Message-ID:	<3821E566.15FB@radar.mcgill.ca>
From:	Frederic Cazenave <cazenave AT radar DOT mcgill DOT ca>
Organization:	IRD (ex ORSTOM)
X-Mailer:	Mozilla 3.0 (X11; I; IRIX64 6.1 IP26)
MIME-Version:	1.0
Newsgroups:	comp.os.msdos.djgpp
Subject:	DPMI memory allocation
Lines:	37
Date:	Thu, 04 Nov 1999 19:57:46 GMT
NNTP-Posting-Host:	132.206.246.96
X-Complaints-To:	abuse AT mcgill DOT ca
X-Trace:	carnaval.risq.qc.ca 941745466 132.206.246.96 (Thu, 04 Nov 1999 14:57:46 EST)
NNTP-Posting-Date:	Thu, 04 Nov 1999 14:57:46 EST
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi,

I have written an application which allocates all
the free pages of my memory to make a very large
ring buffer. This buffer is filled when I receive
an interrupt from an acquisition board. The main 
program reads the buffer and displays the data on
the screen using allegro lib. Everything works
fine until I ask to save data. Then I open a file
in binary, and each time a "Save_Buffer" is near
to be full I write it on the file. This write 
operation crashes my machine most of the time.
If it works one time, I can ask to repeat the
operation without problem. 
The system works if instead of allocating all the
free pages of the system I only allocate 50 kb.
Even if I try with half of the free pages the system
crashes.

What's wrong ?????

Thanks in advance
Could you send me your answer by email too.

Fred
-- 
 _________________________________________________________
|                                                          |
|               Frederic CAZENAVE                          |
|    _/\_  /^=  McGill Radar                               |
| \_/    \//    Box 198, MacDonald College                 |
|   | /-\ |     Ste Anne de Bellevue                       |
|   ||   ||     Quebec, Canada   H9X 3V9                   |
|               Tel (514) 398 7733 fax (514) 398 7755      |
|               mailto:Frederic DOT Cazenave AT hmg DOT inpg DOT fr       |
|               http://www.mpl.orstom.fr/hydrologie/catch/ |
|__________________________________________________________|

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