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AND

Category
Reference/6502 Programming/Assembly

Topic
AND (bitwise AND with accumulator)
Affected flags: S Z

This opcode performs a bitwise AND operation between Accumulator and the operand. The end result will always be in the Accumulator.

Example
LDA $FF07
AND #$40 at this point, A will contain $FF07 AND $40 = $00 (on PAL systems) or $40 on NTSC systems.
BEQ pal_stuff

Addressing mode	Syntax	Opcode	Bytes	Cycles
Immediate addressing mode	AND #$44	$29	2	2
Zero Page	AND $44	$25	2	2
Zero Page,X	AND $44,X	$35	2	3
Absolute	AND $4400	$2D	3	4
Absolute,X	AND $4400,X	$3D	3	4+
Absolute,Y	AND $4400,Y	$39	3	4+
Indirect,X	AND ($44,X)	$21	2	6
Indirect,Y	AND ($44),Y	$31	2	5+

+ add 1 cycle if page boundary crossed

See Also
EOR, ORA