It requires a computer to boot? I must have missed that part.That it requires a computer to boot
Have you looked at the Z80 Membership Card? I believe that uses a 32K EPROM and a 32K RAM chip. No boostrap there - although it also doesn't run CP/M.Looking around it appears almost every board out there uses UART to bootstrap. I found a Z280 board that didn't but still haven't found anything with a Z80 that doesn't require an expansion card to accomplish that. I would have thought this would be pretty standard.