| 摘要 |
PROBLEM TO BE SOLVED: To enable a control command to be more securely transmitted from a main board to another board mounted with a control means to enable a fair game to be played by constituting the Pachinko machine to be equipped with a noise filter circuit on a control command receiving part and a circuit element with hysteresis properties on the output side of the noise filter circuit. SOLUTION: A noise filter circuit 106 by EMI filter is equipped on a display control command inputting part in a display control board 80. A circuit with hysteresis in input threshold voltage, for instance, an input buffer circuit 108 by 74HC14 is equipped on the output side of the noise filter circuit 106. Accordingly noise between boards is effectively eliminated by the noise filter circuit 106 and wave rounding by the filter is formed by an input buffer circuit 105. Consequently display control command data with a fine waveform without noise and INT signals are inputted into the display control CPU 101.
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