restricting interpretation of the present invention but for precisely 40 describing the present invention. It is considered easy for the skilled in the art to conceive other configurations, systems, methods and the like included in the concept of the present invention from the concept of the invention described in the specification. Therefore, it should be 45 considered that recitations of the claims include uniform configurations in a range not departing from the range of technical principles of the present invention. Moreover, an object of the abstract is to enable a patent office, a C:\NPorthl\CC\J1\4346362_1.DoC-5/23/2012 - 56 general public institution, an engineer belonging to the technical field who is unfamiliar with patent, technical jargon or legal jargon, and the like, to smoothly determine technical contents and an essence of the present application 5 with simple investigation. Accordingly, the abstract is not intended to restrict the scope of the invention which should be evaluated by recitations of the claims. [0157] The foregoing detailed descriptions include processing 10 executed on a computer or a computer network. Explanations and expressions above are described with the aim of being most efficiently understood by the skilled person in the art. In the specification, each step for use in deriving one result should be understood as the self-consistent 15 processing. Further, in each step, transmission/reception, recording or the like of an electrical or magnetic signal is performed. While such a signal is expressed by using a bit, a value, a symbol, a letter, a term, a number or the like in processing of each step, it should be noted that those are 20 used simply for the sake of convenience in description. While there are cases where processing in each step may be described using an expression in common with that of action of a human, processing described in the specification is essentially executed by a variety of devices. Further, 25 another configuration requested for performing each step becomes apparent from the above descriptions. [0158] Although the embodiments of the present invention were described above, they were just illustrations of specific 30 examples, and hence do not particularly restrict the present invention. A specific configuration of each step and the like is appropriately changeable in terms of design. Further, the effects described in the embodiments of the present invention are just recitations of the most suitable 35 effects generated from the present invention. The effects of the present invention are thus not limited to those described in the embodiments of the present invention. [0159] Throughout this specification and the claims which 40 follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of 45 integers or steps. [0160] The reference in this specification to any prior publication (or information derived from it), or to any C:\NPrbl\DCC\JL\4346362_1.OOC-5/23/2012 - 57 matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in 5 the field of endeavour to which this specification relates.

58 variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. 5 [0160] The reference in this specification to any prior publication (or information derived from it) , or to any matter whichisknown, isnot, andshouldnotbe takenasanacknowledgment oradmissionoranyformof suggestionthat thatpriorpublication 10 (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

Claims

1. A slot machine comprising: a symbol display device capable of variably displaying 5 a plurality of symbols; and a controller, said controller programmed to execute the processing of: (A) executing a game in which said plurality of symbols 10 are variably displayed and then stop-displayed to said symbol display device after game media are BET in number equal to or less than a previously set maximum number of BETs, and game media are paid out in number according to the stop-displayed symbols or a combination thereof; 15 (B) shifting a mode from a non-insurance mode to an insurance mode on condition that a predetermined number of game media is inserted; (C) counting a number of games played after shifting to said insurance mode, in said insurance mode; 20 (D) paying out a predetermined number of game media when the number of games counted in said processing (C) reaches a specific number; and (E) clearing the number of games counted in said processing (C), when a game is played in which game media 25 are paid out in number equal to or more than a predetermined number before the number of games counted in said processing (C) reaches said specific number, wherein said processing (C) includes 30 counting the number of games in which game media are BET in number equal to said maximum number of BETs after shifting to said insurance mode, in said insurance mode.

2. The slot machine according to claim 1, 35 wherein said processing (E) further comprises the processing of: clearing the number of games counted in said processing (C) and also shifting the mode from said insurance mode to 40 said non-insurance mode when a game is played in which game media are paid out in number equal to or more than a predetermined number before the number of games counted in said processing (C) reaches said specific number. 45

3. A game control method comprising the steps of: (A) executing a game in which a plurality of symbols are variably displayed and then stop-displayed to a symbol display device capable of variably displaying a plurality of C:\NRPorbl\DCC\JILH\4346362_1.DOC-5/23/2012 - 60 symbols after game media are BET in number equal to or less than a previously set maximum number of BETs, and game media are paid out in number according to the stop-displayed symbols or a combination thereof; 5 (B) shifting a mode from a non-insurance mode to an insurance mode on condition that a predetermined number of game media is inserted; (C) counting a number of games played after shifting to said insurance mode, in said insurance mode; 10 (D) paying out a predetermined number of game media when the number of games counted in said step (C) reaches a specific number; and (E) clearing the number of games counted in said step (C) when a game is played in which game media are paid out 15 in number equal to or more than a predetermined number before the number of games counted in said step (C) reaches said specific number, wherein said processing (C) includes 20 counting the number of games in which game media are BET in number equal to said maximum number of BETs after shifting to said insurance mode, in said insurance mode.