若(AX)=0122H,四个标志位CF、SF、ZF、OF的初始状态为0,问执行指令 SUB AX,0FFFH后,这4个标志位的状态是( )。A.ZF=0,SF=0,CF=O,OF=0B.ZF=0,SF=1,CF=1,OF=0C.ZF=1,SF=0,CF=0,OF=1D.ZF=1,SF=1,CF=1,OF=1
若(AX)=0122H,四个标志位CF、SF、ZF、OF的初始状态为0,问执行指令 SUB AX,0FFFH后,这4个标志位的状态是( )。
A.ZF=0,SF=0,CF=O,OF=0
B.ZF=0,SF=1,CF=1,OF=0
C.ZF=1,SF=0,CF=0,OF=1
D.ZF=1,SF=1,CF=1,OF=1
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