5.区分下列指令有什么不同?(1)MOV A,20H和MOV A,#20H___________________________ (2)MOV A,@R1和MOVX A,@R1___________________________
举一反三
- 区分下列指令有什么不同?MOV A, 20H和MOV:A,#20H
- 根据下列程序段运行情况,将运行结果和指令分别补充完整。 (1)( );(A)=10H ( );(B)=10H ( );(A)=20H MOV 23H,A;(23H)=20H ( );(A)=21H MOV 24H,A;(24H)=21H INC A ;(A)=22H ( );(25H)= 22H (2)MOV A,#50H;(A)=( )H MOV R0,A;(R0)=( )H MOV @R0,#30H;(50H)=( )H ADD A,@R0;(A)=( )H MOVX @R0,A;(50H)=( )H
- 判断以下指令的正误。 (1) MOV R1,R2 (2)MOV 20H,@R3 (3)DEC DPTR (4)INC DPTR (5)MOVX A,@R1 (6)MOVC A,@DPTR (7)PUSH DPTR(8)CLR R1 (9)MOV 20H,30H (10)MOV F0,C (11) CPL R7 (12)RC A
- 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
- 执行如下三条指令①MOV R1,#30H ② MOV 40H,#0EH③MOV @R1,40H后,30H单元的内容是: