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  O  Overflow         T  Trap        A  Auxiliary Carry
  D  Direction        S  Sign        P  Parity
  I  Interrupt        Z  Zero        C  Carry
 
  1         Sets the flag unconditionally
  0         Clears the flag unconditionally
  ?         Randomly sets or clears the flag
  blank     No effect on the flag
  ±         Affects the flag according to result of instruction
                                    -♦-