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本文介绍车载式汉字信息处理联机网络系统所用的通信控制器。它利用价格低廉、功能较强的TP-801单板机,经硬件、软件扩充而成;可实现BSC规程的子集,从物理、链路两层上支持终端计算机完成通信任务,并具有前向纠错和有、无线信道自动切换等功能,故不受车载系统的局限,可广泛应用于各种计算机远程联机网络系统中,具有功能强、造价低、通用性好等特点。为降低成本,该通信控制器设计成两种模式,以分别适应主控台和属台的要求。本文阐明其设计思想、硬件和软件结构。
This article introduces the communication controller used in on-board Chinese character information processing online network system. It uses low-cost, more powerful TP-801 single-board computer, the hardware and software expansion made; can achieve a subset of BSC procedures, from the physical, link two levels to support the terminal computer to complete the communication tasks, and with the former It has the features of strong function, low cost, good universality and so on. It can be widely used in various computer remote online network systems because it has the functions of automatic error correction and automatic switching of wireless channels. In order to reduce the cost, the communication controller is designed into two modes to adapt to the requirements of the master console and the slave platform respectively. This article illustrates its design philosophy, hardware and software architecture.