Whitechapel Computer Works MG-1

Glen Slick glen.slick at gmail.com
Sun Nov 30 23:56:15 CST 2014

On Sun, Nov 30, 2014 at 9:36 PM, Sean Caron <scaron at umich.edu> wrote:
> Matrox QG-640... a third party video card for the Q-bus?! Neat. Will it
> drive a VGA display? I looked at the PDF of the manual and the specs sound
> similar. What does the bulkhead look like? Did it use a standard DEC
> keyboard and puck mouse with breakout cable like the VCB02? Do you have a
> complete system? It would be cool to see a picture if you could get them to
> drive a common VGA display. Curious to know more. Were there other third
> party vendors in the Q-bus video market?

If Matrox provided any sort of bulkhead panel for the QG-640 I don't
have one. The board only provides video out through 10-pin connectors
(the typical 2 row by 5) with R, G, B, and composite sync. No input of
any kind.

There are actually two separate video outputs, each with their own
INMOS IMSG170 RAMDAC fed from the common 8-bit display buffer. I
suppose you could get separate displays with some limitations if you
played interesting tricks with the color tables.

I need to try soldering up some 10 pin header to HD15 VGA connectors
and give the boards a try sometime.

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