AND

AND performs a logical And of the value in the accumulator with that of the memory location with the result stored in the accumulator.

The result will be each bit in the accumulator will be set ONLY if that same bit was set in the original accumulator value and the memory. If the bits were different then the resultant bit will be 0.

AND truth table

First Operand		1
	0	0
	1	1

For 8-bit processors n has the value of bit 7 and v the value of bit 6 of the memory location.

For 16-bit processors, when m=0, n has the value of bit 15 and v the value of bit 14 of the memory location.

Second it performs a logical AND of the memory and the accumulator. If the result is zero the z flag is set.

In both operations, the contents of the accumulator and memory are not modified.

Flags Affected

Flags

Set if most significant bit of result is set

Set if result is zero, otherwise clear

Instructions

Syntax	Opcode	Available on:			# of	# of	Addressing Mode
Syntax	(hex)	6502	65C02	65816	bytes	cycles	Addressing Mode
AND #const	29	x	x	x	2¹	2²	Immediate
AND addr	2D	x	x	x	3	4²	Absolute
AND long	2F			x	4	5²	Absolute Long
AND dp	25	x	x	x	2	3^{2, 3}	Direct Page
AND (dp)	32		x	x	2	5^{2, 3}	Direct Page Indirect
AND [dp]	27			x	2	6^{2, 3}	Direct Page Indirect Long
AND addr,X	3D	x	x	x	3	4^{2, 4}	Absolute Indexed X
AND long,X	3F			x	4	5²	Absolute Long Indexed X
AND addr,Y	39	x	x	x	3	4^{2, 4}	Absolute Indexed Y
AND dp,X	35	x	x	x	2	4^{2, 3}	Direct Page Indexed X
AND (dp,X)	21	x	x	x	2	6^{2, 3}	Direct Page Indexed Indirect X
AND (dp),Y	31	x	x	x	2	5^{2, 3, 4}	Direct Page Indirect Indexed Y
AND [dp],Y	37			x	2	6^{2, 3}	Direct Page Indirect Long Indexed Y
AND sr,S	23			x	2	4²	Stack Relative
AND (sr,S),Y	33			x	2	7²	Stack Relative Indirect Indexed Y

Notes:

65816: Add 1 byte if m=0 (16-bit memory/accumulator)
65816: Add 1 cycle if m=0 (16-bit memory/accumulator)
65816: Add 1 cycle if low byte of Direct Page register is not 0
Add 1 cycle if adding index crosses a page boundary

Table of Contents

Flags Affected

Instructions

Notes: