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MICROPROCESSOR INSTRUCTION REFERENCE->DECB

Decrement Accumulator B

Compatibility: 6800, 6802, 6803, 6303R, 6303X, 6303Y

B - 1 -> B

Condition Code Register

C  Not affected
V  Set if operand=%10000000 before execution, else cleared
Z  Set if result zero, else cleared
N  Set if result negative, else cleared
I  Not affected
H  Not affected

    
Addressing modeopcycbytesAssembler syntax
Implied:5A11DECB

(Sometimes more cycles)