ZiLOG eZ80

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
134
DEC IX/Y
Decrement
Operation
IX/Y ← IX/Y – 1
Description
The value contained in the specified Index Register, IX or IY, is decremented by 1.
Condition Bits Affected
None.
Attributes
Mnemonic Operand ADL Mode Cycle Opcode (hex)
DEC IX X 2 DD, 2B
DEC.S IX 1 3 52, DD, 2B
DEC.L IX 0 3 49, DD, 2B
DEC IY X 2 FD, 2B
DEC.S IY 1 3 52, FD, 2B
DEC.L IY 0 3 49, FD, 2B