Message-ID:	<3420BBED.23F69891@juno.com>
Date:	Wed, 17 Sep 1997 22:28:14 -0700
From:	Ben Shadwick <bshadwick AT juno DOT com>
MIME-Version:	1.0
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP, interprocess communication, and DPMI
References:	<341FEC5F DOT 77F2 AT EnchantedLearning DOT com>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Mitchell Spector wrote:

> To do this right, some variables would need to be shared by the
> two programs.  Is there some way of telling DPMI to map a portion
> of each process's virtual memory space to the same physical memory?
> Or does a DOS box just not have this capability, since it's running
> in a Windows 95 virtual machine?  (From the experimentation I've
> done, Windows 95 seems to be careful to isolate processes in different
> DOS boxes from one another, so that they don't share video screens,
> for example.  So you don't seem to be able to pick an absolute

Not to nitpick or anything, but from what I've seen, that isn't entirely
true - I can't run a DOS program that uses the same SVGA mode as Win95 and
then flip out of it (either to Win95 or to another running program)
without Win95 destroying the program ("This application cannot be restored
and will be terminated") because it doesn't save the video memory or
something...

Good question though...

--
Ben Shadwick, Sysop, Mars Base BBS, (360)882-0773, Vancouver, WA, USA
email: bshadwickATjunoDOTcom (anti-spam =)
WWW: http://www.geocities.com/SiliconValley/Pines/7376/

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