Re: AXP 400 4/233 screen resolution

From: Dr. Tom Blinn, 603-881-0646 <tpb_at_zk3.dec.com>
Date: Fri, 31 Mar 95 08:37:47 -0500

> I recently got a new DEC AlphaStation 400 4/233 (great isn't it?)
> running OSF/1 version 3.2. We allready had a DEC station AXP 3600
> (old terminology) running OSF/1 version 2. Both have a 21" colour
> monitor.
>
> I noticed that the screen resolution of the new station (400 4/233) is
> lower compared to the old station (3600).
>
> Is this normal? Is there something to do about it or should I simply
> live with it?
>
> Thanks to everybody (even for simply wishing me a good day),

Have a good day, even if what I describe isn't the problem :^)

The older DEC 3000 Model 600 probably has an "HX+" graphics card, which only
supports a limited number of resolutions and scan rates -- 1280 x 1024 at
60Hz and 72Hz, most likely.

The newer AlphaStation 400 4/233 probably has a "TGA" graphics card, which
is also called a ZLXp. This graphics card can be set for any of a number of
graphics resolutions. Your new 21" monitor probably autoadjusts to match
the graphics card. I wouldn't be surprised if your graphics card is set for
1024 x 768 resolution instead of 1280 x 1024.

You probably got documentation for the graphics card with the system; it so
it has a table with diagrams that explain how to set the dip switches on the
graphics card for different resolutions. If you don't have documentation I
can probably explain it in words, but the pictures and tables are best.

If you set the graphics card for 1280 x 1024 and power cycle the system (the
switches are only read at power up), your monitor will probably start to
work in 1280 x 1024 just fine.

I've done this on systems with the "TGA" card and the 16" VRC16 monitor; the
graphics cards seem to come set for 1024 x 768 as the default.

Tom
 
 Dr. Thomas P. Blinn, UNIX Software Group, Digital Equipment Corporation
  110 Spit Brook Road, MS ZKO3-2/U20 Nashua, New Hampshire 03062-2698
   Technology Partnership Engineering Phone: (603) 881-0646
    Internet: tpb_at_zk3.dec.com Digital's Easynet: alpha::tpb

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Received on Fri Mar 31 1995 - 08:40:17 NZST

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