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Decrement                                        Flags:  O D I T S Z A P C
Syntax:  DEC dest                                        ═════════════════
                                                         ±       ± ± ± ±
 
 
  Subtracts 1 from the destination operand. Because the operand is treated
  as an unsigned integer, the DEC instruction does not affect the carry
  flag. If a signed borrow requires detection, use the SUB instruction.
                                    -♦-