微机原理与接口技术，串口通信实验汇编代码，用到8251,8255,8253可编程芯片-Microcomputer Principle and Interface Technology, Serial communication test assembly code, programmable chips used in 8251,8255,8253

8255a 并行实验 微机原理与接口技术-8255 serial

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)