Date:	Thu, 1 Feb 2001 11:10:05 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	djgpp AT delorie DOT com
Subject:	Re: DJGPP timer slowdown
In-Reply-To:	<95a7as$aie$1@nnrp1.deja.com>
Message-ID:	<Pine.SUN.3.91.1010201110948.13803L-100000@is>
MIME-Version:	1.0
Reply-To:	djgpp AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

On Wed, 31 Jan 2001 dcasale AT my-deja DOT com wrote:

> First of all, I wrote a compression program using DJGPP to store all of
> the files and file information (including long filenames, file
> attributes, etc.) in one big file.  To access the file information not
> available through straight DOS -- since that's what I'm running under --
>  I use direct disk access (INT13h, AH=042h, as well as other disk
> access calls) to get at the info (for example, long filenames).

Int 13h, AH=42h is an EBIOS call.  AFAIK, EBIOS is part of the IDE
controller, not of the system BIOS.  As such, it is much less
standard, and might do all kinds of tricks that never show in normal
DOS/Windows operation, because AFAIK most programs don't call these
functions directly.

In other words, you are well advised to avoid using them.  (I don't
even understand why did you need to go to low-level disk I/O functions
instead of using normal file I/O.)

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