| 摘要 |
<P>PROBLEM TO BE SOLVED: To securely detect fraudulence with radio waves in a pinball game machine. Ž<P>SOLUTION: As for block numbers 8004-8007 set as input block numbers, whether 8 bits are all at high level (input signals are on) or not is determined (S601). Though it may be possible that two or three bits out of these 8 bits are simultaneously at high level, it is not possible that all the bits are at high level at the same time. Accordingly, when all the 8 bits are at high level, it may be considered that some noise penetrates (fraudulence with radio waves is performed). In this way, when the result of determination in the step S601 is affirmative, a management computer is notified that an abnormality occurs (S604), and such an announcement process as blinking a top lamp 17 in a pattern set for announcing abnormalities is executed (S605). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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