PC versionNESWIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Super Mario Bros. 2 apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here are the 2 projects we know about:
Super Mario Bros. 2, discombobulated
Famicom Disk System static recompilation (nesrecomp cycle backend)