Tried this yesterday and it just resulted in RetroArch crashing for both parties. I’m guessing this just isn’t supported (in the sense that the netplay just isn’t set up in a way that can handle mednafen-psx out of the box)? If not, is there any plan to support this?
Mednafen PSX does not support savestates atm, and even if it did, it would likely be too slow for use with netplay with rollback.