学习微型计算机原理及应用课程、微机接口技术等课程时，通过对计算机串口编程实验，验证串口通信程序设计的基本方法

微机原理各类实验汇编程序，包括简单I/O口扩展、8255A 可编程并行口实验、步进电机、小直流电机等(Microprocessor-based assembly program of various kinds of experiment, including simple I/O port expansion, 8255A programmable parallel port experiment, stepper motor, small DC motor and so on)