Based on 89C52 key test

key_test52\key_test
..........\key_test.c
..........\key_test.hex
..........\key_test.lnp
..........\key_test.LST
..........\key_test.M51
..........\key_test.OBJ
..........\key_test.Opt
..........\key_test.plg
..........\key_test.Uv2
..........\key_test_Opt.Bak
..........\key_test_Uv2.Bak
..........\LCD1602.c
..........\LCD1602.h
..........\STARTUP.A51
..........\STARTUP.LST
..........\STARTUP.OBJ

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