问题描述:
若(R1)=30H,(A)=40H,(30H)=60H,(40H)=08H.试分析执行下列程序段后上述各单元内容的变化.
MOV A,@R1
MOV @R1,40H
MOV 40H,A
MOV R1,#7FH
MOV A,@R1
MOV @R1,40H
MOV 40H,A
MOV R1,#7FH
问题解答:
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