A Sega consumer game system is up and running in Dave Wiebensons lab.
We have three cartridges : HANG-ON / SAFARI HUNT, WORLD GRAND PRIX and
FANTASY ZONE. The carts use two 27512 proms (and a 13 input nand gate IC 
and a PAL).
This system also uses plastic 'memory cards' for smaller programs. There is 
a slot in the front of the console to slide the card in.

There are two standard Joystick controls (rather like the Nintendo FC 
controls but with the option of a screw-in half inch shaft) and also a 
"light phasor gun" (again, rather like the Nintendo NES system).

A warning on the box and console indicates "Not FCC approved, Not for sale."

Check it out.