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MICROPROCESSOR INSTRUCTION REFERENCE->DEC

Decrement Memory

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

M - 1 -> M

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	op	cyc	bytes	Assembler syntax
Index :	6A	6	2	DEC <exprn.>,X
Extend:	7A	6	3	DEC <exprn.>