I just had a look at the install of ancient NetBSD I have running on my Pocket386, and the X server in there (which is XFree86 3.x) does have a generic VGA driv

I just had a look at the install of ancient NetBSD I have running on my Pocket386, and the X server in there (which is XFree86 3.x) does have a generic VGA driver that does 640x480 at 16 colors just fine. I'm not sure what the "default settings" would be in this context since X that old doesn't even start without a proper XF86Config.