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RES b,(IX+d)
RES b,(IY+d)     Bit Reset     Rabbit 2000/3000/4000/5000 Instruction

Opcode	Instruction	Operation
DD CB d 86	RES 0,(IX+d)	(IX+d) = (IX+d) & ~bit 0
DD CB d 8E	RES 1,(IX+d)	(IX+d) = (IX+d) & ~bit 1
DD CB d 96	RES 2,(IX+d)	(IX+d) = (IX+d) & ~bit 2
DD CB d 9E	RES 3,(IX+d)	(IX+d) = (IX+d) & ~bit 3
DD CB d A6	RES 4,(IX+d)	(IX+d) = (IX+d) & ~bit 4
DD CB d AE	RES 5,(IX+d)	(IX+d) = (IX+d) & ~bit 5
DD CB d B6	RES 6,(IX+d)	(IX+d) = (IX+d) & ~bit 6
DD CB d BE	RES 7,(IX+d)	(IX+d) = (IX+d) & ~bit 7
FD CB d 86	RES 0,(IY+d)	(IY+d) = (IY+d) & ~bit 0
FD CB d 8E	RES 1,(IY+d)	(IY+d) = (IY+d) & ~bit 1
FD CB d 96	RES 2,(IY+d)	(IY+d) = (IY+d) & ~bit 2
FD CB d 9E	RES 3,(IY+d)	(IY+d) = (IY+d) & ~bit 3
FD CB d A6	RES 4,(IY+d)	(IY+d) = (IY+d) & ~bit 4
FD CB d AE	RES 5,(IY+d)	(IY+d) = (IY+d) & ~bit 5
FD CB d B6	RES 6,(IY+d)	(IY+d) = (IY+d) & ~bit 6
FD CB d BE	RES 7,(IY+d)	(IY+d) = (IY+d) & ~bit 7

Clocks	8-Bit Access	16-Bit Unaligned	16-Bit Aligned
Rabbit 2000/3000/4000	13	n/a	n/a
Rabbit 5000	14	12	10

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

Description

Resets bit b (any of the bits 0, 1, 2, 3, 4, 5, 6, or 7) of the data whose address is:

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

• the sum of IY and the 8-bit signed displacement d.

The bit is reset by performing a bitwise AND between the selected bit and its complement.