本文介绍了PC总线到S-100总线转换器的工作原理和电路设计.在叙述PC总线和S-100总线功能的基础上,分析两种总线的异同,提出扩充板和接收板的设计思想和具体方案,并对扩充板上系统总线锁存、数据总线控制、存贮器地址设置和等待状态发生、MEMW及IOR控制和延时等主要电路进行了讨论,对接收板的数据总线开、断和流向控制作了具体说明. This paper introduces the working principle and circuit design of PC bus to S-100 bus converter.Based on the description of the functions of PC bus and S-100 bus, this paper analyzes the similarities and differences between the two buses, and proposes the design idea of ​​the expansion board and the receiving board Specific programs, and the expansion of the system bus latch, data bus control, memory address settings and wait states occur, MEMW and IOR control and delay and other major circuits were discussed, the receiving board of the data bus on and off And flow control were specified.