一个ps2口驱动和编程方法。主要是键盘,当键盘产生中断时，蜂鸣器和运行灯都会有反映。可以敲入一些键值，同时观察主板反映。--PS2 port driver and programming method. When keyboard generates an interruption, alarm and light will have response. You could press some keys and observe the reaction of motherboard.