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本文概述了远程星形实时通信网中主机系统的构成及其功能。着重阐述了以PDP-11/73为主机系统的通信软件的设计特点。重点介绍了远程通信软件的开发环境、软件构成、各任务模块的划分及其相互之间的关系、优先级别的确定、及用多任务实现各模块功能的方法。最后,用层次概念概括地描述了该系统的通信协议。
This article outlines the composition and function of the host system in a remote star real-time communication network. Focus on the PDP-11/73 host system for communication software design features. The development environment, software composition, the division of each task module and the relationship among them, the determination of the priority level and the method of realizing the function of each module by multi-task are mainly introduced. Finally, the concept of hierarchy is used to describe the communication protocol of this system.