This is an attempt to do a straw poll. For 2 years now I've been porting various cores to different boards, mostly Xilinx but some Altera, even making my own ZX spectrum FPGA core, using Opus Discovery disk drive, and Multiface 1 / 128. I think I've gathered most of the issues when doing a port with the different technologies, and would like to propose something.
The ZXUno is an easy board to get hold, but the parts seem more difficult, the ZXSpectrumNext is subject to more crowd funding, not to mention those that are sold 2nd hand go for mental prices, and the DE1 / Mister FPGA boards are also quite expensive, so I wanted to create a fairly universal daughtercard for any FPGA of around 10KLuts, and a set of cores where one could simply plug in, specify the pinouts, hit synthesis and away we go.
I would propose three posibilities:
a) a PCB with SMD components for the advanced solderer
b) a single side PCB with TH for the less advanced, but willing home PCBers
c) instructions to make the above using matrix board.
Build cost would be under 20 GBP, plus the FPGA board, which could be a cheaper Chinese board, QMTech are pretty awesome boards with standard connectors for under 50 GBP. Each board would have a set of GPIO pins, with separate power lines that could easily be adapted to any FPGA board.
Also the same card could connect to a RP2040 board such as a RPi Pico to do software emulation instead of FPGA if needed. I'm happy to share my cores, and designs under a open source licence (since most of what I stole was open source anyway
).I'm happy to potter away just enjoying my craft, but as a software engineer of 25 years, and a degree in computer systems engineering, I'm happy to share my endeavours, and have done previously, however, it didn't work on the recipient's FPGA due to a faulty CPU core - I've fixed it now and learned a heap since that previous share.
Also happy to share screen shots and photos of my various boards and designs - they are not pretty, but they work.
So would some people who would like to get FPGA retro cores running locally, but don't have surgeon's hands or salary? If I get sufficient yeses, then I'll set to work documenting and presenting.
Hoping for a positive response,
Microjack.
) - the only problem with this is that I sit on the sofa and the keyboards are about 7' away 
An ideal computer would have the option to add an external keyboard/mouse via USB or Bluetooth.
