From:	Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Generate real-mode 386 DOS executables?
Date:	Mon, 06 Jan 2003 14:32:26 CST
Organization:	Rice University, Houston TX
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> My only use for HIMEM.SYS has been to load DOS into the HMA.  Does this
> capability (i.e., DOS=HIGH) have any advantage in protected mode, other
> than to free up some conventional memory below the 640K mark?

HIMEM.SYS handles weird chipset A20 configurations that CWSDPMI doesn't
talk to.  It allows modern disk caches and ramdisks to work (VDISK.SYS
does work with CWSDPMI without HIMEM).  It handles systems with memory
"holes" and memory bios calls which don't support the full physically
installed memory better (they are rare).  But there are no advantages
(and some memory/speed disadvantages) in using HIMEM only for Prot Mode
memory management.

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