| 摘要 |
PROBLEM TO BE SOLVED: To enable the smooth exchange between a game board and a game controlling circuit by connecting a sales signal terminal with a CPU of a main body controlling circuit that controls a prize ball expelling device by expelling a rental ball by a ball rental signal, and outputting the ball rental into a managing computer. SOLUTION: An device 181 for answering the number of balls of a game controlling circuit 62 is with each input terminal of a CPU in a main body controlling circuit 63 through an interface. That is, a pulse signal drive 101 that shows the number of prize ball in a game controlling circuit 62 is connected with an S pulse input terminal of the CPU and a signal drive 102 that allows/ prohibits a prize ball is connected with a ready input terminal. Also, a signal drive 103 for asking the number of prize balls is connected with inq. output terminal. Furthermore, an input terminal for rental ball at the CPU is connected with a card reader controlling circuit. By this constitution, the main body controlling circuit and a card reader lighter controlling circuit can be exchanged one by one and the exchange can speedily be done.
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