Description: Keys pressed when timing starts, loosen buttons stop the clock, again have keys pressed again when the timer
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File list (Check if you may need any files):
MCS51按键计时仪
...............\key_time
...............\key_time.hex
...............\key_time.lnp
...............\key_time.M51
...............\key_time.Opt
...............\key_time.plg
...............\key_time.Uv2
...............\key_time_Opt.Bak
...............\key_time_Uv2.Bak
...............\NEW.C
...............\NEW.LST
...............\NEW.OBJ
...............\STARTUP.A51
...............\STARTUP.LST
...............\STARTUP.OBJ