AND (AND Accumulator with Memory)¶

A = A AND [operand]

AND performs a bitwise AND operation on the accumulator register (A) and an operand. The result is then stored in the accumulator.

Addressing Modes¶

Addressing Mode	Opcode	Bytes	Cycles
Immediate	AND #const	`29 nn`	2
ZeroPage	AND zp	`25 nn`	3
ZeroPage+X	AND zp,x	`35 nn`	4
Absolute	AND addr	`2D ll hh`	4
Absolute+X	AND addr,x	`3D ll hh`	4-5
Absolute+Y	AND addr,y	`39 ll hh`	4-5
(Indirect+X)	AND (zp,x)	`21 nn`	6
(Indirect)+Y	AND (zp),y	`31 nn`	5-6

* Add 1 cycle if page boundary is crossed.

N (Negative) – Set if the result has the most significant bit set (i.e., is negative); otherwise, it is cleared.
Z (Zero) – Set if the result is zero; otherwise, it is cleared.

Sets A to 0x02
LDA #$FF
AND #$02

; Sets A to 0xA0
LDA #$F0
AND #$A5

; Sets A to 0x00
LDA #$FF
AND #$00