Lorenzo Fongaro wrote: > of the rom. I'd like to make an upgrade, > but I need to know wich kind of eprom I've > to use. The GS ROM01 is available on apple.cabi.net. You will need a 27C010 eprom (64k) and an adapter to fit the 32pin eprom into the 28pin mask rom socket. Atari users will remember these megabit adapters. They were required for TOS upgrades. Patrick