The contradiction between parity bit and address/ data bit is solved as the interruption and character mode are used in the system. The reliability and the realizability of the multimachine system are both improved. 由于采用了中断方式和字符格式进行多机通信,解决了奇偶校验位与地址/数据位(TBS)间的矛盾、提高了系统的可靠性和实时性。