Not all everdrive flash carts support the mapper/rom size our demo uses (the SSF2 mapper with an 8MB rom). The included nfo file lists some supported flash carts.
I didn't know that. Thanks for info. I had set up a sweet broadcast CRT and Mega Drive with RGB, along with a 50/60Hz switch on it. Looking forward to enjoying demo on real hardware. I'm looking into Mega EverDrive X7.