This is not a MAME support site nor an emulation site, this is a site about building hardware systems to play arcade games on a computer. You can play hundreds if not thousands of games on arcade controls without ever once using an illegally gotten ROM or even MAME. Note - I am a fan of MAME, but MAME and arcadecontrols.com are
two completely different entities with different goals.
That said, there are a few options:
1. Get the freely released ROMs at mamedev.org - currently there are
12 listed.
2. Purchase a HotRod joystick or ArcadePC upright cabinet from
HanaHo, which come with fully licensed CapCom ROMs.
3. Buy any of the various PC compilations that have been released that have emulated or recreated versions of arcade classics.
4. Buy Dragon's Lair and other laser disc games from the legally licensed seller,
Digital Leisure, and play them with their engines or use Daphne.
5. Try the hundreds of shareware/freeware arcade remakes and originals available from places like retroremakes.com, Big Fish Games, Alwar Entertainment, retro64.com, and many others.
6. Search the software forum on this web site for games that people are legally playing on their arcade controls.
It used to be that the only thing that was a guarantee to irritate me was to attack my integrity, but I've found that the other thing is the "if you're building arcade controls you must be a pirate" line that keeps coming up.
--- saint