说明：  GSerial是一个DOS下串口通信程序，程序结构较好，能编出用中断方式接收/发送的多串口通信程序（龚建伟曾用它编过7串口通信程序）。Turbo C++ 3.0 Dos或 Win3X/9X/ME/NT/2K的DOS环境下运行
(GSerial under DOS is a serial communication program, program structure better, the amounts can be interrupted with receiving/sending of multiple serial communication program (Dan has used its seven series serial communication procedures). Turbo C 3.0 Dos Win3X/9X/ME/NT/2K or the DOS operating environment)