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MICROPROCESSOR INSTRUCTION REFERENCE->DECB

DECB        Decrement Accumulator B

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 modeAssembler syntax
Implied:DECB