已知 (A) = 78H, (R5) = 60H,(60H)=50H,执行指令 MOV A，@R5后 （A）= __
A: 78H
B: 60H
C: 50H
D: 80H
A: 78H
B: 60H
C: 50H
D: 80H
举一反三
- 中国大学MOOC: 已知 (A) = 78H, (R5) = 60H,(60H)=50H,执行指令 MOV A，@R5后 （A）= __
- 假设（30H）=60H，（60H）=55H，则执行下列指令后，（A）=H,MOV R0,30HMOV A,@R0
- 已知（10H）=5AH,(2EH)=1FH, (40H)=2EH,(60H)=3DH<br/>执行下列程序段后:MOV 20H,60H MOV R1,20H MOV A,40H XCH A,R1 XCH A,60H XCH A,@R1 MOV R0,#10H XCHD A,@R0 (A)=______ ,(10H)=______ ,(2EH)=______ ,(40H)=______ ,(60H)=______
- 设R0=42H,(42H)=80H,A=48H,(50H)=08H,指出下列程序执行后，上述各单元内容的变化。 MOV A,@R0 MOV @R0,50H MOV 50H,A
- 执行前（A）=45H，执行下列指令后， MOV 60H ，#78H CJNE A， 60H, NEXT （A）=_______，（60H）=_______，CY=_______