Add a, (ix/y+d), Operation, Description – Zilog EZ80F916 User Manual
Page 99: Condition bits affected attributes
eZ80
®
CPU
User Manual
UM007715-0415
CPU Instruction Set
90
ADD A, (IX/Y+d)
ADD without Carry
Operation
A A+(IX/Y+d)
Description
The (IX/Y+d) operand is an 8-bit value retrieved from the memory location specified by
the contents of the Index Register, IX or IY, offset by the two’s complement displacement
d
. This 8-bit value is added to the contents of the accumulator, A. The result is stored in
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 carry from bit 3; reset otherwise.
P/V
Set if overflow; reset otherwise.
N
Reset.
C
Set if carry from bit 7; reset otherwise.
Mnemonic
Operand
ADL Mode
Cycle
Opcode (hex)
ADD
A,(IX+d)
X
4
DD, 86, dd
ADD.S
A,(IX+d)
1
5
52, DD, 86, dd
ADD
.L
A,(IX+d)
0
5
49, DD, 86, dd
ADD
A,(IY+d)
X
4
FD, 86, dd
ADD.S
A,(IY+d)
1
5
52, FD, 86, dd
ADD.L
A,(IY+d)
0
5
49, FD, 86, dd