This video shows how to configure your Raspberry Pi to run N64 games.
More details are here:
http://smartretro.co.uk/forums/viewtopic.php?f=3&t=22
See games running here:
http://www.dailymotion.com/video/x2hu3fo_retropie-raspberry-pi-rpi-1-vs-rpi-2-speed-n64_videogames