根据下列伪指令语句,105H和10AH单元的内容是( ) ORG 100H STR DB ‘ABCDEFGH’ DW ‘?’ DB 10H,20H
A: 45H,3FH
B: 46H,10H
C: 45H,10H
D: 46H,20H
A: 45H,3FH
B: 46H,10H
C: 45H,10H
D: 46H,20H
举一反三
- 如果(A)=45H,(R1)=20H,(20H)=12H,执行XCHD A, @ R1后,结果(A)= ______ H,(20H)= ______ H。
- 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
- 【填空题】若(R0)=10H,(10H)=1EH,(A)=29H,执行完“XCHD A,@R0”指令后,则(A)=()H,(10H)=()H
- 已知(A)=01H,(SP)=50H,(DPTR)=100H。则下述程序段执行后 (A)、(B)、(SP)、(DPH)、Acc.7的结果为( )。 RL A MOV B,A MOVC A,@A+DPTR PUSH Acc SJMP $ ORG 100H DB 10H,20H,30H A: 30H,2,51H,01H,0 B: 20H,02H,4FH,10H,0 C: 30H,02H,51H,01H,1 D: 20H,4,50H,00H,1
- 读图完成以下问题。 A: 10<H<30 B: 30<H<50 C: 20<H<30 D: 40<H<50