NeoChips

Design files for NeoGeo replacement "chips".

Sometimes for sale on Tindie.

Or DIY:

1. Order standard 1.6mm FR4 boards or thinner, with soldermask on both sides. Specs are 6/6mil, min hole 3.5mm. Make sure that the fab is able to do castellated holes.
2. Order components from Digikey, Mouser, Farnell, LCSC...
3. Assemble following schematics
4. Use !

Disclaimer

See paragraphs 11 and 12 of the LICENSE file.

Thanks to GadgetUK164, Rom1 and pnauts for help and testing.