Well it is one of the most obscure and weirdest game system ever released...yes released!
Here's a picture of the beast:
In the FAQ, i wrote that one day the Champion 2711 will be dumped and emulated...well it's been a couple of months now that it's been done. I sold a dead Champion 2711 to "plgDavid" and lent him all the cartridges so he can dump everything and he also made the driver for MAME (MESS is now part of MAME if you didn't know). Since MESS 0.167 (ahh damn..MAME!), now you can try out the Unisonic Champion 2711 and if you need the BIOS and the carts ROMS then you're in luck because they are now available in the "Archives" section and the file is "unichamp.zip" that you need to put in your MAME ROMS section.
You can check videos of each game PACs right here (or on my Youtube channel):
And now, "decle" from Atari Age forums is trying to convert/adapt all the games of the Unisonic champion 2711 to the Mattel Intellivision!! That is so great!
You can read all about it here: Li'l Bro - A Unisonic Champion Simulator for the INTV
and even download the PAC-01 conversion in ROM format for the JzIntv or other Intellivision emulators.
This i a great time that we live in now as many game consoles/systems are digitally preserved for historical purpose (and also to play...HEH!). =)