设DS=2000H,SS=4000H, BX=1000H,BP=1000H, (21000H)=1234H, ...
单项选择题设DS=2000H,SS=4000H, BX=1000H,BP=1000H, (21000H)=1234H, (21002H)=5678H,(41000H)=3456H, (41002H)=789AH。写出下列三条指令执行后的结果。(注:答案和答案之间用一个空格分开) (1)MOV AX, DS:[1000H] AX=_____________H。 (2)MOV AL,BYTE PTR [BX+2] AL=_____________H。 (3)MOV AH, [BP] AH=_____________H。