Oh cool, thanks for a detailed explanation @Trebor...
Unfortunately for some of my purposes outside emulators won't be able to work. I'll see what I can do to get A7800 working, but BupSystem is Windows only and won't be able to run on either the RetroPie, nor my Linux desktops...
I originally was wondering if the timing could be due to one of the many board revisions floating around, and the emulator was matched to a specific one, but if ProSystem has clear differences on its own that's a different story.
I do know my Choplifter cart plays differently on one of my 2 actual consoles (it's the only cart that does), which is partially why I brought all this up to begin with.
🙂
Noticing these differences I have thoughts on that too... Haha