| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the fraudulent attempt into the boards to cope with the recent skilful fraudulence in the structures of the communication circuits of the control boards placed on a pinball game machines. SOLUTION: In the pinball game machine, one of the sub control boards disposed in proximity to the game control board 30 is connected to the game control board 30 through a relay board 37 loaded with no CPU and a one-way communication which transmits no data to the game control board 30 from the relay board 37 is provided for the connection between the relate board 37 and the game control board 30 while one way communication circuit which transmits no data to the relay board 37 from the sub control board is provided for the connection between the sub control board connected to the relay board 37 and the relay board 37. The sub control boards other than that connected to the relay board 37 are not connected to the relay board 37 and the game control board 30. Instead, the sub control board connected to the relay board 37 stores the data transmitted from the game control board 30 while transmitting the data generated based on the data to other sub control boards. COPYRIGHT: (C)2006,JPO&NCIPI
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