GeneraLight wrote:maxtherabbit wrote:the DC doesn't support c-sync in 31kHz mode
I have a D24, which does not accept RGBHV. My Dreamcast isn't modded yet. I want to know how I can get the sharpest picture out of my Dreamcast with access to 240p/480i and 480p with a single cable.
maxtherabbit is correct in that the DC doesn't support composite sync with 31kHz output; however, you can get 480p RGBS output by using a BeharBros Toro. You need to toggle the switch between the SCART and VGA connectors (I believe it ships in RGBHV mode, so you need to toggle it for RGBS output); and then, looking at the bank of switches on the side, you need to toggle the far-right switch. I forget exactly which position is which, but, if it's not one, then it's the other.
If you don't want a BeharBros VGA box (which I understand; they add probably 8 or 9 inches to the depth of the Dreamcast), I think thefoo.83 sells a SCART cable with a mode switch that might give you 480p over SCART, but I haven't bought or tried one.
GeneraLight wrote:Dochartaigh wrote:You can look at RetroRGB's videos about the 68x card and the skew it gets on the top on the A-Series BVM's. Not quite as bad but it's definitely there on a BVM.
Yes. The Dreamcast suffers a similar skewed image as the Master System, but is a 31kHz console instead of a 15kHz console and thus cannot be fixed with VCR Mode on 480p.
http://retrorgb.com/bkm-68x.html
https://youtu.be/CneMJC-zTf8
https://youtu.be/SkslzaHJXzE
So, after watching both videos, I have a better understanding of what's happening to cause the skew, and it looks like it's possible to stabilize the sync signal with another video processor, but not all video processors seem to be capable of smoothing out the signal like the VCR mode on the D-series or the Extron 580xi. If the Dreamcast does cause this behavior on the A-Series BVMs, it makes me wonder if the sync combiner in the Toro makes a difference.