It seems like everyone and their mother is working on a different types of JAMMA solutions for the MiSTer project, and I am too :)
I haven't settled 100% on a name yet, but for now the working title is simply "JAMMA Expander", as it expands the DE10-nano to work in a JAMMA cabinet. It doesn't have a zillion features, but aims to make running MiSTer in a cabinet as easy and clean as possible. If you want a really good "multi-pcb" for use in a cabinet, but don't feel like a taking on a project - this may be the board for you.
This board uses the HDMI output of the MISTer, so both video and audio will be as good as it can get.
- 24 bit color, coupled with a high quality DAC and RGB amplification.
- It has a decent audio amplifier for MONO audio, but you can also toggle a switch to get line level stereo via RCA if you have a stereo amplifier in your cab.
- Hassle-free firmware updates via micro-SD, very much the same way as the Jammafier and the JVS-PAC 2
- an OLED for diagnostics
You mount the DE10 on top of this board, not under - so fitting it in a cab should be very simple, and it's also easy to remove the DE10 should you want to use it for something else.
Availability should be sometime this summer ;), price is TBD.