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LDY: Difference between revisions

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'''LDY''' (Load Y) is a 65x instruction that loads the [[Y index register]].  In [[immediate addressing]] only, LDY takes a total of 3 bytes when the index registers are 16 bits wide.
'''LDY''' (Load Y) is a 65x instruction that loads a value into the [[Y index register]].  In [[immediate addressing]] only, LDY takes a total of 3 bytes when the index registers are 16 bits wide.


==== Syntax ====
==== Syntax ====

Revision as of 11:36, 25 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Immediate A0 2/3 bytes 2 cycles*
Absolute AC 3 bytes 4 cycles*
Direct Page A4 2 bytes 3 cycles*
Absolute Indexed by X BC 3 bytes 4 cycles*
Direct Page Indexed by X B4 2 bytes 4 cycles*
Flags Affected
N V M X D I Z C
N . . . . . Z .

LDY (Load Y) is a 65x instruction that loads a value into the Y index register. In immediate addressing only, LDY takes a total of 3 bytes when the index registers are 16 bits wide.

Syntax

LDY #const
LDY addr
LDY dp
LDY addr, X
LDY dp, X
Cycle Penalties

See Also

External Links

Retrieved from "https://sneslab.net/mw/index.php?title=LDY&oldid=19081"