LDY - Plus/4 Encyclopedia



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LDY

Category
Reference/6502 Programming/Assembly

Topic
LDY - LoaD Y register

Affects Flags: S Z

Loads a memory byte (or an immediate value) into the Y register.

Examples
LDY #$00 Y register will be equal to zero
LDY $FF19 Y register will be equal to whatever the value of memory location $FF19 is

Opcodes

Addressing mode	Syntax	Opcode	Bytes	Cycles
Immediate addressing mode	LDY #$44	$A0	2	2
Zero Page	LDY $44	$A4	2	3
Zero Page,X	LDY $44,X	$B4	2	4
Absolute addressing mode	LDY $4400	$AC	3	4
Absolute,X	LDY $4400,X	$BC	3	4+

+ add 1 cycle if page boundary crossed

See Also
LDX, LDA