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[主观题]
MOVAX,0和XORAX,AX两条指令的功能()。
A.完全一样
B.都将AX清零
C.执行后AX值不一致
D.将AX置负
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.完全一样
B.都将AX清零
C.执行后AX值不一致
D.将AX置负
MOVAH, CX;
MOV33H,AL;
MOVAX, [SI][DI];
MOV[BX],[SI];
ADDBYTEPTR[BP], 256;
MOVDATA[SI],ES: AX;
JMPBYTEPTR[BX];
OUT230H,AX;
MOVDS,BP;
MUL 39H。
(1) MOV AX, TABLE
(2) LEA AX, TABLE
A.MOVCS,20A0H
B.ASSUMECS:COSE
C.ENDSTART
D.MOVAX,COSEMOVCS,AX
A.ADC AX ,0
B.SHL AX ,1
C.ROL AX ,1
D.RCL AX,1
使状态标志位 CF 清零的错误指令()
A CLC
B XOR AX,AX
C SUB AX,AX
D MOV CF,0
设 (AL=63H (BL=29H 执行下面指令后 SUB AL,BL DAS AX的内容()
A (AX=0304H
B (AX=0034
C (AX=0034H
D (AX=0304
XOR AX,AX MOV AL,90H CWD 执行上述指令后,结果为()
A (DX=0000, (AX=FF90H
B (DX=FFFFH,(AX=0090H
C (DX=FFFFH,(AX=FF90H
D(DX=0000, (AX=0090H
A.OR AX,AX
B.SUB AX,AX
C.MOV C
D.0
E.CLC