m6800/m6802 instruction set
Decrement Accumulator		What links here?
Decrement Accumulator
MemonicMode OpcodeCyclesBytes
DECA Inherent 4A 2 1
DECB Inherent 5A 2 1


A = A - 1
B = B - 1

Results:
N set if bit 7 is 1
Z set if all bits are 0
V operand = 1000000 before operation?
C not affected
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filename:microprocessors - MC6800/MC6802 - instruction set - Decrement Accumulator
filename:microprocessors%20%2D%20MC6800%2FMC6802%20%2D%20instruction%20set%20%2D%20Decrement%20Accumulator
last edit:January 31 2010 14:02:38 (5221 days ago)
ct = 1716102260.000000 = May 19 2024 03:04:20
ft = 1264964558.000000 = January 31 2010 14:02:38
dt = 451137702.000000