We ran across this post recently and thought we would share it in case anyone has any more information about this. Can it be ported to a Papilio board?
RetroArch FPGA – cores are beginning to run!
Consider this project still in an experimental phase – but cores are already beginning to run! What you see is a FPGA devboard with RetroArch that is outputting a random libretro core to the screen.
It’s still far too premature to speculate on what this project will amount to ultimately, and what our future plans are for it, but we felt we ought to share with you this latest breakthrough in development since it has taken quite a while to get there!