X-Authentication-Warning:	delorie.com: mail set sender to djgpp-bounces using -f
From:	"Roland Zitzke" <NZEONTQYRAHL AT spammotel DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Obtaining the physical address of a pointer using PMODE
Date:	Tue, 15 Nov 2005 12:16:27 +0100
Lines:	14
X-Priority:	3
X-MSMail-Priority:	Normal
X-Newsreader:	Microsoft Outlook Express 6.00.2900.2670
X-RFC2646:	Format=Flowed; Original
X-MimeOLE:	Produced By Microsoft MimeOLE V6.00.2900.2670
NNTP-Posting-Host:	fw.telos.de
Message-ID:	<4379c36c_2@news.ecore.net>
X-Trace:	news.ecore.net 1132053356 fw.telos.de (15 Nov 2005 12:15:56 +0100)
X-Complaints-To:	abuse AT ecore DOT net
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi,
I read somewhere, that the pmode/dj extender has a fixed mapping of pointers 
to physical memory.
Thus, if I write something like
unsigned char* p = malloc(1024);
how can I obtain the physical location of the data pointed to by p, provided 
that I use pmode?
Background is that I need this to allocate a DMA buffer and I do not 
necessarily need virtual memory in my application.

Thanks and regards
Roland

- Raw text -