Going back in time a bit here, but here are some nice links that describe the 1970s Magnavox Odyssey consoles 1 & 2. Those overlays for the games really take me back a few years. 
http://www.pong-story.com/odyssey.htm
http://www.cyberiapc.com/vgg/magnavox_odyssey.htm
http://www.pong-story.com/odyssey.htm
http://www.cyberiapc.com/vgg/magnavox_odyssey.htm
