Describe: 89c51 matrix keyboard, digital display

File list(Click to check if it's the file you need, and recomment it at the bottom):
  �������\key
  ........\key.bak
  ........\key.c
  ........\key.hex
  ........\key.lnp
  ........\key.LST
  ........\key.M51
  ........\key.OBJ
  ........\key.Opt
  ........\key.plg
  ........\key.Uv2
  ........\key_Opt.Bak
  ........\key_Uv2.Bak
  �������