Dreamcast

The Sega Dreamcast is a video game console released in November 1998 in Japan and in late 1999 in other territories. The machine was Sega's last home console, it enjoyed modest commercial success and has a large library of games. When integrating a Dreamcast into your gaming setup, the most notable feature of the console is its unusual range of video output capabilities. Various Dreamcast titles can be output in 240p/15khz, 480i/15khz and/or 640x480p VGA/31khz. Not all titles support all screen modes and to get the most out of your Dreamcast library you may need to either cable swap or build a modified VGA box.

Universal RGB VGA Box

To play games in VGA on the Dreamcast, it is necessary to buy a VGA box or VGA cable specially designed for the console. When using this accessory, normally 15khz RGB is locked out, probably to prevent consumer confusion as very few display devices support 15khz RGB via a D-Sub 15 (VGA) connector. In the case of the XRGB3 and (probably) the XRGB Mini too, it is possible to use both 15khz and 31khz through the same cable. By means of a simple hardware modification, most VGA boxes for the Dreamcast can be modified to output both 15khz and 31khz. For more information, see this link.

XRGB-3 Specific settings

With the universal VGA box modification, you can connect the Dreamcast directly to the D in 2 port on the back of the XRGB3. The XRGB3 will then process all incoming signals, allowing you to play all games in RGB with no cable swapping.

XRGB-Mini Specific settings

It should be possible to connect the Dreamcast's VGA output to the XRGB Mini via some sort of sync combiner. If you have the universal VGA box modification too, that would mean you could play both 15khz and 31khz RGB games, just as with the XRGB3. You could use the ArcadeForge UMSA for instance (please note I have not tested this myself, once tested can somebody confirm compatibility here?).