设AX=AAH,顺序执行下列各条指令,填写空格。(1)XOR AX, 0FFFFH ;AX=(2)AND AX, 13A0H ;AX=(3)OR AX, 25C9H;AX=(4)TEST AX, 0004H;AX=
举一反三
- 已知AX寄存器的内容不为0,以下哪些指令执行后(AX)=0。( ) A: SUB AX,AX B: XOR AX,AX C: AND AX,0 D: OR AX,0 E: MOV AX,0 F: CMP AX,0
- 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
- 使AX=0,又不影响进位标志位CF的指令是() A: XOR AX,AX B: CMP AX,AX C: MOVAX,0 D: TEST AX,0
- 下列能使AX和CF 同时为零的指令是_______。? CMP AX,AX|SUB AX,AX|MOV AX,0|XOR AX,AX
- 设(AX)=9ABCH,(DX)=8765H PUSH AX PUSH DX POP AX POP DX 上述4条指令执行后,(AX)=_(1)__H,(DX)=__(2)__H