Sync on Green RGB video
billdegnan at gmail.com
Sat Nov 18 17:44:07 CST 2017
On Nov 18, 2017 4:09 PM, "Douglas Taylor via cctech" <cctech at classiccmp.org>
> I have a couple of vaxes that output 'unique' video, Alpha 3000 300,
Alpha 3000 400, Vax 4000 VLC, and Vax Station 3100 M76.
> The Alpha and VLC each have a 3W3 type of connector and the 3100 has a 15
pin DEC designed connector.
> What does it take to connect these to inexpensive, modern VGA light
I have played around with that problem. If you have a converter to get
into a VGA port a newer high-end vga display will be able to adjust, but
not a cheap one. Because I use my vice vga/digital display for mode stuff,
I use a huge SGI color display for all of my 3w3 outputting systems and I
just switch the cable around. If you could imagine 5 or 6 systems
clustered around the one display.
I am sure someone here has a technical explanation, but in a nutshell the
3W3 world signal isn't the same as a standard vga and cheap vga displays
can't handle the refresh rate. Someone will prob. refine my answer but
that's why you can't just stick an adapter on there.
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