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Mail Archives: djgpp/1996/03/28/03:38:59

Message-Id: <MAILQUEUE-101.960328092713.352@merlin.e-technik.uni-erlangen.de>
From: "Michael Schuster" <SCHUSTER AT merlin DOT e-technik DOT uni-erlangen DOT de>
Organization: LS f. Elektrische Energieversorgung
To: djgpp AT delorie DOT com
Date: Thu, 28 Mar 1996 09:27:13 MET
Subject: Re: Learning to use DPMI?

Gruess Euch!

Gregory wrote:
> ... DPMI with DJGPP.  I'm also on the beginning of the DJGPP 
> learning curve.

Me, too.

> The application I'm working on has a timer interrupt occuring every 
> millisecond.  It occurs in real mode, however when it triggers I need 
> to collect data from many A/D channels.  This can quickly consume a 
> large amount of memory, hence the need for protected mode operation to 
> store the data somewhere...

I got a similar problem: I want to collect 'only' 12 A/D Channels, 
and do some calulations, but with a frequency of 36kHz. So does 
anyone think, that is possible somehow with 

 1. 166 MHz Pentium and 
 2. the fastest RAM I can get out there,
 3. programmed with GNU-C

I wrote some math tests to evaluate the speed of a 133 MHz Pentium 
and it was not so bad - but without an external interrupt or stuff 
like this.

So I also have ...
> Two questions:  
>    1) What is the best way and/or place to learn this?  Are there
>       any materials on the net I can look at to learn more?
> 
>    2) Does anyone have any suggestions on how to best handle the
>       application I described?
> 
> I freely admit I'm totally green on this subject.  Thanks in advance.

Michi 
'When I'm away she never leaves the house' (Weezer)

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Dipl.-Ing                                     * * *   * * *   *     *
Michael Schuster                              *       *       *     * 
Lehrstuhl fuer                                 * * *   * * *    *   *
Elektrische Energieversorgung                 *       *         * *
Friedrich Alexander Universitaet Erlangen     * * *   * * *      *
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