Order of the Butterfly
Posts: 333 from 2003/10/12
From: 1 AU, EU, DE/HU
FYI there is the same issue with MAME when using some ROMs (IIRC, DoDonPatchi has this issue).
Indeed, MAME has the same issue, it never handles the now required overlay line modulo setting, it just assumes that the modulo equals the window with times bit per pixel, which is not (always) true any more.
However, latest MorphOS MAME source doesn't seem to be available (it's not on Fab's site at least), so it's hard to provide a fixed build.