I'm a MAME newbie, so I have no idea how this works. I have MAME 0.88 installed using Mamewah as the front end, with a Betson Multisync 27" monitor hooked up to an ArcadeVGA video card. MAME seems to automagically pick the right resolution for me. Is this because I'm lucky, or just blissfully ignorant that I'm not really using the correct resolution?
I don't understand how MAME can magically pick the correct low resolutions for me. If it did this, and you were running a normal computer monitor, I assume that trying to run 256x240 would be bad. How does MAME know it's ok to run at that low of a resolution, and how does it know which resolution to use?