sega master system or genesis/mega drive drive

Anybody ever seen a windows or dos driver that supports sega master system or genesis/megadrive controller use on a pc or anybody have one if so private message me please.
Hmmm...looks interesting. Too bad it doesn't support XP - then I'd have a fully portable fully functional Sega laptop
Curtis, how about NTPAD XP? I haven't tried it (or even downloaded it) but it appears to use the same hardware interfaces and work with XP.