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
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To: djgpp AT delorie DOT com
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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