I got this working so far on my NVIDIA SHIELD Portable. SNES would only work for me with SNES9X core.
My question is, how do I get retroarch to load without the gamepad overlay? I tried disabling it in the menu, but it comes back every time I launch a game.
I would also want to know where I can put the filters so I can use something line the HQ4x or SuperSai.