There's an NES emulator. Just find a rom and you can play the game. But I found that pirated roms are slow.
If you mean Super Mario Bros., then go to http://vimm.net and find the rom under the NES section. The same goes for Donkey Kong, if that's the game that you're referring to.
Here is a website link to download the first mario game.It requires dos which would be fine if your a windows users.
g3.acid-play.com
Check out all the Super Mario games on Acid-Play:
www.acid-play.com
g3.acid-play.com
Check out all the Super Mario games on Acid-Play:
www.acid-play.com