SP=59H,执行PUSH 30H以后,SP的值是
A: 30H
B: 31H
C: 59H
D: 5AH
A: 30H
B: 31H
C: 59H
D: 5AH
举一反三
- 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)=______。
- 设堆栈指针SP的初值为2000H,AX=3000H,BX=5000H,试问:(1)执行指令PUSH AX后SP= H(2)再执行PUSH BX及POP AX后,SP= H,AX= H(3)最后执行POP BX后,SP= H,BX= H
- 如果(A)=5CH,(R0)=30H,(30H)=7AH,执行XCHD A, @R0;结果(A)=_______H,((R0))=_______H。
- 写出下列程序段执行后AX的值为多少? MOV AX, 1234H; AX=(1)H MOV CL, 4 AND AL, 0FH; AX= (2) H ADD AL, 30H; AX= (3)H SHL AH, CL; AX= (4)H AND AH, 0F3H; AX= (5)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