Thanks a lot, this is really useful! So there seems to be a whole series of arcade boards called PandoraBox and similar, available on all sorts of places. This page made a rather comprehensive list of the most famous ones. Mine seems to be a variation, as I can’t exactly locate the same board design, but definitely they have one named S812-004. Although they list it with 1080p output (mine seems to be 720p), and seems to store everything in the SD, while mine seems to have an internal memory somewhere.

https://electroarcade.com.au/pandoras-box-versions-buying-guide-what-to-look-for

Yup! I did backup the SD. But the database looks very much to be running from the mainboard storage. Thanks a lot for all the information, this was really useful! Time to have some good read.

Agh…Seems I reached some limit to upload pics? Let me see…here’s the A9 close-up picture I was mentioning:

Any idea on what this CPU is? Or the motherboard…Not sure how much or how easily can I tamper with it.

I guess he found out rather quickly how he can’t publish stuff overriding other people’s NDAs… It seems to be all deleted, now.

Is it possible to make it to only activate when plugged in?