My Boardgame Restaurant/Bar Queen & Rook got our hands on one of these machines for our new Arcade & I wondered if anyone has ever speedran the game on this hardware & if not maybe I could set up some sort of spectacle event for it

Well, I just tried the non-multitap setup on the dumped ROM from the NSS arcade on my SNES and can confirm it works, but I not sure if the NSS system works the same as the SNES. What I found is that it uses the same parts you find in the original SNES console (you can even replace it for repairs). Unfortunately can't find that arcade in Brazil to give a try, I hope you can validate a run there =P