From:	Mike Darrett <ez073236 AT mailbox DOT ucdavis DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	question about bios/msdos speed
Date:	Tue, 23 Sep 1997 19:51:31 -0700
Organization:	University of California, Davis
Lines:	15
Message-ID:	<Pine.GSO.3.95.970923194832.22979A-100000@dogbert.ucdavis.edu>
NNTP-Posting-Host:	dogbert.ucdavis.edu
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi,

	I need to write a program that has *frequent* disk access, i.e. it
reads pieces of a MASSIVE data file, using fseek() to get to the regions 
it needs. The question is, since I am assuming the msdos file io commands
are in real mode, does this pose a problem to djgpp's 32-bit protected
mode, i.e. will the cpu be switching back & forth bet. real/protected
mode? This is slow, correct? Will using PMode instead of CWSDPMI be any
help?

	Thanks in advance,

		- Mike

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