Hi all, thanks for all of your previous help. I’m now happy to report Groovymame is up and running! Key learnings were setting my PVM as the primary monitor in Windows, hiding resolutions the monitor can't display, and running everything through an Extron Rxi 203 for sync.
I’m having some difficulty, though, getting Midway titles to display correctly—all I see is a jumbled mess. I’ve read through the previous fixes of changing the refresh range to start at 55 vs. 49.50 but I’d like to keep the lower range for PAL content I have in RetroArch.
I’m currently using the super resolution modelines from RetroArch:
https://github.com/libretro/RetroArch/blob/master/README.md.
Any ideas on what to try? Thanks!