Is there a way to get ArcadeOS to utilize new resolutions? I'm running it on a PC connected to a standard VGA monitor (it's from a Solitaire cabinet). I found that when I run MAME directly, vertical games look best when run in the 300x240 resolution (I think that's the one). But ArcadeOS doesn't support this in it's list of available resolutions. And I don't want to change the Mame config file as I don't want this resolution used for horizontal games.
Any help appreciated. Apologies if this has been discussed before; this is my first time here.
Mario