[ILUG] DEC -> VGA connector..

[Gavin McCullagh]

I did some research on going the other way.  We've a couple of nice 19" DEC
monitors with RGB connectors and wanted to use them with our normal vga
adaptors. 

First up, are there 3 or 5 connectors, ie is it R,G & B or R, G, B, Black
and White Connections.  If it's three plugs, your monitor will need to
understand sync-on-green or you'll need a converter.  Googling for
sync-on-green will give you circuit diagrmas for such a thing.  Basically
the sync info goes normally on the black/white connectors, but is embedded
in the green signal by some interesting use of Logic gates etc in the case
of the RGB only.

I've found a number of people who would sell me a RGB->VGA converter
(google) and the other way also, but they are expensive (>£100).  You can build
them yourself quite reasonably, but I don't know how good the quality would
be.  You could always go to Galway and get Ken's friends DEC monitors
either!

Gavin


On Tue, 27 Nov 2001, Dave Airlie wrote:

> 
> I'm looking for a Digital part that is as scarce as the earth but I know
> exists somewhere it connects VGA to BNC connectors for using a Digital VAX
> or DEC station with a standard VGA monitor... and knowing how many people
> have fallen through DEC/CompaQ I thought someone mighe be sitting on one
> without knowing..
> 
> it bascially looks like 15 pin connector going to BNC leads going to VGA
> connector... or may 3 pin connector going to BNC leads going to VGA
> connector..
> 
> If someone has one I'd love to see if it works and pay cash.. I found two
> references on the net but no-one seems to be selling one quickly..
>