Hello, On Fri, Nov 07, 2003 at 10:03:58PM +1000, Stuart Longland wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi All, > > I've recently acquired 3 Sun 13W3 monitors from my university (they > were throwing them out), and I was wondering if anyone has managed to > get these sort of monitors to work on either IBM PC or SGI hardware... > > The monitors in question: > > - - 1x Sun GDM-20D10 19" (which I'm told is very similar to the SGI 20D11) > - - 2x Sun GDM-1662B 16" (One didn't work at all, the other appears to > work, but won't sync properly.) > > As I say, apparently some of the Sun monitors just magically "work" > on > Silicon Graphics hardware, but it seems that these ones will need some > modifications. Anyone know of a document that explains this?
The Sun monitors have to support composite sync. There is also a problem that the SGI and Sun pins for composite sync are different in the 13W3 pinout. http://groups.google.com/groups?selm=pan.2002.04.05.09.17.51.750217.5379%40icequake.no_spam.net&oe=utf-8&output=gplain describes how I kludged Sun 13W3-VGA adapters to work on an Indy and Indigo2. You should be able to do something similar for the Sun monitors. Basically, smash pins 3 and 4 down next to pin 5 in the 13W3 connector, so that 3 and 4 are no longer connected to the SGI video output, and then blob some solder in there to connect pin 3 and 5 (I think pin 4 is irrelevant, just make sure it is disconnected from the SGI). What this will do is to take the composite sync which is coming out on pin 3 on the SGI, and put it onto pin 5 on the Sun connector which is where that signal would be expected. It also disables H/V sync which might confuse the setup. I don't know if this will work for other machines/monitors/adapters but it worked with a Sun 13W3->VGA adapter on my Indy XL and Indigo2 ZX. -- Ryan Underwood, <[EMAIL PROTECTED]>
