以下指令中,采用直接寻址方式的是哪一个?
A: MOV A,40H
B: MOV A,
C: 40H
D: MOV 40H,
E: 40H
F: MOV R0, A
A: MOV A,40H
B: MOV A,
C: 40H
D: MOV 40H,
E: 40H
F: MOV R0, A
举一反三
- 执行下列指令后: MOV 40H,#48 MOV R0,#40H MOV A,@R0A=( ).
- 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)=______。
- 属于直接寻址的指令是() A: MOV A R1 B: MOV A #8DH C: MOV A 40H D: MOV 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)=______
- 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)=()