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MICROPROCESSOR INSTRUCTION REFERENCE->BIT

BIT b,s  Test bit b of operand s (register r or indirectly addressed memory location)

Z <- inverse of bit value

Flags
    

S	Unknown
Z	Set if bit zero, else cleared
H	Set always
P/V	Unknown
N	Cleared
C	Not affected

Assembler syntax: BIT <exprn.>,s
    

s:	No of	M	T	usec @
	bytes	cycles	states	2 MHz

r	2	2	8	4
(HL)	2	3	12	6
(IX+d)	4	5	20	10
(IY+d)	4	5	20	10

r may be one of A,B,C,D,E,H,L