JP2006129960A - Game machine, method of detecting fraudulent action in game machine and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the exchange/alteration of a ROM of a memory module. <P>SOLUTION: Backup power 2b is supplied to an RTC 2c-1 provided in a processing part 2 through the memory module 3 (wiring 3c) and the supply of the backup power is eliminated in the case that the memory module is detached from the processing part. The backup power 2b is supplied to a RAM 2c-2 without interposing the memory module 3. By confirming whether or not there is the decline of a power supply voltage for the RTC 2c-1 and the RAM 2c-2 at the time of power supply, whether or not the memory module is detached from the processing part is detected. Fraudulent actions are suppressed by reporting an error or stopping a game when it is judged that the memory module is detached. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gaming machine such as a slot machine, and more particularly to a gaming machine capable of preventing illegal acts such as replacement of a storage element (ROM) and tampering of a storage element (ROM), a fraud detection method in the gaming machine, and a program.

  A gaming machine such as a slot machine or a pachinko machine has a built-in microcomputer (CPU), and controls lottery, winning, payout, and production by a program. This type of gaming machine receives an operation from the player, performs an internal lottery and a prize determination according to the lottery result, and controls a game medium payout control according to the prize, and receives a command from the main board. And a sub-board for notifying the result of the internal lottery and performing various effects.

  The main board program is important to directly control the game. The entire main board is sealed so as not to be tampered with. The sub board program controls the display device such as the liquid crystal display device, the speaker, and the display lamp to notify the player of the winning etc., and further controls the weight of the winning rate. There is a gaming machine (for example, assist time (AT): the table itself teaches the user with some action during a certain game). Specifically, as described above, an instruction for obtaining a ball is displayed on the liquid crystal display device so that the player can easily obtain the ball if the player operates according to the instruction.

  In this way, the main board and the sub board realize the lottery, winning, payout, and production control by the program. The program for each board performs important control related to the game.

  A storage element such as a ROM for storing a CPU and a program (hereinafter referred to as a memory or a semiconductor memory) is often mounted on a single board. However, in recent gaming machines, images and sounds are generated due to diversification of effects. In particular, a large number of memories are used in the sub-board. As a method for easily handling these large-capacity memories, the size of the memory package is reduced to DIP → SOP → SSOP, and a board (hereinafter referred to as “multiple memories”) is mounted in order to incorporate these into the board by a simple method. ROM modules or memory modules have been used (DIP: Dual In-line Package: a popular package system with external input / output pins arranged on both long sides of a flat rectangular package. SOP: Small Outline Package: Surface mounting package method, equivalent to DIP flat type SSOP: Shrink Small Out-Line Package: Package with reduced SOP lead pitch)

  In addition, since tools are required to insert and remove the ROM, it is possible to connect the memory module to the main board or sub board using a board-to-board connector or the like from the viewpoint of easy handling. is there.

  There are some that try to get a ball out illegally by modifying the program that controls the CPU of the gaming machine. A ROM whose program has been tampered with in an advantageous manner is illegally attached to the main board or sub board. Alternatively, the ROM of the sub board is illegally exchanged, and for example, the AT function is altered so as to be advantageous to itself.

  By the way, gaming machines such as slot machines and pachinko machines are regulated by law, and therefore the program for each board needs to be subject to prior verification and approval by the relevant organizations, and can be altered without permission. Not. The program mounted on each board, specifically, the content of the ROM is determined at the time of application to the related organizations, and the content of the ROM of the same type of gaming machine is always required to be the same.

  However, the ROM may be exchanged using illegal means and the contents of the program may be changed. The damage caused by such fraudulent acts is squeezing up the hall management and becoming a social problem.

  SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and is a gaming machine capable of preventing fraudulent acts such as ROM exchange and ROM tampering performed by exchanging memory modules, a fraud detection method in the gaming machine, and The purpose is to provide a program.

The present invention relates to a gaming machine that includes a substrate and a storage element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit, and at least a part of a power supply line from the backup power supply to the first semiconductor element is arranged to pass through the memory module,
A power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module, and one of the first semiconductor element or the second semiconductor element is provided when a power supply voltage decreases. A voltage drop detection semiconductor element that sets a flag indicating that or outputs a signal, and the other is a volatile memory element,
The determination unit
The characteristic value of the data of the volatile memory element is obtained when the power is turned off, and this is held as the characteristic value when the power is turned off, and the characteristic value of the data of the volatile memory element is obtained when the power is turned on. The presence or absence of voltage drop is determined by comparing with the feature value of
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
Whether or not the module is removed is determined based on the determination result of the voltage drop related to the volatile memory element and the determination result of the voltage drop related to the voltage drop detection semiconductor element.

  In order to obtain the feature value, for example, the determination unit obtains a checksum for all data or a part of data of the volatile memory element, and performs a logical operation including logical product, logical sum, or exclusive logical sum. And / or obtaining a hash value using a hash function.

The present invention relates to a gaming machine that includes a substrate and a storage element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit;
At least a part of a power supply line from the backup power source to the first semiconductor element is disposed to pass through the memory module;
The power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module,
One of the first semiconductor element and the second semiconductor element is a voltage drop detection semiconductor element that sets a flag indicating that a power supply voltage has dropped or outputs a signal, and the other is a volatile memory element. And
The determination unit
Voltage is reduced by saving all or part of the data in the volatile memory element when the power is turned off, reading all or part of the data in the volatile memory element when the power is turned on, and comparing it with the saved data The presence or absence of
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
Whether or not the module is removed is determined based on the determination result of the voltage drop related to the volatile memory element and the determination result of the voltage drop related to the voltage drop detection semiconductor element.

The present invention relates to a gaming machine that includes a substrate and a storage element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit;
At least a part of a power supply line from the backup power source to the first semiconductor element is disposed to pass through the memory module;
The power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module,
One of the first semiconductor element and the second semiconductor element is a voltage drop detection semiconductor element that sets a flag indicating that a power supply voltage has dropped or outputs a signal, and the other is a volatile memory element. And
The determination unit
Write predetermined data to a predetermined address of the volatile storage element, read data of the predetermined address of the volatile storage element when power is turned on, and compare this with the predetermined data To determine whether there is a voltage drop,
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
Whether or not the module is removed is determined based on the determination result of the voltage drop related to the volatile memory element and the determination result of the voltage drop related to the voltage drop detection semiconductor element.

When mounting the backup power supply in the processing unit,
A power supply line from the backup power supply to the first semiconductor element enters the memory module at least once from the backup power supply, returns to the processing unit via the memory module, and is connected to the first semiconductor element To be arranged.

When mounting the backup power supply in the memory module,
A power supply line from the backup power source to the first semiconductor element enters the processing unit from the memory module and is arranged to be connected to the first semiconductor element.

  Preferably, when the determination result related to the first semiconductor element indicates a voltage drop and the determination result related to the second semiconductor element does not indicate a voltage drop, it is determined that the module has been removed, and an error notification or game Do at least one of the stops.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power drop, and a voltage drop detection semiconductor element and a volatile memory element that receive power from the backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element when the memory module is removed. A method of detecting fraud in a gaming machine configured to be stopped, but to maintain power supply to the volatile memory element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, it is determined as an illegal act.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power supply and a voltage drop detection semiconductor element and a volatile memory element that receive power supply from the backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed. However, a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined that the illegal action is performed.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power drop, and a voltage drop detection semiconductor element and a volatile memory element that receive power from the backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element when the memory module is removed. A method of detecting fraud in a gaming machine configured to be stopped, but to maintain power supply to the volatile memory element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, it is determined as an illegal act.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power supply and a voltage drop detection semiconductor element and a volatile memory element that receive power supply from the backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed. However, a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined that the illegal action is performed.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power drop, and a voltage drop detection semiconductor element and a volatile memory element that receive power supply from the backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element when the memory module is removed. A method of detecting fraud in a gaming machine configured to be stopped, but to maintain power supply to the volatile memory element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, it is determined as an illegal act.

The present invention includes a processing unit including a CPU, a substrate and a memory element mounted on the substrate, a memory module that can be attached to and detached from the processing unit, and a backup for supplying power when the power is turned off. A power supply and a voltage drop detection semiconductor element and a volatile memory element that receive power supply from the backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed. However, a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined that the illegal action is performed.

The present invention is a program for causing a CPU to execute the above method.
The program according to the present invention is recorded on a recording medium, for example.
Examples of the medium include EPROM device, flash memory device, flexible disk, hard disk, magnetic tape, magneto-optical disk, CD (including CD-ROM and Video-CD), DVD (DVD-Video, DVD-ROM, DVD- RAM), ROM cartridge, RAM memory cartridge with battery backup, flash memory cartridge, nonvolatile RAM cartridge, and the like.

  In addition, a communication medium such as a wired communication medium such as a telephone line and a wireless communication medium such as a microwave line is included. The Internet is also included in the communication medium here.

  A medium is a medium in which information (mainly digital data, a program) is recorded by some physical means, and allows a processing device such as a computer or a dedicated processor to perform a predetermined function. is there.

  According to the present invention, the backup power is supplied to the first semiconductor element in the processing unit via the memory module so that the backup power is not supplied when the memory module is removed from the processing unit. Even when the memory module is removed from the processing unit, the power supply to the second semiconductor element is maintained, and whether or not the power supply voltage has decreased for the first semiconductor element and the second semiconductor element when the power is turned on. It is possible to detect whether or not the memory module has been removed from the processing unit. When it is determined that the memory module has been removed, fraudulent acts can be suppressed by notifying an error or stopping the game.

Embodiment 1 of the Invention
A gaming machine according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a gaming machine (also called a slot machine or a spinning cylinder gaming machine).
A player who wants to enjoy a game with the slot machine 10 first borrows a medal as a game medium from a medal lending machine (not shown) or the like, and inserts a medal directly into the medal insertion slot 100 of the medal insertion device. The medal slot 100 is provided at a substantially central height in front of the slot machine 10.

  The slot machine 10 has a square box-shaped housing 11. A square window-like display window 12 facing the player side is formed at the center and upper part of the casing 11. A symbol display window 13 through which the symbols 61 of the three rotary reels 40 can be seen is formed at the center of the display window 12 at the center. The bet switch 16 is a switch located below the rotary reel 40, and reduces the number of stored medals inserted and stored in the medal insertion slot 100 to replace the medal insertion. The settlement switch 17 is a switch located obliquely below the rotating reel, and pays out the stored inserted medal. The start switch 30 is a lever positioned obliquely below the rotary reel 40 and starts driving the reel unit 60 on condition that a game medal is inserted or the bet switch 16 is inserted. The stop switch 50 is for stopping the driving of the reel unit 60. The reel unit 60 is composed of three rotating reels 40. Each rotating reel 40 includes a rotating drum made of a synthetic resin and a tape-like reel tape 42 attached around the rotating drum. On the outer peripheral surface of the reel tape 42, a plurality of (for example, 21) symbols 61 are displayed. Reference numeral 62 denotes a liquid crystal display unit for performing various effects.

  Inside the slot machine 10, a control device for controlling the overall operation of the slot machine 10 is incorporated as will be described later. The control device is configured around a CPU and includes a ROM, a RAM, an I / O, and the like. The CPU (processing unit) is operated by reading a program stored in a ROM (storage unit) in response to the player's operation. Specifically, the CPU (processing unit) is operated by the start switch 30 and the stop switch 50. Based on this, the rotation and stop of the rotary reel 40 are controlled, and the display of lamps, speakers, and the like are controlled. Temporary data necessary for the CPU to operate is RAM (generally RAM is a volatile memory, and data is lost in principle when the power is turned off. A backup power supply may be prepared, and in this case, data is not lost even if the power is turned off. The CPU performs a predetermined operation in accordance with a program recorded in the ROM, records temporary data necessary for processing in the RAM, and reads out and refers to the recorded data as necessary.

  The start switch 30 is a lever that is positioned obliquely below the rotary reel 40 as described above. The start switch 30 can be obtained on the condition that a game medal is inserted or the bet switch 16 is inserted or according to a winning determination. "Replay)" is to start driving the reel unit 60 on condition that a predetermined time has elapsed since the previous game.

  The stop switch 50 is for stopping the driving of the reel unit 60 as described above. Specifically, the stop switch 50 includes three switches corresponding to each rotary reel 40, and one stop switch 50 is disposed below each rotary reel 40. The operation of the stop switch 50 corresponding to the rotating reel 40 is set to stop the rotation of the corresponding rotating reel 40.

  When the start switch 30 is operated on the condition that the medal is inserted or the bet switch 16 is inserted, or on the condition that a predetermined time elapses from the previous game at the time of the “replay”, the reel unit 60 is driven, and the three The rotary reel 40 starts to rotate. Thereafter, when one of the stop switches 50 is operated, the rotation of the corresponding rotary reel 40 is stopped. When all three stop switches 50 are operated, the rotation of the three rotary reels 40 is stopped. At this time, if a predetermined symbol 61 on the effective pay line of the display window 13 stops, it is determined that the winning is made, and a predetermined number of medals are paid out through a hopper unit (not shown). In addition, you may credit instead of paying out medals.

  FIG. 2 is a block diagram showing an electrical schematic structure of the slot machine 10. In this figure, the display about the power supply system is omitted. The slot machine 10 includes a main substrate 1 and a sub-substrate 2 that operates in response to commands from the main substrate 1 as main processing devices. At least the main substrate 1 is accommodated inside the case so that it cannot be contacted from the outside, and a sealing process is performed so that traces remain when the substrates are removed.

  The main board 1 is for performing an internal lottery in response to a player's operation, and processing such as reel rotation / stop and medal payout. The main board 1 includes a CPU that performs a control operation according to a preset program, a ROM that is a storage unit that stores the program, and a RAM that temporarily stores processing results and the like.

  The sub-board 2 is for receiving a command signal from the main board 1 and notifying the result of the internal lottery and performing various effects. The sub-board 2 includes a CPU that performs a control operation according to a preset program corresponding to the command signal, a ROM that is a storage unit that stores the program, and a RAM that temporarily stores processing results and the like. The flow of commands is only one from the main board 1 to the sub board 2, and conversely, no command or the like is issued from the sub board 2 to the main board 1. Further, the sub-board 2 includes a memory module 3 on which a semiconductor memory such as a ROM is mounted. The main board 1 may be provided with a memory module.

  The main board 1 includes a start switch 30, a stop switch 50, a reel drive unit 70, a reel position detection circuit 71, a hopper drive unit 80, a hopper 81, and a medal detection unit 82 for counting the number of medals paid out from the hopper 81. Is connected. A peripheral board (local board) such as a control board 200 of the liquid crystal display device 62, a speaker 201, and an LED board 202 is connected to the sub board 2.

FIG. 3 shows a state where the memory module 3 is mounted on the sub-board (processing unit) 2.
The memory module 3 includes a memory module substrate 3b, one or a plurality of semiconductor memories (ROM) 3a mounted thereon, and a memory module 3 side for electrically connecting the memory module 3 to the sub-substrate 2. And a connector 6. The sub-board 2 is provided with a connector 2a for electrical connection with the memory module 3. The connector 2 a is coupled with the connector 6 of the memory module 3. In the example of FIG. 3, the memory module 3 is attached to the connector 2 a so as to be perpendicular to the sub-board 2.

  FIG. 4 shows a connection diagram between the memory module and the processing unit (sub board) according to the first embodiment of the present invention. This figure shows only the parts necessary for explaining the operation of the first embodiment of the present invention, omitting the display of the CPU on the sub-board 2 and the ROM on the memory module 3, and the display of address signals and data signals. is doing.

  In FIG. 4, 2b is a backup power source for supplying power when the power is turned off. The backup power source 2b is a secondary battery such as a lithium battery, but the present invention is not limited to the secondary battery. A battery such as a primary battery or a capacitor may be used. 2c-1 is a real-time clock IC (semiconductor element; hereinafter referred to as RTC) that receives power from a backup power source. RTC2c-1 is a commercially available IC that has functions such as a calendar function and counter function for year, month, date, day of the week, hour, minute, and second, as well as functions such as a time alarm, interval timer, and time change interrupt. is there. The RTC 2c-1 is configured to detect a drop in the power supply voltage as will be described later, and can be called a voltage drop detection semiconductor element in view of this point. Reference numeral 2c-2 denotes a RAM (volatile storage element) that receives power from the backup power supply 2b. The RTC 2c-1 and the RAM 2c-2 are supplied with power from the same backup power source 2b when the power is cut off, but the wiring route from the backup power source 2b is different (this point will be further described later). A determination unit 2d determines whether or not the memory module 3 is removed. The determination unit 2d can read data (flag) from the RTC 2c-1 and RAM 2c-2 and write data to the RTC 2c-1 and RAM 2c-2 (set / reset flag). The determination unit 2d is realized by a CPU (not shown) that operates according to a predetermined program, for example. In addition to determining whether or not the memory module 3 has been removed, the determination unit 2d may determine the deterioration of the backup power source 2b. Reference numeral 2e denotes a diode that receives the power supply (DC voltage) VDD of the substrate and supplies it to the backup power supply 2b for charging, and also prevents the current of the backup power supply 2b from flowing back to the power supply VDD at the time of power-off backup.

  In FIG. 4, the backup power source 2 b is mounted on the sub-board (processing unit) 2, but at least a part of the power supply line from the backup power source 2 b to the RTC 2 c-1 is arranged so as to pass through the memory module 3. ing. That is, the power supply line from the backup power supply 2b to the RTC 2c-1 is first connected from the backup power supply 2b to the terminal 2a-1 of the connector 2a, and then contacts the terminal 6-1 of the connector 6 corresponding to this terminal. The memory module 3 is entered. The power supply line returns to the sub-board 2 again via the terminal 6-2 of the connector 6 and the terminal 2a-2 of the connector 2a, and is connected to the power supply terminal of the RTC 2c-1. The terminals 6-1 and 6-2 of the connector 6 are connected in the memory module 3 by wiring 3c. On the other hand, the power supply line from the backup power supply 2b to the RAM 2c-2 does not pass through the memory module 3. That is, the connection between the backup power source 2b and the RAM 2c-2 exists only on the sub-board 2, and does not go outside.

  For reference, FIG. 11 shows a connection between the conventional backup power supply 2b, the RTC 2c-1, and the RAM 2c-2. Conventionally, these are directly connected and do not go through the memory module 3. The arrangement in which at least part of the power supply line from the backup power supply 2b to the RTC 2c-1 passes through the memory module 3 is novel.

  The apparatus / method according to the first embodiment of the present invention supplies the backup power to the volatile storage element (RAM) 2c-1 on the sub-substrate (processing unit) 2 via the memory module 3, and the memory When the module 3 is removed from the sub-board 2, the backup power is not supplied to the RTC 2c-1, and whether or not the power voltage is lowered with respect to the RTC 2c-1 when the power is turned on, and the contents of the RAM 2c-2 Confirm whether or not the memory module 3 has been removed from the sub-board 2 by confirming whether the power supply voltage is the same as when the power was turned off (if there is a mismatch, this means that the power supply voltage has decreased with respect to the RAM 2c-2). It is characterized by. If the memory module 3 is not removed, the backup is performed normally, and the RTC 2c-1 should not detect a drop in the power supply voltage when the power is turned off and when the power is turned on (that is, while the power is turned off). . If the RTC 2c-1 detects a drop in the power supply voltage, it can be determined that the memory module 3 may have been removed. The RTC 2c-1 has a flag register therein, and at least one bit thereof is a flag (VLF (Voltage Low Flag) bit) set when the power supply voltage drops. The fact that the VLF bit is set (= 1) means that time-measured data or the like may be lost due to a decrease in power supply voltage or the like, and it is recommended to initialize the registers and the like.

  Similarly, when the backup power supply 2b deteriorates, the RTC 2c-1 detects a drop in the power supply voltage. In this case, the contents of the RAM 2c-2 also change. The RTC 2c-1 and the RAM 2c-2 are checked for the presence or absence of a decrease in the power supply voltage, and these results are comprehensively determined to distinguish the case where the memory module 3 is removed from the case where the backup power supply 2b is deteriorated. can do.

  In order to determine whether or not the contents of the RAM 2c-2 have changed during power-off, that is, between power-off and power-on, a checksum (check sum) is used in the first embodiment of the invention. The checksum is a total obtained for the data of all addresses of the RAM or the data of some addresses. Even when one bit of one data changes, this can be detected by a checksum. The checksum can be said to be a feature value that represents the entire data of the RAM 2c-2.

  FIG. 5 shows a processing flowchart when the power switch is turned off, and FIG. 6 shows a processing flowchart when the power switch is turned on. FIG. 7A shows a timing chart when the power switch is turned off, and FIG. 7B shows a timing chart when the power switch is turned on. The operation of the first embodiment of the invention will be described with reference to these drawings.

  In FIG. 7A, when the power switch is on, the power supply voltage is a specified value (period P1). In the period P1, as indicated by a thick line in FIG. 8, the power supply VDD is supplied to the RTC 2c-1 and the RAM 2c-2, and the backup power supply 2b is charged. When the power switch is turned off from on (time T1), the power supply voltage supplied to the sub-board 2 or the like does not decrease immediately, and after a while after the power switch is turned off, the power supply voltage becomes zero ( Time T2). During this period (period P2), the CPU or the like of the sub-board 2 can perform a predetermined process. When the power switch is turned from on to off (time T1), the power-off signal indicating that effect becomes effective immediately after that, so that the CPU or the like may execute processing at the end of the power source in response to the power-off signal. it can. Specifically, the process of FIG. 5 is performed in the period P2.

  That is, calculated a checksum of RAM (S1), stores respectively the checksum calculated to any address in RAM (previously decide whether to advance which address) (S2). Since the backup power is supplied to the RAM 2c-2, the characteristic value (check sum) of the RAM 2c-2 at the time of power-off is held in the RAM 2c-2 during the power-off period (period P3 in FIG. 7). become.

  In the period P3 after time T2 in FIG. 7A, the power supply voltage is zero, but power is supplied from the backup power supply 2b to the RTC 2c-1 and the RAM 2c-2 as shown by a thick line in FIG. Therefore, the RTC 2c-1 does not detect a decrease in the power supply voltage, and the contents of the RAM 2c-2 are retained.

  Next, as shown in FIG. 7B, when the power switch is turned on (time T3), the power supply voltage rises and quickly reaches the specified value. At that time, a reset signal is usually generated, and the CPU or the like starts an initial operation in the subsequent period P4. 6 is performed as one of the initial operations.

  That is, the checksum of the RAM 2c-2 is obtained (S10), the checksum stored in the RAM 2c-2 when the power is cut off is read (S11), and both are compared (S12). In the comparison process of S12, it is determined whether or not there is a power supply voltage drop.

  If the checksum read in S11 for the RAM 2c-2 matches the checksum obtained in S10 (match in S12), it means that the contents of the RAM 2c-2 are retained even when the power is turned off. Since it can be determined that the backup power supply 2b is normal, the processing subsequent to S14 is performed to determine whether or not the memory module 3 has been removed.

  If the checksums do not match (does not match in S12), it means that the backup power supply 2b has deteriorated, so error processing (S13) is performed and a notification to that effect is given.

  Next, the flag register of RTC2c-1 is checked (S14), and it is checked whether the VLF bit is set (S15). When the VLF bit is not set (NO), it means that the battery is backed up even when the power of the RTC 2c-1 is turned off, so it can be determined that the memory module 3 has not been removed. Since this is a normal state, normal activation processing is performed (S17). At this time, the checksum stored in the RAM 2c-2 may be cleared.

  On the other hand, when the memory module 3 is replaced during the power-off period (in order to enable the ROM of the memory module, it is necessary to replace it when the power is turned off), the memory module 3 is removed as shown in FIG. At that time, the power supply to the RTC 2c-1 is cut off. This is because at least a part of the power supply line from the backup power supply 2b to the RTC 2c-1 is arranged to pass through the memory module 3. In the state of FIG. 10, the VLF bit of RTC2c-1 is set (= 1), and even if power is supplied again, the bit is not reset (= 0). As a result, the determination result in S15 is YES, error processing is performed, and notification is made that the memory module 3 has been replaced (S16). After this, the normal activation process is not performed, so that the game cannot be performed. Note that error processing may be performed when a VLF bit set is detected even during a period other than the power-off period.

  According to the first embodiment of the present invention, the backup power is supplied to the voltage drop detection semiconductor element (for example, RTC) through the memory module, and the voltage drop occurs when the memory module is removed from the processing unit (sub-board). The backup power supply to the detection semiconductor element is cut off to cause a backup failure. When the power is turned on, the voltage drop detection semiconductor element is checked for voltage drop, so if the memory module is removed, it will be detected that there is a voltage drop, and there is a possibility of fraud. The game is stopped by moving to an error state or the like. On the other hand, since the backup power supply line of the volatile memory element (RAM) does not pass through the memory module, the voltage does not decrease even if the memory module is removed, and the characteristic values thereof match. When a voltage drop is detected only for the voltage drop detection semiconductor element, it is determined that the memory module has been replaced, and error processing is performed. By processing in this way, it is possible to determine that the memory module has been removed in distinction from backup failure due to deterioration of the backup power supply. With the configuration as described above, replacement of the memory module can be detected and an error can be notified, and it is possible to suppress an illegal act of illegal replacement of the ROM.

  In the above description, a real-time clock IC (RTC) has been described as an example of a semiconductor element that receives the supply of backup power. However, this is only an example, and other semiconductor elements can be used. For example, it is possible to use an IC that detects this when the power is lowered and outputs a signal (for example, a reset signal), and holds the output until the power is turned on, for example, by a register or a nonvolatile memory (EEPROM, etc.).

  In the above description, the case where a checksum is obtained as a feature value has been described as an example, but the present invention is not limited to this. It suffices if a characteristic value unique to the contents of the volatile memory element (RAM) can be obtained. For example, a logical operation including logical product, logical sum, or exclusive logical sum is performed, or a hash value is obtained by a hash function. You may do it. The hash function is a calculation method for generating a fixed-length pseudorandom number from a given original text, and the generated value is called a “hash value”. Also called “summary function” or “message digest”. Since an irreversible one-way function is included, the original text cannot be reproduced from the hash value, and it is extremely difficult to create different data having the same hash value.

  In the above description, the feature value is written in the RAM 2c-2 itself, but the present invention is not limited to this. You may make it write in other RAM or non-volatile memory elements (EEPROM etc.) to which backup power is supplied.

Modification of Embodiment 1 of the Invention.
In the above example, a voltage drop detection semiconductor element (RTC) is applied to an element (first semiconductor element) that supplies backup power via the memory module 3, and an element that supplies backup power without passing through the memory module 3 (second semiconductor element). Although the volatile memory element (RAM) is applied to the semiconductor element), the present invention is not limited to this. As shown in FIG. 12, a volatile storage element (RAM) is applied to an element (first semiconductor element) that supplies backup power via the memory module 3, and an element that supplies backup power without going through the memory module 3. A voltage drop detection semiconductor element (RTC) may be applied to the (second semiconductor element).

  In this case, the processes of S10 to S12 and the processes of S14 to S15 in FIG. 6 are interchanged.

  That is, first, the flag register of RTC2c-1 is checked to see if the VLF bit is set. When the VLF bit is not set, it means that the RTC 2c-1 is backed up even while the power is off. Therefore, it can be determined that the backup power source 2b is normal. judge. When the VLF bit is set, it means that the backup power supply 2b has deteriorated, so error processing (S13) is performed to notify that effect.

When the memory module 3 is replaced during the power-off period P3 (power supply to the RTC 2c-1 is cut off when the memory module 3 is removed as shown in FIG. 10), the contents of the RAM 2c-2 are lost. Even if power is supplied again, it will not recover (the content will be random). Therefore, with respect to the RAM 2c-2, the read checksum (checksum when the power is turned off) does not match the checksum obtained when the power is turned on. This is because, since the contents of the RAM 2c-2 are lost, the checksum obtained when the power is turned on is naturally different from that obtained when the power is turned off, and the stored checksum itself is also lost. Therefore, error processing is performed to notify that the memory module 3 has been replaced (S16).
The modification of the first embodiment of the invention also has the same effect as the first embodiment of the invention.

Embodiment 2 of the Invention
In the first embodiment of the invention, the backup power supply 2b is mounted on the sub-board 2, but the present invention is not limited to this. For example, a backup power source 2b may be mounted on the memory module 3 as shown in FIG. Even in the configuration of FIG. 13, at least a part of the power supply line from the backup power supply 2 b to the RTC 2 c-1 can be arranged so as to pass through the memory module 3. The configuration of FIG. 13 also provides the same operational effects as those of the first embodiment.

Embodiment 3 of the Invention
In the first embodiment of the invention, the power supply voltage drop is detected by using the feature value of the content of the volatile memory element. However, the same detection can be performed by comparing the data itself without obtaining the feature value. . Examples are listed. The following example can also be applied to a modification of the first embodiment of the invention.

(1) By saving all data in the RAM 2c-2, for example, by writing to another RAM or a non-volatile storage element (EEPROM, etc.) to which backup power is supplied, the data is held even when the power is cut off. In general, evacuation is temporary in order to use the contents of a specific storage location (location), region (region), register (register), etc. on the main storage for other purposes. In other words, it is stored in another storage location of the main storage device or in an auxiliary storage.
When the power is turned off, all data in the RAM 2c-2 is read, and these are written in another RAM or a non-volatile memory element. When the power is turned on, all data in the RAM 2c-2 is read and compared with the saved data. As a result of the comparison, when a discrepancy occurs in all or part of the data, it is determined that the power supply voltage has decreased.

(2) By saving a part of the data in the RAM 2c-2, for example, by writing to another RAM or a non-volatile storage element (EEPROM, etc.) to which backup power is supplied, the data is held even when the power is cut off.
When the power is turned off, a part of the data in the RAM 2c-2 is read, and these are written in another RAM or a nonvolatile memory element. When the power is turned on, a part of the data in the RAM 2c-2 (at the same address as when the power is turned off) is read and compared with the saved data. As a result of the comparison, when a discrepancy occurs in all or part of the data, it is determined that the power supply voltage has decreased. Only the data at one address may be saved. Since the data of all addresses in the RAM is affected by the power interruption, the determination can be made only by monitoring the data of one address.

(3) A part of the data in the RAM 2c-2 is written (saved) in an area prepared in advance in the RAM 2c-2. Other points are the same as (2) above.

  The third embodiment of the invention has the same effects as the first embodiment.

Embodiment 4 of the Invention
Even if a specific value is written at a specific address in the RAM and it is determined whether or not it is maintained when the power is turned on, the same effects as those of the first to third embodiments of the present invention can be obtained. The specific address of the RAM is always determined to be a specific value at least when the power is turned off, and if it is not maintained when the power is turned on, it is determined that the power supply voltage has decreased. In this case, it is not necessary to obtain the characteristic value, and it is not necessary to read the contents of the RAM when the power is turned off.

  FIG. 14 shows a flowchart of the preliminary data writing process according to the fourth embodiment of the invention, and FIG. 15 shows a flowchart of the process when the power switch is turned on. The process of writing a specific value to the specific address in FIG. 14 may be performed when the power is turned off (period P2 in FIG. 7), or may be performed at any other timing (such as at initialization). You may make it repeat repeatedly regularly or irregularly.

  The fourth embodiment of the invention has the same effects as the first embodiment of the invention.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  Further, in the present specification, the term “unit” does not necessarily mean a physical means, but includes a case where the function of each unit is realized by software. Furthermore, the function of one part may be realized by two or more physical means, or the function of two or more parts may be realized by one physical means.

It is a front view of a gaming machine (slot machine). It is a block diagram of a gaming machine. It is a perspective view which shows the state which attached the memory module to the process part (sub board | substrate). It is a block diagram which shows the backup power supply system which concerns on Embodiment 1 of invention. It is a process flowchart at the time of OFF of the power switch which concerns on Embodiment 1 of invention. It is a process flowchart at the time of ON of the power switch which concerns on Embodiment 1 of invention. 3 is a timing chart for explaining the operation of the first embodiment of the invention. It is a block diagram for demonstrating operation | movement of Embodiment 1 of invention (at the time of a power supply ON and a backup power supply non-operation). It is a block diagram for demonstrating operation | movement of Embodiment 1 of invention (at the time of a power-off and backup power supply operation | movement). It is a block diagram for demonstrating the operation | movement of Embodiment 1 of invention (the state which removed the memory module at the time of a power failure). It is a block diagram which shows the conventional backup power supply system. It is a block diagram which shows the backup power supply system which concerns on the modification of Embodiment 1 of invention. It is a block diagram which shows the backup power supply system which concerns on Embodiment 2 of invention. It is a flowchart of the prior data writing process which concerns on Embodiment 4 of invention. It is a process flowchart at the time of ON of the power switch which concerns on Embodiment 4 of invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main board | substrate 2 Sub board | substrate 2a Connector 2a-1 1st terminal 2a-2 2nd terminal 2b Backup power supply 2c-1 RTC (Voltage drop detection semiconductor element, 1st semiconductor element in FIG. 4, 2nd semiconductor element in FIG. 12)
2c-2 RAM (volatile memory element, first semiconductor element in FIG. 4, second semiconductor element in FIG. 12)
2d determination unit 2e diode 3 memory module 3a storage element (semiconductor memory, ROM)
3b Memory module substrate 3c Backup power supply line in memory module 6 Connector 6-1 First terminal 6-2 Second terminal 10 Slot machine 11 Housing 12 Display window 13 Symbol display window 16 Bet switch 17 Checkout switch 30 Start switch 40 Reel 42 Reel Tape 50 Stop Switch 60 Reel Unit 61 Symbol 62 Liquid Crystal Display Unit 70 Reel Drive Unit 71 Reel Position Detection Circuit 80 Hopper Drive Unit 81 Hopper 82 Medal Detection Unit 100 Medal Insertion Port 200 Liquid Crystal Control Board 201 Speaker 202 LED Board 304 Medal payout slot 311 Medal receiving part (lower plate)

Claims (19)

In a gaming machine that includes a substrate and a memory element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit;
At least a part of a power supply line from the backup power source to the first semiconductor element is disposed to pass through the memory module;
The power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module,
One of the first semiconductor element and the second semiconductor element is a voltage drop detection semiconductor element that sets a flag indicating that a power supply voltage has dropped or outputs a signal, and the other is a volatile memory element. And
The determination unit
The characteristic value of the data of the volatile memory element is obtained when the power is turned off, and this is held as the characteristic value when the power is turned off, and the characteristic value of the data of the volatile memory element is obtained when the power is turned on. The presence or absence of voltage drop is determined by comparing with the feature value of
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
A gaming machine, wherein whether or not the module is removed is determined based on a determination result of a voltage drop related to the volatile memory element and a determination result of a voltage drop related to the voltage drop detection semiconductor element.   The determination unit obtains a checksum for all data or a part of data of the volatile memory element, and performs a logical operation including logical product, logical sum, or exclusive logical sum to obtain the feature value. 2. The gaming machine according to claim 1, wherein at least one of obtaining a hash value by a hash function is performed. In a gaming machine that includes a substrate and a memory element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit;
At least a part of a power supply line from the backup power source to the first semiconductor element is disposed to pass through the memory module;
The power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module,
One of the first semiconductor element and the second semiconductor element is a voltage drop detection semiconductor element that sets a flag indicating that a power supply voltage has dropped or outputs a signal, and the other is a volatile memory element. And
The determination unit
Voltage is reduced by saving all or part of the data in the volatile memory element when the power is turned off, reading all or part of the data in the volatile memory element when the power is turned on, and comparing it with the saved data The presence or absence of
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
A gaming machine, wherein whether or not the module is removed is determined based on a determination result of a voltage drop related to the volatile memory element and a determination result of a voltage drop related to the voltage drop detection semiconductor element. In a gaming machine that includes a substrate and a memory element mounted on the substrate, and includes a memory module that can be attached to and detached from a processing unit including a CPU.
A backup power source for supplying power when the power is turned off, a first semiconductor element and a second semiconductor element mounted on the processing unit and receiving power supply from the backup power source, and determining whether the memory module is removed A determination unit;
At least a part of a power supply line from the backup power source to the first semiconductor element is disposed to pass through the memory module;
The power supply line from the backup power source to the second semiconductor element is arranged not to pass through the memory module,
One of the first semiconductor element and the second semiconductor element is a voltage drop detection semiconductor element that sets a flag indicating that a power supply voltage has dropped or outputs a signal, and the other is a volatile memory element. And
The determination unit
Write predetermined data to a predetermined address of the volatile storage element, read data of the predetermined address of the volatile storage element when power is turned on, and compare this with the predetermined data To determine whether there is a voltage drop,
Determine the presence or absence of voltage drop based on the flag or the signal of the voltage drop detection semiconductor element at power-on,
A gaming machine, wherein whether or not the module is removed is determined based on a determination result of a voltage drop related to the volatile memory element and a determination result of a voltage drop related to the voltage drop detection semiconductor element. The backup power supply is mounted on the processing unit,
The power supply line from the backup power source to the first semiconductor element enters the memory module from the backup power source at least once, returns to the processing unit via the memory module, and is connected to the first semiconductor element The gaming machine according to claim 1, wherein the gaming machine is arranged as described above. The backup power source includes a first backup power source mounted on the memory module and a second backup power source mounted on the processing unit,
The first semiconductor element is supplied with power from the first backup power source, the second semiconductor element is supplied with power from the second backup power source,
The power supply line from the first backup power source to the first semiconductor element is arranged to enter the processing unit from the memory module and to be connected to the first semiconductor element. The gaming machine according to any one of claims 1 to 4.   When the determination result relating to the first semiconductor element indicates a voltage drop and the determination result relating to the second semiconductor element does not indicate a voltage drop, it is determined that the module has been removed, and error notification or game stop 7. The gaming machine according to claim 1, wherein at least one of the following is performed. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
A game characterized in that a fraudulent act is determined when the flag of the voltage drop detection semiconductor element is set or the signal is output and the comparison result regarding the volatile memory element is coincident. A method of detecting fraudulent activity on a machine. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined as an illegal act. A method for detecting fraud in gaming machines. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
A game characterized in that a fraudulent act is determined when the flag of the voltage drop detection semiconductor element is set or the signal is output and the comparison result regarding the volatile memory element is coincident. A method of detecting fraudulent activity on a machine. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined as an illegal act. A method for detecting fraud in gaming machines. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
A game characterized in that a fraudulent act is determined when the flag of the voltage drop detection semiconductor element is set or the signal is output and the comparison result regarding the volatile memory element is coincident. A method of detecting fraudulent activity on a machine. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, it is determined as an illegal act. A method for detecting fraud in gaming machines. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, the CPU is caused to determine that it is an illegal act. Program for. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Obtain the characteristic value of the data of the volatile storage element at the time of power-off, hold this as the characteristic value at the time of power-off,
Determine the characteristic value of the data of the volatile storage element at power-on, compare this with the characteristic value at power-off,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, the CPU is determined to be fraudulent. Program to let you. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, the CPU is caused to determine that it is an illegal act. Program for. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Save all or part of the data in the volatile memory element when the power is turned off,
Read all or a part of the data of the volatile memory element at power-on, compare it with the saved data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, the CPU is determined to be fraudulent. Program to let you. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power supply, and the power supply from the backup power supply to the voltage drop detection semiconductor element is stopped when the memory module is removed. A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the volatile memory element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the flag of the voltage drop detection semiconductor element is set or the signal is output, and the comparison result regarding the volatile memory element is coincident, the CPU is caused to determine that it is an illegal act. Program for. A processing unit including a CPU, a substrate and a memory element mounted on the substrate; a memory module that is removable from the processing unit; a backup power source for supplying power when the power is turned off; A voltage drop detection semiconductor element and a volatile memory element that receive power supply from a backup power source, and the power supply from the backup power source to the volatile memory element is stopped when the memory module is removed, A program for causing a CPU to execute a method of detecting fraud in a gaming machine configured to maintain power supply to the voltage drop detection semiconductor element,
Write predetermined data to a predetermined address of the volatile storage element,
Read the data of the predetermined address of the volatile storage element at power-on, compare this with the predetermined data,
Check the flag or signal indicating that the power supply voltage of the voltage drop detection semiconductor element has dropped when the power is turned on,
When the comparison result regarding the volatile memory element is inconsistent, and the flag of the voltage drop detection semiconductor element is not set and the signal is not output, the CPU is determined to be fraudulent. Program to let you.

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