设计微处理器基本输入输出系统，通过拨码开关控制LED灯的亮灭（开关为高电平时灯亮,反之则灯灭），并从键盘输入的字符可以在超级终端回显-Design microprocessor basic input output system, is controlled by DIP switch LED turns on or off (switch is high, the lights, the lamp is off and vice versa), and characters can be entered from the keyboard echo in the HyperTerminal