External IO port extension set, including the expansion IO port chip chip 8155,8255,8243 and many other extended procedures, all using C language. Contribute for your reference!

1.4
...\8155驱动程序
...\............\config.h
...\............\driber8155.Uv2
...\............\drive8155.c
...\8255驱动程序
...\............\config.h
...\............\drive8255.c
...\............\drive8255.Uv2
...\用8243扩展IO接口
...\................\config.h
...\................\drive8243.c
...\................\drive8243.Uv2

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