I shudder to think of the responses and flames I might get to this question. I'd like to use old school controllers to play the non-Mame emulated games I have (NES, 2600, Sega Genesis, etc.) from my Mame cab. I found the site for hacking an NES controller into USB, but would rather purchase plug-in adapters for these controllers instead of ripping them apart and soldering.
Links appreciated.