PC version Fans have made a PC version. Some are still early, so read the project page first.
Fans took Street Fighter Alpha 2 apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
Moved to tmcleroy/cps2recomp (CPS-2 Recomp). Unofficial native PC port of Street Fighter Alpha 2 (CPS-2 arcade) via static recompilation, with a training mode.