已知(40H)=60H,(41H)=20H,R0=40H,R1=41H,执行如下指令后,41H单元中的内容是()MOV A,@R0; MOV @R1,A;
A: 60H
B: 20H
C: 40H
D: 41H
A: 60H
B: 20H
C: 40H
D: 41H
举一反三
- 中国大学MOOC: 已知(40H)=60H,(41H)=20H,R0=40H,R1=41H,执行如下指令后,41H单元中的内容是()MOV A,@R0; MOV @R1,A;
- 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)=______
- 已知:(30H)=23H,(31H)=13H,(40H)=72H,(41H)=08H 执行: MOV A,30H ADD A,40H DA A MOV 30H,A MOV A,31H ADDC A,41H DA A MOV 31H,A 则结果为:(30H)=______H,(31H)=______H,(40H)=______H,(CY)=______。
- 已知:(40H)=11H,(41H)=22H,R0=40H和R1=41H,试问如下指令执行后累加器A, 40H,41H和42H单元中的内容是什么? MOV A, @R0 MOV @R1, A MOV 42H, @R1 A: A=22H,(40H)=41H,(41H)=11H,(42H)=11H B: A=11H,(40H)=11H,(41H)=11H,(42H)=11H
- 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 (R1)=();(A)=();(30H)=();(40H)=()