半矩阵键盘
..........\halfkey.c
..........\halfkey.h
..........\halfkey.LST
..........\halfkey.OBJ
..........\keyboard
..........\keyboard.hex
..........\keyboard.M51
..........\keyboard.Opt
..........\keyboard.plg
..........\keyboard.Uv2
..........\keyboard_Opt.Bak
..........\keyboard_Uv2.Bak
..........\STARTUP.A51
..........\STARTUP.lst
..........\STARTUP.obj