JP2015058047A - Game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid occurrence of a loss of a game parlor by preventing a situation in that putout balls are fraudulently put out even in a fraudulent act of connecting a fraudulent board between a main control board and a sub-control board to feed in a fraudulent command.SOLUTION: A main control board 11 includes a main CPU 111 for outputting a predetermined control command, and an output circuit 112 for sending a control command to a sub-control board 21. When a board for fraudulence is connected to a signal cable 30 connected between the main control board 11 and the sub-control board 21, and voltage is applied to the signal cable 30 from the board for fraudulence, output impedance at a side of an output terminal t22 in the output circuit 112 has a value in that voltage polarity in the output terminal t22 of the output circuit 112 does not change.

Description

  The present invention relates to a gaming machine including a main control board that controls the progress of a game and a sub-control board that controls a predetermined performance, and particularly to a signal cable that connects the main control board and the sub-control board. The present invention relates to a gaming machine capable of avoiding a situation in which a game hall suffers damage even when an illegal board is attached.

A gaming machine such as a slot machine or a pachinko machine is in line with the progress of the game by controlling the main control board that controls the progress of the game, and the liquid crystal display, decorative lamps such as LEDs, and presentation means such as speakers. And a sub-control board that controls game effects.
The transmission and reception of data between these boards is a unidirectional data communication from the main control board to the sub control board, and the main control board sends a control signal to the sub control board while managing the progress of the game. The sub control board that has received the game controls the effect means according to the control signal, so that a game effect synchronized with the progress of the game is performed.

By the way, in recent years, the game effects performed by the sub-control board are not limited to just effects, and there are also effects that affect the payout rate that affects the outcome of the game.
For example, there is a gaming machine configured to influence the game play rate of the gaming machine by performing a navigation effect that prompts the player to perform a predetermined operation based on a control signal input from the main control board by the sub control board. There is (for example, a slot machine that navigates the pressing order of stop buttons in the ART gaming state).

  Whether or not to perform such a navigation effect is determined based on a control signal input from the main control board. For example, an illegal connection cable or connector between the main control board and the sub control board is used. A navigation effect is forcibly performed by attaching an oscillation device or the like and outputting a control signal (for example, an AT command) related to a navigation effect that should be output at a specific timing from the device to the sub-control board. There is an increase in fraudulent behavior.

Therefore, a technique has been proposed that makes it possible to detect that such an illegal act has occurred, that is, that an unauthorized device has been attached to the cable or connector between the main control board and the sub control board.
For example, a generation pattern of a command generated by the main control board is predetermined, and it is determined whether or not the sub-control board that has received the command is generated according to the predetermined generation pattern for the received command. There has been proposed a gaming machine that determines that an illegal act has occurred when it is determined that it has not been generated according to a predetermined generation pattern (see, for example, Patent Document 1).
Specifically, the command is composed of a predetermined number of bits (for example, 8 bits), the most significant bit of the preceding command is set to 1, and the most significant bit of the subsequent command is set to 0. Also, in bits other than the most significant bit in each command (lower 7 bits of 8 bits), 1 is set only to 1 bit, and the other bits are set to 0. Then, for each command generated by the main control board, the bit that sets 1 among the lower bits (for example, the lower 7 bits) is changed, and the main control board and the sub-control are set with this transition pattern as a predetermined generation pattern. Share on board.
As a result, the sub-control board can identify that a fraud has occurred when a bit in which 1 is set in the received command is specified and this set does not conform to the transition pattern.

JP 2010-184069 A

However, the technique described in Patent Document 1 (hereinafter referred to as document technique) has the following problems.
For example, in literature technology, by changing the bit in which 1 is set out of 8 bits constituting a command for each command, the command is complicated, its analysis becomes difficult, and illegal command generation is prevented. It was.
However, since the transition pattern of the bit in which 1 is set repeats a predetermined transition at a fixed period, if this pattern is analyzed, an illegal command is generated in accordance with this transition pattern, and this illegal The command can be sent to the sub control board at a desired timing, and the sub control board can be illegally operated.
And if the transition pattern is analyzed in this way, after that, fraudulent acts cannot be prevented, and the illegal command reaches the CPU of the sub-control board, and the balls are illegally paid out. This will result in a situation where the game hall suffers damage.
As described above, the literature technique has a problem that it cannot sufficiently cope with an illegal board that sends an illegal command to the sub-control board.

Also, in the literature technique, a bit transition pattern of a command to which 1 is set is shared by both the main control board and the sub control board, and the main control board generates a command based on the transition pattern, and the sub control board The correctness of the received command was judged.
In order to realize such processing, a program for generating a command on the main control board and a program for determining whether the command received on the sub-control board is correct are newly developed, and these programs are stored in the main control board. Since it is necessary to store the data in the ROM and the ROM of the sub-control board, the technology requires considerable effort to develop such a program.

Furthermore, the literature technique has a problem that it cannot cope with an illegal act of deleting a regular control command.
In the unauthorized act of attaching an unauthorized device to the cable or connector between the main control board and the sub control board, as described above, the unauthorized device performs an operation of outputting an unauthorized command to the sub control board. However, in addition to this, for example, by performing an operation of deleting a regular command output from the main control board, a game state advantageous to the player (for example, an ART game state) is terminated. There are those that circumvent and illegally continue the advantageous gaming state and illegally pay out the balls.

There has been a problem that literature techniques cannot cope with such fraud. The reason is as follows. The regular command is composed of a plurality of pulses, and sends a signal using a potential difference between a high level potential and a low level potential.
In the above-described fraud, the command is deleted by shorting the cable to the ground (GND) and dropping the high level of the command to the low level.
On the other hand, the literature technique makes it difficult to analyze a command by changing the bit in which 1 is set among the 8 bits constituting the command for each command to make the command configuration complicated.
However, even if the configuration of the legitimate command is complicated as described above, when the illegal board for deleting the command is connected to the cable, the cable is short-circuited to the ground (GND), which is complicated. Legitimate commands are also deleted.
Then, the sub-control board does not recognize that the gaming state advantageous to the player has ended, and the advantageous gaming state continues illegally, resulting in a situation in which the ball is illegally paid out. It was.
As described above, the literature technique has a problem that it cannot cope with an illegal substrate for erasing a command.

  The present invention has been made in view of the above circumstances, and avoids a situation in which a gaming hall suffers damage due to an unauthorized board connected to a cable or the like that connects a main control board and a sub-control board. Or, when it is possible to control and an effective fraud prevention technology can be realized while reducing the labor required for program development, etc., and a fraudulent board that erases commands output from the main control board is connected to the cable However, an object of the present invention is to provide a gaming machine that can detect the connected illegal board.

  In order to achieve this object, a gaming machine according to the present invention is a gaming machine including a main control board that controls the progress of a game and a sub-control board that controls a predetermined performance. The main CPU that outputs the control command and an output circuit that sends the control command to the sub-control board, and a signal cable for sending the control command output from the output circuit to the sub-control board includes the main control board and the sub-control The output circuit is connected to the board, and the output circuit has an input terminal for inputting a control command output from the main CPU and an output terminal connected to the signal cable and for outputting the control command. The output impedance on the terminal side is output when an unauthorized board is connected to the signal cable and voltage is applied to the signal cable from the unauthorized board. It is constituted to be a value that the polarity is not changed in the voltage at the output terminal of the road.

  According to the gaming machine of the present invention, it is possible to avoid or suppress a situation in which a game hall suffers damage even if an unauthorized board is connected to a cable.

It is a front view which shows the structure of the slot machine in embodiment of this invention. FIG. 4 is a perspective view showing an internal configuration of the slot machine in the embodiment of the present invention. It is a block diagram which shows the structure of the main control part in 1st embodiment of this invention, and a sub control part. It is a circuit diagram which shows the structure of the main control part in 1st embodiment of this invention, and a sub control part. It is a block diagram which shows the structure of the main control part in 2nd embodiment of this invention, and a sub control part. It is a circuit diagram which shows the structure of the main control part in 2nd embodiment of this invention, and a sub control part. In the circuit shown in FIG. 6, the circuit showing the operation of the main control unit when the unauthorized board is connected to the signal cable connecting the main control unit and the sub control unit and the signal cable is short-circuited to the ground (GND). FIG. FIG. 7 is a circuit diagram showing an operation of the main control unit when an unauthorized board is connected to a signal cable and a voltage VCC is applied to the signal cable in the circuit shown in FIG. 6. It is a circuit diagram which shows the structure of the main control part in 3rd embodiment of this invention, and a sub control part. FIG. 10 is a circuit diagram illustrating an operation of the main control unit when an unauthorized board is connected to the signal cable and the signal cable is short-circuited to the ground (GND) in the circuit illustrated in FIG. 9. FIG. 10 is a circuit diagram illustrating an operation of the main control unit when an unauthorized board is connected to a signal cable and a voltage VCC is applied to the signal cable in the circuit illustrated in FIG. 9. It is a circuit diagram which shows the structure of the main control part in 4th embodiment of this invention, and a sub control part. It is a circuit diagram which shows the other structure of the main control part in 4th embodiment of this invention, and a sub control part. FIG. 14 is a circuit diagram illustrating an operation of the main control unit when an unauthorized board is connected to the signal cable and the signal cable is short-circuited to the ground (GND) in the circuit illustrated in FIG. 13. FIG. 14 is a circuit diagram showing an operation of the main control unit when an unauthorized board is connected to the signal cable and a voltage VCC is applied to the signal cable in the circuit shown in FIG. 13. It is a circuit diagram which shows the structure of the main control part which combined the structure of 2nd embodiment, and the structure of 4th embodiment. It is a circuit diagram which shows the structure of the main control part which combined the structure of 3rd embodiment, and the structure of 4th embodiment. It is a circuit diagram which shows the structure of the main control part which took in the stabilization power supply circuit in the structure of 2nd embodiment. It is a circuit diagram which shows the structure of the main control part which took in the stabilization power supply circuit in the structure of 3rd embodiment.

  Hereinafter, preferred embodiments of a gaming machine according to the present invention will be described with reference to the drawings.

[Game machine]
There are various types of gaming machines including a main control board that controls the progress of a game and a sub-control board that controls a predetermined performance, such as a slot machine, a pachinko machine, and a ball slot, but in this embodiment, A case where the present invention is applied to a slot machine will be described.

The slot machine according to the present embodiment is configured as a revolving game machine that can acquire medals as game media by rotating a plurality of reels.
Specifically, as shown in FIGS. 1 and 2, the number of medals actually inserted from the medal slot 2 (for example, three), or the operation of the bet button 2a from the credit medal stored internally. When the start lever 3 is operated (starting operation) in this state, the game can be started according to the number of medals inserted in the signal format (for example, three), and a plurality of reels 4 (4a to 4c) are operated. ) Starts rotating and when the stop buttons 5 (5a to 5c) corresponding to the respective reels 4a to 4c are pressed, the symbol corresponding to the lottery result of the lottery process performed at the operation timing of the start lever 3 is performed. The reels 4a to 4c are controlled to stop at the combination of the symbols, and the presence / absence of a winning is determined based on the combination of the symbols that have been stopped, and the medal from the medal payout device 7 according to the determination result. That are paid out, and a feasible structure of ordinary slot machine game.

In the slot machine 1 capable of realizing such a slot machine game, the main control unit 10 that controls the progress of the game is attached to the inner surface of the housing 1b that houses the devices constituting the slot machine 1. ing.
In the slot machine 1, the sub-control unit 20 that controls a predetermined effect as the game progresses configures the inner surface of the housing 1 b of the slot machine 1 or the front side of the slot machine 1. It is attached to the upper back of the front door 1a.

The sub-control unit 20 turns on an LED lamp or the like disposed on the front surface of the front door 1a or outputs a predetermined sound effect from the speaker 8 when winning a predetermined effect such as a big hit. To perform such effects as celebrating the prize.
In addition, the sub-control unit 20 currently performs control related to notification of the pressing order of the stop button 5, which is called so-called assist time (AT). Since the push order notification during the AT affects the appearance, the sub-control unit 20 that controls the push order notification is likely to be a target of fraud.

  Therefore, in the slot machine 1 of the present embodiment, as shown in FIGS. 3 and 4, the control command is relayed to the main CPU 111 that outputs a predetermined control command to the main control board 11 of the main control unit 10. And an output circuit 112 for sending to the sub-control board 21. The output impedance of the output circuit 112 is set to a low impedance.

By adopting such a configuration, even when an unauthorized board is attached to the signal cable 30 that connects between the main control board 11 and the sub control board 21 or the connector that is connected to the end of the signal cable 30, An illegal command cannot be sent from the illegal board to the sub-control board 21.
As a result, it is possible to avoid the situation where the ball is illegally paid out, and to prevent the situation where the game hall suffers damage.
Hereinafter, the details of the configuration and operation of the main control unit 10 and the sub control unit 20 of the present embodiment will be described with reference to FIGS.

[First embodiment of main control unit and sub-control unit]
In this embodiment, as shown in FIGS. 3 and 4, the main control board 11 of the main control unit 10 relays the main CPU 111 that outputs a predetermined control command and the control command output from the main CPU 111. An output circuit 112 that transmits to the sub-control unit 20, and among these, the output circuit 112 is configured by using an inverter circuit 113 having a low output impedance, so that the unauthorized circuit board connected to the signal cable 30 or the like Command sending is disabled.
The details of this configuration will be described in order below.

The main control unit 10 is attached to the inner surface of the casing 1b of the slot machine 1 in a state in which the main control board 11 for controlling the progress of the game is accommodated in the main board case 12 formed of, for example, synthetic resin. (See FIG. 2).
The main control board 11 is a printed circuit board on which a main CPU 111 as a central processing unit, storage means such as a ROM and a RAM, IC parts such as an I / O interface, various electronic parts such as resistors, capacitors, and transistors are mounted. It is.

The main CPU 111 executes the program stored in the storage means to execute processing relating to the progress of the game, and at the same time, each part of the control circuit mounted on the main control board 11 or the front door 1a or the housing 1b of the slot machine 1 The slot machine game is realized by directly or indirectly controlling the various devices arranged in the box.
The ROM, which is a storage unit, stores fixed data such as programs executed by the main CPU 111 and various tables. A RAM serving as a storage unit is used as a work area when the main CPU 111 executes a program.

In addition, a plurality of terminals t (for example, terminals t11 and t12 shown in FIG. 4) for inputting / outputting predetermined control signals are connected to the main CPU 111, and a control circuit mounted on the main control board 11 is connected. A predetermined control signal can be output through the terminal t to each part and the sub-control board 21.
The control signal output from the main CPU 111 includes a control command. The control command refers to a control signal for the main CPU 111 to transmit a predetermined state relating to the game to the sub CPU 211. The state transmitted by this control command includes, for example, the result of an internal lottery (winning of a predetermined gaming state, etc.), winning a big win, the end of the predetermined gaming state, and the like.
This control command is output from the signal output terminal t11 of the main CPU 111 and sent to the sub CPU 211.

Further, the main CPU 111 is supplied with a power supply voltage VCC from a power supply unit 114a mounted on the main control board 11 or a power supply board (not shown).
The power supply unit 114a receives supply of voltage from the power supply device 6 (see FIG. 2) disposed inside the housing 1b of the slot machine 1, and converts this voltage into a predetermined voltage (for example, from DC12V to DC5V). A regulator can be provided.

  In addition to the main CPU 111 and the like, the main control board 11 includes an output circuit 112 for relaying a control command output from the main CPU 111 and transmitting it to the sub control board 21.

For example, as shown in FIG. 4, the output circuit 112 can use an inverter circuit 113 as a circuit having a sufficiently low output impedance on the side of outputting a control command.
The inverter circuit 113 is a logic inversion circuit that inverts the polarity of the input signal and outputs the signal, and implements a logic negation (NOT). That is, as an operation, when a signal having a polarity of H (High level) is input, a signal having a polarity of L (Low level) is output. Further, when a signal having a polarity of L is input, a signal having a polarity of H is output.
Any circuit that can input and output with this logic can be used as the inverter circuit 113. For example, a drain resistance type PMOS inverter that combines a p-channel MOSFET (metal oxide semiconductor field effect transistor) PMOS and one resistor, or an n-channel MOSFET NMOS and one resistor. A combined drain resistance type NMOS inverter, a gate structure CMOS (complementary metal-oxide-semiconductor) in which PMOS and NMOS are arranged complementarily can be used as the inverter circuit 113. Also, inverters constructed with bipolar transistors, RTL (Resistor-transistor logic) or TTL (Transistor-transistor)
An inverter composed of logic) can also be used as the inverter circuit 113.
In the present embodiment, the CMOS shown in FIG.

The sub-control unit 20 is configured such that the sub-control board 21 for controlling a predetermined effect is housed in a sub-board case 22 formed of, for example, synthetic resin, or the inner surface of the housing 1b of the slot machine 1 or It is attached to the back surface of the front door 1a (see FIG. 2).
The sub control board 21 is a printed circuit board on which a sub CPU 211 as a central processing unit, storage means such as ROM and RAM, IC parts such as an I / O interface, various electronic parts such as resistors, capacitors, and transistors are mounted. It is.

The sub CPU 211 executes a program stored in the storage means to turn on an LED lamp or the like disposed on the front surface of the front door 1a or to output a predetermined sound effect from the speaker 8. Etc. to execute a predetermined effect.
In addition, a plurality of terminals t are connected to the sub CPU 211, and a predetermined control signal is transmitted to and received from each part of the control circuit mounted on the sub control board 21 through the terminal t as described above. A predetermined effect such as lighting of the LED lamp is executed.

Further, the control signal input by the sub CPU 211 includes a control command transmitted from the main CPU 111.
The sub CPU 211 inputs the control command at the signal input terminal t41. Then, the sub CPU 211 analyzes the input control command, determines the output pattern of the effect device such as the LED lamp or the speaker 8 based on the analysis result, and determines the output device of the effect device based on the determined output pattern. Execute output control.

  In addition to the sub CPU 211 and the like, the sub control board 21 includes an input circuit 212 having a gate 213 for receiving a control command output from the main CPU 111 and sending it to the sub CPU 211.

The main CPU 111 and output circuit 112 mounted on the main control board 11 and the sub CPU 211 and input circuit 212 mounted on the sub control board 21 are connected in the following configuration.
In the main CPU 111, the signal output terminal t11 is connected to the input terminal t21 of the inverter circuit 113 constituting the output circuit 112.
In the main CPU 111, the power terminal t12 is connected to the power supply unit 114a. Thus, the main CPU 111 is supplied with the power supply voltage VCC from the power supply unit 114a.

In the CMOS used in the inverter circuit 113 constituting the output circuit 112, the PMOS gate and the NMOS gate are connected to an input terminal t21 for inputting a predetermined signal from the outside, and the PMOS drain and the NMOS drain are Connected to the output terminal t22 for outputting a signal to the outside, the source of the PMOS is connected to the first voltage terminal t23 to which a predetermined voltage is applied, and the predetermined voltage is applied to the source of the NMOS. It is connected to the second voltage terminal t24.
In the present embodiment, the CMOS terminals t21 to t24 are connected in the following configuration. That is, the input terminal t21 is connected to the signal output terminal t11 of the main CPU 111, and the output terminal t22 constitutes an input circuit 212 mounted on the sub control board 21 via a connector (not shown) and the signal cable 30. The gate 213 is connected to the input terminal t31.
The first voltage terminal t23 is connected to the power supply unit 114a, and the second voltage terminal t24 is connected to the ground terminal 115. The ground terminal 115 is a ground terminal mounted on the main control board 11, and is connected to the ground (GND).

As for the gate 213 which comprises the input circuit 212 of the sub control board 21, the output terminal t32 is connected to the signal input terminal t41 of the sub CPU 211.
The sub control board 21 is provided with power supply wiring for supplying the power supply voltage VCC indicating a predetermined voltage value as power to the sub CPU 211 and the like.

In the main control board 11 and the sub control board 21 having such a circuit configuration, the main control board 11 and the sub control board 21 are electrically connected to enable transmission of a control command. A signal cable 30 is connected.
Specifically, the signal cable 30 has one end connected to the output terminal t22 of the output circuit 112 via a connector (not shown) mounted on the main control board 11, and the other end connected to the sub-control. The connector is connected to the input terminal t31 of the input circuit 212 via a connector (not shown) mounted on the substrate 21.

In addition, to the signal cable 30 and the connector, an illegal board manufactured for the purpose of an illegal act such as illegally paying out a ball to the slot machine 1 may be attached.
However, even if this illegal board operates and tries to send an illegal command to the sub-control board 21, the illegal impedance is sent because the output impedance of the output circuit 112 mounted on the main control board 11 is low impedance. It cannot be put in.

The reason is as follows.
The control command output from the main CPU 111 is a rectangular wave pulse signal in which the higher potential is “H” and the lower potential is “L”. For this reason, in order to send an illegal command impersonated by the illegal board to the control command to the signal cable 30, it is necessary to vary the voltage applied to the signal cable 30 between H and L.
For example, in order to send an H signal, a voltage is applied to the signal cable 30. As a method of applying this voltage, for example, a resistor is connected to the signal cable 30, and a voltage is applied to the resistor. There is a way.

On the other hand, the output circuit 112 of the main control board 11 uses an inverter circuit 113 having a low output impedance. This means that the resistance value between the output terminal t22 of the inverter circuit 113 and GND is very small.
Here, when the unauthorized board connects a resistor to the signal cable 30, the resistance value of this resistor is larger than the output impedance of the inverter circuit 113. This is because the output impedance of the inverter circuit 113 is very small.
When the illegal substrate applies a voltage to the resistor, most of the voltage drops at the resistor. As a result, the potential of the signal cable 30 cannot be raised, and the logic of the signal cable 30 cannot be changed from L to H.
Therefore, an illegal command cannot be sent from the illegal board to the signal cable 30. As a result, it is possible to avoid a situation in which the game ball is illegally paid out, and to prevent the amusement hall from suffering damage.

Specific numerical values of the output impedance of the output circuit 112 can be set in consideration of the following matters.
(A) Voltage value of power supply voltage VCC (b) Voltage Vh for detecting H from the polarity of the control command
(C) Resistance value Rf of the resistor connected to the signal cable 30 by the illegal board

A value that satisfies the following equation can be set as the output impedance Zout of the output circuit 112.
Zout <{(Vh × Rf) / (VCC−Vh)}
(Formula 1)

The technical meaning represented by Equation 1 will be described with specific numerical values.
As specific numerical values, for example, the power supply voltage VCC is 5 V, the voltage Vh is 3 V, and the resistance value Rf is 10Ω for easy calculation.
When these numerical values are substituted into Equation 1, the output impedance Zout of the output circuit 112 becomes less than 15Ω.
That is, when the output impedance Zout of the output circuit 112 is less than 15Ω, even if the illegal substrate connects a 10Ω resistor to the signal cable 30 and a voltage of 5V is applied thereto, the voltage of the signal cable 30 is Since the voltage does not reach 3V, the logic of the signal cable 30 cannot be changed from L to H, and an illegal command cannot be sent from the illegal board to the signal cable 30.
Thus, the output impedance Zout of the output circuit 112 is set as a value that does not change the polarity of the voltage at the output terminal t22 of the output circuit 112 when a voltage is applied from the unauthorized board to the signal cable 30.

Here, although the resistance value Rf of the resistor connected to the signal cable 30 by the illegal board is 10Ω, this is a temporary value set for easy calculation. Actually, it is difficult to predict the resistance value Rf, and some of them are 10Ω or more, and others are less than 10Ω.
However, if the output impedance Zout of the output circuit 112 is a value smaller than 15Ω, for example, 5Ω or less, even if the resistance value Rf of the resistor connected to the signal cable 30 by the illegal substrate is 5Ω, which is half of 10Ω. The logic of the signal cable 30 cannot be changed from L to H, and an illegal command cannot be sent from the illegal board to the signal cable 30.
Thus, the specific value of the output impedance of the inverter circuit 113 is preferably 5Ω or less, for example, and more preferably 1Ω to several mΩ in order to make it more difficult to send an illegal command. .

Further, most of the commercially available CMOS output impedance is set to about 50 to 100Ω.
On the other hand, the specific numerical value of the output impedance of the inverter circuit 113 described above is “5Ω or less” or “1Ω to several mΩ”.
Thus, the output impedance of the output circuit 112 mounted on the main control board 11 of the present embodiment is a value that is much smaller than the output impedance of a commercially available CMOS.
For this reason, in this embodiment, an impedance of less than 50Ω is referred to as a low impedance.

Furthermore, as described above, most of the commercially available CMOS output impedance is set to about 50 to 100Ω.
For this reason, the output impedance of the output circuit 112 cannot be lowered by simply adopting a commercially available CMOS as the inverter circuit 113 in the output circuit 112.
In order to make the output impedance of the output circuit 112 low, a CMOS that matches the output impedance calculated using Equation 1 or the like is selected and adopted in the output circuit 112.

Here, as an example of a CMOS whose output impedance is low impedance, a motor driver used when rotationally controlling a DC motor can be cited.
A motor driver is an IC in which one or more transistors such as CMOS are incorporated, and when the DC motor connected to the output side as a load rotates or stops and the output current or output voltage of the motor driver fluctuates However, the output impedance is low so that the motor driver is not damaged due to the influence of this fluctuation.
By using this motor driver as the output circuit 112, the output impedance can be made low, and the sending of illegal commands from the illegal board to the signal cable 30 can be prevented.

In this embodiment, the configuration using the inverter circuit 113 that is a CMOS as the output circuit 112 has been described. However, since the output circuit 112 is conditional on at least the output impedance being a low impedance, the inverter circuit including the CMOS It is not limited to 113.
For example, a circuit that inputs and outputs a control command output from the main CPU 111 while receiving supply of voltage from the power supply unit 114a, and a circuit that is connected to the output side of the circuit and has a low impedance ( For example, the output circuit 112 can be configured in combination with an operational amplifier or the like.

[Second embodiment of main control unit and sub-control unit]
Next, a second embodiment of the main control unit and the sub control unit of the present invention will be described with reference to FIGS.
Compared with the first embodiment, this embodiment is provided with a change detection unit on the main control board for detecting that an illegal board is connected to the signal cable, and a fuse is provided as a specific example of this change detection unit. The point is different. Other components are the same as those in the first embodiment.
Therefore, in FIG. 5 to FIG. 8, the same components as those in FIG.

A main CPU 111, an output circuit 112, and a change detection unit 116 are disposed on the main control board 11 of the main control unit 10 in the present embodiment.
The output circuit 112 can use the inverter circuit 113 as a circuit whose output impedance on the side of outputting a control command is low impedance.

  The change detection unit 116 detects that an illegal board, which is a board created for the purpose of causing the slot machine 1 to execute an illegal operation such as illegally paying out a ball against a regular slot machine game, is a signal cable. The electrical circuit generated in the wiring, circuit, electronic component, etc. connected to the output circuit 112 as a result of being connected to the output circuit 112 or by being connected to the signal cable 30 and executing a predetermined illegal operation. A circuit or component that detects a change. In the present embodiment, the fuse 117 (117a, 117b) is used as the change detection unit 116.

The fuse 117 is a component for overcurrent protection or overheat protection that blows itself and cuts a circuit when a current of a predetermined value or more flows.
The fuse 117 is connected to wiring or a circuit connected to the output circuit 112 on the main control board 11. Specifically, as shown in FIG. 6, a fuse 117 a is connected to a wiring for supplying the power supply voltage VCC to the inverter circuit 113 that is the output circuit 112. Further, a fuse 117b is connected to a wiring connecting the inverter circuit 113 and the ground terminal 115 mounted on the main control board 11.
More specifically, one end of the fuse 117a is connected to the first voltage terminal t23 of the inverter circuit 113 which is the output circuit 112, and the other end is connected to the power supply unit 114a. Further, one end of the fuse 117b is connected to the second voltage terminal t24 of the inverter circuit 113 which is the output circuit 112, and the other end is connected to the ground terminal 115 mounted on the main control board 11 and grounded. ing.

  As described above, by connecting the fuse 117 to the wiring connected to the output circuit 112, when the illegal board is connected to the signal cable 30, or when the illegal board executes a predetermined illegal operation, the output is performed. An electrical change in which a large amount of current flows through the wiring connected to the circuit 112 causes the fuse 117 to melt and detect the illegal substrate.

Operations of the main control board 11 and the sub control board 21 of the present embodiment that exhibit such excellent effects will be described with reference to FIGS.
Here, the following items will be described in order.
(1) Normal state (2) Unauthorized board connection state

(1) Normal state In a normal state where an illegal board is not connected to the signal cable 30 or the like, the main control board 11 and the sub control board 21 perform the following operations.

  The main CPU 111 of the main control board 11 outputs a control command from the signal output terminal t11 at a predetermined timing. The control command is a signal that represents one command with a predetermined number of pulses (for example, eight pulses).

In the inverter circuit 113 of the output circuit 112, supply of the voltage VCC from the power supply unit 114a is received at the first voltage terminal t23.
The inverter circuit 113 inputs the control command sent from the main CPU 111 at the input terminal t21.
Here, when the inverter circuit 113 receives a control command indicating that the potential sent from the main CPU 111 is L at the input terminal t21, the inverter circuit 113 turns on the PMOS-FET and turns off the NMOS-FET. Then, an H control command having substantially the same potential as VCC which is the potential of the first voltage terminal t23 is output from the output terminal t22 and sent to the input circuit 212 of the sub-control board 21.

When the inverter circuit 113 receives a control command having a potential of H at the input terminal t21, the PMOS-FET of the inverter circuit 113 is turned off, the NMOS-FET is turned on, and the grounded second voltage terminal A control command of zero, that is, L potential, which is the same potential as t24, is output from the output terminal t22 and sent to the input circuit 212 of the sub-control board 21.
In this way, the inverter circuit 113 of the output circuit 112 inverts the polarity of the control command input at the input terminal t21 and outputs it from the output terminal t22.

The gate 213 constituting the input circuit 212 of the sub control board 21 outputs the control command input at the input terminal t31 from the output terminal t32 and sends it to the sub CPU 211.
The sub CPU 211 inputs the control command output from the output terminal t32 of the input circuit 212 at the signal input terminal t41.
Then, the sub CPU 211 analyzes the input control command, and executes predetermined presentation control based on the analysis result.

When the main CPU 111 does not output a control command, the output circuit 112 does not input a control command at the input terminal t21, and therefore does not output a control command from the output terminal t22.
In this case, the gate 213 of the input circuit 212 mounted on the sub-control board 21 does not output a control command from the output terminal t32 because the control command is not input at the input terminal t31. Thereby, since the sub CPU 211 does not input the control command at the signal input terminal t41, the sub CPU 211 does not execute the effect control based on the control command.

Further, in this normal state, the fuses 117a and 117b are not melted. The reason is as follows.
For example, the power supply voltage VCC indicating a predetermined voltage value is applied from the power supply unit 114a to the first voltage terminal t23 of the inverter circuit 113 constituting the output circuit 112 of the main control board 11. When a control command indicating a potential H is input to the input terminal t21 of the inverter circuit 113, the CMOS PMOS-FET constituting the inverter circuit 113 is turned off. Almost no current flows through the wiring connected to the first voltage terminal t23, and almost no current flows through the fuse 117a connected to the wiring.
On the other hand, when a control command whose potential is L is inputted to the input terminal t21 of the inverter circuit 113, the PMOS-FET of the CMOS is turned on. The potential of the output terminal t22 of the inverter circuit 113 is H, which is the same potential as the voltage VCC. That is, since the power supply voltage VCC output from the power supply unit 114a and the potential of the output terminal t22 of the inverter circuit 113 are the same potential, almost no current flows through the wiring connected between them, and the fuse 117a connected to the wiring is connected. However, almost no current flows.
For this reason, the fuse 117a is not blown in a normal state.

In this normal state, when a control command indicating a potential H is input to the input terminal t21 of the inverter circuit 113 that constitutes the output circuit 112 of the main control board 11, the NMOS-FET of the inverter circuit 113 is turned off. Therefore, almost no current flows through the fuse 117b connected to the second voltage terminal t24.
On the other hand, when a control command whose potential is L is input to the input terminal t21 of the inverter circuit 113, the NMOS-FET of the inverter circuit 113 is turned on, but the second voltage terminal t24 is connected via the fuse 117b. Since the grounding terminal 115 is connected and the potential of the output terminal t22 of the CMOS becomes L of zero, almost no current flows through the fuse 117b.
For this reason, the fuse 117b is not blown in a normal state.

(2) Unauthorized board connection state Here, the operation of the main control board 11 and the sub control board 21 when an unauthorized board is connected to the signal cable 30 or the connector or when this unauthorized board is operated will be described.

There are various types of illegal operations performed by a circuit mounted on an illegal substrate, but there are the following two types as typical ones.
For example, as a first type, the control command transmitted from the main CPU 111 to the sub control board 21 through this signal cable 30 is deleted by short-circuiting (grounding) the signal cable 30 to the ground (GND). The sub-CPU 211 makes the sub CPU 211 unable to recognize the game state advantageous to the player, which is the state indicated by the control command, and continues the game state advantageous to the player afterwards, Some conduct illegal activities such as paying out money.
Further, as a second type, there is a type in which a pseudo illegal command disguised as a normal control command is sent to the sub control board 21 through the signal cable 30 by applying a predetermined voltage to the signal cable 30.
A case where the first type of illegal substrate is connected and a case where the second type of illegal substrate is connected will be described in order.

(I) When the first type of illegal board is connected When this type of illegal board is connected to the signal cable 30, the signal cable 30 is short-circuited to the ground (GND) as shown in FIG. Therefore, the potential of the signal cable 30 becomes zero. The potential of the output terminal t22 of the inverter circuit 113 to which the signal cable 30 is connected is also zero.
In this state, when a control command is output from the main CPU 111, when a control command having a potential of L is input to the input terminal t 21 of the inverter circuit 113 constituting the output circuit 112, the CMOS of the inverter circuit 113 is connected. Since the PMOS-FET is turned on and the resistance between the source and drain of the PMOS-FET is lowered, the power supply unit 114a that supplies the power supply voltage VCC, the fuse 117a, the first voltage terminal t23 of the inverter circuit 113, and the output terminal t22. The current flows through the signal cable 30 to the ground (GND) of the illegal board.

The value of this current is almost determined by the power supply voltage VCC and the source-drain resistance (Rds) of the PMOS-FET. For example, when the voltage VCC is 5V and the resistance Rds is 1Ω, the current is 5A. When the voltage VCC is 5V and the resistance Rds is 0.1Ω, the current is 50A.
Assuming such a current value, a fuse that blows when this current flows is connected as a fuse 117a between the first voltage terminal t23 of the inverter circuit 113 and the power supply unit 114a. As a result, when the illegal board is connected to the signal cable 30 and the signal cable 30 is short-circuited to the ground (GND), a current of a predetermined value or more flows through the fuse 117a, so that the illegal board is connected. Can be detected.

As described above, when a large amount of current flows through the fuse 117a, the power supply unit 114a detects the large amount of current and sends a reset signal to the main CPU 111. Therefore, the main CPU 111 is reset and the game being executed Stops.
Therefore, even when the illegal board short-circuits the signal cable 30 to the ground, it is possible to avoid or suppress the situation where the ball is illegally paid out, and the situation where the game hall suffers damage can be prevented.

  Further, in the main control board 11, since the main CPU 111 is reset, no control command is output from the main CPU 111. On the other hand, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. For example, the lighting control of the LED lamp, which has been executed when the game is stopped, is continuously performed thereafter, and the LED lamp remains turned on or repeatedly blinks. Further, on the liquid crystal display 9 (see FIG. 1) provided above the front surface of the front door 1a, the screen displayed when the game is stopped continues to be displayed as it is thereafter. A player who has visually observed such an effect or a store clerk at the game hall can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality.

(Ii) When a second type of illegal board is connected The second type of illegal board outputs an illegal command to the connected signal cable 30 and sends it to the sub-control board 21.
When this type of illegal board is connected to the signal cable 30, the following state occurs in the illegal board or the main control board 11 and the sub control board 21.
(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. (ii-2) An illegal board is detected when the fuse 117 is blown. These states will be described in order.

(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. In the inverter circuit 113 constituting the output circuit 112 of the main control board 11, the output impedance is low impedance. It is impossible to send an illegal command from the illegal board to the signal cable 30.
Since this point has already been described in the first embodiment, a description thereof is omitted here.

(Ii-2) Detecting an illegal board by fusing fuse 117 As shown in FIG. 8, a second type of illegal board is connected to signal cable 30, and this illegal board tries to send an illegal command. When the voltage VCC is applied to the signal cable 30, the main control board 11 operates as follows.
An illegal command is normally sent when the control command is not output from the main CPU 111. In this standby state, when a signal indicating the potential H is output from the main CPU 111, the CMOS NMOS-FET is turned on in the inverter circuit 113 constituting the output circuit 112 of the main control board 11.
In this case, when a voltage VCC is applied to the signal cable 30 to send an illegal command to the illegal board, the output impedance of the inverter circuit 113 is very small, and the NMOS-FET of the CMOS is turned on. Therefore, the current from the illegal substrate flows into the output terminal t22 of the inverter circuit 113, passes through the drain and source of the NMOS-FET, passes through the second voltage terminal t24, the fuse 117b, and the grounding terminal 115. Flow into the ground.

The value of this current is substantially determined by the voltage VCC and the resistance (Rds) between the source and drain of the NMOS-FET. For example, when the voltage VCC is 5V and the resistance Rds is 1Ω, the current is 5A. When the voltage VCC is 5V and the resistance Rds is 0.1Ω, the current is 50A.
Assuming such a current value, a fuse that blows when this current flows is connected as a fuse 117b between the second voltage terminal t24 of the inverter circuit 113 and the ground terminal 115 of the main control board 11. As a result, when an unauthorized board is connected to the signal cable 30 and a voltage VCC is applied to the signal cable 30, a current of a predetermined value or more flows through the fuse 117b, so that the unauthorized board is detected. it can.

In addition, when a large current flows through the fuse 117b as described above, the large current flows through the fuse 117a by being attracted by the large current. And since the power supply part 114a detects the enormous current and sends a reset signal to the main CPU 111, the main CPU 111 is reset and the game being executed is stopped.
Therefore, even when the unauthorized board applies a voltage to the signal cable 30, it is possible to avoid the situation where the ball is illegally paid out, and the situation where the game hall suffers damage can be prevented.
Further, in the main control board 11, since the main CPU 111 is reset, no control command is output from the main CPU 111. On the other hand, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. A player or a store clerk who visually observes the effect of repeating such an operation can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality. .

[Third embodiment of main control unit and sub control unit]
Next, a third embodiment of the main control unit and the sub control unit of the present invention will be described with reference to FIGS.
Compared with the first embodiment, this embodiment is provided with a change detection unit on the main control board for detecting that an illegal board is connected to the signal cable, and a fuse is provided as a specific example of this change detection unit. The point is different. Further, the present embodiment is different from the second embodiment in the connection position of the fuse serving as the change detection unit. That is, in the second embodiment, a fuse is connected to each of the first voltage terminal and the second voltage terminal of the output circuit, whereas in this embodiment, the output terminal of the output circuit and the signal cable are connected to each other. A fuse is connected between them. Other components are the same as those in the first embodiment and the second embodiment.
Therefore, in FIGS. 9-11, the same code | symbol is attached | subjected about the component similar to FIG. 1, etc., and the detailed description is abbreviate | omitted.

A main CPU 111, an output circuit 112, and a change detection unit 116 are disposed on the main control board 11 of the main control unit 10 in the present embodiment.
The output circuit 112 can use the inverter circuit 113 as a circuit whose output impedance on the side of outputting a control command is low impedance.

The change detection unit 116 is a circuit or an electronic component that detects that an illegal board is connected to the signal cable 30 or that this illegal board has been operated. In the present embodiment, the change detection unit 116 is a fuse. 117c is used.
The fuse 117c is connected on the main control board 11 between the output terminal t22 of the inverter circuit 113 constituting the output circuit 112 and the signal cable 30.

  In the second embodiment, the fuse 117a constituting the change detection unit 116 is connected between the first voltage terminal t23 of the inverter circuit 113 and the power supply unit 114a, and the fuse 117b is connected to the first circuit of the inverter circuit 113. Although the connection is made between the two voltage terminal t24 and the grounding terminal 115, in the present embodiment, the fuses 117a and 117b are not connected.

In the main control board 11 and the sub control board 21 having such a circuit configuration, an illegal board may be attached to the signal cable 30 or the connector that connects the main control board 11 and the sub control board 21. .
However, even when such an illegal board is connected to the signal cable 30 or the like, the change of the main control board 11 indicates that this illegal board has been connected or that this illegal board has performed a predetermined illegal operation. Detected when the fuse 117c constituting the detection unit 116 is blown, the main CPU 111 is reset, the game being executed is stopped, illegal payout of the game is prevented, and the game hall suffers damage Can be avoided or suppressed.

Operations of the main control board 11 and the sub control board 21 of the present embodiment that exhibit such excellent effects will be described with reference to FIGS.
The operations of the main control board 11 and the sub control board 21 in a normal state where the unauthorized board is not connected to the signal cable 30 or the like have been described in the item “(1) Normal state” in the second embodiment. Since it is the same as the contents, description here is omitted.
Here, the operation of the main control board 11 and the sub control board 21 when an illegal board is connected to the signal cable 30 or the connector or when the illegal board is operated will be described.

(I) When the first type of illegal board is connected The first type of illegal board is connected to the main CPU 111 through the signal cable 30 by short-circuiting (grounding) the signal cable 30 to the ground (GND). The control command transmitted to the control board 21 is deleted, and the gaming state advantageous to the player is illegally continued.

When this type of illegal board is connected to the signal cable 30, as shown in FIG. 10, the signal cable 30 is short-circuited to the ground (GND) on the illegal board, so that the potential of the signal cable 30 is zero. Become. The potential of the output terminal t22 of the inverter circuit 113 to which the signal cable 30 is connected is also zero.
In this state, when a control command is output from the main CPU 111, when a control command having a potential of L is input to the input terminal t 21 of the inverter circuit 113 constituting the output circuit 112, the CMOS of the inverter circuit 113 is connected. Since the PMOS-FET is turned on and the resistance between the source and drain of the PMOS-FET is lowered, the first voltage terminal t23 of the inverter circuit 113, the output terminal t22, the fuse 117c, from the power supply unit 114a that supplies the voltage VCC. A current flows through the signal cable 30 to the ground (GND) of the illegal board.
The value of this current is substantially determined by the voltage VCC and the source-drain resistance (Rds) of the PMOS-FET. For example, when the voltage VCC is 5V and the resistance Rds is 1Ω, the current is 5A.
Assuming such a current value, a fuse that blows when this current flows is connected as a fuse 117c between the output terminal t22 of the inverter circuit 113 and the signal cable 30. As a result, when an illegal board is connected to the signal cable 30 and the signal cable 30 is short-circuited to the ground (GND), current flows through the fuse 117c, so that it can be detected that the illegal board is connected.

As described above, when a large amount of current flows through the fuse 117c, the power supply unit 114a detects the large amount of current and sends a reset signal to the main CPU 111, so that the main CPU 111 is reset and the game being executed Stops.
Therefore, even when the illegal board short-circuits the signal cable 30 to the ground, it is possible to avoid a situation in which the ball is illegally paid out, and to prevent a situation where the game hall suffers damage.
Further, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. A player or a store clerk who visually observes the effect of repeating such an operation can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality. .

(Ii) When a second type of illegal board is connected The second type of illegal board outputs an illegal command to the connected signal cable 30 and sends it to the sub-control board 21.
When this type of illegal board is connected to the signal cable 30, the following state occurs in the illegal board or the main control board 11 and the sub control board 21.
(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. (ii-2) An illegal board is detected when the fuse 117c is blown. These states will be described in order.

(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. In the inverter circuit 113 constituting the output circuit 112 of the main control board 11, the output impedance is low impedance. It is impossible to send an illegal command from the illegal board to the signal cable 30.
Since this point has already been described in the first embodiment, a description thereof is omitted here.

(Ii-2) Detecting an illegal substrate by fusing fuse 117c As shown in FIG. 11, a second type of illegal substrate is connected to signal cable 30, and this illegal substrate attempts to send an illegal command. When the voltage VCC is applied to the signal cable 30, the main control board 11 operates as follows.
An illegal command is normally sent when the control command is not output from the main CPU 111. In this standby state, when a signal indicating the potential H is output from the main CPU 111, the CMOS NMOS-FET is turned on in the inverter circuit 113 constituting the output circuit 112 of the main control board 11.
In this case, when a voltage VCC is applied to the signal cable 30 to send an illegal command to the illegal board, the output impedance of the inverter circuit 113 is very small, and the NMOS-FET of the CMOS is turned on. Therefore, the current from the illegal substrate flows into the output terminal t22 of the inverter circuit 113 through the fuse 117c, passes through the drain and source of the NMOS-FET, and passes through the second voltage terminal t24 and the ground terminal 115. Through and into the ground.

The value of this current is substantially determined by the voltage VCC and the resistance (Rds) between the source and drain of the NMOS-FET. For example, when the voltage VCC is 5V and the resistance Rds is 1Ω, the current is 5A.
Assuming such a current value, a fuse that blows when this current flows is connected as a fuse 117c between the output terminal t22 of the inverter circuit 113 and the signal cable 30. As a result, when the unauthorized board is connected to the signal cable 30 and the voltage VCC is applied to the signal cable 30, current flows through the fuse 117c, so that the unauthorized board is connected.

As described above, when a large amount of current flows through the fuse 117c, the power supply unit 114a detects the large amount of current and sends a reset signal to the main CPU 111, so that the main CPU 111 is reset and the game being executed Stops.
Therefore, even when the unauthorized board applies a voltage to the signal cable 30, it is possible to avoid the situation where the ball is illegally paid out, and the situation where the game hall suffers damage can be prevented.
Further, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. A player or a store clerk who visually observes the effect of repeating such an operation can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality. .

[Fourth Embodiment of Main Control Unit and Sub Control Unit]
Next, a fourth embodiment of the main control unit and the sub control unit of the present invention will be described with reference to FIGS.
Compared with the first embodiment, the present embodiment is provided with a change detection unit on the main control board for detecting that an illegal board is connected to the signal cable, and a voltage detection circuit as a specific example of the change detection unit. Is different.
Further, this embodiment is different from the first embodiment in that a stabilized power supply circuit is provided. That is, in the first embodiment, the power supply unit that supplies the power supply voltage to the main CPU and the power supply unit that supplies the voltage to the inverter circuit of the output circuit are configured by a single power supply unit. A power supply unit that supplies a power supply voltage to the main CPU and a power supply unit that supplies a voltage to the inverter circuit of the output circuit are individually provided. Other components are the same as those in the first embodiment.
Accordingly, in FIGS. 12 to 15, the same components as those in FIG. 1 and the like are denoted by the same reference numerals, and detailed description thereof is omitted.

A main CPU 111, an output circuit 112, a change detection unit 116, and a stabilized power supply circuit 114b are disposed on the main control board 11 of the main control unit 10 in the present embodiment.
The output circuit 112 can use the inverter circuit 113 as a circuit whose output impedance on the side of outputting a control command is low impedance.

The change detection unit 116 is connected to the output circuit 112 when the unauthorized board is connected to the signal cable 30 or when the unauthorized board is connected to the signal cable 30 and performs a predetermined unauthorized operation. A circuit or a component for detecting an electrical change occurring in a circuit, an electronic component or the like. In the present embodiment, a voltage detection circuit 118 a is used as the change detection unit 116.
The voltage detection circuit 118a monitors the voltage on the wiring connected to the output circuit 112, and outputs a reset signal when detecting that the voltage value has changed below a predetermined voltage value or above a predetermined voltage value. It is a monitoring circuit or a reset circuit.

For example, a circuit including a comparator can be used as the voltage detection circuit 118a.
A comparator is a circuit that compares two voltages or two currents and switches the output when one is large and the other is large.
Specifically, the voltage detection circuit 118a including the comparator includes a voltage terminal t51 that inputs a voltage VDD that is a reference voltage, an input terminal t52 that inputs a voltage to be detected, and a reset terminal t53 that outputs a reset signal. It has. Then, the reference voltage VDD input to the voltage terminal t51 is compared with the voltage input to the input terminal t52, and when this voltage becomes lower than the reference voltage VDD, a voltage serving as a reset signal is output from the reset terminal t53. .

The input terminal t52 of the voltage detection circuit 118a is connected to the first voltage terminal t23 of the inverter circuit 113 that constitutes the output circuit 112.
The first voltage terminal t23 is supplied with the voltage VCC from the stabilized power supply circuit 114b, and the state where the voltage VCC is applied is maintained in a normal state in which the illegal board is not connected to the signal cable 30. ing. However, when an unauthorized board is connected to the signal cable 30 and the signal cable 30 is short-circuited to the ground, a current flows from the stabilized power supply circuit 114b through the first voltage terminal t23 of the inverter circuit 113 to the unauthorized board. Since a voltage drop occurs in the resistor R1 connected on this path, the voltage detection circuit 118a detects the voltage drop and sends a reset signal to the main CPU 111 to stop the game being executed.

In the circuit shown in FIG. 12, the voltage detection circuit 118a is connected to the first voltage terminal t23 side of the inverter circuit 113 that is the output circuit 112. For example, as shown in FIG. The voltage detection circuit 118b can be connected to the second voltage terminal t24 side.
This voltage detection circuit 118b has the same function as the voltage detection circuit 118a, and outputs a reset signal when it detects that the voltage of the wiring connected to the second voltage terminal t24 of the inverter circuit 113 has fluctuated. To the main CPU 111.

As the voltage detection circuit 118b, for example, a circuit including a comparator can be used.
Specifically, the voltage detection circuit 118b includes a voltage terminal t51 that inputs a voltage VDD that is a reference voltage, an input terminal t52 that inputs a voltage to be detected, and a reset terminal t53 that outputs a reset signal. . Then, the reference voltage VDD input to the voltage terminal t51 is compared with the voltage input to the input terminal t52. When this voltage becomes higher than the reference voltage VDD, a voltage serving as a reset signal is output from the reset terminal t53. .

The input terminal t52 of the voltage detection circuit 118b is connected to the second voltage terminal t24 of the inverter circuit 113 that constitutes the output circuit 112.
The second voltage terminal t24 is connected to the grounding terminal 115 and grounded. In a normal state in which the illegal board is not connected to the signal cable 30, the state where the potential is zero is maintained. However, when an unauthorized board is connected to the signal cable 30 and the voltage VCC is applied to the signal cable 30, the unauthorized board passes through the output terminal t 22, the second voltage terminal t 24, and the grounding terminal 115 of the inverter circuit 113. , Current flows to ground. Since a voltage is generated in the resistor R2 connected on this path, the voltage detection circuit 118b detects the voltage and sends a reset signal to the main CPU 111 to stop the game being executed.

The stabilized power supply circuit 114b is a circuit that converts (drops) an externally input voltage to a predetermined voltage value and supplies a voltage indicating a constant voltage value to a predetermined circuit as a power supply or the like.
In the present embodiment, the stabilized power supply circuit 114b converts the voltage input from the outside of the main control board 11 into a voltage VCC indicating a predetermined voltage value and outputs the voltage VCC, and outputs the first voltage terminal in the inverter circuit 113 of the output circuit 112. Apply at t23.
For example, a linear regulator or a switching regulator can be used for the stabilized power circuit 114b. As the linear regulator, a series regulator, a three-terminal regulator, or the like can be used.
Above all, the three-terminal regulator has a simple structure with three terminals: an input terminal (IN), an output terminal (OUT), and a ground terminal (GND) (or a common terminal (COM)). Are stable, free from noise, and inexpensive, and are useful as a stabilized power supply circuit 114b mounted on the main control board 11.

As described above, in the present embodiment, the stabilized power supply circuit 114b is mounted on the main control board 11, and the voltage output from the stabilized power supply circuit 114b is supplied to the inverter circuit 113 constituting the output circuit 112. It is said.
The main CPU 111 mounted on the same main control board 11 is supplied with the power supply voltage VCC from the power supply unit 114a as in the main CPU 111 of the first to third embodiments.
That is, the power supply unit 114a that supplies the power supply voltage VCC to the main CPU 111 and the stabilized power supply circuit 114b that is the power supply unit that supplies the voltage VCC to the inverter circuit 113 are provided individually.

Here, in the second embodiment, a fuse 117a is connected between the power supply unit 114a and the first voltage terminal t23 of the inverter circuit 113, and when a large amount of current flows to blow the fuse 117a, The unit 114a detects the current and sends a reset signal to the main CPU 111 to stop the game being executed.
In contrast, in the present embodiment, the power supply unit 114a and the stabilized power supply circuit 114b are separated, and the stabilized power supply circuit 114b and the first voltage terminal t23 of the inverter circuit 113 are connected. The power supply unit 114a is not connected to the first voltage terminal t23 of the inverter circuit 113. For this reason, even if a large current flows through the first voltage terminal t23 of the inverter circuit 113, since the large current cannot be detected by the power supply unit 114a, the main CPU 111 is not reset and the game being executed does not stop. .
However, the main control board 11 of the present embodiment includes a voltage detection circuit 118a as the change detection unit 116. When a large current flows through the first voltage terminal t23 of the inverter circuit 113, the voltage detection circuit 118a detects a voltage drop in the resistor R1 connected to the first voltage terminal t23, and sends a reset signal to the main CPU 111. send. Thereby, since the main CPU 111 is reset, the game being executed can be stopped.

The stabilized power supply circuit 114b and the voltage detection circuits 118a and 118b are connected on the main control board 11 in the following configuration.
In the stabilized power supply circuit 114b, the input terminal t61 is connected to a device that supplies power (for example, the power supply device 6 or a power supply board (not shown)), and the output terminal t62 is connected to one end of the resistor R1. Yes.
The other end of the resistor R1 is connected to the first voltage terminal t23 of the inverter circuit 113 that constitutes the output circuit 112.

In the voltage detection circuit 118a, the input terminal t52 is connected between the other end of the resistor R1 and the first voltage terminal t23 of the inverter circuit 113, and the reset terminal t53 is connected to the reset terminal t13 of the main CPU 111. Yes. The power supply voltage VDD is applied to the voltage terminal t51 of the voltage detection circuit 118a.
In the voltage detection circuit 118b, the input terminal t52 is connected between the second voltage terminal t24 of the inverter circuit 113 and one end of the resistor R2, and the reset terminal t53 is connected to the reset terminal t14 of the main CPU 111. . The power supply voltage VDD is applied to the voltage terminal t51 of the voltage detection circuit 118b.
The other end of the resistor R2 is connected to the ground terminal 115 and is grounded.

A gate 119 is connected between the signal output terminal t11 of the main CPU 111 and the input terminal t21 of the inverter circuit 113 of the output circuit 112.
Other connection configurations of the main control board 11 and the sub control board 21 are the same as other connection configurations of the main control board 11 and the sub control board 21 in the first embodiment.

In the main control board 11 and the sub control board 21 having such a circuit configuration, an illegal board may be attached to the signal cable 30 or the connector that connects the main control board 11 and the sub control board 21. .
However, even when such an illegal board is connected to the signal cable 30, it is detected that the illegal board has been connected or that the illegal board has performed a predetermined illegal operation. The voltage detection circuits 118a and 118b, which are the unit 116, detect, and the voltage detection circuits 118a and 118b send a reset signal to the main CPU 111, so that the main CPU 111 is reset, and the game being executed is stopped and illegal. It is possible to prevent or control the situation where the game hall suffers damage by preventing the payout of a lot of balls.

Operations of the main control board 11 and the sub control board 21 of the present embodiment that exhibit such excellent effects will be described with reference to FIGS.
Here, the following items will be described in order.
(1) Normal state (2) Unauthorized board connection state

(1) Normal state The operation of the main control board 11 and the sub control board 21 in a normal state in which the illegal board is not connected to the signal cable 30 or the like is basically “(1) normal state in the second embodiment. ”Is the same as the content described in the item“, ”and the description thereof is omitted here.
Here, as a difference from the second embodiment, the operation of the voltage detection circuits 118a and 118b in a normal state will be described.

The first voltage terminal t23 of the inverter circuit 113 constituting the output circuit 112 is supplied with the voltage VCC from the stabilized power supply circuit 114b, and in the normal state where the unauthorized board is not connected to the signal cable 30, the voltage The state where VCC is applied is maintained.
The voltage detection circuit 118a receives the voltage of the first voltage terminal t23 of the inverter circuit 113 at the input terminal t52 and compares it with the reference voltage VDD. Since the input voltage exceeds the reference voltage VDD, the reset signal is not output from the reset terminal t53.
As a result, since the reset signal is not input to the reset terminal t13, the main CPU 111 executes a normal slot machine game as a normal state where no reset is applied.

Further, the second voltage terminal t24 of the inverter circuit 113 constituting the output circuit 112 is connected to the grounding terminal 115, and in the normal state where the illegal board is not connected to the signal cable 30, the second voltage terminal t24 is connected. The potential at t24 is zero.
The voltage detection circuit 118b inputs the potential of the second voltage terminal t24 of the inverter circuit 113 at the input terminal t52 and compares it with the reference voltage VDD. Since the input voltage is lower than the reference voltage VDD, the reset signal is not output from the reset terminal t53.
As a result, the main CPU 111 executes a normal slot machine game as a normal state in which no reset is applied since no reset signal is input to the reset terminal t14.

(2) Unauthorized board connection state Here, when an unauthorized board is connected to the signal cable 30 connecting the main control board 11 and the sub-control board 21 or the connector connected to the end of the signal cable 30, or The operation of the main control board 11 and the sub control board 21 when this unauthorized board is operated will be described.

(I) When the first type of illegal board is connected The first type of illegal board is connected to the main CPU 111 through the signal cable 30 by short-circuiting (grounding) the signal cable 30 to the ground (GND). The control command transmitted to the control board 21 is deleted, and the gaming state advantageous to the player is illegally continued.

When this type of illegal board is connected to the signal cable 30, as shown in FIG. 14, the signal cable 30 is short-circuited to the ground (GND) on the illegal board, so that the potential of the signal cable 30 is zero. Become. The potential of the output terminal t22 of the inverter circuit 113 to which the signal cable 30 is connected is also zero.
In this state, when a control command is output from the main CPU 111, when a control command having a potential of L is input to the input terminal t 21 of the inverter circuit 113 constituting the output circuit 112, the CMOS of the inverter circuit 113 is connected. Since the PMOS-FET is turned on and the resistance between the source and drain of the PMOS-FET is lowered, the resistor R1, the first voltage terminal t23 of the inverter circuit 113, the output terminal are supplied from the stabilized power supply circuit 114b that supplies the voltage VCC. At t22, the current flows through the signal cable 30 to the ground (GND) of the illegal board.
When current flows through such a path, a voltage drop occurs in the resistor R1. The voltage detection circuit 118a connected to the other end of the resistor R1 inputs the lowered voltage at the input terminal t52, compares it with the reference voltage VDD, and the lowered voltage falls below the reference voltage VDD. Is output from the reset terminal t53. Thereby, it can be detected that an unauthorized substrate is connected.

When the main CPU 111 inputs a reset signal at the reset terminal t13, the main CPU 111 is reset and stops the game being executed.
Therefore, even when the illegal board short-circuits the signal cable 30 to the ground, it is possible to avoid a situation in which the ball is illegally paid out, and to prevent a situation where the game hall suffers damage.
Further, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. A player or a store clerk who visually observes the effect of repeating such an operation can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality. .

(Ii) When a second type of illegal board is connected The second type of illegal board outputs an illegal command to the connected signal cable 30 and sends it to the sub-control board 21.
When this type of illegal board is connected to the signal cable 30, the following state occurs in the illegal board or the main control board 11 and the sub control board 21.
(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. (ii-2) The illegal board is detected by the operation of the voltage detection circuit 118b. These states will be described in order.

(Ii-1) An illegal command cannot be sent from the illegal board to the signal cable 30. In the inverter circuit 113 constituting the output circuit 112 of the main control board 11, the output impedance is low impedance. It is impossible to send an illegal command from the illegal board to the signal cable 30.
Since this point has already been described in the first embodiment, a description thereof is omitted here.

(Ii-2) An illegal board is detected by the operation of the voltage detection circuit 118b. As shown in FIG. 15, a second type of illegal board is connected to the signal cable 30, and this illegal board sends an illegal command. As another example, when the voltage VCC is applied to the signal cable 30, the main control board 11 operates as follows.
An illegal command is normally sent when the control command is not output from the main CPU 111. In this standby state, when a signal indicating the potential H is output from the main CPU 111, the CMOS NMOS-FET is turned on in the inverter circuit 113 constituting the output circuit 112 of the main control board 11.
In this case, when a voltage VCC is applied to the signal cable 30 to send an illegal command to the illegal board, the output impedance of the inverter circuit 113 is very small, and the NMOS-FET of the CMOS is turned on. Therefore, the current from the illegal substrate flows into the output terminal t22 of the inverter circuit 113, passes through the drain and source of the NMOS-FET, passes through the second voltage terminal t24, the resistor R2, and the grounding terminal 115. Flow into the ground.

  When current flows through such a path, a voltage is generated at the resistor R2. The voltage detection circuit 118b connected to one end of the resistor R2 inputs the generated voltage at the input terminal t52 and compares it with the reference voltage VDD. When the generated voltage exceeds the reference voltage VDD, the reset signal is output. Output from the reset terminal t53. Thereby, it can be detected that an unauthorized substrate is connected.

When the main CPU 111 inputs a reset signal at the reset terminal t14, the main CPU 111 is reset and stops the game being executed.
Therefore, even when the unauthorized board is applied with the voltage VCC to the signal cable 30, it is possible to avoid the situation where the ball is illegally paid out, and the situation where the game hall suffers damage can be prevented.
Further, in the sub control board 21, since the power supply voltage VCC is supplied to the sub CPU 211 and the like, the operation according to the effect control program is continued. However, since the control command is not sent from the main control board 11, the control command is not overwritten on the sub-control board 21, and the effect when the game is stopped is continuously performed after that. A player or a store clerk who visually observes the effect of repeating such an operation can know that an abnormality has occurred in the slot machine 1, and the store clerk can take appropriate measures against this abnormality. .

  As described above, according to the gaming machine of the present embodiment, since the output impedance of the output circuit mounted on the main control board is low impedance, even if the illegal board is connected to the signal cable, The illegal command cannot be sent to the sub-control board. As a result, it is possible to avoid a situation in which the game balls are illegally paid out, and to prevent a situation where the game hall suffers damage.

In addition, since the main control board is equipped with a change detection unit that detects electrical changes that occur in the circuit on the main control board due to the unauthorized board being connected to the signal cable, the unauthorized board is connected to the signal cable. Can be detected.
In addition, if an illegal board connected to the cable is detected, the CPU on the main control board is reset, and the game being executed is stopped. It is possible to avoid a situation in which the game is paid out, and it is possible to suppress the situation where the game hall suffers damage.
In addition, the change detection unit can detect this connection not only when an unauthorized board sends an unauthorized command to the sub-control board but also when an unauthorized board that erases a control command output from the main control board is connected to the cable.

  Moreover, in order to realize the main control board and the sub control board of this embodiment, the configuration of the circuit mounted on the main control board may be changed, such as providing a change detection unit on the main control board, There is almost no need to newly develop a program to drive or a program to drive a sub CPU, and since a program that has been used in the past can be used as it is, the labor required for program development is reduced. However, effective fraud prevention technology can be realized.

  The configuration of the main control board and the sub control board in this embodiment is such that the output impedance of the output circuit mounted on the main control board is set to a low impedance, and a change detection unit is provided on the main control board. It does not newly add transmission of a data signal from the board to the main control board. In other words, since the present invention complies with unidirectional data communication from the main control board to the sub control board, the present invention can also be applied to existing game machine models and new game machine models. Can do.

The preferred embodiment of the gaming machine of the present invention has been described above, but the gaming machine according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. Needless to say.
For example, in the above-described embodiment, the slot machine is given as an example of the gaming machine to which the present invention is applied. However, the gaming machine to which the present invention is applicable is not limited to the slot machine, and the main control board and the sub control board. The present invention is also applicable to gaming machines such as pachinko machines, ball slots, sparrow balls, and arrangement balls.

In the above-described embodiment, the configuration using the fuse as the change detection unit is described as the second embodiment and the third embodiment, and the configuration using the voltage detection circuit as the change detection unit is described as the fourth embodiment. These second to fourth embodiments can be arbitrarily combined.
For example, it can be set as the structure shown in FIG. 16 by combining 2nd embodiment and 4th embodiment. That is, the main control board on which the fuses (117a, 117b) are mounted as the change detection unit can be configured to include a stabilized power supply circuit and a voltage detection circuit.
Further, for example, by combining the third embodiment and the fourth embodiment, the configuration shown in FIG. 17 can be obtained. That is, the main control board on which the fuse (117c) is mounted as the change detection unit can be configured to include a stabilized power supply circuit and a voltage detection circuit.

Furthermore, in the above-described second embodiment, the main control board on which the fuses (117a, 117b) are mounted as the change detection unit is configured to supply the power supply voltage for the main CPU and the voltage for the inverter circuit from the power supply unit (114a). However, the present invention is not limited to this configuration. As shown in FIG. 18, in the main control board on which a fuse is mounted as a change detection unit, the power supply voltage for the main CPU is supplied from the power supply unit (114a), and the inverter circuit is connected. The voltage can be supplied from the stabilized power supply circuit (114b).
Similarly, in the above-described third embodiment, in the main control board on which the fuse (117c) is mounted as the change detection unit, the power supply voltage for the main CPU and the voltage for the inverter circuit are supplied from the power supply unit (114a). However, the present invention is not limited to this configuration. As shown in FIG. 19, in the main control board on which the fuse is mounted as the change detection unit, the power supply voltage for the main CPU is supplied from the power supply unit (114a) and the voltage for the inverter circuit is supplied. Can be supplied from the stabilized power supply circuit (114b).

  In the above-described embodiment, the inverter circuit that inverts and outputs the control command is used as the output circuit mounted on the main control board. However, the output circuit uses an inverter circuit that is a logic inverting circuit. For example, a circuit capable of transmitting the input control command to the sub CPU can be used.

  The present invention can be used for a gaming machine including a main control board that controls the progress of a game and a sub-control board that controls a predetermined effect.

1 slot machine (game machine)
11 Main control board 111 Main CPU
112 output circuit 114a power supply section (first power supply section)
114b Stabilized power supply circuit (second power supply unit)
116 Change Detection Unit 117 (117a to 117c) Fuse 118 (118a, 118b) Voltage Detection Circuit 21 Sub Control Board 30 Signal Cable t21 Input Terminal t22 Output Terminal

Claims (6)

A gaming machine comprising a main control board for controlling the progress of a game and a sub-control board for controlling a predetermined effect,
The main control board is
A main CPU that outputs a predetermined control command;
An output circuit for sending the control command to the sub-control board,
A signal cable for sending the control command output from the output circuit to the sub control board is connected between the main control board and the sub control board,
The output circuit includes an input terminal that inputs the control command output from the main CPU, and an output terminal that is connected to the signal cable and outputs the control command.
The output impedance on the output terminal side in the output circuit is:
The polarity of the voltage at the output terminal of the output circuit does not change when an unauthorized board is connected to the signal cable and a voltage is applied from the unauthorized board to the signal cable. A gaming machine. A change detecting unit for detecting that an electrical change has occurred in a circuit mounted on the main control board by executing a predetermined operation by an unauthorized board connected to the signal cable; The gaming machine according to claim 1, further comprising: As the change detection unit, a fuse is provided,
When the unauthorized substrate connected to the signal cable performs a predetermined operation, a current of a predetermined value or more flows through the output circuit mounted on the main control board, and the fuse is blown. The gaming machine according to claim 2, wherein the unauthorized board is detected. As the change detection unit, a voltage detection circuit is provided,
In this voltage detection circuit, the voltage on the wiring connected to the output circuit mounted on the main control board fluctuates due to execution of a predetermined operation by the unauthorized board connected to the signal cable. The gaming machine according to claim 2, wherein the illegal purpose substrate is detected by detecting the fact that the game has been performed. When detecting that the voltage on the wiring has fluctuated, the voltage detection circuit outputs a reset signal for resetting the main CPU,
The gaming machine according to claim 4, wherein the main CPU stops the game being executed when the reset signal is input. The main control board is
A first power supply for supplying a power supply voltage to the main CPU;
The gaming machine according to claim 1, further comprising: a second power supply unit that supplies a voltage to the output circuit.

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