> I'm trying to login to Mametesters but it's not accepting my login so I'm putting the > issue here. > > In Galaga, the rom boots to upside down screen and gets stuck in what looks like a > service mode.
Does it happen each and every time? Are you using mamedev.org's binaries? 64 or 32 bit? Do you have -cheat enabled?
It is odd that the artwork would be flipped as well unless you have physically turned the display 180 degrees via the Video Options menu.