Description: P1 port external 4 × 4 keys, keys used to read out the method of " look-up table" and " reversal." Look-up table of the most short program, but take a little bit more storage space reversal of the fastest program execution, but requires a two-way interface.
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File list (Check if you may need any files):
4 4key\16key
......\16key.hex
......\16key.lnp
......\16key.M51
......\16key.Opt
......\16key.plg
......\16key.Uv2
......\16key_Uv2.Bak
......\key.c
......\key.LST
......\key.OBJ
4 4key