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使状态标志位CF清零的错误指令是 ()Mov and xor不影响标志位A.OR AX,AXB.SUB AX,AXC.MOV CF,0D
A.OR AX,AX
B.SUB AX,AX
C.MOV C
D.0
E.CLC
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A.OR AX,AX
B.SUB AX,AX
C.MOV C
D.0
E.CLC
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
A.(CF)=0,(SF)=0,(ZF)=0,(OF)=0
B.(CF)=1,(SF)=1,(ZF)=0,(OF)=0
C.(CF)=0,(SF)=0,(ZF)=1,(OF)=1
D.(CF)=1,(SF)=1,(ZF)=1,(OF)=1
假定ax=6987h,执行指令cmpax,0eb30h后,则标志位CF和OF的状态()。
A)0,0
B)0,1
C)1,0
D)1,1
A.(F)=0,(SF)=0,(ZF)=0,(OF)=0
B.(F)=1,(SF)=1,(ZF)=0,(OF)=0
C.(F)=0,(SF)=0,(ZF)=1,(OF)=1
D.(F)=1,(SF)=1,(ZF)=1,(0F)=1
A.它们都是按位操作的
B.指令XOR AX,AX执行后,结果不变,但是影响标志位
C.指令AND AL,0FH执行后,使AL的高4位清零,低4位不变
D.若DL=09H,CH=30H,执行OR,DL,CL后,结果为DL=39H
MOV AL , 79 ADD AL , 0B1H 上面指令执行后,设置的标志位 CF 和 OF 的值是()
A CF=0 , F=0
B CF=1 , F=1
C CF=0 , F=1
D.CF=1 , F=0
执行INC指令除对SF,ZF有影响外,还要影响的标志位为()
A OF, AF, PF
B OF, AF, CF
C OF, PF, CF
D AF, PF, CF