Add ix/y, sp, Operation, Description – Zilog EZ80F916 User Manual
Page 108: Condition bits affected attributes
eZ80
®
CPU
User Manual
UM007715-0415
CPU Instruction Set
99
ADD IX/Y, SP
ADD without Carry
Operation
IX/Y
IX/Y+SP
Description
The CPU adds the contents of the multibyte Stack Pointer register (SP) to the contents of
the Index Register, IX or IY, and stores the results in the Index Register, IX or IY. In ADL
mode, or when the .L suffix is employed, SPL is used for SP. In Z80 mode, or when the .S
suffix is employed, SPS is used for SP.
Condition Bits Affected
Attributes
S
Not affected.
Z
Not affected.
H
Set if carry from bit 11; reset otherwise.
P/V
Not affected.
N
Reset.
C
Set if carry from MSB; reset otherwise.
Mnemonic
Operand
ADL Mode
Cycle
Opcode (hex)
ADD
IX,SP
X
2
DD, 39
ADD.S
IX,SP
1
3
52, DD, 39
ADD
.L
IX,SP
0
3
49, DD, 39
ADD
IY,SP
X
2
FD, 39
ADD.S
IY,SP
1
3
52, FD, 39
ADD
.L
IY,SP
0
3
49, FD, 39