JP5035446B2 - Bullet ball machine - Google Patents

Description

  The present invention relates to a ball game machine represented by a pachinko game machine and the like, and more particularly to a ball game machine capable of preventing an illegal act by a “hanging board” or the like.

  This type of pachinko gaming machine is equipped with a display device capable of variably displaying a plurality of types of symbols, and is configured to start variably displaying when a hit ball that has been driven into the game area passes through the symbol operating gate. . When this variable display stops in accordance with a predetermined combination of symbols, a big hit is made, a predetermined game value is given to the player, and a large amount of game balls can be paid out.

  Whether or not the jackpot is generated is determined at the timing when the hit ball passes the symbol operating gate. That is, a counter that is periodically updated in a certain range by one count (for example, by 1 count every 2 ms, in a range of 0 to 630) is provided when the hit ball passes the symbol operation gate. When the read counter value matches a predetermined value such as “7”, a jackpot is generated. When a jackpot occurs, a jackpot command is transmitted to the display board of the display device via a cable connected to the connector of the control board. In the display device, the variable display is controlled based on the received jackpot command, and a jackpot display that stops at a predetermined symbol combination is displayed.

  Recently, however, there have been reports of fraudulent acts using illegal boards called “hanging boards”. This fraudulent act is that an illegal substrate is hung between the control substrate and the display substrate of the display device (an illegal “hanging substrate” is attached) to unreasonably generate a big hit. Specifically, a counter (counter that is periodically updated within a certain range) in the “hanging board” is operated in the same manner as the counter for determining the jackpot provided in the pachinko gaming machine. The counter is reset (cleared to 0) when the pachinko gaming machine is turned on, and the occurrence timing of the jackpot in the “hanging board” is grasped. And, in accordance with the grasping timing of the jackpot, illegally generate the symbol operation gate passing signal of the hit ball in the “hanging board”, and output it to the control board of the pachinko machine to generate an unreasonable jackpot It is to let you. Amusement halls and the like have suffered a great deal of damage due to fraudulent acts using this “hanging board”.

  Therefore, the applicant of the present application changes the initial value of the update of the random number counter every time n (n is a natural number) of the random number counter that counts the random number value that determines the jackpot in Japanese Patent Application No. 10-177539. Invented a ball and ball game machine (unknown). According to the ball game machine of the present invention, the initial value of the random number counter update is not a fixed value, but is changed every n number of updates. It is not possible to match the value of the random number counter, and it is impossible to grasp the occurrence timing of the jackpot. Therefore, fraudulent acts caused by the “hanging board” can be prevented.

  However, although the value counted by the initial value counter is used as the initial value for updating the random number counter, the value of the initial value counter is repeatedly updated during the remaining time of the reset interrupt process. Therefore, when the initial value counter is composed of 2 bytes or more, the initial value counter value may be out of the range of the random number counter update depending on the next reset interrupt generation timing. was there.

  In other words, when the value of the initial value counter is updated in the addition direction, when the updated value is written to the initial value counter in the order of the upper byte and the lower byte, the timing of the next interrupt that occurs due to the absence of the remaining time for interrupt processing Depending on the case, the updated initial value counter value may be out of the range of the random number counter update. On the other hand, when the value of the initial value counter is updated in the subtraction direction, if the updated value is written to the initial value counter in the order of the lower byte and the upper byte, the updated initial value counter value is out of the update range of the random number counter. May be a value.

  The former will be described, for example, when the value of the random number counter is updated within the range of “0 to 276h” and the value of the initial value counter is “1FFh”. It is assumed that the value of the initial value counter of “1FFh” is read out, that is, for example, “+1” is updated in the addition direction, and the updated value becomes “200h”. When the updated value is written to the initial value counter in the order of the upper byte and the lower byte, the value of the initial value counter temporarily changes from “1FFh” to “2FFh” after writing to the upper byte. 200h ". Therefore, if a reset interrupt occurs at the timing after writing to the upper byte but before writing to the lower byte, the update of the initial value counter is completed without writing to the lower byte. The value of “2FFh” is a value outside the update range of the random number counter.

  If the value of the initial value counter is outside the range of updating the random number counter, and that value is written as the initial value of updating the random number counter, the value of the random number counter is outside the range that should be updated. There is a problem that the occurrence probability of the jackpot is different from the planned probability or the initial value of the update of the random number counter is not changed thereafter.

  The present invention has been made to solve the above-mentioned problems, and prevents an illegal act caused by a “hanging board” or the like by changing the initial value of the update of the random number counter to a value within the original update range. It aims to provide a ball game machine that can be used.

  In order to achieve this object, the ball game machine according to claim 1 includes an interrupt process that is periodically executed, a random number counter, and an updating unit that updates the value of the random number counter by the interrupt process, Reading means for reading the value of the random number counter at a predetermined opportunity, and when the value of the random number counter read by the reading means matches one of the predetermined values, An initial value memory for storing an initial value of the random number counter being updated, and a counter for counting an initial value of the next update of the random number counter, wherein the interrupt An initial value counter that is repeatedly updated during the remaining time until the next interrupt processing occurs by processing, and at least two buffers in which the values of the initial value counter are written, Storage means for storing the buffer in which the value of the initial value counter is normally written, and updating the random number counter by writing the buffer value stored by the storage means into the random number counter and the initial value memory. And changing means for changing the initial value.

  According to the bullet ball game machine of the first aspect, in the interrupt process periodically executed, the value of the random number counter is updated by the updating unit and is read by the reading unit at a predetermined trigger. When the read value of the random number counter matches one of the predetermined values, it becomes a big hit and a predetermined game value is given to the player under predetermined conditions.

The value of the initial value counter that counts the initial value of the next update of the random number counter is written to the random number counter and the initial value memory via the buffer, and the initial value of the update of the random number counter is changed. Thus, since the initial value of the random number counter update is not a fixed value but a value that is periodically changed, the “hanging board” or the like is illegal in the interior of the ball game machine when the power is turned on. Even if the counter is reset, the illegal counter value cannot match the random counter value. Therefore, it is possible to prevent the “hanging board” or the like from grasping the occurrence timing of the jackpot.
Moreover, the value of the initial value counter that counts the initial value of the update of the random number counter is repeatedly updated during the remaining time of the interrupt process that is periodically executed. Since the remaining time of the interruption process changes according to the state of the game, it cannot be grasped by the “hanging board” or the like. Therefore, the value of the initial value counter that is repeatedly updated during the remaining time is used as the initial value of the update of the random number counter. Also in this respect, it is possible to prevent the grasp of the value of the random number counter by the “hanging board” or the like. it can.
The value of the initial value counter is written to the random number counter and the initial value memory via the buffer. Since at least two buffers are provided, the initial value counter value is normally written to at least one of the buffers regardless of the timing at which the remaining interrupt processing time runs out and the next interrupt occurs. Yes. The buffer in which the value of the initial value counter is normally written is stored by the storage means. The value of the buffer is written to the random number counter and the initial value memory, and the initial value of the update of the random number counter is changed. Since the initial value of the random number counter update is changed based on the buffer value in which the initial value counter value is normally written in this way, the random number counter is The initial value of the update can be changed with a value within the range of the original update.

According to the ball game machine of the present invention, the initial value of the random number counter for determining the jackpot is not a fixed value but a value that is periodically changed. In addition, even if the “hanging board” or the like resets an illegal counter inside the counter, the value of the counter cannot be matched with the value of the random number counter. Therefore, there is an effect that it is impossible to grasp the timing of occurrence of the jackpot by the “hanging board” or the like and it is possible to prevent an illegal act by the “hanging board” or the like.
Moreover, the value of the initial value counter that counts the initial value of the update of the random number counter is repeatedly updated during the remaining time of the interrupt process that is periodically executed. Since the remaining time of the interruption process changes according to the state of the game, it cannot be grasped by the “hanging board” or the like. Therefore, since the value of the initial value counter is repeatedly updated during the remaining time, it is possible to prevent the grasp of the value of the random number counter by the “hanging board” or the like.
In addition, the value of the initial value counter is written to the random number counter and the initial value memory through the buffer. However, since at least two buffers are provided, the remaining time of the interrupt process is eliminated and the next interrupt is Even if it occurs at the timing, the value of the initial value counter is normally written in at least one of the buffers. Since the buffer in which the value of the initial value counter is normally written is stored by the storage means, the value of the buffer is written to the random number counter and the initial value memory, and the initial value of the update of the random number counter is changed. Even if the next interrupt occurs at any timing, the initial value for updating the random number counter can be changed to a value within the original update range. Therefore, there is an effect that it is possible to avoid the problem that the occurrence probability of the jackpot is changed to a probability outside the setting or the initial value of the update of the random number counter is not changed.

It is a front view of the game board of the pachinko game machine which is one Example of this invention. It is the block diagram which showed the electrical structure of the pachinko gaming machine. It is the flowchart which showed the reset interruption process. It is the flowchart which showed the initial value counter update process. It is the flowchart which showed the random number update process.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the present embodiment, description will be made using a pachinko gaming machine as an example of a ball game machine, in particular, a first type pachinko gaming machine. Of course, it is possible to use the present invention for the third type pachinko gaming machine and other ball game machines.

  FIG. 1 is a front view of a game board of a pachinko gaming machine P in the first embodiment. Around the game board 1, there are provided a plurality of winning holes 2 through which 5 to 15 game balls are paid out by winning a hit ball. In the center of the game board 1, a liquid crystal (LCD) display 3 for displaying symbols as a plurality of types of identification information is provided. The display screen of the LCD display 3 is divided into three in the horizontal direction, and in each of the three divided display areas, symbols are displayed in a variable manner.

  Below the LCD display 3 is provided a symbol operating gate (first type starting port) 4, and when the hit ball passes through the symbol operating gate 4, the above-described variation display of the LCD display 3 is started. Below the symbol operation gate 4, a specific winning opening (large winning opening) 5 is provided. The specific winning opening 5 is a big hit when the display result after the fluctuation of the LCD display 3 coincides with one of the predetermined symbol combinations, so that the hitting ball is easy to win for a predetermined time (for example, 30 It is a winning opening that is opened (until the second elapses or 10 hitting balls are won). A V zone 5a is provided in the specific winning opening 5, and when the hit ball passes through the V zone 5a while the specific winning opening 5 is opened, a continuation right is established and the specific winning opening 5 is closed. Thereafter, the specific winning opening 5 is opened again for a predetermined time (or until a predetermined number of hit balls win the specific winning opening 5). The opening / closing operation of the specific winning opening 5 can be repeated up to 16 times (16 rounds), and the state in which the opening / closing operation can be performed is a state in which a predetermined game value is given (special game state). is there.

  FIG. 2 is a block diagram showing an electrical configuration of the pachinko gaming machine P. As shown in FIG. The control unit C of the pachinko gaming machine P includes a CPU 11 that is an arithmetic device, a ROM 12 that stores various control programs executed by the CPU 11 and fixed value data, and a memory that temporarily stores various data and the like. The RAM 13 is provided. The programs of the flowcharts shown in FIGS. 3 to 5 are stored in the ROM 12 as a part of the control program.

  The CPU 11 includes an ALU that performs arithmetic operations, an accumulator (hereinafter referred to as “Acc”) 11a, a plurality of internal registers 11b, and a flag register 11c. The values of the counter and the like provided in the RAM 13 are once loaded (written) into the internal register 11b of the CPU 11, updated in the internal register 11b, and then saved (written) into the original counter of the RAM 13. Updated).

  The 68-system 8-bit CPU 11 saves (writes) the value of the paired 2-byte (16-bit) internal register 11b to the 2-byte memory (in the RAM 13) of consecutive addresses with one instruction. In this case, however, writing is performed in the order of the upper byte and the lower byte because the data bus of the bus line 14 is composed of 8 bits. On the other hand, in the 80 system 8-bit CPU, in contrast to the 68 system CPU 11, the paired 2-byte (16-bit) internal register value is transferred to the 2-byte memory at the continuous address. It can be saved with one instruction in the order of bytes.

  The RAM 13 includes a random number counter 13a, an initial value memory 13b, an initial value counter 13c, a first buffer 13d, a second buffer 13e, and a buffer flag 13f. The random number counter 13a is a counter for determining the occurrence of a jackpot, and is updated by 1 count every 2 ms in the range of “0 to 630 (0 to 276h)” by the random number update process (S6) of FIG. The Therefore, the random number counter 13a is composed of 2 bytes. If the value of the random number counter 13a acquired when the hit ball passes the symbol operating gate 4 is, for example, “7”, a big hit occurs. When the jackpot occurs, a jackpot command is sent from the control unit C to the display device D described later. The display device D controls the variable display on the LCD display 3 to the jackpot state based on the jackpot command.

  The initial value memory 13b is a memory for storing an initial value of update of the random number counter 13a, and is composed of 2 bytes like the random number counter 13a. In this embodiment, the initial value of the update of the random number counter 13a is changed every time the random number counter is updated once. Therefore, when the updated value of the random number counter 13a matches the value of the initial value memory 13b, one round of updating of the random number counter 13a is completed, so that when the two values 13a and 13b match, The value of the first or second buffer 13d, 13e is written into the random number counter 13a and the initial value memory 13b, and the initial value of the update of the random number counter 13a is changed. Therefore, even if the initial value of the update of the random number counter 13a is changed, the randomness is uniform (the same value is not obtained when continuously acquired, and all values can be extracted with the same probability). A random value can be obtained.

  The initial value counter 13c is a counter for counting the initial value of the update of the random number counter 13a, and is composed of 2 bytes like the random number counter 13a. The value of the initial value counter 13c is updated one count at a time in the range of “0 to 630 (276h)” that is the same as the update range of the random number counter 13a by the initial value counter update process (S21) of FIG.

  The initial value counter update process of FIG. 4 is repeated during the remaining time in the reset interrupt process of FIG. 3, that is, after the end of the sound effect process (S19) until the next reset interrupt process occurs. It is executed (S21). The reset interrupt process is executed every 2 ms, but the processing time of each process from S1 to S19 executed in one reset interrupt process changes depending on the game situation, so the rest of the reset interrupt process The time is not a fixed time but an indefinite time that changes according to the game situation. Since the “hanging board” cannot grasp this indefinite time, the value of the initial value counter 13 c that is repeatedly updated within the indefinite time is used as the initial value for updating the random number counter 13 a, and the “hanging board” ”Makes it impossible to grasp the timing of jackpot occurrence.

  The first buffer 13d and the second buffer 13e are updated by the initial value counter updating process of FIG. 4 in order to write the value of the initial value counter 13c to the random number counter 13a and the initial value memory 13b at the end of one round of updating of the random number counter 13a. This is a buffer for storing the value of the initial value counter 13c. The first and second buffers 13d and 13e are composed of 2 bytes, like the initial value counter 13c and the random number counter 13a. When one round of updating of the random number counter 13a is completed, the value of either the first or second buffer 13d, 13e is written to the random number counter 13a and the initial value memory 13b, and the initial value of updating of the random number counter 13a is changed. Is done.

  The buffer flag 13f is a flag indicating a buffer in which the value of the initial value counter 13c is normally written out of the first or second buffers 13d and 13e. At the end of one round of update of the random number counter 13a, the values of the buffers 13d and 13e indicated by the buffer flag 13f are written into the random number counter 13a and the initial value memory 13b. The buffer flag 13f is turned on when the value of the initial value counter 13c is normally written to the first buffer 13d in the initial value counter update processing of FIG. 4, and is turned off when the value is normally written to the second buffer 13e. Therefore, at the end of one round of update of the random number counter 13a, if the buffer flag 13f is turned on, the value of the first buffer 13d is changed, and if the buffer flag 13f is turned off, the value of the second buffer 13e is changed to the random number counter 13a and the initial value memory. 13b.

  The CPU 11, ROM 12, and RAM 13 are connected to each other via a bus line 14, and the bus line 14 is also connected to an input / output port 15. The input / output port 15 is connected to the display device D and other input / output devices 16. The control unit C sends operation commands to the display device D and other input / output devices 16 via the input / output port 15 and controls these devices. The fluctuation display on the LCD display 3 and the opening / closing operation of the specific winning opening 5 are also controlled based on this operation command.

  The display device D includes a CPU 21, a program ROM 22, a work RAM 23, a video RAM 24, a character ROM 25, an image controller 26, an input / output port 27, and the LCD display 3. The CPU 21 of the display device D performs display control (variable display) of the LCD display 3 in accordance with an operation command output from the control unit C. The program executed by the CPU 21 is stored in the program ROM 22. Has been. The work RAM 23 is a memory that stores work data used when the CPU 21 executes a program.

  The video RAM 24 is a memory for storing data to be displayed on the LCD display 3, and the display content of the LCD display 3 is changed by rewriting the content of the video RAM 24. That is, the variable display of the symbols in each display area is performed by rewriting the contents of the video RAM 24. The character ROM 25 is a memory for storing character data such as symbols displayed on the LCD display 3. The image controller 26 adjusts the timings of the CPU 21, the video RAM 24, and the input / output port 27, intervenes in reading and writing data, and displays display data stored in the video RAM 24 at a predetermined timing with reference to the character ROM 25. It is displayed on the LCD display 3.

  Next, each process executed by the pachinko gaming machine P configured as described above will be described with reference to the flowcharts of FIGS. FIG. 3 is a flowchart of reset interrupt processing executed every 2 ms in the control unit C of the pachinko gaming machine P. The main control of the pachinko gaming machine P is executed by this reset interrupt process.

  In the reset interrupt process, first, a stack pointer is set (S1), and a pattern written in a predetermined area of the RAM 13 is checked (S2). If the predetermined pattern is written in the predetermined area as a result of the check, the RAM 13 is normal and normal (S2: normal), and the process proceeds to S3. On the other hand, if the predetermined pattern is not written in the predetermined area as a result of the check in S2, it is the reset interrupt process executed first after the power is turned on, or there is an abnormality in the RAM 13 (S2: abnormal) In this case, the process proceeds to S22, the contents of the RAM 13 are once cleared, the initial value is written into the RAM 13 (S22), and the next reset interrupt process is awaited.

  In the process of S3, a timer interrupt is set (S3). The timer interrupt set here includes a timer interrupt that generates a strobe signal for transmitting a command for controlling the display of the LCD display 3 to the display device D. After setting the timer interrupt, each interrupt is permitted (S4). After the permission of the interrupt, the output data updated in the previous reset interrupt process by the special symbol variation process (S15), the display data creation process (S17), the ramp / information processing (S18), etc. A port output process for outputting to the port is executed (S5). After the port output process is executed, a random number update process (S6) described later is executed to update the value of the random number counter 13a by "+1", and a storage timer subtraction process is executed (S7). The storage timer subtraction process shortens the symbol variation display time when there is a predetermined number or more of reserved balls for jackpot determination and when the symbol display is being displayed on the LCD display 3.

  In the switch reading process (S8), the value of each switch is read, and the ball that has been driven into the game area 1 enters the winning port 2 and the big winning port 5 (including the V zone 5a), and passes through the symbol operating gate 4. Further, it is a process for detecting a winning ball or a rental ball. The count abnormality monitoring process (S9) is a process for monitoring whether there is an abnormality in the switch data read by the switch reading process of S8. For example, even though the big winning opening 5 is opened and a hit ball is detected by the V count switch that detects the passing of the hit ball through the V zone 5a, the winning in the big winning openings 5 other than the V zone 5a is detected 10 When a single shot cannot be detected by the count switch, some abnormality has occurred in the 10 count switch, such as the 10 count switch being pulled out or broken. In addition, when a single prize ball is not paid out even though the payout motor for paying out a prize ball is driven, some abnormality has occurred in the prize ball payout device. As described above, in the count abnormality monitoring process (S9), the presence / absence of the abnormality as described above is monitored based on the switch data read by the switch reading process (S8).

  In the symbol counter update process (S10), a counter update process for determining a symbol to be stopped and displayed as a result of the variable display performed on the LCD display 3 is performed. In the symbol check process (S11), based on the counter value updated in the symbol counter update process (S10), the jackpot symbol, the off symbol, and the reach symbol used in the special symbol variation process (S15). Etc. are determined.

  If no error has occurred in the processing from S3 to S11 (S12: normal), the normal symbol variation processing (S13) displays the variation of the 7-segment LED, and the variation display results in a win. In this case, a hit process for releasing a normal electric accessory (not shown) for a predetermined time is executed. Thereafter, the state flag is checked (S14), and if the change of the symbol on the LCD display 3 is being displayed (S14: changing the symbol), the timing at which the hit ball passes the symbol operation gate 4 by the special symbol change process (S15). On the basis of the value of the random number counter 13a read in step (b), it is determined whether or not a big hit is made, and a display symbol variation process on the LCD display 3 is executed. On the other hand, if the result of checking the status flag is a big hit (S14: big hit), a big hit process (S16) such as opening the big prize opening 5 is executed. Further, as a result of checking the status flag, if the symbol is not changing or big hit (S14: Other), the processing of S15 and S16 is skipped and the process proceeds to the display data creation processing of S17. If an error is confirmed in the process of S12 (S12: error), each process of S13 to S16 is skipped and the process proceeds to a display data creation process of S17.

  In the display data creation process (S17), demo data displayed on the LCD display 3, display data of the 7 segment LED, and the like are created in addition to the symbol variation display. In the lamp / information processing (S18), the lamp of the holding ball is displayed. Various lamp data including data are created. In the sound effect process (S19), sound effect data corresponding to the game situation is created. These display data and sound effect data are output to each device by the port output process (S5) and the timer interrupt process described above.

  After the sound effect process (S19) ends, during the remaining time until the next reset interrupt process occurs, the symbol counter update process (S20), which is the same process as S10, and the initial value counter update process (S21) ) And repeatedly. Since the execution time of each process of S1-S19 changes according to the state of the game, the remaining time until the next reset interrupt process occurs is not a fixed time but changes according to the state of the game. Therefore, by repeatedly executing the symbol counter update process (S20) using the remaining time, the stop symbol can be changed at random. Further, by repeatedly executing the initial value counter updating process (S21) using the remaining time, the value of the initial value counter 13c serving as the initial value of the update of the random number counter 13a cannot be grasped by the “hanging board”. can do.

  FIG. 4 is a flowchart of the initial value counter update process. In the initial value counter update process (S21), the value of the initial value counter 13c that counts the initial value of the update of the random number counter 13a is set via the internal register 11b of the CPU 11 to the update range “0 to 630 ( 0 + 1 ”within the range of“ 0 to 276h) ”. The updated value of the initial value counter 13c is written to the first buffer 13d if the buffer flag 13f is off, and written to the second buffer 13e if it is on.

  First, the value of the initial value counter 13c composed of 2 bytes is written to the 2-byte internal register 11b (S41). The value of the internal register 11b is incremented by 1 (S42), and it is checked whether or not the value of the internal register 11b after the addition is “631” or more, that is, whether or not the update range of the random number counter 13a is exceeded. (S43). If the value of the internal register 11b after the addition is “631” or more (S43: Yes), it exceeds the update range value of the random number counter 13a, so the value of the internal register 11b is cleared to “0” (S44). . On the other hand, if the value of the internal register 11b after addition is “630” or less (S43: No), the value is within the update range of the random number counter 13a, so the process of S44 is skipped and the process proceeds to S45. To do. In the process of S45, the updated value of the internal register 11b is written into the initial value counter 13c and updated.

  After updating the initial value counter 13c, it is checked whether or not the buffer flag 13f is turned on (S46). If the buffer flag 13f is off (S46: off), the updated initial value counter 13c is written to the second buffer 13e in the previous initial value counter updating process, so the updated initial value counter is updated. The value of the internal register 11b equal to the value of 13c is written to the first buffer 13d (S47). On the other hand, if the buffer flag 13f is on (S46: on), the updated initial value counter 13c is written to the first buffer 13d in the previous initial value counter update process, so this time the internal register The value of 11b is written to the second buffer 13e (S48).

  After the updated initial value counter 13c is written to the first or second buffer 13d, 13e, the buffer flag 13f is inverted to indicate the buffer 13d, 13e in which the value has been normally written (S49). ), The initial value counter update process is terminated. That is, when the updated value of the initial value counter 13c is written to the first buffer 13d by the processing of S49, the buffer flag 13f is turned on, and when it is written to the second buffer 13e, the buffer flag 13f is turned off.

  As described above, this initial value counter update process is repeatedly executed during the remaining time until the next reset interrupt occurs in the reset interrupt process (S21). For this reason, in each process of S45, S47, and S48 in which 2 bytes are written from the internal register 11b of the CPU 11 to the work of the RAM 13, the next reset allocation is performed after the writing of 1 byte and before the completion of the writing of 2 bytes. May occur. A reset interrupt is a non-maskable interrupt that has the highest interrupt priority and cannot prohibit the start of interrupt processing. In such a case, the writing of 2 bytes is not completed, that is, out of 2 bytes. The initial value counter update process is forcibly terminated during the process (S45, S47, S48) while only 1 byte is written, and the process of S1 in FIG. 3 is executed. Therefore, in such a case, any value of the initial value counter 13c (S45), the first buffer 13d (S47), or the second buffer 13e (S48) is in the middle of writing in which only 1 byte is written out of 2 bytes. May be out of the range of updating the random number counter 13a.

  However, even if the value of the initial value counter 13c becomes a value outside the update range of the random number counter 13a, the value of the initial value counter 13c is not used as it is as the initial value of the update of the random number counter 13a. If the value of the initial value counter 13c is out of the update range of the random number counter 13a, the value is “631 (277h)” or more, and therefore “0” is cleared in the next initial value counter update process. (S43: Yes, S44), the value is returned to a value within the update range of the random number counter 13a. Therefore, even if the value of the initial value counter 13c becomes a value outside the update range of the random number counter 13a, the initial value of the update of the random number counter 13a does not become a value outside the original update range.

  Further, the 2-byte value of the internal register 11b is not normally written to the first or second buffer 13d, 13e, that is, only 1 byte of the 2 bytes is written, and the first or second buffer 13d, 13e is written. Even if any of these values is outside the update range of the random number counter 13a, that value is not used as the initial value for updating the random number counter 13a in the random number update process (S6) of FIG. Therefore, the initial update value of the random number counter 13a is not set to a value outside the original update range. This point will be described with reference to FIG.

  FIG. 5 is a flowchart of random number update processing. In the random number updating process (S6), the value of the random number counter 13a is updated by “+1” within the range of “0 to 630 (0 to 276h)” via the internal register 11b of the CPU 11 and used by the control unit C. There are other random number updates.

  First, the value of the random number counter 13a is written into the internal register 11b (S51). The value of the internal register 11b is incremented by 1 (S52), and it is checked whether or not the value of the internal register 11b after the addition is “631” or more, that is, whether or not the update range of the random number counter 13a is exceeded. (S53). If the value of the internal register 11b after the addition is “631” or more (S53: Yes), the value of the internal register 11b is cleared to “0” because it exceeds the update range value (S54). On the other hand, if the value of the internal register 11b after the addition is “630” or less (S53: No), the value is within the update range, so the process of S54 is skipped and the process proceeds to S55.

  In the process of S55, the updated value of the internal register 11b is compared with the value of the initial value memory 13b. Since the initial value of the update of the random number counter 13a is stored in the initial value memory 13b, if both values are equal (S55: Yes), the update of the random number counter 13a is completed once. Therefore, in such a case, it is checked whether or not the buffer flag 13f is turned on (S56). If it is turned on (S56: on), the normal value of the initial value counter 13c is stored in the first buffer 13d. In this case, the value of the first buffer 13d is written to the internal register 11b (S57). On the other hand, if the buffer flag 13f is off (S56: off), the normal value of the initial value counter 13c is stored in the second buffer 13e. In this case, the value of the second buffer 13e is set to the internal register. 11b is written (S58). After writing the value of the first or second buffer 13d, 13e to the internal register 11b, the value of the internal register 11b is written to the initial value memory 13b and the random number counter 13a (S59, S60), and the random number counter 13a is updated. Change the initial value of.

  On the other hand, when the updated value of the internal register 11b is not equal to the value of the initial value memory 13b (S55: No), the update of the random number counter 13a has not been completed yet, so the processing from S56 to S59 is performed. Is skipped, the value of the internal register 11b updated in the processing of S52 to S54 is written to the random number counter 13a (S60), and the random number counter 13a is updated. Thereafter, another random number update process used by the control unit C is performed (S61), and the random number update process is terminated.

  As described above, the values of the buffers 13d and 13e indicated by the buffer flag 13f are used as the initial value for updating the random number counter 13a. As described with reference to FIG. 4, the buffer flag 13f is turned on after the updated initial value counter 13c is normally written to the first buffer 13d, that is, after both two bytes are written. 2 is turned off after normal writing to the buffer 13e (S49). Since the value of the initial value counter 13c is written to the first and second buffers 13d and 13e alternately, the normal value of the initial value counter 13c is stored in the buffers 13d and 13e indicated by the buffer flag 13f. ing. Therefore, since the values of the buffers 13d and 13e indicated by the buffer flag 13f are maintained within the update range of the random number counter 13a, by using such values as initial values for updating the random number counter 13a, The initial update value of the counter 13a can be changed with a value within the original update range.

  In the above embodiment, the non-maskable reset interrupt process corresponds to the interrupt process described in claim 1. Further, the update means corresponds to the processes from S51 to S54 and S60 of the random number update process (S6) in FIG. 5, and the change means corresponds to the processes from S56 to S60.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in this embodiment, the value of the updated initial value counter 13c is written to the first and second buffers 13d and 13e every time the initial value counter updating process is performed, one of the buffers 13d and 13e. It was done alternately. However, instead of this, the updated value of the initial value counter 13c may be written to both buffers 13d and 13e every time the initial value counter is updated. When writing the updated value of the initial value counter 13c to only one of the buffers 13d and 13e every time the initial value counter is updated as in this embodiment, writing to both the buffers 13d and 13e each time The processing time can be shortened as compared with FIG. Therefore, the number of executions of the initial value counter update process that is repeated during the remaining time of the reset interrupt process can be increased accordingly.

  The modification of this invention is shown below. 2. The ball game machine according to claim 1, wherein the changing means is executed when a value of the random number counter matches a value of the initial value memory.

13 RAM of control unit
13a Random number counter 13b Initial value memory 13c Initial value counter 13d First buffer (buffer)
13e Second buffer (buffer)
13f Buffer flag (storage means)
C Control part P Pachinko machine (ball game machine)

Claims (1)

An interrupt process periodically executed; a random number counter; an updating unit that updates the value of the random number counter by the interrupt process; and a reading unit that reads the value of the random number counter at a predetermined trigger. In a ball game machine that gives a player a predetermined game value under a predetermined condition when the value of the random number counter read by the reading means coincides with one of predetermined values,
An initial value memory for storing an initial value of the random number counter being updated;
An initial value counter that counts the initial value of the next update of the random number counter, and is repeatedly updated during the remaining time until the next interrupt process is generated by the interrupt process;
At least two buffers into which the value of the initial value counter is written;
Storage means for storing a buffer in which the value of the initial value counter is normally written among the buffers;
A bullet ball game machine comprising: changing means for writing the value of the buffer stored by the storage means into the random number counter and the initial value memory and changing the initial value of the update of the random number counter.

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