【摘要】 本文介绍一种微机数据交换系统。该系统参考OSf基本模式设计,适合目前国内IBM—PC/XT微机通信状况。系统在假脱机方式下通信,软件设计上大量采用中断窃权的办法。文章还针对PC机执行双用户/双任务工作时,容易发生磁盘瓶颈效应的现象,介绍了解决磁盘I/O瓶颈效应的方法。 系统采用半双工制式异步串行通信,速率为50～9600bit/S任选。网络结构采用全通型〔无线、有线〕、总线型〔有线〕或辐射型〔报线〕。用户根据需要可进行选址和全址通信,以实现微机远程磁盘文件拷贝。更多还原

【Abstract】 An exchanging data system using microcomputer is introduced in this ?, report. Referring to OSI essential model, the system is designed to suit the present condition of the IBM-PC/XT personnal computer communication in our country. In the system, communication is carried out by spooling fashion, and interrupt right steal-using principle is used greatly in designning software. This report also states a technique with which we can solve the bottleneck effect.The system works on half-duplex and on asynchronous state. The transter rate ranging from 50 to 9600 bit/s can be freely selected by users. The network structure of the system is designed as all-pass, bus or radiant model. According to the requirements of user, the communication can be carried out in selected address or in all addresses pattern in order to copy the disk-files of the microcomputer distantly.更多还原