debug 中各标记位

NV   UP   EI   PL   NZ   NA   PO   NC
这个是符号值对应表:

溢出标志OF(Over flow flag)                             OV(1)                         NV(0)

方向标志DF(Direction flag)                             DN(1)                          UP(0)

中断标志IF(Interrupt flag)                                EI(1)                           DI(0)

符号标志SF(Sign flag)                                     NG(1)                          PL(0)

零标志ZF(Zero flag)                                        ZR(1)                         NZ(0)

辅助标志AF(Auxiliary carry flag)                      AC(1)                          NA(0)

奇偶标志PF(Parity flag)                                  PE(1)                          PO(0)

进位标志CF(Carry flag)                                  CY(1)                         NC(0)

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