摘要： MDS系统是我们研制的一个多微机分布式计算机系统。MDS/DOS是为其配置的一个分布式操作系统,它是在MS DOS的基础上,通过增加分布式通信与资源管理模块(DCRM),分布式命令解释器(DCI),以及建立相应的通信机制后修改,扩充而成。本文主要讨论在设计和实现MDS系统中的通信机制和资源管理模块时的有关问题,内容包括:MDS系统中的通信子系统、通信方式、通信协议、报文的发送与接收以及MDS/DOS中的分布式通信和资源管理模块DCRM等。

关键词: 通信机制, 通信协议, 报文交换, 资源管理, 分布式操作系统

Abstract: Distributed communication and resource management module (DCRM) is a low level software in the MDS system. According to the hierachic view of operating systems, it ought to supply servers for distributed command interpreter (DCI) and user programs on higher levels, these servers include message exchange, referencing and updating system variables, requesting and releasing system resources, operating and executing remote files et al. To invoke these servers higher level softwares in the MDS system have two ways, that should use the INT OCOH function call instructions, or commit to the "background" command processor processing.