执行下列指令后:(A)=____[br][/br] MOV 40H, #30H[br][/br] MOV R0, #40H[br][/br] MOV A,@R0
举一反三
- 执行如下三条指令后,30H单元的内容是( )。[br][/br]MOV R1, #30H[br][/br]MOV 40H, #0EH[br][/br]MOV @R1, 40 A: 40H B: 30H C: 0EH D: FFH
- 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)=______
- 已知累加器(A)=40H,(R0)=40H,内部RAM(30H)=50H ,(40H)=60H, 执行完后一下哪条指令后A的内容为40H 。( ) A: MOV A, B: 30H C: MOV A,30H D: MOV A,R0 E: MOV A,@R0
- 执行下列程序后,(R1)=____,(A)=____。[br][/br]NEXT:[br][/br] MOV R0,#00H[br][/br] MOV A,R0[br][/br] JZ LOOP[br][/br] MOV R1,#0FFH[br][/br] RET[br][/br]LOOP:MOV R1,#05H[br][/br] RET
- 执行如下三条指令后，30H单元的内容是（ ） MOV R1，#30H MOV 40H，#0EH MOV @R1，40H