On Sat, 2003-11-15 at 18:24, Alastair Robinson wrote: > Hi, > > On Saturday 15 November 2003 8:39 pm, m0j0.j0j0 wrote: > > > I just purchased a GeForce4 TV-out card to replace my scan converter and > > hopefully get these guns working. > > I still don't think you're going to be able to get this working. The gun > needs to count the sync pulses used to generate the picture - and most TV-Out > chipsets receive lines from the computer at twice the rate they show them on > the TV screen, so the TV-Out and VGA ports aren't properly in sync. Add to > that the fact that some TV-Out capable cards actually have totally separate > DACs for VGA and TV-Out, and you should be able to see the problem! > > I presume you're connecting the gun to the VGA port, and pointing it at the TV > Screen. The only way to get this going would be to build some kind of > circuit to extract the sync pulses from the actual video signal going to the > TV, instead of the VGA signal. > > Note that I haven't tried this, but I reckon you'd need something like an > LM1881 IC. > > All the best,
The gun is actually connected to the S-Video out of the GeForce4. There is a S-vid cable that then goes to the TV from the gun. It turns out this order is important, which I didn't expect. If you go TV out->S-Vid cable->gun->TV, you get a nice scrolling picture. The VGA port on the GF4 is not being used. It *almost* works. I have stable picture and it registers the shots in the general vicinity (but not good enough) of where I'm aiming. I'll try some other games and dig into this more over the next couple of days. Joe _______________________________________________ Xmame mailing list [EMAIL PROTECTED] http://toybox.twisted.org.uk/mailman/listinfo/xmame
