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Date:      Fri, 18 May 2001 09:23:19 -0400
From:      Jason Andresen <jandrese@mitre.org>
To:        Darrin Smart <darrin@suresoftware.com>
Cc:        freebsd-multimedia@freebsd.org
Subject:   Re: Direct access to VGA card
Message-ID:  <3B052247.6E0D3FE2@mitre.org>
References:  <3B045947.49DDF26C@suresoftware.com>

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Darrin Smart wrote:
> 
> Hi All,
> 
> I have a rather specialised application that wants to talk directly to
> the video card.
> 
> Can anyone point me to some documentation on how to take control of the
> console and switch to a non-text mode, in a similar way to XFree86?
> 
> Is it possible to hook into the card's vertical retrace interrupt
> without writing a driver?

Can you use the vgl(3) driver?  It's not very portable, and it's fairly
low level, but it would probably do what you want.  The only caveat
I have is that I've had problems with VGL appls locking up my terminal
before (view!), but that may be a fluke with the specialized machines
I was working on.


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