说明：  这是通讯接口实验《中断原理及8259A中断控制器实验》的原理程序，适合于那些上嵌入式系统、通信、计算机专业的人
(This is the communication interface experiment, "interrupted Principle and 8259A interrupt controller experiment," the principle procedures, suitable for those on embedded systems, communications, computer specialists in the)