From: "Florian X" <dos DOT fire AT aon DOT at>
Newsgroups: comp.os.msdos.djgpp
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Subject: Re: far pointers
Date: Mon, 12 Jun 2000 13:51:12 +0200
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com


>> AFAIK, this is not true.  If you boot DOS without himem.sys or other
>> memory manager, then run a DJGPP program using cwsdpmi, you can do
>> disk I/O and everything else without ever entering V86 mode.  You just
>> go backa and forth between protected and real modes.
>
>You're wrong.
>1. HIMEM.SYS has nothing about V86. It just allows to access extended ram
>(above 1MB mark).
>2. CWSDPMI as a DOS extender (DPMI host or whatever you like to call it)
>passes all the called DOS functions from PMode program to V86 task in order
>to be handled by BIOS, IO.SYS, MSDOS.SYS, etc. None of good DOS extenders
>switches back to real mode in order to service BIOS or DOS function.
>


Dr-DOS's  emm386 driver uses ONLY the V86 mode! And so it also support
multitasking...

Bye, Florian