dos下操作pc104串口，进行rs232、rs422rs485通信，查询方式接收。头文件在tc中都有.-operate pc104 serial dos conduct rs232, rs422rs485 communications, queries for receiving. Tc in the header file in both.

DOS系统下，PC104工控板下RS422通信调试- The communication debugging under the PC104

dos系统下，基于PC104工控板的rs485通信调试-Rs485 communication debugging based the PC104 industrial control board