【摘要】 本文介绍了我们设计开发的ＤＯＳ／ＵＮＩＸ环境下带ＭＯＤＥＭ控制的串行口驱动程序、驱动程序之上的Ｘ．２８通信平台以及平台的应用。ＤＯＳ下的底层驱动程序用驻留中断实现，ＵＮＩＸ下的驱动程序用ＵＮＩＸ的流机制实现，数据接收均采用硬件中断，有效地防止了漏字符现象的发生。ＤＯＳ、ＵＮＩＸ下串行口驱动程序之上的Ｘ．２８通行平台提供了一致的可用于二次开发的编程原语。利用该平台可以实现ＤＯＳ／ＵＮＩＸ应用程序通过Ｘ．２５公共数据网或公共电话网的数据传输。本文还介绍了我们在平台上开发的Ｘ．２５ＰＤＮ上ＳｐｒｉｎｔＭａｉｌ用户端应用程序。更多还原

【Abstract】 This paper describes a lower-level serial port driver and upper-level communication platform as well as applications of this platform to Sprint Mail Client using X.28 link,which are designed and implemented by the authors under both DOS and UNIX enviroment.Under DOS,lower-level driver is implemented by residential interruptting program, while under UNIX, it is implemented by UNIX STREAMS.The data receiving in both drivers employs hardware interruption so as to prevent the leakage of characters effectively.The upper-lever communication platform on DOS is consistent to that on UNIX. Based on the implemented platform, data transfer can be processed through the X. 25 PUBLIC DATA NETWORK or PUBLIC SYSTEM OF TELECOMMUNICATION NETWORK with DOS/UNIXapplication program.更多还原