Shoot, you're right - sorry, it's a different page that has the patches.
A description of the approach is here:
https://www.neogeocdworld.info/html/aid ... ctions.htm
but the specifics of the protection vary from game to game (anywhere from a lockup to deliberately altering game mechanics). The method of disabling the trigger remains more or less the same.
There's more information in this archive (including patches - yes, it looks shady, but it's legit):
https://disk.yandex.com/d/XJVJmTzh7XnJr
There was a MiSTer discussion on the topic:
viewtopic.php?t=3016
I hand-cracked all of my own (because I wanted very specific revisions and the like), but for the lazy (not mine, but same net effect):
https://archive.org/download/RealBoutFa ... Removed.7z
or
https://archive.org/download/chd_neogeo ... D-Cracked/
If you know a touch of 68K assembly, the documentation above is all you need to do it yourself by hand.
The set I have patched on my own consists of (in CHD format):
Art of Fighting 3
Breakers
Fatal Fury 3
Ironclad
King of Fighters '95, The
King of Fighters '96, The
King of Fighters '97, The
King of Fighters '98, The
King of Fighters '99, The
Last Blade 2, The
Last Blade, The
Magical Drop II
Metal Slug
Metal Slug 2
Neo Drift Out
Neo Turf Masters
Ninja Master's
Pleasure Goal
Ragnagard
Real Bout Fatal Fury
Real Bout Fatal Fury 2
Real Bout Fatal Fury Special
Robo Army
Samurai Shodown III
Samurai Shodown IV - Amakusa's Revenge
Savage Reign
Soccer Brawl
Super Sidekicks 3 - The Next Glory
Twinkle Star Sprites
Let me know if you need any of mine or if you encounter any difficulties.
If you want to see a simple example of the copy protection in action, just fire up Robo Army and let it run through the demo for three cycles...you'll then be greeted with this fun message in blue text on a black background:
"WARNING
THIS CD SOFTWARE IS A COPY AND CAN
NOT BE PLAYED FURTHER.
COPIED SNK SOFTWARE INFRINGES
SNK'S COPYRIGHTS AND TRADEMARKS.
WE RECOMMEND THAT YOU PURCHASE
ORIGINAL SNK SOFT WARE."