未分类题

已知：(30H)=37H，(31H)=21H，(50H)=75H，(51H)=10H执行以下子程序：
MOV R0,30H
MOV R1,50H
MOV R7,2
CLR C
LOOP：MOV A，@R0
ADDC A．@R1
DA A
MOV @R0．A
INC R0
INC R1
DJNZ R7，LOOP
RET
则结果为：(30H)=H，(31H)=H，(R1)=H，(R7)=H。

A.@R1
B.A

【参考答案】

12；32；52；0
12；32；52；0

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已知：(30H)=37H，(31H)=21H，(50H)=75H，(51H)=10H执行以下子程序： MOV R0,30H MOV R1,50H MOV R7,2 CLR C LOOP：MOV A，@R0 ADDC A．@R1 DA A MOV @R0．A INC R0 INC R1 DJNZ R7，LOOP RET 则结果为：(30H)=______H，(31H)=______H，(R1)=______H，(R7)=______H。