第四章 MCS-51汇编程序设计 本章在指令系统基础上，介绍51单片机汇编语言程序设计-Chapter IV MCS-51 assembly programming system based on this chapter in order to introduce the 51 single-chip assembly language programming

利用51单片机实现与电脑串口通信，同时利用偶校验(Using 51 single-chip microcomputer to communicate with the computer serial port, while using parity check)