RGB -> VGA adaptors (was: Re: Tek 4317) - test-drb@ccmp.vtda.org

26 Feb 2013

Some searching on the Color Computer site leads to this:

http://miba51.com/CoCo_VGA_Adpater.html

Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA.
At one point, another was available from Chris Hawks

http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638

I have no experience with either, nor any connection except being a 
fellow CoCo user.

Hope this helps.

At 16:39 -0600 2/26/13, <Sander> wrote:
...
 Message: 12
Date: Tue, 26 Feb 2013 13:29:38 -0700
From: Richard <legalize at xmission.com>
To: cctalk <cctalk at classiccmp.org>
Subject: Re: Tek 4317
Message-ID: <E1UAR9e-0000zT-PL at shell.xmission.com>

In article <201302260715.r1Q7FiJL027219 at ls-al.eu>,
     Sander Reiche <reiche at ls-al.eu> writes:

   Richard <legalize at xmission.com> wrote:

 I have other Tektronix hardware from this time frame and the video
 output tends to be standard RGB (possibly synch-on-green) BNC
 connectors. 
  I'm still pursuing this, but it's taking its time.

 Are there any good converters for RGB? Like to VGA? 
Based on this picture, it appears that it would have RGB BNC connectors.
<http://user.xmission.com/~legalize/tmp/vintage/tektronix/xd88/20120417_130408.jpg>

That implies synch-on-green video signalling.  If you don't have a
synch-on-green RGB monitor, then you'll need an adapter to convert
that to VGA (which splits the synch signals out on a separate pin).
These shouldn't be too hard to find because synch-on-green was fairly
common.
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