File list (Check if you may need any files):
OS_KEY_OK
.........\KEILC51
.........\.......\OS_CPU_A.ASM
.........\.......\OS_CPU_C.C
.........\KEY
.........\...\CONFIG.H
.........\...\led
.........\...\led.c
.........\...\led.hex
.........\...\led.OBJ
.........\...\led.Opt
.........\...\led.plg
.........\...\led.Uv2
.........\...\led_Opt.Bak
.........\...\OS_CFG.H
.........\...\Os_core.obj
.........\...\OS_CPU.H
.........\...\Os_cpu_a.obj
.........\...\Os_cpu_c.obj
.........\...\Os_q.obj
.........\...\Os_sem.obj
.........\...\readme.TXT
.........\...\test.Opt
.........\...\TEST.PLG
.........\Last Loaded 数码管.DBK
.........\led.hex
.........\OS
.........\..\OS.H
.........\..\OS_CORE.C
.........\..\OS_MEM.C
.........\..\OS_MEM.H
.........\..\OS_Q.C
.........\..\OS_Q.H
.........\..\OS_SEM.C
.........\..\OS_SEM.H
.........\数码管.DSN
.........\数码管.PWI