ZiLOG eZ80 User Manual

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
359
SUB A, (IX/Y+d)
Subtract without Carry
Operation
A ← A – (IX/Y + d)
Description
The ( IX/Y + d ) operand is an 8-bit value at the memory location specified by the contents
of the Index Register, IX or IY, added to the two’s-complement displacement
d . This 8-bit
value is subtracted from the contents of the accumulator, A. The result is written to the
accumulator.
Condition Bits Affected
Attributes
S Set if result is negative; reset otherwise.
Z Set if result is 0; reset otherwise.
H Set if borrow from bit 4; reset otherwise.
P/V Set if overflow; reset otherwise.
N Set.
C Set if borrow; reset otherwise.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
SUB A,(IX+d)X 4 DD, 96, dd
SUB.S A,(IX+d)1 5 52, DD, 96, dd
SUB.L A,(IX+d)0 5 49, DD, 96, dd
SUB A,(IY+d)X 4 FD, 96, dd
SUB.S A,(IY+d)1 5 52, FD, 96, dd
SUB.L A,(IY+d)0 5 49, FD, 96, dd

ZiLOG eZ80 Specifications

General

Brand	ZiLOG
Model	eZ80
Category	Computer Hardware
Language	English