| 摘要 |
PROBLEM TO BE SOLVED: To allow inspection with high reliability on control by a CPU on the basis of a detection signal in a game machine constituted to perform control on a game by the CPU on the basis of the detection signal from a detecting means. SOLUTION: A buffer circuit 21 is provided at the subsequent stage of a filter circuit 4 for eliminating noise from a game ball detection signal outputted from a ball detecting switch 1. The output of the buffer circuit 21 is inputted to an input port circuit 5 so as to be used for control performed by the CPU 6A, and taken off as an inspection signal from a signal terminal fitting area 22. The buffer circuit 21 is formed of the same element as the input port circuit 5.
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