File list (Check if you may need any files):
6 4X4key\6 矩阵键盘指导书.pdf
........\EX6.1 4X4key\4x4key\4x4key.cof
........\............\......\4x4key.hex
........\............\......\4x4key.hxl
........\............\......\4x4key.map
........\............\......\4x4key.mcp
........\............\......\4x4key.mcs
........\............\......\4x4key.mcw
........\............\......\4x4key.sym
........\............\......\main.c
........\............\......\main.lst
........\............\......\main.obj
........\............\......\main.rlf
........\............\......\main.sdb
........\............\4x4key
........\EX6.1 4X4key
6 4X4key