Connecting IBM GXT550P to SGI monitor.

[Edward Tomasz Napierala]

On 0702T0934, Jochen Kunz wrote:
> > Is there any way to connect 13W3 output of GXP550P (graphics card
> > in RS/6000 p43) to 13W3 SGI monitor (GDM-20E21)?  In order to connect
> > SPARCstation I had to make a little modification of the SS2 to make
> > it generate sync-on-green signal.  Will the same modification work
> > with IBM?
> Most likely not as the Sun generates C-Sync. The IBM machine generates
> either Sync on Green or separate H/V-Sync. Just try. Connect the
> RGB-leads and wait to get a picture. If you get one, the IBM does Sync
> on green and you are done. If not it does separate H/V-Sync. In that
> case you have to build a custom cable. Google for pinouts.

Yup, it does sync-on-green.  However, the picture is _very_ badly
distorted, and, what's strange, in several ways.  First, the palette
seems to be (it's hardly visible) messed up.  Second, there is
something wrong with synchronisation - vertical screen edges are
not vertical at all, they are 'torn' - but at least don't move, the
distortion is still.  However, if the monitor's OSD menu is on the
screen, it 'jumps' up and down two milimeters every half a second,
probably due to yet another problem with synchronisation.

Is the card toast?  From the diagnostic software point of view
(diag under AIX) it's ok.  I don't think that software checks the
analog part ;-)

-- 
If you cut off my head, what would I say?  Me and my head, or me and my body?