File list (Check if you may need any files):
5.键盘
......\矩阵键盘行列扫描
......\................\STARTUP.A51
......\................\STARTUP.lst
......\................\STARTUP.obj
......\................\anjian
......\................\anjian.M51
......\................\anjian.Opt
......\................\anjian.Uv2
......\................\anjian.hex
......\................\anjian.plg
......\................\anjian_Uv2.Bak
......\................\key.LST
......\................\key.OBJ
......\................\key.c