Dec VR320 monitor

From: Mzthompson_at_aol.com <(Mzthompson_at_aol.com)>
Date: Fri Jan 10 09:13:00 2003

On Thu, 9 Jan 2003; "Lawrence Walker" <lgwalker_at_mts.net> wrote:

> I have a DEC VR320 monitor which I have never been
> able to get to work on a PC and don't want to spring
> for an expensive video card that would sync to it.
>
> I also have a Dec Rainbow 100+ with a color card that
> I use with a VR241-A monitor, and a DEC Pro 150.
>
> It occurred to me that the RB or the Pro 150 (in mono)
> might work with the VR320. I don't want to chance
> blowing something or causing the magic smoke to
> escape tho.
>
> Does anyone have any info on this ?

Here is some info from the manual (EK-VR320-IN-001):

                Resolution Frequencies
Model Horiz Vert Horiz - Khz Vert - Hz
-------- ------ ---- ----------- ---------
VR320-CA 1280 x 1024 70.66 66.47 *
VR320-DA 1280 x 1024 77.13 72.56 *

* The VR320 manual states that the monitor can operate at either 66 or 72 Hz,
and is preset to match the machine prior to shipping. The manual also says to
contact DEC Customer Service (yeah, right) if a change is needed. If DEC
set it to 66 Hz they stamped 'CA' after 'VR320-' on the ID tag, if set to
72 Hz they stamped 'DA'. DEC set it to 66 or 72 Hz using a slide switch
that is inside the monitor. The switch is clearly marked 66 & 72 Hz, just
set it to the desired position.

Here is the details in case you decide to pop for the video card.

                      VR320-CA VRT320-DA
 
Pixel Clock: 119.84 Mhz 130.81 Mhz
Pixel Period: 8.34 ns 7.64 ns

Horizonital Pixels

Horiz Freq: 70.66 Khz 77.13 Khz
Horizontal Period: 14.15 us 1696 12.97 us
Active Video: 10.68 us 1280 9.79 us
Blanking Interval: 3.47 us 416 3.18 us
Front Porch: 267 ns 32 245 ns
Sync Pulse: 1340 ns 160 1220 ns
Back Porch: 1870 ns 224 171 ns

Vertical Lines

Vert Freq: 66.47 Hz 72.56 Hz
Vertical Period: 15.035 ms 1063 13.7824 ms
Active Video: 14.49 ms 1024 13.28 ms
Blanking Interval: 552 us 39 506 us
Front Porch: 42.46 us 3 38.89 us
Sync Pulse: 42.46 us 3 38.89 us
Back Porch: 467 us 33 427.9 us

I don't know the outputs of the RB or the 150, so can't say it will
work or not.

By the way, the VR320 will work with some display cards used in the
DECstation 5000.

I do have a spare copy of the VR320 manual and you can have it if you
want it. Send me a private email with your mailing address.

Hope this helps,
Mike Thompson
Received on Fri Jan 10 2003 - 09:13:00 GMT