On Wed, Feb 25, 2009 at 02:51:05PM +0000, Tony Houghton wrote:
I'm not sure whether C Scheeder is right, but it seems highly likely.
Christoph is right. The buyable cables operate the wrong direction for our purposes.
Different cards need diffeernt types of cable. For example ATI and Matrox cards can both output the necessary composite sync, but they need slightly diffeernt wiring. Most other cards can't output composite sync so you need a circuit to combine them.
with my cable described here:
http://www.vdr-portal.de/board/thread.php?postid=742945#post742945
you have a multi purpose solution because it does not take into account special features of some special graphics cards.
I never understood why people rely on things like on-chip composite sync. You easily can do that externally by two Rs and one T.
I successfully use the VGA2SCART cable above for nVidia, ATI Radeon and Intel graphics. Of course driver initializes separate sync for all three.
If you do go ahead and build a cable I'd recommend cutting one end off an existing VGA cable and using a multimeter to work out which wire is
that's how I do that. But take care to grab a cable with VGA Pin 9 wired. There are many cables out there with this pin not being connected.
Cheers Thomas