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在计算机组成的分布式网络中有时不需要两台计算机之间进行相互信息交换,而是由一台计算机做为数据采集方式工作,它只要把采集到的信息发送给另一台计算机去处理,或者是由主计算机把信息(命令或数据)发送给辅助计算机,使辅助计算机定时地按主机的意图去完成适当的工作。针对这种情况,笔者结合某项工程的需要,用两台Z80单板计算机的串行输入输出接口芯片SIO完成了主从被动式异步信息通信。现将具体线路接法和程序过程介绍如下,供有关同志参考。
In a distributed network composed of computers, sometimes it is not necessary for two computers to exchange information with each other. Instead, a computer is used as a data collection method to send the collected information to another computer for processing. Or the host computer sends the information (command or data) to the secondary computer, so that the secondary computer regularly performs the work according to the host’s intention. In response to this situation, the author combined with the needs of a project, with two Z80 single board computer serial input and output interface chip SIO completed master-slave passive asynchronous communication. Now the specific line connection and procedure described below, for the comrades reference.