8255 is an external expansion port 8051, you can extend the 8051 external i/o port

Packet : 972883968255.rar filelist
血羽8255\8255
血羽8255\8255.DSN
血羽8255\8255.hex
血羽8255\8255.lnp
血羽8255\8255.M51
血羽8255\8255.PWI
血羽8255\8255.uv2
血羽8255\Last Loaded 8255.DBK
血羽8255\main.c
血羽8255\main.LST
血羽8255\main.OBJ
血羽8255\snow
血羽8255\snow.c
血羽8255\snow.hex
血羽8255\snow.lnp
血羽8255\snow.LST
血羽8255\snow.M51
血羽8255\snow.OBJ
血羽8255\snow.Opt
血羽8255\snow.plg
血羽8255\snow.Uv2
血羽8255\snow_Uv2.Bak
血羽8255\STARTUP.A51
血羽8255\STARTUP.LST
血羽8255\STARTUP.OBJ
血羽8255

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