RE: dual head on 3dfx

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From: Phil Bridges (phil.bridges@acm.org)
Date: Tue 27 Jun 2000 - 22:50:07 IDT


two AGP, or one AGP and one PCI?

-----Original Message-----
From: owner-linux-svgalib@vger.rutgers.edu
[mailto:owner-linux-svgalib@vger.rutgers.edu]On Behalf Of daniel
sheltraw
Sent: Monday, June 26, 2000 4:55 PM
To: linux-svgalib@vger.rutgers.edu
Subject: dual head on 3dfx


Matan

I am purchasing a new desktop to run the two vc cards. Do you
think two 3dfx VOODOO 3 3000 AGP would work? I am going to make the purchase
today if you answer yes.

Thank you,
Daniel


>From: Matan Ziv-Av <matan@svgalib.org>
>Reply-To: Matan Ziv-Av <matan@svgalib.org>
>To: daniel sheltraw <l5gibson@hotmail.com>
>CC: linux-svgalib@vger.rutgers.edu
>Subject: Re: yet more on dual_headed svgalib support
>Date: Mon, 26 Jun 2000 23:34:24 +0300 (IDT)
>
>
> > Primarily I want to use the first display for standard input and
>display. I
> > want to use the second for display only. Do you see any problems with
>that?
>
>No, providing the program you use does not expect input. If it does
>expect input, and you run with the novccontrol option (necessary for
>secondary display), it might fail very early. I don't yet know exactly
>why, or what kind of input causes that.
>
> > Also in case I might want to use the second display for input as well
>would
> > you explain how the association between keyboard and display is made?
>That
> > is how is the first display associated with your normal
> > keyboard and the second display associated with the keyboard through
> > the PS2 port?
>
>The kernel does not know about the second keyboard. I run a user mode
>program I wrote that reads the keyboard (from /dev/psaux) and sends the
>keys to a vc of my choice. Then I run an svgalib program (that uses
>getch, not raw mode) on that vc with the novccontrol option, and the
>secondary display. Then I can switch away, and the program still runs,
>and gets its input from the second keyboard, while the main keyboard and
>display can use any other vc, including X, or other svgalib programs.
>
>
>--
>Matan Ziv-Av.                         matan@svgalib.org
>

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