LDA

LDA

LDA - load the accumulator with a byte.

Description

LDA loads a byte into the accumulator. If the value is negative, the negative flag will be set. If the value is zero the zero flag will bet set.

Flags affected
N	Z	C	I	D	V
+	+	-	-	-	-

Addressing Mode	Assembly	OpCode	No. Bytes.	No. Cycles
Immediate	LDA #Oper	a9	2	2
Zero Page	LDA Oper	a5	2	3
Zero Page, X	LDA Oper, X	b5	2	4
Absolute	LDA Oper	ad	3	4
Absolute, X	LDA Oper, X	bd	3	4 [ 1 ]
Absolute, Y	LDA Oper, Y	b9	3	4 [ 1 ]
(Indirect, X)	LDA (Oper, X)	a1	2	6
(Indirect), Y	LDA (Oper), Y	b1	2	5 [ 1 ]

^{[ 1 ]} Add one if page crossed.

Examples

LDA Immediate

LDA #$02;

This will load the accumulator with the hexadecimal number $02

Related Pages

• STA
• LDX
• LDY