File list (Check if you may need any files):
yy信号量
........\EXL2-shell
........\..........\INCLUDES.H
........\..........\mystring.c
........\..........\mystring.h
........\..........\word.c
........\..........\word.h
........\..........\yyshell.c
........\..........\yyshell.h
........\..........\yyshellsub.c
........\..........\yyshellsub.h
........\INCLUDES.H
........\OS_CFG.H
........\OS_CORE.C
........\OS_CORE.LST
........\OS_CORE.OBJ
........\OS_CPU.H
........\OS_CPU_A.ASM
........\Os_cpu_a.LST
........\Os_cpu_a.OBJ
........\OS_CPU_C.C
........\Os_cpu_c.LST
........\Os_cpu_c.OBJ
........\OS_MBOX.C
........\OS_MEM.C
........\OS_Q.C
........\OS_SEM.C
........\OS_SEM.LST
........\OS_SEM.OBJ
........\OS_TASK.C
........\OS_TASK.LST
........\OS_TASK.OBJ
........\OS_TIME.C
........\OS_TIME.LST
........\OS_TIME.OBJ
........\serial.c
........\serial.h
........\UCOS_II.C
........\UCOS_II.H
........\Ucos_ii.LST
........\Ucos_ii.OBJ
........\yy
........\yy.c
........\yy.lnp
........\yy.M51
........\yy.Opt
........\yy.plg
........\yy.Uv2
........\yy1.c
........\yy1.LST
........\yy1.OBJ
........\yy_Opt.Bak
........\yy_Uv2.Bak