检测点11.4
下面的程序执行后:(ax)=?
Mov ax,0
Push ax
Popf
Mov ax,0fff0h
Add ax,0010h
Pushf
Pop ax
And al,11000101B
And ah,00001000B
分析
Add ax,1110h后
 Ax=10000h,则 CF=1，ZF=1，PF=1
 Pushf后 flag高位为0，低位根据下面的表为01000101b
 And al,11000101B执行后 al=01000101b+11000101B=01000101=45h
 And ah,00001000B执行后ah=00000000B+00001000B=0h
15    14   13   12   11   10   9    8     7    6    5    4    3    2    1    0
                                OF        DF        IF        TF        SF        ZF                AF                PF                CF
所以ax=45h.