利用8086平台实现8255并口通讯，方便于小键盘的实验！-use 8086 8255 platform parallel communications, to facilitate the experimental small keyboard!

电子时钟课程设计，用汇编语言编写,键盘的扫描需要用两个输入输出端口控制，数码管的显示需要两个输出端口控制，所以可以用8255的A口和B口控制键盘-Electronic clock curriculum design, with the compilation of languages, the keyboard scanning needs with two input and output port control, LED display to control two output port

用89C51、8255、8279以及其他元件构成的应用电路，含有LED灯、键盘等。-With 89C51, 8255,8279 and other components of an application circuit containing LED lights, keyboards and so on.

使用可编程并行I/O接口芯片8255、地址译码器、七段数码管等硬件，搭建七段数码管显示装置，实现键盘输入两个数字的ASCII码、数码管可动态显示这两个数字的功能。(Using programmable parallel I/O interface chip 8255, address decoder, seven segment digital tube and other hardware, build seven segment digital tube display device, re