ADD A,(IX+d)
ADD A,(IY+d)     Add Without Carry     Rabbit 2000/3000/4000 Instruction

Opcode	Instruction	Clocks	Operation
DD 86 d	ADD A,(IX+d)	9 (2,2,2,1,2)	A = A + (IX+d)
FD 86 d	ADD A,(IY+d)	9 (2,2,2,1,2)	A = A + (IY+d)

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
·	·	V	·	·	·		·

Description

A is summed with the data whose address is:

• the sum of IX and the 8-bit signed displacement value d, or
• the sum of IY and the 8-bit signed displacement value d

The result is stored in A.

The Rabbit 4000 assembler views "ADD A,(IX+d)" and "ADD (IX+d)" as equivalent instructions. In the latter case, A is used even though it is not explicitly stated. The same is true for "ADD A,(IY+d)" and "ADD (IY+d)."