ADD IX,xx
ADD IY,yy     Add Without Carry     Rabbit 2000/3000/4000 Instruction

Opcode	Instruction	Clocks	Operation
----	ADD IX,xx	4 (2,2)	IX = IX + xx
DD 09	ADD IX,BC	4 (2,2)	IX = IX + BC
DD 19	ADD IX,DE	4 (2,2)	IX = IX + DE
DD 29	ADD IX,IX	4 (2,2)	IX = IX + IX
DD 39	ADD IX,SP	4 (2,2)	IX = IX + SP
----	ADD IY,yy	4 (2,2)	IY = IY + yy
FD 09	ADD IY,BC	4 (2,2)	IY = IY + BC
FD 19	ADD IY,DE	4 (2,2)	IY = IY + DE
FD 29	ADD IY,IX	4 (2,2)	IY = IY + IX
FD 39	ADD IY,SP	4 (2,2)	IY = IY + SP

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

Description

IX or IY is summed with either itself or any of the registers BC, DE or SP. The result is stored in IX or IY.