The arcade resolution is 384x224 and there is no SVGA equivilent. For compatibilities sake, the default resolution is 320x200 which is severely clipped. To change the resolution you must use the '-res x y' command line option (or just edit callus.ini). The best resolution is 400x300 (-res 400 300), although not all cards natively support that res (which is why you should get SDD). Other resolutions to try are 512x384, 640x480 and up. There's also tweaked res's 384x257 and 384x224 which may not work on all monitors/vidcards. These video modes are planar and are a lot slower than a regular VESA mode.