JP2005211473A - Game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a game machine itself to detect a high probability that a ROM storing processing procedures of the game machine may be fraudulently falsified. <P>SOLUTION: This game machine comprises a main control part provided with the ROM storing game fixed information including a game program, a first RAM at least hardly detachably connected to the ROM, and a first central processing means sequentially processing the game procedure based on the game program; and a sub-control part in a regularly energized state having a second central processing means executing an output control of various types of display means based on a control command from the first central processing means and a second RAM. The second central processing means extracts collation data, allows the first RAM and the second RAM to store the collation data, detects whether or not the collation data stored in the first RAM and the second RAM are agreed with each other, when the both are not agreed, determines that the ROM of the main control part is not a regular ROM and outputs a disagreement signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a gaming machine, and more particularly to a gaming machine that can detect a high probability that a ROM containing gaming fixed information has been tampered with.

Recent gaming machines, such as pachinko machines and slot machines, are controlled by a microcomputer. The microcomputer functions as a central processing means (CPU) that performs arithmetic processing, data reading and There are storage means (RAM) that can be written, storage means (ROM) that can be read only by storing programs and data necessary for the operation of the gaming machine in advance, and the game of the gaming machine by this microcomputer The contents of the rules and procedures are determined, and the game machine is generally controlled by the microcomputer according to the player's operation.

Here, in addition to the control program for controlling the movable parts of the gaming machine according to a predetermined procedure based on the rules of the game executed by the CPU, the ROM has special benefits according to the model of the gaming machine. Game fixed information such as data that determines the probability of occurrence of an accessory is stored, and it is an important part that aims to harmonize the interests of the player and the game provider. Must be made so that the ROM cannot be attached or detached.
On the other hand, a gaming machine that can provide only the contents of a game with little change and unexpectedness cannot attract the player's interest, and it is necessary to evolve the game content frequently in order to attract the player. For this purpose, the ROM is provided on the electronic circuit board so that it can be changed quickly according to the times, so that the operation of the gaming machine can be changed by replacing the ROM. It was made like that. Alternatively, a gaming machine using a one-chip microcomputer incorporating a ROM function in recent years has adopted a structure that can quickly replace the entire microcomputer or the entire circuit board provided with the microcomputer.

Here, in order to achieve both the fact that the ROM or the one-chip microcomputer can be replaced quickly and the opportunity for unauthorized alteration of the electronic circuit board or electronic parts by the three younger brothers, it has been conventional that the ROM or the one-chip is used. Locking the board on which the microcomputer is provided (see Japanese Patent Laid-Open Nos. 11-4947 and 2001-62114), a ROM, a one-chip microcomputer, or a board on which these are mounted, can be sealed only once. ROM or one-chip microcomputer using a communication function of an external communication circuit incorporated in the CPU, making it possible to discover that it has been tampered with (see JP 2001-137428 A and JP 2001-137428 A). Such as checking the contents of the memory and checking for tampering
Japanese Patent Laid-Open No. 11-4947 JP 2001-62114 A JP 2001-137428 A JP 2001-137428 A

However, it is difficult to change the game contents by replacing the ROM or 1-chip microcomputer, and it is not easy to cope with version upgrades. If the structure makes it easy to handle this, there is a problem that the locking is easily broken. In addition, with the seal-sealing method, although it is easy to change game contents and cope with version upgrades, tampering can only be detected visually after the fact, so it was difficult to detect early tampering. . Further, in the system using the communication function, there is a possibility that the stored contents of the ROM of the gaming machine or the one-chip microcomputer can be rewritten by adding a signal to a terminal for external communication.
Therefore, the present invention checks the stored contents of the RAM having a backup function that is difficult to separate from the ROM by itself, and detects that there is a high probability that the ROM has been tampered with. An object is to provide a gaming machine having a function to perform.

  In other words, the gaming machine of the present invention according to claim 1 is based on a game program based on a ROM storing game fixed information including a game program, at least a first RAM that is hard to be separated from the ROM, and the game program. And a second central processing means for performing output control of various display means on the basis of a control command from the first central processing means, The second central processing means extracts the verification data and stores the verification data in the first RAM and the second RAM. At the same time, it is detected whether or not the matching data stored in the first RAM and the second RAM match each other, and if both do not match, it is determined that the ROM of the main control unit is not a regular ROM do it, It is characterized in that a coincidence signal to output.

  Further, in the gaming machine of the present invention according to claim 2, in the invention according to claim 1, the collation data is a ROM identification number given individually for each ROM.

  Further, in the gaming machine of the present invention according to claim 3, in the invention according to claim 1, the collation data changes with the passage of time.

In the gaming machine of the present invention, when the ROM is exchanged, the ROM and the first RAM having a backup function that is difficult to separate from the ROM are exchanged at the same time, so the contents of the first RAM are examined. As a result, it is possible to immediately know that the ROM has been tampered with, and it is possible to detect and deal with fraud early. In particular, the sub-control unit is always energized, and there is no possibility that the verification data is lost from the second RAM. However, if the power of the first RAM is cut off due to the alteration of the ROM, the first control unit The content of the RAM immediately disappears, and the tampering person cannot know the content of the first RAM, and it is difficult to write the same value as the second RAM into the first RAM afterwards. Therefore, tampering can be effectively prevented.

  The embodiment of the present invention will be described below assuming that the gaming machine 1 is a pachislot machine, but the present invention is not limited to the gaming machine 1 being a pachislot machine. FIG. 1 is a perspective view showing an external appearance of the pachi-slot machine 1. The pachislot machine is provided with a display window 101 through a display window 103 on the panel display unit 100, and a rotating reel 104 or a rotating reel 106 in which a plurality of symbols are arranged from each display window to the outermost periphery thereof. ing. Each symbol is drawn in a range of approximately the same area as a predetermined region of each display window, and only one symbol is included in the range of the predetermined region of each display window when the rotation of the reel is stopped. Yes. The rotary reels 104 to 106 are arranged coaxially and are driven to rotate about the coaxial line. The rotation of the rotary reel 104 to the rotary reel 106 is stopped by each rotary reel. The player can operate the reel stop button 107 to the stop button 109 corresponding to the above. Further, the gaming machine 1 includes an insertion slot 114 for inserting a game medium (medal or coin), and a start lever 115 operated by a player to start the game.

  Such a pachislot machine game is performed as follows. First, the game is started by inserting a game medium into the insertion slot 114, and a display means 101 rotates the control reel (not shown) by rotating the rotary reel 104 or the rotary reel 106 according to the operation of the start lever 115 by the player. Alternatively, the symbols visible from the display window 103 are sequentially changed.

  The rotation of the rotary reel 104 to the rotary reel 106 is stopped sequentially after a certain time, automatically or by the player pressing the reel stop button 107 or the stop button 109. At this time, if the symbols of the rotating reel 104 or the rotating reel 106 stopped at a position immediately below the predetermined range of the display window 101 to the display window 103 become a specific combination (winning symbol), the game medium is paid out. By giving out, it gives excitement and some benefits to the player.

  Such control of the pachislot machine is performed by the circuit unit shown in the block diagram of FIG. 2 provided inside the gaming machine 1, and the circuit unit is connected to the main control unit 81 and the communication port of the main control unit 81. The sub-control unit 82 includes a peripheral device circuit unit connected to the I / O port of the main control unit 81 or the I / O port of the sub-control unit 82.

  The main control unit 81 includes the microcomputer 40 disposed on the circuit board as a main component. In addition, the main control unit 81 samples a random number generation circuit 46 that generates a random number and a random number value at that time at a predetermined time. It comprises a sampling circuit 47 and a clock generation circuit 44 that generates a clock as a reference signal for advancing the processing of the microcomputer 40 step by step.

  The microcomputer 40 includes a CPU 41 that is a central processing unit that performs control operations according to a preset program, and a ROM 42, a RAM 43, and a RAM 45 that are storage units. The ROM 42 is a read-only memory, and the RAM 43 and the RAM 45 are readable / writable memories. However, the memory contents are lost when the power is turned off. The DRAM (Dynamic Random Access Memory) or SRAM (Static Random Access Memory). ).

  Further, the ROM 42 and the RAM 45 are coupled so as to be difficult to separate. The fact that it is coupled with difficulty in separation means that it is coupled to such an extent that other than the manufacturer of the gaming machine 1 cannot be easily separated, for example, the main control unit 81 cannot approach other than the manufacturer. If the main control unit 81 is firmly sealed, the ROM 42 and the RAM 45 are composed of a one-chip IC, or the entire microcomputer 40 is a one-chip microcomputer. However, the present invention includes various modes such as using one of the registers in the CPU having a small storage capacity without providing the RAM 45 separately.

  The ROM 42 includes a program that is a procedure for operating the CPU, a probability lottery table that is referred to each time the start lever 115 is operated, a stop control table for determining a reel stop mode according to the operation of the stop button, A communication protocol for communicating with the control unit 82 is stored. The above-mentioned program governs the rules of the game, and the probability lottery table determines the frequency of occurrence of an accessory that gives a special benefit to the player. Therefore, the merchant who manufactures and sells these gaming machines 1 is the player's preference. It is desirable that the ROM 42 can be easily replaced for the purpose of game content tailored to the game, and for version upgrades. On the other hand, the ROM 42 is replaced in a malicious manner so as to be advantageous to the self. This creates room for third parties to tamper with the content.

  The RAM 43 stores data that should be temporarily saved during program execution, and the RAM 45 stores data for specifying that the contents of the ROM 42 have not been tampered with. Although it is certain, this will be described in detail later.

  The CPU 41 has a plurality of I / O ports, and the I / O ports cause unexpected development of games that do not depend on skills, and incorporate contingency into the game so that the player does not get bored. The random number generator 46 and the sampling circuit 47 for generating random numbers are connected, and the CPU 41 controls the operation start of the random number generator and the sampling timing. In the processing procedure of the CPU 41, a random number may be generated and sampling may be executed. In that case, the random number generator 46 and the sampling circuit 47 can be omitted.

  A plurality of actuators are connected to the other I / O ports of the CPU 41 via a drive circuit, and a stepping motor 50 or a stepping motor 52 that rotationally drives the rotary reel 104 or the rotary reel 106 via a motor drive circuit 49. It is connected.

  Further, the start switch 21, the inserted game medium sensor 22, the reel stop signal detection circuit 56, and the reel position detection circuit 60 are connected to other I / O ports of the CPU 41. , It is detected that the start lever 115 has been operated, a signal from the inserted game medium sensor 22 is detected to detect that a game medium has been inserted into the game medium insertion port 114, and a signal from the reel stop signal circuit 56 is detected. It is detected that the stop button 107 or the stop button 109 is operated, and the position of the rotating reel 104 or the rotating reel 106 is detected by a signal from the reel position detection circuit 60.

  Note that the peripheral device circuit section including these drive circuits and detection circuits is mounted on an individual board and provided close to the actuator, but mounted on the individual board and used as a sensor for generating these signals. They may be provided close to each other, may be provided as a part of the main control unit 81, or may be provided as a part of the sub control unit 82.

  The CPU 41 includes a communication port, and performs communication with the CPU 11 provided in the sub-control unit 82 based on a predetermined communication protocol.

  The sub control unit 82 includes a microcomputer 10 disposed on a circuit board different from the main control unit 81 as a main component, and in addition, a battery that supplies power to the clock generation circuit 14 and the sub control unit 82. 53, and the sub-control unit 82 is always energized by the battery 53. The microcomputer 10 includes a CPU 11 that is a central processing unit that performs a control operation according to a preset program, and a ROM 12, a RAM 13, and a RAM 15 that are storage units. The functions of the ROM 12, RAM 13 and RAM 15 are the same as the functions of the ROM 42, RAM 43 and RAM 45 in the main controller 81, and the RAM 13 and RAM 15 are DRAM or SRAM. Further, by using a one-chip microcomputer in which the functions of the CPU 11, ROM 12, RAM 13 and RAM 15 are integrated, it is possible to reduce the area occupied by the sub-control unit 82, reduce the component cost, and the manufacturing cost. The signal from the clock generation circuit 44 can be used as the clock of the CPU 11.

  Various lamps provided in the panel display unit 100 are connected to the I / O port of the CPU 11 via the lamp driving circuit 55, and the speaker 23 and the speaker 24 are connected via the speaker driving circuit 58 and stored in the ROM 12. A complex sound effect is produced in accordance with the program procedure being controlled, and the brightness and darkness of various lamps are controlled. The peripheral circuit portions of the lamp driving circuit 55 and the speaker driving circuit 58 are mounted on individual substrates to be actuators. The sub-control unit 82, whether it is provided near the sensor, mounted on an individual board, and provided near the sensor for generating those signals, or provided as a part of the main control unit 81. It may be provided as a part of.

  Further, the other I / O ports of the CPU 11 are connected to a hopper driving circuit 54 that drives a hopper 48 that pays out a predetermined number of game media and a payout detection circuit 61 that detects completion of the game media payout.

  Further, the communication ports of the CPU 11 and the CPU 41 are connected so that they can communicate with each other, and the CPU 11 and the CPU 41 exchange data with each other via the communication port. For example, when the CPU 41 instructs the CPU 11 to output sound from the speaker through the communication port, the CPU 11 performs the subsequent processing only in the sub-control unit 82 and sends a predetermined signal in the CPU 11 according to the program procedure. The synthesized signal is sent to the I / O port to which the speaker drive circuit 58 is connected. Thus, each of the main control unit 81 and the sub-control unit 82 has a CPU, so that the processing load on the main control unit 81 is reduced, and it is possible to process a game based on a more sophisticated and complex game rule. On the other hand, the sub-control unit 82, once receiving a control command from the main control unit, outputs various display means and the like independently of the main control unit 81. Since the control is performed exclusively, an advanced and complicated output display is possible, and an effect that evokes the excitement and curiosity of the player from the viewpoint of hearing and vision can be produced.

  The sub-control unit 82 is not a software such as a game rule or an occurrence frequency of an accessory, but a part that controls hardware of the acoustic and visual effects of the gaming machine 1, so that the necessity for version upgrade is required. It is scarce and can be attached to the gaming machine 1 in a manner that is difficult for all people including the manufacturer to touch.

  Further, if it is desired to upgrade the software for operating the sub-control unit 82, it can be performed as follows. In other words, the processing performed by the CPU 11 is generally controlled by the contents of the program stored in the ROM 12, but it is not always necessary to store the program in the ROM 12, and the ROM 12 is subject to change. Only a communication program that is a program related to a minimum function that is not necessary, a program that controls the popper 50 related to security, a determination program that matches or does not match the later-described verification data, and the like are stored. Immediately after the gaming machine 1 is turned on and the CPU 41 and the CPU 11 are reset, most of the program can be downloaded from the ROM 42 to the RAM 13 via the CPU 11 and the CPU 11 can be controlled by the program stored in the RAM 13. it can.

  If such a configuration is adopted, what kind of sound effect is output from the speaker 23 and the speaker 24 when winning the winning combination, how various lamps provided on the panel display unit 100 are blinked, etc. Can be freely selected by replacing the ROM 42, so that the manufacturer does not need to touch the sub-control unit 82 except when a failure occurs, and therefore the circuit board provided with the sub-control unit 82 is difficult to attach or detach. It can be mounted on the gaming machine 1 in a manner that makes it difficult to place or detach.

  In such a gaming machine 1, how the gaming machine 1 operates will be briefly described.

  First, the random number generator 46 generates a random number belonging to a certain numerical range, and the sampling circuit 47 samples one random number at an appropriate timing after the start lever 115 is operated. The internal winning combination is determined based on the random numbers sampled in this way and the probability lottery table stored in the ROM 42. When the internal winning is made, the CPU 41 determines to the player based on the operation signal sent from the reel stop signal circuit 56 and the selected stop control table when the player operates the stop button 107 to the stop button 109. A signal for stopping and controlling the rotating reel 104 or the rotating reel 106 is sent to the motor drive circuit 49 so as to be advantageous.

  In the stop mode based on the winning of the winning combination in the internal winning, the CPU 41 sends a payout command signal to the CPU 11 via the communication port, and the CPU 11 supplies the hopper control signal to the hopper driving circuit 54 via the I / O port. Then, a predetermined number of game media are paid out from the hopper 48. At that time, the payout detection circuit 61 counts the number of game media to be paid out from the hopper 48, and notifies the CPU 11 of a game media payout completion signal when the counted value reaches a designated number. As a result, the CPU 11 stops driving the hopper 48 via the hopper drive circuit 54, ends the game medium payout process, and notifies the CPU 42 that the payout process has ended via the communication port of the CPU 11. During this time, the sub-control unit 82 continues to provide the sound effect by the speaker 23 and the speaker 24 according to the progress of the game and the visual effect by blinking of various lamps based on the command from the main control unit 81.

As described above, the CPU 41 proceeds with the game process based on the procedure stored in the ROM 42, and controls the generation of the character for which the player obtains a special benefit based on the probability lottery table stored in the ROM 42. If it is possible to easily win a prize or alter the probability of winning a prize and obtain a large amount of game media more frequently than usual, the game provider will lose a large loss. In addition, if such a criminal act can be easily performed, those who use the gaming machine 1 will lose interest as a healthy entertainment, resulting in a great social loss. Therefore, how to detect such alteration of the ROM early and reliably will be specifically described below.
This will be specifically described with reference to the flowcharts shown in FIGS.
The control operation of the CPU 41 of the microcomputer 40 will be described with reference to the flowchart shown in FIG.
First, power is turned on (step [hereinafter referred to as ST] 1).
Next, when the power supply reaches a predetermined voltage, the CPU 41 is so-called hardware reset (ST2).

  Next, the verification data stored in the RAM 45 is sent to the CPU 11 in response to a request from the CPU 11 (ST3). Specifically, the contents of the RAM 45 are loaded into the communication register of the CPU 41 and sent to the communication register of the CPU 11 via the communication port.

Next, the CPU 11 is requested to receive a match / mismatch determination result from the CPU 11 (ST4). Specifically, the result determined by the CPU 11 is loaded into the communication register of the CPU 11 and loaded into the communication register of the CPU 41 via the communication port.
Next, the process branches according to the match / mismatch determination result (ST5).
If they do not match, the process loops infinitely through the NOP (instruction that does nothing) and does not proceed any further (ST6). Therefore, no game processing is performed regardless of how the player operates the gaming machine.
In the case of coincidence, new collation data from the CPU 11 is written in the RAM 45 (ST7). Specifically, in response to a request from the CPU 41, new verification data is loaded into the communication register of the CPU 11 and sent to the communication register of the CPU 41 via the communication port.

    Finally, normal game program processing is started (ST8). The processing contents of the normal game program are started by inserting the game medium into the slot 114 described above, and when it becomes a winning symbol, the game medium is given out excitement and some benefit by paying out the game medium. The processing procedure in the CPU 41 until grant is described in relation to the player's operation of the reel stop button 107 to the stop button 109.

  The control operation of the CPU 11 of the microcomputer 10 will be described with reference to the flowchart shown in FIG.

First, power is turned on (ST21).
Next, when the power supply reaches a predetermined voltage, the CPU 11 is so-called hardware reset (ST22).
Next, the CPU 41 is requested to receive the collation data stored in the RAM 45 from the CPU 41. (ST23).
Next, the collation data stored in the RAM 45 and the collation data stored in the RAM 15 are determined to match or not, and the process branches according to the result (ST24). Specifically, the contents of the communication register of the CPU 11 and the contents of the RAM 15 are loaded into the comparison register of the CPU 11, and whether the match flag is 1 or 0 determines whether Yes or No.

  In the case of a mismatch, a match / mismatch determination result is sent to the CPU 41 in response to a request from the CPU 41 (ST25), and a warning process is performed (ST26). The specific content of the warning process is to perform warning operation of warning sound and warning lamp blinking to notify the discrepancy and notify the surroundings of the occurrence of an abnormal situation.

  Even in the case of coincidence, the coincidence / non-coincidence determination result is sent to the CPU 41 in response to a request from the CPU 41 (ST27).

  Next, in response to a request from the CPU 41, new verification data is sent to the CPU 41 (ST28).

Next, new verification data is written in the RAM 15 (ST29).
Finally, normal game program processing is started (ST30). The processing contents of the normal game program are started by inserting the game medium into the slot 114 described above, and when it becomes a winning symbol, the game medium is given out excitement and some benefit by paying out the game medium. The processing procedure of the CPU 11 until grant is described in relation to the player's operation of the reel stop button 107 to the stop button 109.

  The collation data used in the above specific examples is a ROM ID (identification number) unique to the ROM 42 that is individually assigned to each ROM, and is read by the CPU 41 and recognized by the CPU 11 via the communication port. Even if it is the operation history of the gaming machine 1 that has been recorded for management of the behavior of the gaming machine 1 so far (for example, temporal recording of the number of coins inserted and paid out by the player) Whether it is a random value generated inside the CPU 11 or a time-series signal generated inside the CPU 11, it is a cumulative sum of source codes of commands issued by the CPU 11 in the previous game. Alternatively, even when a plurality of time-series signals generated inside the CPU 11 and recorded at a plurality of addresses in the RAM 45 and RAM 15 are recorded, It is those that can also be a verification data and the combined viewing.

  In particular, since the ROM identification number is different for each ROM 45, it is effective for finding alterations in the ROM 45, and if it is determined whether or not a plurality of pieces of verification data that change over time are matched, the ROM 45 Since all the data in the RAM 45 before the tampering is lost, it is effective to understand at which point the tampering occurred.

  For example, since the operation history of the gaming machine 1 changes every moment as long as the player operates the gaming machine 1, it is difficult to predict, and a random number or a predetermined numerical value that changes every moment is If it is recorded cumulatively as collation data every predetermined time, all the collation data is recorded as time series or summation in the RAM 15 provided on the side of the sub-control unit 82 that is always energized. On the other hand, regarding the RAM 45 on the main control unit 81 side, once the ROM 42 is removed for the purpose of falsification, the power supply to the RAM 45 that is difficult to be separated from the ROM 42 is also cut off, and all the RAM 45 stored in the RAM 45 is disconnected. Since the collation data will disappear, it is possible to easily find the alteration by comparing the contents of the RAM 15 and the contents of the RAM 45.

  In addition, as the initial setting of the program for controlling the main control unit 81 when the power is turned on and the initial setting of the program for controlling the sub control unit 82, it is determined whether the contents of the RAM 45 and the RAM 15 match or do not match. As shown in FIG. 5, as interrupt processing in a program controlling the main control unit, and interrupt processing in a program controlling the sub control unit as shown in FIG. You may make it perform the process of a coincidence / non-coincidence judgment. The predetermined condition may be, for example, when a payout command is output from the hopper or when coin insertion is detected, and the interrupt processing is performed simultaneously by the main control unit and the sub control unit.

  The step number of the match / mismatch determination interrupt routine of the main control unit shown in FIG. 5 is the same as that described above. If the coincidence / non-coincidence judgment result is coincidence, the process returns to the address where the interruption occurred, and the process proceeds. However, if there is no coincidence, an infinite loop occurs, and the CPU 41 does not reset unless the power is reset. The process in the main control unit is substantially stopped without returning to the address where the interrupt occurred.

  Similarly, if the step number of the matching / non-matching determination interrupt routine of the main control unit shown in FIG. 6 is the same as that described above, the same processing contents are used. The process returns to the address No. 1 and proceeds to the process, but if it does not match, the warning action process is performed.

  If such an interrupt process is performed, a signal from the start switch 21 and a signal from the input game medium sensor 22 output when the start lever 115 of the gaming machine is operated to the hardware interrupt ports of the CPU 41 and the CPU 11. If a signal from a fee payment machine (not shown), a signal issued at regular intervals from a hardware timer (not shown), etc. are input, every time the start lever 115 of the gaming machine is operated, a game medium is inserted. Every time a special card for paying a fee for playing with a gaming machine is inserted into a fee payment machine (not shown) or every predetermined time, interrupt processing is performed, and the contents of RAM 45 and RAM 15 match by CPU 41 and CPU 11. It can be determined whether or not.

    As described above, the verification data is written in both the RAM 45 of the main control unit 81 and the RAM 15 of the sub control unit 82. However, the RAM 15 of the sub control base 82 is difficult to be tampered with by a third party. It is attached in a manner that cannot be touched. On the other hand, since the RAM 45 of the main control unit 81 is provided so as to be difficult to separate from the ROM 42, the RAM 45 is also falsified when the ROM 42 is falsified. However, it is normal for a person who maliciously alters the ROM to prepare the alteration ROM 42 and the RAM 45 in advance. However, the contents of the RAM 45 change irregularly every moment, and the contents match the ROM 15. It is almost impossible to prepare the ROM 45 in advance, and tampering can be easily found by discriminating the mismatch between the two.

  Further, the CPU 11 provided in the sub-control unit 82 determines whether or not they match. However, if the program for determining is stored in the ROM 12 provided in the sub-control unit 82 from the beginning, the function of determining mismatch is not used. In this way, it is impossible to tamper with the ROM 42 because a structure is employed in which a third party cannot easily touch the sub-control unit 82.

  Furthermore, no matter how the main control unit 81 is tampered with, the function of the sub-control unit 82 can detect the tampering of the main control unit 81 quickly and reliably, so there is no need to pay attention to the security of the main control unit 81. In addition, it is possible to quickly and easily change the game rules, change the winning probability of the feature, and so-called software bug countermeasures, and quickly provide the gaming machine 1 that does not bore the player.

  Furthermore, if the hopper control program related to security is stored in the ROM 12 of the sub-control unit 82, the sub-control unit 82 controls the hopper that pays out the game medium that gives the player a final benefit. No matter how the ROM 42 of the main control unit 81 is modified, it is possible to provide a high-security gaming machine that does not pay out game media unless the verification data from the RAM 15 and the verification data from the RAM 45 match.

1 is a perspective view of a gaming machine 1 according to an embodiment. It is a block diagram of the circuit part of game machine 1 concerning an embodiment. It is a flowchart of coincidence mismatch judgment of the main control unit. It is a flowchart of the coincidence / mismatch judgment of the sub-control unit. 5 is a flowchart of interrupt control for coincidence / mismatch judgment of the main control unit. It is a flowchart of interruption control of coincidence / mismatch judgment of a sub-control unit.

Explanation of symbols

1 Pachi-slot machine 10 Microcomputer 11 CPU
12 ROM
13 RAM
15 Nonvolatile RAM
40 Microcomputer 41 CPU
42 ROM
43 RAM
45 Nonvolatile RAM

Claims (3)

ROM storing game fixed information including a game program, at least a first RAM coupled to the ROM so as to be difficult to separate, and a first central processing means for sequentially processing a game procedure based on the game program; A main control unit comprising:
Based on a control command from the first central processing means, the second central processing means for performing output control of various display means and the like, and a sub-control unit that is always energized and provided with a second RAM,
The second central processing means extracts verification data and stores the verification data in the first RAM and the second RAM,
It is detected whether or not the verification data stored in the first RAM and the second RAM match each other, and if both do not match, the ROM of the main control unit is not a regular ROM A game machine characterized by determining and outputting a mismatch signal. The gaming machine according to claim 1, wherein the verification data is a ROM identification number assigned to each ROM. The gaming machine according to claim 1 or 2, wherein the collation data changes with the passage of time.

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