The values the suite uses for VGA output are H=855 and V=526, pretty close to what marqs mentions.
Regarding PAR, it uses 10:11 for NTSC and 59:54 for PAL. However, when in 480p you can output either 1:1 or 10:11 depending on what you have selected. I guess I never updated the Dreamcast help t reflect that, sorry.
If you select the option that reads: “480p scaled 240p assets & scanlines”/”480p (scaled 240p)”
And if you select the option that reads: “480p mixed 480p/240p assets (1:1)”/”480p (Scaling disabled)”
You get: http://junkerhq.net/cps2/VGA-PAR.JPG
I need to update the suite anyway, withe the latest changes from the 16bit versions. So if you have suggestions let me know. I’ll make it so teh helkp reflects this changes, and those menu options are more clear (as the NTSC ones are: “480i scaled 240p assets (NTSC)”/”480i mixed 480p/240p assets (1:1/NTSC)”