For those interested in hacking in this:
The Pano G2 FPGA is a monster, but prices on eBay have gone up a lot. My cheapest buy was 25 of them for $85 (including shipping!). They now go for around 1 for $30 if you’re lucky... or $200+ for many.
The Pano G1 (with VGA instead of DVI) is cheaper but has a much smaller FPGA, though still large by hobby standards.
The benefit of the G1 is that all interfaces are working now, including DRAM, USB, Ethernet.
Last week, Skip Hansen got a full CP/M system running on one: https://github.com/skiphansen/pano_z80
USB on the G2 is hard. A bunch of people have tried and failed.
I never was a fan of the Zilog Z80 (its instruction set reminded me too much of the idiotic intel 80x86 family), but seeing someone running the Control Program for Microcomputers on a whopping 25 MHz Z80 is incredibly cool... just imagine what kind of scene demos could be coded on this monster for the next demo party...
I wonder if it would be possible to retrofit an MMU onto a Z80 design and port a real UNIX to it? 25 or even 50 or even a 75 MHz UNIX server on a Z80 processor, that'd be a nice perversion...