微机系统硬件的在线测试问题,在一个高度自动化的系统中是举足轻重的。本文以英特尔公司8086系列的硬件为例,说明了系统所属的数字处理器,RAM、ROM、中断控制器、间隔定时器、并行外围接口及串行通信接口等大规模集成电路的在线测试原理及方法。同时还讨论了如何进行功能单板的诊断测试及系统的置信度测试等问题。 Online testing of computer system hardware is of paramount importance in a highly automated system. This paper takes the 8086 series hardware of Intel Corporation as an example to illustrate the on-line testing principle of large-scale integrated circuits such as digital processor, RAM, ROM, interrupt controller, interval timer, parallel peripheral interface and serial communication interface. method. At the same time also discussed how to carry out the diagnosis of functional veneer testing and system reliability testing and other issues.