JP5067966B2 - One-chip microcomputer for gaming machine and gaming machine - Google Patents

Description

  The present invention includes a unidirectional command receiving device that receives a command in one direction from a gaming machine control board, and a one-chip microcomputer for a gaming machine that is used in a gaming machine that performs a predetermined game progression, and a gaming machine that controls the gaming machine control board The present invention relates to a gaming machine that includes a unidirectional command receiving device that receives commands in a unidirectional manner from a one-chip microcomputer.

  A gaming machine such as a pachinko machine or a slot machine is usually equipped with a one-chip microcomputer for a gaming machine (hereinafter referred to as a one-chip CPU for a gaming machine) incorporating a ROM storing a game control program or the like. It is controlled by the machine control board.

  The game control program stored in the gaming machine one-chip CPU is a program in which a predetermined inspection organization has tested that the operation of the gaming machine satisfies legal requirements. The program which does not pass is devised so that it may not work. Even if the gaming machine one-chip CPU itself is counterfeited, an ID is assigned to each legitimate gaming machine one-chip CPU so that it can be easily found to be a counterfeit CPU. Authenticity can be judged.

  However, in spite of these contrivances, while the regular one-chip CPU for gaming machines is mounted on the gaming machine control board, another illegal CPU is mounted on the same board, and the counterfeit CPU is used to make a substantial gaming machine. When a fraudulent control is performed, an inspection device such as an ID reader reads an appropriate ID from a legitimate gaming machine one-chip CPU, and therefore the inspection result that the gaming machine is appropriate, In some cases, fraud in which gaming machine control by a counterfeit CPU is performed cannot be accurately detected.

  In order to deal with such injustices, the gaming machine control board or a device connected to the gaming machine performs mutual communication with the gaming machine one-chip CPU, so that the CPU that actually controls the gaming machine is a regular one. A technique has been proposed in which the operation is stopped when it is determined whether it is a counterfeit CPU or not (for example, see Patent Document 1).

JP 2002-253825 A

  However, in the invention described in Patent Document 1, the external device that determines authenticity by mutual communication is an apparatus manufactured by a manufacturer different from the gaming machine manufacturer, and is a facility of the game hall. Considering that there are a plurality of manufacturers, it is virtually impossible to simultaneously introduce a counterfeit CPU determination system having such a structure.

  Turning to the inside of the gaming machine, it is only the ball payout control board that is allowed to communicate with the gaming machine control board, and other controlled devices are unidirectional from the gaming machine control board. Since this is a unidirectional command receiving device that receives commands, it cannot be said that the method of authenticating the one-chip CPU for gaming machines by authentication by mutual communication can be effectively applied.

  Accordingly, the present invention provides a gaming machine one equipped with a command transmission function capable of determining the authenticity of a one-chip CPU for gaming machines by a unidirectional command receiving device including various important devices for performing gaming in gaming machines. An object of the present invention is to provide a gaming machine including a chip microcomputer and a gaming machine control board on which the gaming machine one-chip microcomputer is mounted.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a unidirectional command receiving device that receives a command in one direction from a gaming machine control board, and is used for a gaming machine that performs a predetermined game progression. In the chip microcomputer, a binary operation that satisfies the combination rule for all the numerical values in the authentication numerical area by preliminarily setting the numerical value area for authentication in the storage area for fixedly storing the program for performing the game control When a command is sent to a unidirectional command receiver that pre-stores an authentication code obtained by performing a half-group operation defined as By adding a split authentication code generated by performing a semi-group operation for each divided block divided into blocks and sending it to the command, Wherein the result of the semigroup operation unidirectional command receiving device that receives all the pressure has been divided authentication code allows determining whether matches the authentication code stored in advance.

  Further, in the invention according to claim 2, in the one-chip microcomputer for gaming machine according to claim 1, when there are a plurality of unidirectional command receivers that store the authentication code, divided authentication is performed for each command transmission destination. A code is generated, and one set of divided authentication codes is transmitted to each unidirectional command receiver.

  The invention according to claim 3 is a one-way microcomputer for a gaming machine according to claim 1 or 2 based on the fact that a predetermined condition for changing the number of block divisions is achieved. The number of division authentication codes to be added to a command transmitted to the command receiving device is changed.

  According to a fourth aspect of the present invention, in the one-chip microcomputer for a gaming machine according to any one of the first to third aspects, any one of a plurality of half-group operations can be performed by a predetermined selection method. A split authentication code is generated by selecting these.

  In order to solve the above-mentioned problem, the invention according to claim 5 is provided with a unidirectional command receiving device that receives a command in one direction from a one-chip microcomputer for a gaming machine on a gaming machine control board, and performs a predetermined game progress. In the gaming machine to perform, the one-chip microcomputer for the gaming machine has a storage area for permanently storing a program for performing game control, and all numerical values in the authentication numerical area preset in the storage area. On the other hand, a semi-group operation execution means capable of executing a semi-group operation defined as a binary operation satisfying the coupling rule, and a semi-group operation for each divided block obtained by irregularly dividing the numerical value area for authentication into a plurality of blocks A split authentication code generating means, and a frame for transmitting the split authentication code generated by the split authentication code generating means in addition to a command to the unidirectional command receiving device The unidirectional command receiving device stores in advance an authentication code obtained by performing a semi-group operation on all values included in the authentication numerical area in the one-chip microcomputer for gaming machines Based on whether or not a result obtained by performing the semi-group operation for one set of the divided authentication code added to the command from the one-chip microcomputer for the gaming machine matches the authentication code And determining means for determining the authenticity of the one-chip microcomputer for gaming machines.

  The invention according to claim 6 is the gaming machine according to claim 5, comprising a plurality of unidirectional command receiving devices having the authentication code storing means and the determining means, and the one-chip microcomputer for gaming machines The divided authentication code generating means generates a divided authentication code for each command transmission destination, and the command transmitting means transmits one set of divided authentication codes to each unidirectional command receiving device. To do.

  The invention according to claim 7 is the gaming machine according to claim 5 or 6, wherein the division authentication code generating means of the one-chip microcomputer for gaming machine is a predetermined block division number changing condition. Is achieved, the number of divisions of the division authentication code added to the command to be transmitted to the unidirectional command receiving device is changed.

  The invention according to claim 8 is the gaming machine according to claim 7, wherein the divided authentication code generating means of the one-chip microcomputer for gaming machine is an upper limit of the number of blocks that can divide the numerical value area for authentication. A division authentication code is generated within a range not exceeding the division upper limit number, which is a value, and the determination means of the unidirectional command receiving device authenticates the result of the semi-group calculation of the division authentication codes for the division upper limit number received continuously. The one-chip microcomputer for gaming machines is determined to be a game by not matching the code.

  The invention according to claim 9 is the gaming machine according to any one of claims 5 to 8, wherein the divided authentication code generating means of the one-chip microcomputer for gaming machine is predetermined. According to the selection method, one of a plurality of semi-group operations is selected to generate a divided authentication code, and the command transmission means of the one-chip microcomputer for gaming machines is configured to generate the divided authentication code. The semi-group operation specifying information for specifying the semi-group operation used in the command is included in the command and transmitted to the unidirectional command receiving apparatus, and the authentication code storage means of the unidirectional command receiving apparatus is selected by the divided authentication code generating means A plurality of authentication codes respectively corresponding to possible half-group operations are stored, and the determination means of the unidirectional command receiving device includes the half-group operation identification information included in the received command The semi-group operation to be executed can be switched accordingly, and the result of performing the semi-group operation with one set of divided authentication codes matches the authentication code corresponding to the semi-group operation specified by the semi-group operation identification information The authenticity of the one-chip microcomputer for gaming machines is determined based on whether or not.

  According to the one-chip microcomputer for a gaming machine according to claim 1, the authentication numerical area is preset in the storage area for storing the program for performing the game control in a fixed manner, When a command is sent to a unidirectional command receiving device that stores in advance an authentication code obtained by performing a semi-group operation defined as a binary operation satisfying the coupling rule for numerical values with all numerical values included in the numerical value area for authentication By adding the divided authentication code generated by performing the semi-group operation for each divided block that randomly divides the numerical value area for authentication into a plurality of blocks, the command is added to each of the plurality of consecutive commands. Since it was possible to determine whether the result of the half-group operation performed by the unidirectional command receiver that received all the divided authentication codes matches the authentication code stored in advance. Since the split authentication code transmitted from the one-chip microcomputer for gaming machines to the unidirectional command receiving device has an unpredictable variable value, it is difficult for a malicious third party to decode the split authentication code, and the counterfeit CPU Suitable for countermeasures.

  According to the one-chip microcomputer for a gaming machine according to claim 2, when there are a plurality of unidirectional command receivers that store the authentication code, a divided authentication code is generated for each command transmission destination, Since the split authentication code is transmitted to each unidirectional command receiver, the authenticity of the one-chip microcomputer for gaming machines can be individually determined by a plurality of unidirectional command receivers, and counterfeit CPU measures Reliability can be further increased.

  According to the one-chip microcomputer for a gaming machine according to claim 3, the division authentication code to be added to the command transmitted to the unidirectional command receiving device based on the achievement of the predetermined block division number change condition. Since the number of divisions is changed, analysis of the division authentication code becomes more difficult, and extremely high security can be ensured.

  According to the gaming machine according to claim 4, since the split authentication code is generated by selecting any of the plurality of half-group operations by a predetermined selection method, it becomes more difficult to analyze the split authentication code. Can guarantee extremely high security.

  According to the gaming machine according to claim 5, the one-chip microcomputer for gaming machine includes a storage area for storing a program for performing game control in a fixed manner, and a preset authentication area in the storage area. A semi-group operation execution means capable of executing a semi-group operation defined as a binary operation satisfying the coupling rule for all numerical values in the numerical area, and for each divided block that irregularly divides the numerical value area for authentication into a plurality of blocks A split authentication code generating means for performing a semi-group operation; and a command transmitting means for transmitting the split authentication code generated by the split authentication code generating means in addition to a command to the unidirectional command receiving device, The unidirectional command receiver is an authentication obtained by performing a semi-group operation on all values included in the numerical value area for authentication in the one-chip microcomputer for gaming machines. Whether the result of the semi-group operation for one set of the authentication code storage means for storing the code in advance and the divided authentication code added to the command from the one-chip microcomputer for the gaming machine matches the authentication code Determination means for determining the authenticity of the one-chip microcomputer for gaming machines based on whether or not the split authentication code transmitted from the one-chip microcomputer for gaming machines to the unidirectional command receiving device is predicted Since it is an impossible variable value, it is difficult for a malicious third party to decode the divided authentication code, which is suitable for counterfeit CPU measures.

  According to the gaming machine according to claim 6, the gaming machine includes a plurality of unidirectional command receiving devices each having the authentication code storage unit and the determination unit, and the divided authentication code generation unit of the one-chip microcomputer for gaming machine includes command transmission A split authentication code is generated for each destination, and the command transmitting means transmits a set of split authentication codes to each unidirectional command receiving device, so that a plurality of unidirectional command receiving devices individually The authenticity of the one-chip microcomputer can be determined, and the reliability of the counterfeit CPU can be further improved.

  According to the gaming machine according to claim 7, the division authentication code generating means of the one-chip microcomputer for gaming machine is a unidirectional command receiving device based on the fact that a predetermined block division number changing condition is achieved. Since the number of division authentication codes added to the command to be transmitted is changed, it becomes more difficult to analyze the division authentication code, and extremely high security can be ensured.

  According to the gaming machine according to claim 8, the division authentication code generation means of the one-chip microcomputer for gaming machine is a range not exceeding the division upper limit number that is the upper limit value of the number of blocks that can divide the numerical value area for authentication. And the determination means of the unidirectional command receiving device uses a semi-group calculation result of the division authentication codes for the upper limit number of divisions received continuously, and does not match the authentication code. Since the one-chip microcomputer is determined to be a fake, even if the unidirectional command receiving device continues to receive the incorrect divided authentication code from the gaming machine control board that has been replaced with a counterfeit CPU, If an appropriate number of division authentication codes are received, the authenticity of the one-chip microcomputer for gaming machines can be accurately determined.

  According to the gaming machine of claim 9, the divided authentication code generating means of the one-chip microcomputer for gaming machine selects any one of a plurality of half-group operations by a predetermined selection method. The command transmission means of the one-chip microcomputer for gaming machines includes semi-group operation specifying information for specifying the half-group operation used by the divided authentication code generating means for generating the divided authentication code in the command. The authentication code storing means of the unidirectional command receiving apparatus stores a plurality of authentication codes respectively corresponding to semigroup operations that can be selected by the divided authentication code generating means. The determination means of the direction command receiving device can switch the semi-group operation to be executed according to the semi-group operation specifying information included in the received command. Determine the authenticity of the one-chip microcomputer for gaming machines based on whether the result of the semi-group operation with the authentication code matches the authentication code corresponding to the half-group operation specified by the semi-group operation identification information As a result, analysis of the split authentication code becomes more difficult, and extremely high security can be ensured.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1A shows a simplified configuration of a gaming machine P according to the present invention (for example, a pachinko machine capable of playing a ball by playing a game ball). A game machine control board 1 equipped with a simple one-chip CPU is used to control various devices and devices to advance the game.

  The devices controlled by the gaming machine control board 1 include various game devices such as a grand prize opening device and a variable prize device, a launch control device for controlling the launch of a game ball, and a ball for paying out a prize ball to a player. Although various devices such as a discharge control device are provided, in this figure, only the liquid crystal display device 2, the sound control device 3, and the LED control device 4 are used as devices capable of determining the authenticity of the one-chip CPU 11. Indicated. Each of the liquid crystal display device 2, the sound control device 3, and the LED control device 4 is a unidirectional command receiving device that receives a unidirectional command from the one-chip CPU 11 and executes an operation according to the received command. In some cases, an effect control device that handles display effects, sound effects, and the like is used as a unidirectional command receiving device, and the operation control of the liquid crystal display device, various LEDs, and speakers is performed by the effect control device.

  The one-chip CPU 11 is obtained by integrating a CPU core, ROM, RAM, and the like into a one-chip IC, and is given a unique ID (unique identification information). If an inspection device is connected via the inspection terminal 12 provided on the gaming machine control board 1, the ID of the one-chip CPU 11 can be read and the authenticity of the one-chip CPU 11 can be inspected. Further, when a command is transmitted from the one-chip CPU 11 to the liquid crystal display device 2, the sound control device 3, and the LED control device 4, a division authentication code (detailed later) is added and transmitted.

  The liquid crystal display device 2 is a relatively large display device, and various display effects on the game (for example, the identification information consisting of numbers and symbols is variably displayed on the three-digit variable display portion, and then stopped and stopped. This is a device that operates relatively frequently in response to a command from the one-chip CPU 11. The liquid crystal display device 2 includes an authentication code storage unit 21 that stores and holds an authentication code (detailed later), an authentication code stored in the authentication code storage unit 21, and a divided authentication code received from the one-chip CPU 11. The determination means 22 which uses and determines the authenticity of the one-chip CPU 11 is provided.

  The sound control device 3 is a control device that operates the speaker of the gaming machine P to output various sounds and sound effects, and is a device that operates relatively frequently in response to a command from the one-chip CPU 11. . The sound control device 3 uses an authentication code storage means 31 for storing and holding an authentication code, an authentication code stored in the authentication code storage means 31 and a divided authentication code received from the one-chip CPU 11. Determination means 32 for determining the authenticity of the

  The LED control device 4 is a control device that activates various display lamps and LEDs of the gaming machine P to produce a light emission effect, and is a device that operates relatively frequently in response to a command from the one-chip CPU 11. The LED control device 4 uses an authentication code storage means 41 for storing and holding an authentication code, an authentication code stored in the authentication code storage means 41 and a divided authentication code received from the one-chip CPU 11. The determination means 42 which determines authenticity of is provided.

  FIG. 1B shows connections when a special one-chip CPU 11 F is mounted on the gaming machine control board 1. The regular one-chip CPU 11 and the liquid crystal display device 2, the sound control device 3, and the LED control device 4. Is disconnected, and the one-chip CPU 11F of the game is connected to the liquid crystal display device 2, the sound control device 3, and the LED control device 4, and the one-chip CPU 11F of the gift substantially controls the gaming machine P.

  Even if the inspection device 12 inspects the inspection device 12 via the inspection terminal 12 of the gaming machine control board 1 on which the special one-chip CPU 11F is mounted, the inspection target is the regular one-chip CPU 11, so the special one-chip CPU 11F It is not possible to detect fraud that causes the game control to be performed substantially. Such fraud is called “spoofing”.

  However, in the gaming machine P according to the present embodiment, only the command is transmitted from the one-chip CPU 11F of the gift to the liquid crystal display device 2, the voice control device 3, and the LED control device 4, and an appropriate division authentication code is transmitted. Therefore, the determination means 22 of the liquid crystal display device 2 determines that the one-chip CPU 11F is a food, the determination means 32 of the sound control device 3 determines that the one-chip CPU 11F is a food, and the determination means 42 of the LED control device 4 determines the one-chip. CPU11F will be determined as a thing. The liquid crystal display device 2, the audio control device 3, and the LED control device 4 that have determined that the one-chip CPU 11F is a product do not execute, for example, a command from the one-chip CPU 11F of the product, and indicate that an “impersonation” fraud has occurred on the liquid crystal screen. Displaying, notifying by voice, or notifying the alert state by blinking various LEDs.

  That is, in the gaming machine P according to the present embodiment, the one-chip CPU 11 has a storage area (ROM) in which a program for performing game control is fixedly stored, and an authentication numerical area preset in the storage area. A semi-group operation execution means (CPU core) capable of executing a semi-group operation defined as a binary operation satisfying the coupling rule for all the numerical values of and a divided block that irregularly divides the numerical value area for authentication into a plurality of blocks A split authentication code generating means (CPU core) that performs a semi-group operation every time, and a command transmitting means for transmitting the split authentication code generated by the split authentication code generating means in addition to a command to the unidirectional command receiving device ( For example, a CPU core and an interface circuit) are provided, and the liquid crystal display device 2, the sound control device 3, and the LED control device 4, which are unidirectional command receiving devices, The authentication code storage means (21, 31, 41) for storing in advance an authentication code obtained by performing a semi-group operation on all the values included in the authentication numerical value area in the CPU 11 and added to the command from the one-chip CPU 11 Determination means (22, 32, 42) is provided for determining the authenticity of the one-chip CPU 11 based on whether or not the result of the half-group operation performed for one set of the divided authentication codes matches the authentication code. In this way, “spoofing” fraud can be effectively prevented.

  Here, an authentication method that can be realized by a genuine one-chip CPU and a liquid crystal display device 2, an audio control device 3, and an LED control device 4 that are unidirectional command receiving devices will be described in detail.

  FIG. 2A illustrates an example of a command transmitted from the gaming machine control board 1 to the liquid crystal display device 2. This is a 1-byte command, and the upper 4 bits (bit strings 7 to 4) are used for specifying the drawing position, and the lower 4 bits (bit strings 3 to 0) are used for specifying the drawing contents. That is, when the gaming machine control board 1 transmits 11h data to the liquid crystal display device 2, this is a command for displaying “1” on the left symbol. When the gaming machine control board 1 transmits 22h data to the liquid crystal display device 2, this is a command for displaying “2” on the middle symbol. When the gaming machine control board 1 transmits 33h data to the liquid crystal display device 2, this is a command for displaying “3” on the right symbol. Note that one variable display game is executed by instructing the liquid crystal display device 2 to stop the left symbol, the middle symbol, and the right symbol.

  Since communication between the gaming machine control board 1 and the liquid crystal display device 2 can be measured with an oscilloscope or the like, such a simple command system can be easily analyzed. It is easy to imitate a send command. For a liquid crystal display device that does not include the authentication code storage means 21 and the determination means 22, it is impossible to distinguish between a signal from the regular one-chip CPU 11 and a signal from the one-chip CPU 11F.

  Therefore, as shown in FIG. 2 (b1), a program specific code of 1 byte length is written in the command transmitted from the gaming machine control board 1 to the liquid crystal display device 2 (one-chip CPU 11 mounted on the gaming machine control board 1). An example of communication in the case of adding an authentication code that can identify a specified program is shown.

  As shown in FIG. 2 (b1), when the gaming machine control board 1 transmits data 11h, 56h to the liquid crystal display device 2, this is a program specific code together with a command for displaying “1” on the left symbol. (56h) is transmitted, and the authenticity of the one-chip CPU 11 is confirmed by checking whether or not this program identification code matches the authentication code stored in the authentication code storage means 21 of the liquid crystal display device 2. Can be judged. Further, as shown in FIG. 2 (b2), when the data “11h” is transmitted from the gaming machine control board 1 and the program specific code is not added, the gaming machine control board 1 is equipped with a one-chip CPU 11F as a special item. Can be determined.

  As shown in FIG. 2 (b1), when the gaming machine control board 1 transmits data 22h, 56h to the liquid crystal display device 2, this is a program specific code together with a command for displaying “2” in the middle symbol. (56h) is transmitted, and the authenticity of the one-chip CPU 11 is confirmed by checking whether or not this program identification code matches the authentication code stored in the authentication code storage means 21 of the liquid crystal display device 2. Can be judged. Further, as shown in FIG. 2 (b2), when the data 22h, 45h is transmitted from the gaming machine control board 1, it is different from the authentication code 56h stored in the authentication code storage means 21, so that the gaming machine It can be determined that a special one-chip CPU 11F is mounted on the control board 1.

  As shown in FIG. 2 (b1), when the gaming machine control board 1 transmits data of 33h, 56h to the liquid crystal display device 2, this is a program specific code together with a command for displaying “3” on the right symbol. (56h) is transmitted, and the authenticity of the one-chip CPU 11 is confirmed by checking whether or not this program identification code matches the authentication code stored in the authentication code storage means 21 of the liquid crystal display device 2. Can be judged. Further, as shown in FIG. 2 (b2), if the data of 33h, 56h is transmitted from the gaming machine control board 1 and the authentication code stored in the authentication code storage means 21 is 56h, they coincide with each other. Therefore, it can be determined that the program identification code received from the gaming machine control board 1 is appropriate, and that the genuine one-chip CPU 11 is mounted on the gaming machine control board 1.

  However, when the above-mentioned program identification code is used as the authentication code, the program identification code is a value fixed by the program of the one-chip CPU 11, and therefore the authentication code can be easily analyzed and analyzed by measuring with an oscilloscope or the like. If a special one-chip CPU 11F that transmits an authentication code added to a program is used, it is not possible to determine whether the “spoofing” is illegal.

  Therefore, in the gaming machine P according to the present embodiment, the authentication code is prevented from being analyzed by not transmitting the authentication code from the gaming machine control board 1 to the liquid crystal display device 2. Specifically, the divided program identification code obtained by dividing the program identification code into a plurality of divided authentication codes as a divided authentication code is transmitted, and the program identification is performed in the liquid crystal display device 2 that has received one set of divided program identification codes. The authenticity of the one-chip CPU 11 is determined by reproducing the code and checking whether the reproduced program identification code matches the program identification code stored in advance.

  For example, as shown in FIG. 2 (c), when 11h, 1Fh data is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, it is divided together with a command for displaying “1” on the left symbol. When the program specific code (1Fh) is received, and subsequently, data 22h, 3Fh is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, a command for displaying “2” on the middle symbol; At the same time, the division program specifying code (3Fh) is received, and when the data 33h, 36h is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, "3" is displayed in the right pattern. The divided program specifying code (36h) is received together with the command to be executed.

  In the liquid crystal display device 2 that has received these divided program identification codes (1Fh, 3Fh, 36h), for example, if the number of divisions of the program identification code is set to “3” in advance, one set of divided programs Since it can be determined that the specific code has been received, the program specific code is reproduced and stored in the authentication code storage means 21 by performing a predetermined operation (detailed later) with the three divided program specific codes held. The authenticity of the one-chip CPU 11 can be determined by checking whether or not it matches the authentication code.

  In this way, even if the signal from the gaming machine control board 1 to the unidirectional command receiving device such as the liquid crystal display device 2 is analyzed, the program specific code used for the actual authentication is not known, and the one-chip CPU 11F is a special one It is very difficult to forge and “spoof” fraud. In addition, each time the genuine one-chip CPU 11 generates the divided program identification code, the setting is made so that irregular division is performed (for example, randomness such as a random value used internally in the gaming machine P is changed to block division). If it is reflected, the value of the divided program specific code added to the command also exhibits an irregular change that cannot be predicted, so that the analysis of the program specific code can be made more difficult.

  Note that the number of divisions of the program specific code is not particularly limited, and may be divided into two or four or more. Further, the method for determining that the liquid crystal display device 2 has received one set of divided program identification codes is not particularly limited, and the last divided program identification code of one set is added to the command from the gaming machine control board 1. An indicator indicating that it is attached may be included.

  Next, a calculation method of the program specifying code as the authentication code and the divided program specifying code as the divided authentication code will be described with reference to FIG.

  Here, “◎” represents a binary operator that satisfies the combining law. That is, “aａ (b ◎ c) = (a ◎ b) ◎ c” holds. Since a defined set of binary operations that satisfy the combining rule is generally called a semigroup, such a binary operation is called a semigroup operation. Semi-group operations include addition, multiplication, etc. In the following description, exclusive OR is employed as a semi-group operation to generate a divided program specific code and a unidirectional command receiver (liquid crystal display) in the one-chip CPU 11. In the generation of the specific program code in the apparatus 2 or the like, exclusive OR is performed as a semi-group operation.

  Further, the specific program code in the one-chip CPU 11 is generated based on the storage contents of the ROM, which is a storage area for permanently storing a program for performing game control. The entire area storing the game control program may be set as the numerical value area for authentication, or only a specific range among them may be set as the numerical value area for authentication. In any case, an authentication numerical value area may be set for a numerical value area that is never changed when the regular one-chip CPU 11 performs appropriate game control.

  Here, the addresses from address 00h to 0Fh in the ROM are set as the range of the numerical value area for authentication, and 12h, 57h, 9Ah, C0h, EDh, 0Bh, 30h, It is assumed that 16-byte data of 77h, 82h, 1Ch, 00h, 64h, 3Ah, 01h, 33h, and 5Ah is written. Then, a value obtained by performing the semi-group operation on all the numerical values included in the numerical value area for authentication of the ROM is set as a program specifying code. That is, “12h ◎ 57h ◎ 9Ah ◎ C0h ◎ EDh ◎ 0Bh ◎ 30h ◎ 77h ◎ 82h ◎ 1Ch ◎ 00h ◎ 64h ◎ 3Ah ◎ 01h ◎ 33h ◎ 5Ah = 16h". The specific code is 16h.

  Subsequently, as shown in FIG. 3A, the ROM numerical value area is divided into three blocks of 4 bytes, 7 bytes, and 5 bytes, and the numerical areas of the first to third blocks are divided into half. A group operation shall be performed. The first block is “12h ◎ 57h ◎ 9Ah ◎ C0h = 1Fh”. The second block is “EDh ◎ 0Bh ◎ 30h ◎ 77h ◎ 82h ◎ 1Ch ◎ 00h = 3Fh”. The third block is “64h ◎ 3Ah ◎ 01h ◎ 33h ◎ 5Ah = 36h”. The value obtained for each of the first to third blocks is the divided program specifying code, and after the divided program specifying code is generated, the divided program specifying code generated from the first block is the first command to be sent to the unidirectional program receiving device. Is added, and the divided program specifying code generated from the second block is added to the command to be subsequently sent, and the divided program specifying code generated from the third block is added to the command to be subsequently sent.

  Therefore, when the semi-group operation is performed on the divided program specific code generated from each of the three divided blocks, the relationship that the program specific code matches with the definition of the semi-group operation is established. In the example of the divided program identification code of each of the first to third blocks, “1Fh ◎ 3Fhｈ36h = 16h”, which matches the program identification code 16h.

  That is, in a unidirectional command receiving apparatus that has received one set of divided program identification codes, if these are subjected to a semi-group operation, a program identification code obtained by performing a semi-group operation on all values in the numerical value area for authentication in one-chip CPU 11 is reproduced. By comparing with the program identification code stored in the authentication code storage means in advance as an appropriate program identification code of the genuine one-chip CPU 11 that receives the command, it is possible to divide one set transmitted from the one-chip CPU 11 The suitability of the program specific code can be determined, and the determination result is the authenticity determination of the one-chip CPU 11 mounted on the gaming machine control board 1.

  In addition, there is no particular limitation on the block division for specifying the range for generating the divided program identification code. By appropriately selecting the number of bytes and the number of block division for each block, the value of the divided program identification code can be varied. Change. No matter what kind of block division is performed, when a semi-group operation is performed on one set of divided program specific codes, a relationship that matches the program specific codes is established.

  For example, as shown in FIG. 3B, the numerical value area for authentication of the ROM is divided into 4 blocks of 5 bytes, 3 bytes, 6 bytes, and 2 bytes, and the numerical areas of the first to fourth blocks are as follows. A half-group operation shall be performed. The first block is “12h ◎ 57h ◎ 9Ah ◎ C0h ◎ EDh = F2h”. The second block is “0Bh ◎ 30h ◎ 77h = 4Ch”. The third block is “82h ◎ 1Ch ◎ 00h ◎ 64h ◎ 3Ah ◎ 01h = C1h”. The fourth block is “33h ◎ 5Ah = 69h”. When a half-group operation is performed with the divided program identification codes of each of the first to fourth blocks, “F2hＣ4Ch１C1hｈ69h = 16h” is obtained, and it can be confirmed that it matches the program identification code 16h.

  Next, the flow of authentication by command transmission from the gaming machine control board 1 including the genuine one-chip CPU 11 to the liquid crystal display device 2 which is an example of the unidirectional command receiving device will be described in detail with reference to FIG.

  FIG. 4 shows an example of commands and divided program specifying codes transmitted from the gaming machine control board 1 to the liquid crystal display device 2. This transmits a 1-byte length command (the upper 4 bits are used to specify the drawing position and the lower 4 bits are used to specify the drawing content) and a 1-byte long divided program specifying code.

  When the one-chip CPU 11 of the gaming machine control board 1 adds a divided program specifying code to a command to the liquid crystal display device 2, first, a divided program specifying code to be added is generated. The conditions for generating the divided program identification code are not particularly limited. For example, the divided program identification code to be added to the command to the liquid crystal display device 2 at the time of various settings after starting (or after resetting) the gaming machine P is previously stored. It may be generated or may be generated when command transmission is performed. Also, as soon as one set of divided program identification codes has been sent, the next divided program identification code may be generated, or may be generated when the next command is transmitted.

  In FIG. 4, the block is divided into three blocks of 4 bytes, 7 bytes, and 5 bytes, the divided program specifying code “1Fh” from the first block, the divided program specifying code “3Fh” from the second block, and the divided from the third block Program specific codes “36h” are respectively generated and sequentially added to commands to the liquid crystal display device 2.

  When data of 11h and 1Fh is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, it means that the divided program specific code (1Fh) is received together with a command for displaying “1” on the left symbol, Subsequently, when data of 22h and 3Fh is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, a divided program specifying code (3Fh) is received together with a command for displaying “2” on the middle symbol. Then, when data B3h, 36h is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the divided program specifying code (36h) is displayed together with a command for displaying “3” on the right pattern. Will be received.

  When the one-chip CPU 11 transmits the last divided program specifying code for one set, “1” is set to bit 7 of the command (“10110011” = B3h, not “00110011” = 33h). As a result, the one-chip CPU 11 is configured to irregularly change the number of block divisions when the divided program specifying code is generated. Even if the number of divided program specifying codes for one set changes at any time, the liquid crystal display device 2 Since it is possible to identify that one set of divided program specific codes has been received, the program specific code is reproduced by a half-group operation with three divided program specific codes at the timing of receiving one set of divided program specific codes, The authenticity determination of the one-chip CPU 11 can be executed.

  As described above, when transmission of one set of divided program specifying codes to the liquid crystal display device 2 is completed, it is necessary to generate divided program specifying codes to be added to subsequent commands. When generating the division program specific code, the number of block divisions and the capacity of each block are determined at random. For example, it is divided into 4 blocks of 5 bytes, 3 bytes, 6 bytes and 2 bytes, the divided program specifying code “F2h” from the first block, the divided program specifying code “4Ch” from the second block, and the divided program from the third block A specific code “C1h” and a divided program specific code “69h” are respectively generated from the fourth block and sequentially added to the command to the liquid crystal display device 2.

  When the data 14h and F2h are transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the divided program specific code (F2h) is received together with the command for displaying “4” on the left symbol, Subsequently, when data of 25h, 4Ch is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the divided program specifying code (4Ch) is received together with a command for displaying “5” on the middle symbol. Then, when data 36h and C1h are transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the divided program specifying code (C1h) is displayed together with a command for displaying “6” on the right pattern. Will be received. Thus, one variable display game is executed in the liquid crystal display device 2, but one set of the divided program specific codes generated by dividing into four has not been transmitted to the liquid crystal display device 2 yet.

  When the next variable display game execution command is sent from the gaming machine control board 1 to the liquid crystal display device 2 with data 97h, 69h, the divided program is specified together with a command for displaying “7” on the left symbol. The code (69h) is received, and in this command, “1” is set to bit 7 indicating that the last divided program specifying code for one set is transmitted (“10010111” is not 17h but “10010111”). = 97h), the liquid crystal display device 2 can reproduce the program specific code by the half group operation with the four divided program specific codes at this timing, and execute the authenticity determination of the one-chip CPU 11.

  When it is determined from the information included in the command from the one-chip CPU 11 that the unidirectional command receiving apparatus has received one set of divided program identification codes, unless one-chip CPU 11 instructs the end of one set, Since the command from the one-chip CPU 11 is received indefinitely and the divided program specific code is continuously held, there is a possibility that the authenticity determination cannot be executed even if the “spoofing” fraud is performed. Therefore, an upper limit number of block divisions (for example, 10) is set in advance, and every time a division program identification code is received, a half group calculation is performed using all the division program identification codes held so far, and the calculated value May be determined by comparing the number of block divisions when the code matches the program specific code with the upper limit number of block divisions.

  For example, when the liquid crystal display device 2 receives “1Fh” as the division program identification code by the first block, “3Fh” as the division program identification code by the second block, and “36h” as the division program identification code by the third block When each half-group operation is received, the first block is 1Fh, the operation value in the second block is 20h, the operation value in the third block is 16h, the program specific code stored in advance and the third block Match. Since this is 10 or less, which is the upper limit value of block division, it can be determined as normal.

  In addition, when performing a semi-group operation with all received divided program identification codes and determining a match with the program identification code, the half-group operation values with the division program identification code are matched with the program identification code stored in advance. Since there is a possibility that 11 or more divided program specific codes may be received, if the result of the semi-group operation of the divided program specific codes corresponding to the upper limit number of divisions (10 blocks) does not match the specific program specific code, You may judge it abnormal at that time.

  As described above, according to the gaming machine P according to the present embodiment, the divided program identification code transmitted from the one-chip CPU 11 to the unidirectional command receiving device such as the variable display device 2 has an unpredictable variable value. Therefore, it is difficult for a malicious third party to decipher the divided program specific code, which is suitable for counterfeit CPUs. In addition, by appropriately changing the block division, it is possible to variously change the division program specifying code that appears in the communication from the CPU 11 to the liquid crystal display device 2 or the like. For example, if the number of block divisions is changed by a random number, it is possible to prevent the division program specific code from repeating the same pattern, and spoofing fraud becomes more difficult. Even if the block division is changed in this way, the program identification code used for the determination is always constant, so that the burden of the determination process performed by the unidirectional command receiving device such as the liquid crystal display device 2 does not increase.

  Further, if the half group operation used for generating the divided program specific code to be transmitted from the one-chip CPU 11 to the unidirectional command receiving device such as the variable display device 2 is appropriately changed and used, the impersonation fraud becomes more difficult. It is possible. In order to do so, a plurality of half-group operations that can be selected by the one-chip CPU 11 are stored in advance, and a plurality of half-group operations are similarly stored in advance on the unidirectional command receiving apparatus side that receives them. A plurality of authentication codes respectively corresponding to the half group operations are also stored in advance.

  For example, “X ◎ Y = X and Y exclusive OR” is a half-group operation A, and “X * Y = X + Y lower 8 bits” is a half-group operation B. These two types of half-group operations An example of a unidirectional command receiving apparatus when the one-chip CPU 11 generates a divided program specifying code by appropriately switching between A and B, adds the divided program specifying code to a command, and transmits it to the unidirectional command receiving apparatus. The flow of authentication in the liquid crystal display device 2 will be specifically described.

  First, as shown in FIG. 5, when the half-group operation B is applied to the ROM numerical value area (address 00h to 0Fh), “12h * 57h * 9Ah * C0h * EDh * 0Bh * 30h * 77h * 82h Since * 1Ch * 00h * 64h * 3Ah * 01h * 33h * 5Ah = 2Ch ", the program specific code when using this half-group operation B is 2Ch.

  Subsequently, it is assumed that the numerical value area for authentication in the ROM is divided into three blocks of 4 bytes, 7 bytes, and 5 bytes, and the half group operation B is performed on the numerical areas of the first to third blocks. The first block is “12h * 57h * 9Ah * C0h = C3h”. The second block is “EDh * 0Bh * 30h * 77h * 82h * 1Ch * 00h = 3Dh”. The third block is “64h * 3Ah * 01h * 33h * 5Ah = 2Ch”. Then, when the half group operation B is performed with the divided program specifying codes of the first to third blocks, “C3h * 3Dh * 2Ch = 2Ch”, which matches the program specifying code 2Ch.

  That is, in the unidirectional command receiving device that has received one set of divided program specific codes, does the half group operation used to generate the divided program specific codes, and matches the program specific code corresponding to the half group operation? If it is determined whether or not, the authenticity determination of the one-chip CPU 11 mounted on the gaming machine control board 1 can be performed.

  Note that the selection method for selecting which one of the plurality of half-group operations to generate the divided program specific code by the one-chip CPU 11 is not particularly limited, and a common half-group operation selection table is used. Although the one-chip CPU 11 and the unidirectional command receiving device may have the same and change the order of change of the semi-group operation with reference to the semi-group operation selection table, in this embodiment, the divided program specifying code is used. The command to be added includes semi-group operation specifying information that can specify the semi-group operation used to generate the divided program specifying code.

  In FIG. 6, the one-chip CPU 11 of the gaming machine control board 1 divides into three blocks of 4 bytes, 7 bytes, and 5 bytes and uses the semi-group operation A, so that the divided program specifying code from the first block “1Fh”, a divided program specifying code “3Fh” from the second block, and a divided program specifying code “36h” from the third block are generated and sequentially added to the command to the liquid crystal display device 2. The one-chip CPU 11 designates the symbol position with bits 5 and 4 of the command, designates the type of half-group operation with bit 6 (for example, “0” for half-group operation A, and “1” for half-group operation B). And the transmission of the division program specific code corresponding to the last block is designated by bit 7. Of course, if 2 or more bits are assigned to the designation of the semi-group operation, three or more types of semi-group operations can be designated.

  First, when data 11h and 1Fh are transmitted from the gaming machine control board 1 to the liquid crystal display device 2, a divided program specifying code is displayed together with a command for displaying “1” on the left pattern and the designation of the half group operation A. (1Fh) has been received, and when data 22h, 3Fh is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, a command and a half-group operation for displaying “2” on the middle symbol When the divided program identification code (3Fh) is received together with the designation of A, and subsequently the data B3h, 36h is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the right pattern “ 3 ”, a semi-group operation A designation, and an instruction to end transmission of one set of divided program specifying codes (36h) So that the received.

  At the timing when the liquid crystal display device 2 receives one set of divided program identification codes, the program identification code “16h” is reproduced by performing the half group operation A (1Fh ◎ 3Fh ◎ 36h) with the three divided program identification codes. Since it matches the “16h” stored as the program specific code corresponding to the half group operation A, it can be determined that the CPU is a genuine one-chip CPU 11.

  As described above, when transmission of one set of divided program specifying codes to the liquid crystal display device 2 is completed, it is necessary to generate divided program specifying codes to be added to subsequent commands. When generating the division program specific code, the number of block divisions, the capacity of each block, and the semi-group operation to be used are determined at random. For example, when it is decided to divide into 3 blocks of 4 bytes, 7 bytes, and 5 bytes and use the half group operation B, the divided program specifying code “C3h” from the first block and the divided program specifying code “3Dh from the second block ”, The divided program identification code“ 2Ch ”is generated from the third block, and sequentially added to the command to the liquid crystal display device 2.

  When the data 54h and C3h are transmitted from the gaming machine control board 1 to the liquid crystal display device 2, the divided program identification code (C3h) is displayed together with the command for displaying “4” on the left symbol and the designation of the half-group operation B. Next, when data 65h, 3Dh is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, a command for displaying “5” on the middle symbol and the half-group operation B When the division program specifying code (3Dh) is received together with the designation, and subsequently, data of F6h, 2Ch is transmitted from the gaming machine control board 1 to the liquid crystal display device 2, "6" is displayed in the right pattern. A split program specifying code (2Ch) is received together with a command to display, a semi-group operation B designation and an instruction to end transmission of a set of split program specifying codes And thus it was.

  At the timing when the liquid crystal display device 2 receives one set of divided program specific codes, the program specific code “2Ch” is reproduced by performing half group operation B (C3h * 3Dh * 2Ch) with the three divided program specific codes. Since it matches the “2Ch” stored as the program specific code corresponding to the half-group operation B, it can be determined that the CPU is a genuine one-chip CPU 11.

  As described above, the divided authentication code generation means (CPU core) of the one-chip CPU 11 generates a divided authentication code (divided program identification code) by selecting one of a plurality of half-group operations by a predetermined selection method. The command transmission means (CPU core and interface circuit) of the one-chip CPU 11 includes the semi-group operation specifying information for specifying the half-group operation used by the divided authentication code generating means for generating the divided authentication code in the command in one direction. The authentication code storage means 21 of the liquid crystal display device 2 transmits a plurality of authentications respectively corresponding to half-group operations that can be selected by the divided authentication code generation means of the one-chip CPU 11. The code (program specific code) is stored, and the determination means 22 of the liquid crystal display device 2 performs the semi-group operation included in the received command. The semi-group operation to be executed according to the constant information can be switched, and the result of performing the semi-group operation with one set of divided authentication codes is the authentication code corresponding to the semi-group operation specified by the semi-group operation specifying information According to the gaming machine P that determines the authenticity of the one-chip CPU 11 based on whether or not they match, it is more suitable for counterfeit CPU measures.

  In the one-chip CPU 11 used in the gaming machine P of the above-described embodiment, the CPU core generates the divided program specifying code by software. However, a function of generating the divided program specifying code by hardware may be provided. . For example, in the block diagram of the one-chip CPU 11 ′ shown in FIG. 5, in addition to the RAM 11b connected to the CPU 11a via the data bus / address bus, the ROM 11c in which the game control program and the like are recorded, A calculation circuit 11d specialized for generation is provided.

  The CPU core 11a makes a calculation request to the calculation circuit 11d, such as designating a block for calculating the divided program specifying code. Receiving this, the calculation circuit 11d needs to read out data from the ROM 11c, but since the control program is stored in the ROM 11c, the CPU core 11a also reads out. Here, it is not preferable to prevent the CPU core 11a from reading the program data by reading the data by the calculation circuit 11d, because the operation timing of the gaming machine P is affected. Therefore, in order to arbitrate a data read request to the ROM 11c, a BUS arbitration circuit 11c is provided to temporarily hold a data request address from the calculation circuit 11d, and to the ROM 11c at a timing when the CPU core 11a is not accessing the ROM 11c. Then, the request address of the calculation circuit 11d is output, and the data for the calculation circuit 11d is read from the ROM 11c.

  Receiving the program data of the designated address, the calculation circuit 11d calculates a divided program identification code and returns it to the CPU core 11a as a calculation result. When the CPU core 11a adds the divided program identification code to the command and outputs it, it is transmitted to the unidirectional command receiving device (liquid crystal display device 2 etc.) to be transmitted via the interface circuit 11f.

  As described above, if the divided program specifying code is generated in hardware, the CPU core 11a can effectively use the CPU time for game progress control.

  The embodiment of the gaming machine including the one-chip microcomputer for gaming machine according to the present invention has been described in detail with reference to the accompanying drawings. However, the present invention is not limited to this, and the scope of the claims is as follows. As long as the described configuration is not changed, various equivalent techniques can be adopted and realized.

(A) is a schematic block diagram of the gaming machine according to the present invention. (B) is a schematic configuration diagram of a gaming machine in which impersonation fraud has been performed by a one-chip CPU of a gift. It is explanatory drawing of the authenticity determination method of one-chip CPU by communication from a game machine control board to a liquid crystal display device. It is explanatory drawing of the generation method of a division program specific code, and the calculation method of the program specific code by a division program specific code. It is explanatory drawing of the authenticity determination operation | movement of one-chip CPU by communication from a game machine control board to a liquid crystal display device. It is explanatory drawing of the production | generation method of the division | segmentation program specific code using the semigroup operation B, and the calculation method of the program specific code by a division | segmentation program specific code. It is explanatory drawing of the authenticity determination operation | movement of one-chip CPU by communication from the gaming machine control board which used the half group operation properly to the liquid crystal display device. It is a schematic block diagram of one-chip CPU which can produce | generate a division program specific code with hardware.

Explanation of symbols

P gaming machine 1 gaming machine control board 11 one-chip CPU
DESCRIPTION OF SYMBOLS 12 Test | inspection terminal 2 Liquid crystal display device 21 Authentication code memory | storage means 22 Judgment means 3 Voice control apparatus 31 Authentication code memory | storage means 32 Judgment means 4 LED control apparatus 41 Authentication code memory | storage means 42 Judgment means

Claims (9)

In a one-chip microcomputer for a gaming machine that is equipped with a unidirectional command receiving device that receives a command in one direction from a gaming machine control board, and that is used in a gaming machine that performs a predetermined game progression,
A semi-group operation in which a numerical value area for authentication is set in advance in a storage area that stores a program for performing game control in a fixed manner, and a binary operation satisfying the coupling rule is performed for all values in the numerical value area for authentication When a command is sent to a unidirectional command receiving device that stores in advance an authentication code obtained by performing all of the numerical values included in the authentication numerical area, a divided block that irregularly divides the authentication numerical area into a plurality of blocks A semi-group operation is performed by a unidirectional command receiver that has received all of the division authentication codes added to a plurality of consecutive commands by transmitting the division authentication code generated by performing the semi-group operation every time to the command. A one-chip microcomputer for a gaming machine, characterized in that it can be determined whether or not the result of performing a match with an authentication code stored in advance.   When there are a plurality of unidirectional command receiving devices that store the authentication code, a divided authentication code is generated for each command transmission destination, and one set of divided authentication codes is transmitted to each unidirectional command receiving device. The one-chip microcomputer for a gaming machine according to claim 1, characterized in that:   2. The division number of a division authentication code added to a command transmitted to a unidirectional command receiving device is changed based on the achievement of a predetermined block division number changing condition. The one-chip microcomputer for gaming machines according to claim 2.   The gaming machine according to any one of claims 1 to 3, wherein a split authentication code is generated by selecting any one of a plurality of half-group operations by a predetermined selection method. One-chip microcomputer. In a gaming machine equipped with a unidirectional command receiving device that receives commands in one direction from a one-chip microcomputer for gaming machines on a gaming machine control board,
The one-chip microcomputer for gaming machines is
A storage area for permanently storing a program for performing game control;
A semi-group operation execution means capable of executing a semi-group operation defined as a binary operation satisfying a coupling law for all the numerical values in the authentication numerical area set in advance in the storage area;
A divided authentication code generating means for performing a semi-group operation for each divided block obtained by irregularly dividing the numerical value area for authentication into a plurality of blocks;
Command transmission means for adding the divided authentication code generated by the divided authentication code generating means to a command to the unidirectional command receiving device and transmitting the command;
With
The unidirectional command receiver
An authentication code storage means for storing in advance an authentication code obtained by performing a semi-group operation on all the numerical values included in the numerical value area for authentication in the one-chip microcomputer for gaming machines;
One-chip for gaming machine based on whether or not a result of performing a semi-group operation with one set of divided authentication codes added to a command from the one-chip microcomputer for gaming machine matches the authentication code A determination means for determining the authenticity of the microcomputer;
A gaming machine comprising: A plurality of unidirectional command receivers having the authentication code storage means and the determination means,
The divided authentication code generating means of the one-chip microcomputer for gaming machines generates a divided authentication code for each command transmission destination, and the command transmitting means sends one set of divided authentication codes to each unidirectional command receiving device. The gaming machine according to claim 5, wherein the game machine is transmitted.   The division authentication code generation means of the one-chip microcomputer for gaming machines is configured to generate a division authentication code to be added to a command to be transmitted to the unidirectional command reception device based on the achievement of a predetermined block division number change condition. The gaming machine according to claim 5 or 6, wherein the number of divisions is changed. The division authentication code generation means of the one-chip microcomputer for gaming machines generates a division authentication code within a range not exceeding a division upper limit number that is an upper limit value of the number of blocks that can divide the numerical value area for authentication,
The determination means of the unidirectional command receiving device is configured such that the result of the semi-group operation of the division authentication codes for the upper limit number of divisions received continuously does not coincide with the authentication code, so that the one-chip microcomputer for gaming machines 8. The gaming machine according to claim 7, wherein the game machine is determined. The division authentication code generating means of the one-chip microcomputer for gaming machines generates a divided authentication code by selecting any of a plurality of half-group operations by a predetermined selection method,
The command transmission means of the one-chip microcomputer for gaming machine includes a unidirectional command including semi-group operation specifying information for specifying the semi-group operation used by the divided authentication code generating means for generating the divided authentication code. To the receiving device,
The authentication code storage means of the unidirectional command receiving device stores a plurality of authentication codes respectively corresponding to half-group operations that can be selected by the divided authentication code generation means,
The determination means of the unidirectional command receiving device can switch a semi-group operation to be executed according to the semi-group operation specifying information included in the received command, and performs the semi-group operation with one set of divided authentication codes. The authenticity of the one-chip microcomputer for gaming machines is determined based on whether the result matches the authentication code corresponding to the half-group operation specified by the half-group operation identification information. The gaming machine according to any one of claims 5 to 8.

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