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,@R1MOV @R1,40HMOV 40H,AMOV R1,#7FH
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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.MOVA,@R1MOV@R1,40HMOV40H,AMOVR1,#7FH若(R1
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,@R1MOV @R1,40HMOV 40H,AMOV R1,#7FH
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
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,@R1MOV @R1,40HMOV 40H,AMOV R1,#7FH
原始:
(R1)=30H,(A)=40H,(30H)=60H,(40H)=08H
变换:
MOV A,@R1 //将30H的数值送A,此时 A=60H
MOV @R1,40H //将40H地址的数据送30H地址,(30H)=08H
MOV 40H,A //将A中的数据送40H地址,(40H)=60H
MOV R1,#7FH //将立即数7FH送R1,R1=7FH
结果:
(R1)=7FH,(A)=60H,(30H)=08H,(40H)=60H
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,@R1MOV @R1,40HMOV 40H,AMOV R1,#7FH
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