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

Opcode	Instruction	Operation
----	BIT b,(IX+d)	(IX+d) & bit
DD CB d 46	BIT 0,(IX+d)	(IX+d) & bit 0
DD CB d 4E	BIT 1,(IX+d)	(IX+d) & bit 1
DD CB d 56	BIT 2,(IX+d)	(IX+d) & bit 2
DD CB d 5E	BIT 3,(IX+d)	(IX+d) & bit 3
DD CB d 66	BIT 4,(IX+d)	(IX+d) & bit 4
DD CB d 6E	BIT 5,(IX+d)	(IX+d) & bit 5
DD CB d 76	BIT 6,(IX+d)	(IX+d) & bit 6
DD CB d 7E	BIT 7,(IX+d)	(IX+d) & bit 7
----	BIT b,(IY+d)	(IY+d) & bit
FD CB d 46	BIT 0,(IY+d)	(IY+d) & bit 0
FD CB d 4E	BIT 1,(IY+d)	(IY+d) & bit 1
FD CB d 56	BIT 2,(IY+d)	(IY+d) & bit 2
FD CB d 5E	BIT 3,(IY+d)	(IY+d) & bit 3
FD CB d 66	BIT 4,(IY+d)	(IY+d) & bit 4
FD CB d 6E	BIT 5,(IY+d)	(IY+d) & bit 5
FD CB d 76	BIT 6,(IY+d)	(IY+d) & bit 6
FD CB d 7E	BIT 7,(IY+d)	(IY+d) & bit 7

Clocks	8-Bit Access	16-Bit Unaligned	16-Bit Aligned
Rabbit 2000/3000/4000	10	n/a	n/a
Rabbit 5000	11	9	7

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

Description

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

• the sum of data in IX plus the 8-bit signed displacement value d, or

• the sum of data in IY plus the 8-bit signed displacement value d.

The Z flag is set if the tested bit is 0, reset if the bit is 1.