| 摘要 |
PROBLEM TO BE SOLVED: To provide a command communication device which takes measures to deal with noise according to the situation, precisely determining the noise situation without receiving a signal from a transmitted side, in a game machine in which a main board and a sub board are connected by a communication line. SOLUTION: In the game machine, which includes the main board 1 and the sub board 2 connected by the serial communication line 31, and in which communication signals are unidirectionally transmitted from the main board to the sub board to transmit commands, the main board 1 includes a noise detector 13 and a determination portion 14, a terminal on the side of the main board of the serial communication line 31 is connected to the noise detector to detect the noise state from electrical signal of the serial communication line 31 for determining the noise level based on the volume or frequency of the noise, communication speed or the number of repeating transmission is set depending on the determined noise level to transmit the command signals to the sub board 2, and noise level information is added to the command signals to inform the sub board 1 for corresponding appropriate processing. COPYRIGHT: (C)2003,JPO
|
