This guide will help you to install a Nintendo Entertainment System (NES) emulator. It should be noted that it is illegal to download roms that you do not own.
Issue the following command in your terminal.
$ sudo apt-get install fceu
You have successfully installed a Nintendo emulator. To play one of your legally obtained roms, issue the following command
$ fceu /path/to/your/legally/obtained/rom.smc
Check out this link for somw info on using FCE Ultra
http://fceultra.sourceforge.net/docs.php#using

Here is a link to the FCE Ultra web site
http://fceultra.sourceforge.net/

This guide will help you to install a Super Nintendo Entertainment System (SNES) emulator. It should be noted that it is illegal to download roms that you do not own.
Issue the following command in your terminal.
$ sudo apt-get install snes9x
You have successfully installed a Super Nintendo emulator. To play one of your legally obtained roms, issue the following command
$ snes9x /path/to/your/legally/obtained/rom.smc
Check out this link for some options that you may add to the command
http://www.snes9x.com/phpbb2/viewtopic.php?t=3020

Here is a link to the Snes9x web site
http://www.snes9x.com/