The Zgrass was built on the hardware of the Bally Arcade, the same system Dave Nutting Associates used to develop several Bally/Midway games.
Copper Giloth, Jane Veeder on Loving Change
Tom DeFanti spun the project out of the university with some of his former graduate students and with outside financial support from Dave Nutting Associates.
Copper Giloth, Jane Veeder on Loving Change