JP2002018072A - Circuit board mounted with electronic device for game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an illegal action to a circuit board mounted with an electrically rewritable ROM(read only memory). SOLUTION: The flash ROM 201 is mounted on the circuit board 40 in a rewrite deactivated state, and the circuit board 40 is fixed and supported on a base section 10. Since a cover section 11 fastened to the base section 10 by bolts 30 is transparent, such a fraud as the rewriting of the flash ROM 201 is hardly conducted in a normal state, and the fraud, if any, can be easily grasped by a visual observation or the like of the external appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board on which an electronic device for controlling a game operation is mounted.

[0002]

2. Description of the Related Art In recent years, complicated electronic control of a game machine has been performed by various electronic devices, and these various electronic devices are mounted on a circuit board. Such an electronic device includes a CPU for controlling the entire game,
There are a ROM that records the operation procedure of the PU, a RAM that functions as a work area, and the like.

In recent years, in many cases, an electronic device called an electrically rewritable flash ROM is mounted as a kind of the ROM in many cases.
In the OM, the contents of the stored program can be electrically rewritten, so that it can be recycled, and can cope with a change in the program from the development stage to the commercial stage.

On the other hand, on the other hand, the possibility of improper rewriting cannot be denied since it is electrically rewritable. It has been desired to develop a technique that can prevent the data from being rewritten, and can recognize the rewriting when the data is rewritten.

[0004] The present invention has been made to solve such a conventional problem, and an electrically rewritable RO.
It is an object of the present invention to provide a circuit board that prevents unauthorized modification of a circuit board on which M is mounted, and that can keep track of the opening history even if an illegal act is performed.

In order to achieve the above object, the present invention provides a circuit board on which an electronic device for controlling a gaming machine is mounted, wherein a rewritable memory device is mounted, and Is characterized in that an electric signal for inactivating rewriting is supplied.

According to the present invention, since the electrical signal for inactivating rewriting is supplied to the electrically rewritable memory device mounted on the substrate, it is difficult for illegal operation such as rewriting of the memory device to be performed in a normal state. Become.

According to a second aspect of the present invention, in the memory device, a game machine control program for causing a series of game operations to be performed by execution of the main control means is stored, and is the same as the game program. And a logic gate cell in which the digital information of the content is formed by a group of gates, and a comparison for judging the coincidence of the data on the memory device and the data on the logic gate cell with the address output from the main control means. Means,
Is formed on the same PLD (programmable logic device) and is also mounted on a circuit board, so that a change in the game program can be easily detected. Moreover, since the logic gate cell is manufactured using the PLD, it is extremely difficult to work on the gate cell side.

The invention according to claim 3 is based on claim 1.
In the electronic device mounting circuit board for a game machine according to any one of the above 2 and 2, a case where the mounted electronic device is visible from the outside and the opening history can be understood is separated from the circuit board side. Since it is characterized in that it is fixed in a pile state, it is easy to visually determine whether or not fraud has been performed from the outside, and the history can be easily grasped even if it is opened.

Embodiments of the present invention will be described below. First, the circuit board 40 on which a gaming machine control electronic device is mounted will be described.

As shown in FIG. 3, a main control unit 200 for controlling the overall operation of the game machine,
A D (Programmable Logic Device) 500 and an electrically rewritable flash ROM 201 are mounted.

The flash ROM 201 is a device whose storage contents can be electrically rewritten, and has an address port 250 for inputting an address signal and a data port 251 for outputting data. FIG. 4 is an explanatory diagram showing an example of a storage state of the game program in the flash ROM 201. As an example, if an address can be defined by 8-bit digital data,
The contents “a” to “z” are stored for the respective addresses “00000000” to “11111111”.

[0010] A signal (ground potential in this example) for preventing the activation is applied to the rewrite activation terminal 46 of the flash ROM 201. That is, a low level signal is applied when the rewrite activation is active high, and a high level signal is applied when the rewrite activation is active low, so that rewriting of the flash ROM 201 is disabled.

As shown in FIG. 3, on the PLD 500,
The voltage level tolerant gate 510, the address decoder 520, the voltage level tolerant gate 530, the logic gate cell 540, the comparing unit 560, the non-coincidence processing unit 570, and the gate 580 are integrally formed by hardware such as a logic gate. Is formed. The comparing section 560 can supply a trigger signal from the outside, and the mismatching processing section 570 is connected to the LED 581.

The logic gate cell 540 includes digital information having the same content as that of the game program stored in the flash ROM 201 by a group of gates (not shown). FIG. 5 shows the address from the main control unit 200, the output data correspondingly output from the address decoder 520, and the contents (data) of the address in association with each other. When an address is applied from unit 200, an output value corresponding to the address is applied to logic gate cell 540. Then, the logic gate cell 540 outputs data corresponding to the address from the main control unit 200 to the comparison unit 560.

The voltage level tolerant gate 510
The voltage level tolerant gate 530 operates to stabilize the output voltage even when the input voltage fluctuates, and thus contributes to the stabilization of the operation.

(Operation Example 1) When the main controller 200 outputs an address, it outputs a voltage level tolerance gate 510.
To the address decoder 520 via
It is also provided to the address port 250 of the flash ROM 201. Then, the flash ROM 201 outputs the corresponding data to the data port 251, and this is output via the voltage level tolerance gate 530 to the comparator 56.
0 is given. On the other hand, the address decoder 520 having received the address provides the address decode output value to the logic gate cell 540.
40 gives the corresponding data to the comparison unit 560.

The comparing section 560 determines the coincidence of the two data, and if they match, gives the data of the main control section 200. On the other hand, if they do not match, this fact is notified to the non-matching processing unit 570. Then, the non-matching processing unit 570 turns on the LED 581 and sets the gate 5
80 is set to a high impedance state, and the bus to the main control unit 200 is set to a high impedance state.
Is disabled.

Therefore, the logic gate cell 5 composed of a group of gates receives digital information having the same contents as the game program.
40, and the comparison unit 560 is the main control unit 20
Flash ROM for address output from 0
201 and the logic gate cell 504
Since the consistency of the above data is determined, it is possible to easily detect that the game program has been changed. In addition,
If the comparing section 560 performs the determining operation by a predetermined trigger, the comparing section 560 can perform the comparing and determining operation only when the trigger is given. For example, a signal at power-on can be given as a trigger,
What is necessary is just to give a trigger when there is no access operation for a predetermined period, or to give a trigger every predetermined period.

In this embodiment, the electrically rewritable flash ROM 201 is used as the storage means for storing the game program. Can easily be detected. Furthermore, since the mismatched processing unit 570 notifies that the two data do not match by lighting the LED 581, the mismatch between the two data can be easily grasped. It should be noted that notification by audio information or the like other than light may be used.

Further, since the inconsistency processing unit 570 sets the bus for supplying data to the main control unit 200 to a high impedance state, the main control unit 200 can be disabled thereafter.

(Operation Example 2) In the operation example 1, the operation when one address is given to the main control unit 200 has been described. However, when all accessible addresses output from the main control unit 200 are given, The same operation can be performed.

That is, the comparing section 560 determines the coincidence of the data on the flash ROM 201 and the data on the logic gate cell 520 with respect to each of all accessible addresses output from the main control section 200. , The processing unit 570 at the time of non-coincidence other than the case of all coincidences
To that effect. The operation of the non-matching processing unit 570 is the same as that described above. Therefore, according to the operation example 2, it is possible to determine whether or not the change has been made in all the game programs.

(Operation Example 3) In this operation example, the main control unit 2
It is characterized in that the comparison operation is performed only when a specific address is given from 00. First, the main control unit 200
Gives a certain address. Then, the comparison unit 560 outputs data on the flash ROM 201 to a specific address output from the main control unit 200,
Also, the coincidence of the data on the logic gate cell 540 is determined, and if there is no coincidence, the non-coincidence processing unit 570 is performed.
To that effect. The operation of the non-matching processing unit 570 is the same as that described above. On the other hand, in this operation example, the comparison operation itself is not performed except when this specific address is output from main control unit 200.

Therefore, according to the third operation example, it is possible to determine whether or not a certain portion of the game program has been changed. For example, a change check of the game program can be performed only when a program of an important part such as a prize ball payout or a big hit determination is read.

In the above embodiment, the logic gate cell 540, the comparing means 560, and the inconsistent processing section 5
70, the address decoder 520, the gate 580, etc. are all realized by hardware and formed on a PLD (programmable logical device), so that the contents of the logic gate cells, the operation of the comparing means, and the inconsistency processing unit 57
Since it is difficult to analyze the operation of the address decoder 520b, the operation of the address decoder 520b, and the like, it is extremely difficult to perform the work for making the change of the game program undetectable.

In addition, a signal for preventing the activation is applied to the rewrite activation terminal 253 of the flash ROM 201, and the above-described operations are realized in a state where the illegal act is prevented.

Next, the casing and the like of the circuit board 40 will be described. A circuit board case 15 fixedly supported by a circuit board 17 is fixed to a central portion on the rear left side of the gaming machine 100 as shown in FIG. The gaming machine 100 may be a pachinko machine, a pachislot machine, or a game machine provided in a game center.

As shown in the external view of FIG. 2, the circuit board case 15 is a hard-to-deform case made of a transparent member such as a synthetic resin. And a cover section 11 for covering the circuit board 40 fixedly supported by the base section 10. In FIG. 2, an opening and the like for leading out the electric wiring to the outside are not shown.

One short side of the base portion 10 of the circuit board case 15 is opened in a rectangular shape.
A circuit board slide groove 12 for supporting the circuit board 40 and a cover slide groove 14 vertically higher than the slide groove 12 for supporting the circuit board 40 are formed on the inner peripheral wall of the zero. The circuit board 40 is slidably inserted into the housing along the circuit board slide groove 12 and fixedly supported. Further, the cover portion 11 is slid and inserted along the cover slide groove 14, the cover portion 11 is attached to the base portion 10, and the base portion 10 and the cover portion 11 are fastened with the bolts 30, so that the circuit board housing 15 is Is configured. Thus, the cover 11
Is a first member fixed to the base portion 10 and covering the circuit board 40.
And a second state in which the covering of the circuit board 40 is released.

Therefore, the electrically rewritable flash ROM 201 (memory device) is fixedly supported on the base portion 10 in a rewrite inactive state, and the cover portion 11 fastened to the base portion 10 by the bolt 30 is transparent. Therefore, in the normal state, the flash RO
Unauthorized operations such as rewriting of M201 are unlikely to be performed, and even if the unauthorized operation is performed, it can be easily grasped by visual inspection or the like.

As shown in FIG. 6, a bolt 30 for fastening the base portion 10 and the cover portion 11 is composed of a screw portion 30 and a head portion 34 formed integrally therewith. The joining portion 38 for joining the head and the head 34 has a small diameter. If a predetermined torsional force is applied through the head 34, the joining portion 38 is broken and the head 34 and the screw portion 32 are separated. It is supposed to be. Further, a pair of locking pieces 36 are formed on the head 34 so as to face each other and extend to the front end side of the head 34 with a part thereof cut away.
The diameter can be expanded and reduced in the radial direction.

On the other hand, a screw hole 26 is formed in the bottom wall of the base 11.
The bolt guide member 21 formed with four portions is fixed, and correspondingly, a screw hole 26 is formed in the lower surface side of the cover portion 11.
The bolt guide member 20 in which four screw holes 24 corresponding to are formed is fixed. The bolt guide member 20 has a locking portion (not shown) formed by enlarging a part of the screw hole 24. Further, the screw hole 24 of the bolt guide member 20 and the screw hole 26 of the bolt guide member are formed in the circuit board 40.
A fixing hole 49 through which the bolt 30 penetrates is formed. Therefore, with the fixing holes 49,
When the bolt 30 is screwed into the screw hole 24 and the screw hole 26, the circuit board 40 and the cover 11
Will be fixed.

In such a fixed state, the locking piece 36 of the bolt 30 is fixed to the locking portion 48 of the bolt guide member 20.
To prevent the head 34 from coming out, and if the joint 38 is damaged, the head 34 and the screw 32 are separated, and the screw 32 cannot be pulled out.

Accordingly, the locking piece 36 is enlarged in diameter and locked to a locking portion (not shown), and the base portion 10 and the cover portion 11 are fastened with the head portion 34 separated from the screw portion 32. Since this operation is performed, the base 10 and the cover 11 are difficult to separate from each other, and it is difficult to make unauthorized modifications to the flash ROM 201.

Further, a slit (not shown) is formed on the back side of the bolt guide member 21 fixed to the base portion 11 so as to correspond to the screw hole 26. By cutting off the slit when necessary, the bolt 30 screwed into the screw hole 26 can be operated from the back surface side of the base portion 10.

The places where the base 10 and the cover 11 are fastened and the places where the circuit board 40 is fixed by the bolts 30 configured as described above, that is, the screw holes 24 and 26 of the bolt guide member 20 and the bolt guide member 21, and The fixing holes 49 are provided at a plurality of positions (four positions in the present embodiment) according to a predetermined number of inspections. Therefore, the number of times the circuit board housing 15 has been opened, that is, the opening history can be recognized.

Therefore, since the bolt 30 has a plurality of fastening positions for bringing the base portion 10 and the cover portion 11 into a fastening state, the separation between the base portion 10 and the cover portion 11 is made more difficult, and the bolts 30 are temporarily provided. When the fastening work is performed while changing the fastening position, the work history can be easily grasped.

Although the embodiment of the present invention has been described above, it goes without saying that various modifications and changes may be made to the above embodiment without departing from the spirit of the present invention.

As described above, according to the present invention, in a normal state, it is difficult to perform illegal operations such as rewriting of a memory device, and even if an illegal operation has been performed, it can be easily grasped. can get.

[Brief description of the drawings]

FIG. 1 is an external view of a back side of a gaming machine 100. FIG.

FIG. 2 is an external view of a circuit board case 20.

FIG. 3 is a plan view of the circuit board 40.

FIG. 4 is an explanatory diagram of storage contents of a flash ROM 201;

FIG. 5 is an explanatory diagram illustrating an operation of an address decoder 520.

FIG. 6 is an explanatory view of a bolt 30.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base part 11 Cover part 15 Circuit board housing body 20 Bolt guide member 21 Bolt guide member 24 Screw hole 26 Screw hole 30 Bolt 32 Screw part 34 Head 36 Locking piece 38 Joining part 40 Circuit board 500 PLD (Programmable logical device) 510 Voltage level tolerant gate 520 Address decoder 530 Voltage level tolerant gate 540 Logic gate cell 560 Comparison unit 570 Mismatch processing unit 580 Gate 581 LED

Claims (3)

[Claims] 1. A circuit board on which an electronic device for controlling a gaming machine is mounted, wherein a rewritable memory device is mounted, and an electric signal for inactivating rewriting is supplied to the memory device. Electronic device mounted circuit boards for gaming machines. 2. The gaming machine electronic device mounted circuit board according to claim 1, wherein said memory device has a main control means executing a series of gaming operations to execute a series of gaming operations. A logic gate cell in which a program is stored, wherein digital information having the same content as that of the game program is constituted by a group of gates; and data on the memory device and an address corresponding to an address output from the main control means. A circuit board mounted with an electronic device for a game machine, wherein the comparing means for determining the coincidence of the above data is formed on the same PLD (programmable logic device) and is also mounted on the circuit board. 3. The electronic device mounted circuit board for a game machine according to claim 1, wherein the mounted electronic device is externally visible, and
A circuit board mounted with an electronic device for a gaming machine, wherein a case whose opening history is known is fixed in such a manner that it is difficult to separate from a circuit board side.