这是接口实验,其中的内容为:实验二可编程定时器计数器8253 实验三 Windows中断 实验四 8255实验 实验五七段数码管实验 实验六竞赛抢答器 实验七交通灯控制实验 -This is the interface experiment, the contents of which are: experimental two programmable timer counter 8253 experiment three Windows interruption Experiment