题目内容
(请给出正确答案)
[单选题]
下列指令中,不影响标志位SF位的指令是()
A.RCL AX,1
B.SAR AX,1
C.DC AX,SI
D.ND BH,OFH
答案
A、RCL AX,1
如果结果不匹配,请 联系老师 获取答案
A.RCL AX,1
B.SAR AX,1
C.DC AX,SI
D.ND BH,OFH
A、RCL AX,1
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
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
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
假设(AL)=0FFH,依次执行ADD AL,12和AND AL,0FH指令后,标志位ZF和 SF的状态分别为()。
A.0和0
B.0和1
C.1和0
D.1和1
A.OR AX,AX
B.SUB AX,AX
C.MOV C
D.0
E.CLC