本综合实验是将并行口8255A的输出与输入功能与键盘与显示器接口芯片功能综合起来，在“DVCC—51Net单片机综合实验系统”硬件电路许可的条件下，将“实验二并行I/O接口8255A应用”与“实验六键盘显示控制器8279应用实验”整合起来，进行综合实验。综合实验内容有2个方案：

方案一，利用键盘显示控制器8279的键盘输入去控制并行I/O接口8255A的PB口输出。

方案二，利用并行I/O接口8255A的PA口输入功能去控制键盘显示控制器8279的显示输出。

-The comprehensive test is the parallel port 8255A' s output and input functions and the keyboard and display interface chip functions together, the " DVCC-51Net single chip integrated experimental system"　hardware circuit conditions permit, the " experiment two parallel I/O interfaces 8255A Application " and"　experimental application of six keyboard display controller 8279 experiment " to integrate, comprehensive experiment. Comprehensive experimental content with 2 options: Option One, using the keyboard display controller 8279 of the keyboard input to control the parallel I/O interfaces 8255A of the PB port output. Programme II, using parallel I/O interfaces 8255A' s PA input port to control the keyboard and display controller 8279 displays the output.