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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

8250和8251的串行通信实验，收发采用查询方式-Query, send and receive serial communication experiment in 8250 and 8251

1)了解8251的内部结构、工作原理及与8086的接口逻辑。 2)掌握对8251的初始化编程方法，学会使用8251实现设备之间的串行通信。 3)设计8251的硬件连接及编写程序，实现自发自收。-1) to understand the 8251' s internal structure, working principle and with the 8086 interface logic. 2) to master the 8251 initialization program