8051 led flash and the 2 keys control code run

key
...\lesson1
...\lesson1.c
...\lesson1.hex
...\lesson1.lnp
...\lesson1.LST
...\lesson1.M51
...\lesson1.OBJ
...\lesson1.plg
...\lesson1.uv2
...\lesson1.zip
...\lesson2
...\lesson2.lnp
...\lesson2.M51
...\lesson2.Opt
...\lesson2.plg
...\lesson2.Uv2
...\lesson2_Uv2.Bak
...\START_AD.A51
...\START_AD.LST
...\START_AD.OBJ

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