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TWO GRAPHICS CARDS IN SAME MACHINE?

Quote
In article <55devi$oqs_...@salford.ac.uk> MCA...@news.salford.ac.uk (J.K.Burns) writes:
>From: MCA...@news.salford.ac.uk (J.K.Burns)
>Subject: TWO GRAPHICS CARDS IN SAME MACHINE?
>Date: Fri, 01 Nov 96 18:19:30 GMT
> Does anybody know/have experience of plugging two or more PCI (or ISA)
>graphics cards in a PC (or whatever) and getting them to work (each outputting
>to a different monitor).
> Would I need to write/get specialised driver software?
> Any info would be great.
> God Bless - Jamie.
>--
>Im running with Jesus Inside! (ding, ding, ding)

Usually that does not work since two VGA cards use the same video memory
locations and the same ports. I have heard of some cards that do support a
second card beside it though (some very expensive Matrox card I recall). Don't
count on it being possible. A hercules mono card togehter with a VGA card is
possible though. And there are cards that can give different output to two
monitors (1 card). These cards are very expensive though. Try checking on the
web for it (my best guess would be Matrox).

Mike.

 

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Hi,
For the whole history of hte PC people have been doing this, although it's
always been a nice activity.
If you want standard windows drivers for this, so that windows output
appears automaticaly on both screens, then I'm not aware of any solutions.

But if you want to do this for a custom application, in which output from
the 2nd monitor was created by your own software (you are sending this to a
programming newsgroup) then there are a few solutions.

You may be able to find an ATI Graphics Ultra Pro mach32 display card. They
are no longer made, but they are recent enough to still be around. They
contain a vga subsystem but it can be disabled. Basically, they look, to a
programmer, more like an ibm 8514 adapter. Use it with any standard vga.

Similarly, you may be able to find a #9GXi from Number Nine. I believe it
is obsolete, but it works just fine alongside a vga. It has an onboard vga,
which must be disabled when it is in the same box as vga adapter. To a
programmer, it is a TIGA adapter.

For current products, there is a company called ColorGraphics which makes a
dual vga adapter. They used to advertise in the back of the weekly trade
mags. Basically, a few lines of code switch the "active" adapter.

And there is a company called salient systems that makes boards that are
somewhat like the #9gxi which have a tiga programming interface.
http://www.salientsys.com/tiga0327.html

Hope this helps

-kc

J.K.Burns <MCA...@news.salford.ac.uk> wrote in article
<55devi$oqs_...@salford.ac.uk>...

Quote

>  Does anybody know/have experience of plugging two or more PCI (or ISA)
> graphics cards in a PC (or whatever) and getting them to work (each
outputting
> to a different monitor).

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote

> > Does anybody know/have experience of plugging two or more PCI (or ISA)
> >graphics cards in a PC (or whatever) and getting them to work (each
outputting
> >to a different monitor).

> > Would I need to write/get specialised driver software?

> > Any info would be great.

> > God Bless - Jamie.

> >--

> >Im running with Jesus Inside! (ding, ding, ding)

> Usually that does not work since two VGA cards use the same video memory
> locations and the same ports. I have heard of some cards that do support a
> second card beside it though (some very expensive Matrox card I recall).
Don't
> count on it being possible. A hercules mono card togehter with a VGA card is
> possible though. And there are cards that can give different output to two
> monitors (1 card). These cards are very expensive though. Try checking on
the
> web for it (my best guess would be Matrox).

> Mike.

I tried Hercules and VGA and didn't make it though there are cards that

support two screens (usually for debugging).

The problems start when moving to graphic mode.

                                           Arnon

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote
> > > Does anybody know/have experience of plugging two or more PCI (or
ISA)
> > >graphics cards in a PC (or whatever) and getting them to work (each
> outputting
> > >to a different monitor).

> > > Would I need to write/get specialised driver software?

I used a VGA and MDA (mono card) in the same PC for a long time without
any problems. Mostly the MDA was used as a place to send debugging
information. However, since most of my development is now under Windows
I've abandonded this in favour of using a window!

If one text/one graphics isn't suitable and you need two or more graphics
screens (like I will do in a forthcoming project) then you need a special
graphics card. ColourGraphic Communications seem to be the best for this.
Visit their web site at www.colorgfx.com or call them on 770-455-3921 (US)
or 01202-299048 (UK).

Hope that helps!

Regards,

Rafe

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote
MCA...@news.salford.ac.uk (J.K.Burns) wrote:

To my knowledge (which may not be complete) this is essentially not possible,
since they would attempt to share the same i/o ports for vidoe memory and
register access.  However....I have seen (in a catalog I do not currently have
at home) several boards that incorporate up to four SEPARATE SVGA 'adapters'
with independant outputs.  If you wish, Ican post appropriate references
when I can get them (tomorrow).
Quote

> Does anybody know/have experience of plugging two or more PCI (or ISA)
>graphics cards in a PC (or whatever) and getting them to work (each outputting
>to a different monitor).

> Would I need to write/get specialised driver software?

> Any info would be great.

> God Bless - Jamie.

>--

>Im running with Jesus Inside! (ding, ding, ding)

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote
MCA...@news.salford.ac.uk (J.K.Burns) wrote:

> Does anybody know/have experience of plugging two or more PCI (or ISA)
>graphics cards in a PC (or whatever) and getting them to work (each outputting
>to a different monitor).

Oops.  forgot this:  Industrial Computer Source  1-800-677-7329
                http://www.industry.net/indcompsrc
Quote

> Would I need to write/get specialised driver software?

> Any info would be great.

> God Bless - Jamie.

>--

>Im running with Jesus Inside! (ding, ding, ding)

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote
MCA...@news.salford.ac.uk (J.K.Burns) wrote:

> Does anybody know/have experience of plugging two or more PCI (or ISA)
>graphics cards in a PC (or whatever) and getting them to work (each outputting
>to a different monitor).

Okay, here we go:
  Industrial Computer Source Source-Book, 1197 edition 1

Model MVP-2x
  2 or 4 port SVGA controller
  Virtual montiro to 2048x1536
  Windows 3.1, Dos, os/2, windows NT drivers
  2X - dual db15pin connectors on back panel
  4X - cabled connection to 4 db15 connectors
  Up to four(4) MVP-4X cards may be installed in one system(!), allowing a 4 x 4
virtual monitor display (using 16 separate monitors)

  $2X is $1099.00 (US)   4X is $1999.00(US)

Quote
> Would I need to write/get specialised driver software?

> Any info would be great.

> God Bless - Jamie.

>--

>Im running with Jesus Inside! (ding, ding, ding)

Re:TWO GRAPHICS CARDS IN SAME MACHINE?


Quote
On Thu, 07 Nov 1996 03:29:18 GMT, hi...@ionet.net (Thomas Hill) wrote:
>MCA...@news.salford.ac.uk (J.K.Burns) wrote:

>> Does anybody know/have experience of plugging two or more PCI (or ISA)
>>graphics cards in a PC (or whatever) and getting them to work (each outputting
>>to a different monitor).

I'm using a special card now which contains two video cards.  It comes
with a Windows driver, so Windows stretches across two monitors (or
more).  The mouse magically jumps between them.

It's made by

http://www.colorgfx.com/

And is excellent.

The EZPresenter

http://www.ezshow.com/

is apparently similar.

Francis Irving
VEGA Group PLC.

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