Editing Dreamcast AV Connector (section)

==== Usage Notes ====
The mode select pins are 6 and 7.  Ground either one for two kinds of 15kHz RGB (SCART), ground both for 31kHz RGB (VGA).  **Note** that the Dreamcast outputs VGA, the box or cable does not 'upscan', so Dreamcast VGA boxes cannot be used for converting low-res RGB to VGA on other consoles.

You should use a 220uF capacitor on each of the RGB lines (+ towards console).

<box round warning [[4]]0% |15kHz/31kHz RGB Note:> Most Dreamcast games are compatible with both 15kHz and 31kHz RGB modes (SCART and VGA) However a small percentage are not compatible and will show either a warning message on the Dreamcast's menu, or a blank screen. </box>

If a certain game will not boot in either RGB mode it can sometimes be 'forced' into RGB by fitting a break-before-make switch between ground and one, or both, mode select pins. Once this is done power up the Dreamcast with the switch in the 'standard mode' (Neither pin grounded) and flick the switch after the game disk has already started to be read (When loading original GD-ROM's you will hear a 'beep' sound from the drive at this point) this can often trick incompatible games into the desired mode.