I just got a couple of new Pi3's to do some bartop arcade cabs. A few years ago I built a few using mame4all with advmenu using PI version 1 256:
I got the bug again to build some more, so I got the new PIes, and have had no troubles setting up and playing recalbox. But when I attempted to use the sd card image from my older arcade cabs the Pi won't boot. I put the same card into one of the older Pies I had and i booted and went to the game menu fine. I thought The pi3 was backward compatible? Doesn't boot at all.
What do I do? (other than build something again from scratch) 3 years removed, mind is a blank slate. Thanks