6502 opcodes - SERP Analysis

http://www.6502.org/tutorials/6502opcodes.html

https://www.masswerk.at/6502/6502_instruction_set.html

https://www.pagetable.com/c64ref/6502/?tab=2

https://www.nesdev.org/wiki/6502_instructions

https://pastraiser.com/cpu/6502/6502_opcodes.html

https://llx.com/Neil/a2/opcodes.html

http://www.ffd2.com/fridge/docs/6502-NMOS.extra.opcodes

https://wiki.cdot.senecapolytechnic.ca/wiki/6502_Instructions_-_Introduction

http://www.6502.org/tutorials/65c02opcodes.html

https://www.reddit.com/r/EmuDev/comments/jm2gar/6502_decoding_instructions_hex/

https://www.nesdev.org/obelisk-6502-guide/reference.html

https://www.oxyron.de/html/opcodes02.html

https://en.wikipedia.org/wiki/MOS_Technology_6502

https://www.masswerk.at/nowgobang/2021/6502-illegal-opcodes

https://news.ycombinator.com/item?id=39975637

https://datacrystal.tcrf.net/wiki/6502_opcodes

https://www.youtube.com/watch?v=H7oAlRKyVOY

https://www.reddit.com/r/beneater/comments/ujtza8/hi_today_i_finished_writing_this_document_which/

https://github.com/ornata/6502/blob/master/opcodes.c

https://stardot.org.uk/forums/viewtopic.php?t=20779

http://retro.hansotten.nl/uploads/mag6502/Analysis%20of%20the%20Use%20of%20the%206502's%20Opcodes.pdf

https://unfinishedbitness.info/2014/03/22/6502-the-instructions/

https://retrocomputing.stackexchange.com/questions/21855/was-leaving-all-xxxxxx11-opcodes-unused-on-the-6502-a-deliberate-design-choice

https://emudev.de/nes-emulator/opcodes-and-addressing-modes-the-6502/

https://nybblesandbytes.net/6502/

https://retrogamecoders.com/6502-processor/6502-instructions/

https://news.ycombinator.com/item?id=27402655

https://github.com/jtgans/6502ops

https://6502.co.uk/lesson/what-is-an-opcode

http://ivop.free.fr/atari/opcodes.html

https://www.scribd.com/document/439173807/6502-OpCodes-xlsx

https://csvbase.com/calpaterson/opcodes-6502

https://analog-hors.github.io/site/pones-p1/

https://mdfs.net/Docs/Comp/65816/intro.htm

https://www.amazon.com/8bitworkshop-6502-Opcodes-Tee/dp/B07S6SBF7P

https://www.atarimania.com/documents/6502%20(65xx)%20Microprocessor%20Instant%20Reference%20Card.pdf

https://www.lemon64.com/forum/viewtopic.php?t=70930

https://blog.adafruit.com/2025/05/19/6502-illegal-opcodes-in-the-siemens-pc-100-assembly-manual/

https://www.akk.org/~flo/6502%20OpCode%20Disass.pdf

https://www.middle-engine.com/blog/posts/2020/06/23/programming-the-nes-the-6502-in-detail

https://stardot.org.uk/forums/viewtopic.php?t=26163

https://qrack.readthedocs.io/en/latest/api/6502.html

https://javier-varez.github.io/mos6502_docs/processor_architecture/isa.html

https://retrocomputing.stackexchange.com/questions/25282/why-doesnt-the-nmos-6502-have-the-illegal-instruction-sta-immediate

https://www.vic-20.it/wp-content/uploads/2021/07/6502.pdf

http://ftp.pigwa.net/stuff/collections/nir_dary_cds/Tech%20Info/6502/opcodes.html

https://www.youtube.com/watch?v=UGl1XsZVdW4

https://www.csh.rit.edu/~moffitt/docs/6502.html

https://www.atariarchives.org/2bml/chapter_10.php

https://codebase64.org/doku.php?id=base:extra_instructions_of_the_65xx_series_cpu

https://www.facebook.com/groups/483352838846575/posts/677334066115117/

https://mdfs.net/Docs/Comp/6502/OpList

https://blogs.oregonstate.edu/ericmorgan/2022/01/21/6502-addressing-modes/

https://c64os.com/post/6502instructions

https://www.cs.otago.ac.nz/cosc243/pdf/6502Poster.pdf

https://c74project.com/microcode/

https://stackoverflow.com/questions/48311558/6502-how-to-get-instruction-from-opcode

https://atariwiki.org/wiki/attach/Assembler/6502%20OpCodes.xlsx

https://tutorial-6502.sourceforge.io/specification/instructions/

https://alienbill.com/2600/101/docs/onestep.html

https://www.orenwatson.be/6502machinecode.htm

https://scarybeastsecurity.blogspot.com/2016/11/0day-exploit-compromising-linux-desktop.html

https://en.wikibooks.org/wiki/6502_Assembly

https://lateblt.livejournal.com/87418.html

http://www.cbmhardware.de/show.php?r=14&id=8/Opcodes%20des%206502-Assembler%5B

https://www.youtube.com/watch?v=-AbtkuW07XY

http://www.romdetectives.com/Wiki/index.php?title=6502_Opcodes

https://wiki.cdot.senecapolytechnic.ca/wiki/6502_Assembly_Language_String_Lab

https://wiki.cdot.senecacollege.ca/wiki/6502

http://www.einarvalur.co/worklets/6502-instruction-set

https://wiki.preterhuman.net/6502_Undocumented_Opcodes

https://hackaday.com/2025/06/11/randomly-generating-atari-games/

https://m.youtube.com/watch?v=6tNSxabHqRI&pp=ygUbI2hleGFkZWNpbWFsdG9iaW5hcnllbmNvZGVy

https://www.youtube.com/watch?v=cLdZvM7q7Jg

https://www.c64-wiki.de/wiki/%C3%9Cbersicht_6502-Assemblerbefehle

https://m.youtube.com/watch?v=PxZGoiWvA4A&pp=ygULI3R1b21vbGFpbmU%3D

https://cheatsheets.one/tech/6502

https://dwheeler.com/6502/oneelkruns/6502sum.html

https://www.youtube.com/watch?v=zwSVNcuYhy4

https://mirrors.apple2.org.za/ftp.apple.asimov.net/documentation/programming/6502assembly/Micro%20Logic%206502%20Quick%20Reference%20Card.pdf

https://en.wikipedia.org/wiki/Comparison_of_instruction_set_architectures

https://www.youtube.com/watch?v=g2ZeLIPxI0A

https://www.youtube.com/watch?v=Jr78_Q731RM

https://www.youtube.com/watch?v=fdf4EunsR1A

https://atariwiki.org/wiki/Wiki.jsp?page=Advanced%206502%20Assembly%20Code%20Examples

http://wouter.bbcmicro.net/general/6502/6502_opcodes.html

https://retro-computers.fandom.com/wiki/6502_Instruction_Set