求助！！！

只看该作者 · 2007-4-27 19:39

我用的是keilc51软件
ORG 2000H
MOV R0,#40H
MOV R1,#41H
MOV A,R0
MOV 30H,A
MOV 20H,30H
MOV A,#30H
MOV @R0,A
MOV A,30H
MOV R7,A
MOV A,@R0
MOV R7,A
MOV DPTR,#0A702H
MOV 30H,R7
MOV 20H,@R0
MOV 21H,#10H
MOV @R0,21H
MOV @R1,#01H
END
这个程序我单步执行
怎么老是执行一个死循环啊
什么问题啊
在我编译的时候就又出现
Build target 'Target 1'
assembling Text1.asm...
linking...
*** WARNING L5: CODE SPACE MEMORY OVERLAP
    FROM:    0000H
    TO:      0002H
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  ?C_START
    MODULE:  .\STARTUP.obj (?C_STARTUP)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  ?C_START
    MODULE:  .\STARTUP.obj (?C_STARTUP)
    ADDRESS: 202AH
Program Size: data=9.0 xdata=0 code=8239
"2" - 0 Error(s), 3 Warning(s).

到底是怎么回事啊
请大家可怜我这个新人吧