DEC (HL)
DEC (IX+d)
DEC (IY+d)     Decrement     Rabbit 2000/3000/4000 Instruction

Opcode	Instruction	Clocks	Operation
35	DEC (HL)	8 (2,1,2,3)	(HL) = (HL) - 1
DD 35 d	DEC (IX+D)	12 (2,2,2,1,2,3)	(IX+d) = (IX+d) - 1
FD 35 d	DEC (IY+D)	12 (2,2,2,1,2,3)	(IY+d) = (IY+d) - 1

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

Description

Decrements the byte whose address is:

• HL, or
• 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.