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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 mode | Assembler syntax |
Implied: | DECB |