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> DEC r Decrement Rabbit 2000/3000/4000 Instruction

> Opcode | Instruction | Clocks | Operation
> ---- | DEC r | 2 | r = r - 1
> 3D | DEC A | 2 | A = A - 1
> 05 | DEC B | 2 | B = B - 1
> 0D | DEC C | 2 | C = C - 1
> 15 | DEC D | 2 | D = D - 1
> 1D | DEC E | 2 | E = E - 1
> 25 | DEC H | 2 | H = H - 1
> 2D | DEC L | 2 | L = L - 1

> Flags | ALTD | IOI/IOE
> S | Z | L/V | C | F | R | SP | S | D
> · | · | V | - | · | · |  |  |

> #### Description

> Decrements r (any of the registers A, B, C, D, E, H, or L).

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