From: Hans-Bernhard Broeker Newsgroups: comp.os.msdos.djgpp Subject: Re: crazy animations Date: 28 Feb 2003 10:12:27 GMT Organization: Aachen University of Technology (RWTH) Lines: 31 Message-ID: References: <200302271912 DOT h1RJCW6f097171 AT mail DOT univ DOT kiev DOT ua> NNTP-Posting-Host: acp3bf.physik.rwth-aachen.de X-Trace: nets3.rz.RWTH-Aachen.DE 1046427147 9512 137.226.32.75 (28 Feb 2003 10:12:27 GMT) X-Complaints-To: abuse AT rwth-aachen DOT de NNTP-Posting-Date: 28 Feb 2003 10:12:27 GMT Originator: broeker@ To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com eugen androushchenko 
 wrote:

> 200 frames/per seconds on primary screen (LG Flatron 915+)
> 85 frames/per seconds on secondary screen 

That's awfully much, if those are "reasonbly sized" display modes (by
today's standards) we're talking about here.  200 fps at 1 megapixel
in truecolor is 600 MByte/s --- not counting the second display, or
anything the CPU might have to do besides just pumping pixels.  The
AGP interface and your card may be able to handle that load, but your
RAM quite probably won't.

Anyway: what could possibly be the use of driving that screen at 200
fps?  Even if you need a factor of 2 to support some 3D shutter
glasses, I'm quite sure that going anywhere beyond 80 Hz (160 Hz with
shutters) is just a waste of effort.

> As you can see I can work just in DOS32, but not in windowz, lunix,
> unix (no realtime core).

As a matter of fact, I *don't* see why going to DOS would necessarily
help you here.  For a start, you're likely to run into rather heavy
problems supporting two screens, let alone two separate graphics
cards, without any help from a driver layer more advanced than plain
old VBE, I think.  I don't think VBE ever even remotely supported more
than one display in parallel.


-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.