小范围内双机传输，用机内的8250，采用一发送一机接收方式
Within a small range of two-plane transmission, with the machine in 8250, using a machine to send a receive mode (2010-01-09, DOS, 1KB, 下载2次)
用C语言写的双机通信代码，能正常运行，安装串口调试助手后可以正常接发收。
Using C language to write the two-machine communications code, can be normal operation, installation serial debugging aides can be sending and receiving the normal admission. (2008-06-30, DOS, 27KB, 下载27次)