BIT b,r     Bit Test     Rabbit 2000/3000/4000 Instruction

Opcode								Instruction	Clocks	Operation
b,r	A	B	C	D	E	H	L	BIT b,r	4(2,2)	r & b
0	CB 47	CB 40	CB 41	CB 42	CB 43	CB 44	CB 45
1	CB 4F	CB 48	CB 49	CB 4A	CB 4B	CB 4C	CB 4D
2	CB 57	CB 50	CB 51	CB 52	CB 53	CB 54	CB 55
3	CB 5F	CB 58	CB 59	CB 5A	CB 5B	CB 5C	CB 5D
4	CB 67	CB 60	CB 61	CB 62	CB 63	CB 64	CB 65
5	CB 6F	CB 68	CB 69	CB 6A	CB 6B	CB 6C	CB 6D
6	CB 77	CB 70	CB 71	CB 72	CB 73	CB 74	CB 75
7	CB 7F	CB 78	CB 79	CB 7A	CB 7B	CB 7C	CB 7D

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 r (any of the registers A, B, C, D, E, H, or L).

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