From:	Damian Yerrick <DONT DOT YOU DOT DAREd_yerrick AT hotmail DOT comSEND DOT SPAM>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: real mode & protected mode
Organization:	Pin Eight Software http://pineight.8m.com/
Message-ID:	<ofh5bs47eq4joo7a41k73pifutvf7c9172@4ax.com>
References:	<Pine DOT LNX DOT 4 DOT 10 DOT 10002222042070 DOT 939-100000 AT darkstar DOT grendel DOT net>
X-Newsreader:	Forte Agent 1.7/32.534
MIME-Version:	1.0
Lines:	51
X-Trace:	+4MVL9b2+1T+D6CUg3AJJII2B62+TyLKT1HovAfFQb7mNL+owEdAA+IphYzDjbfu7kCYTOYr3o21!iLwResFGRK0lHn2y7uNJCZX62aG9qDLj1vVrkJd4gl/5VtjJV88tNzphY6ksEK8vZrS0zCET3xwq!KJ7L+no=
X-Complaints-To:	abuse AT gte DOT net
X-Abuse-Info:	Please be sure to forward a copy of ALL headers
X-Abuse-Info:	Otherwise we will be unable to process your complaint properly
NNTP-Posting-Date:	Tue, 22 Feb 2000 17:29:04 GMT
Distribution:	world
Date:	Tue, 22 Feb 2000 17:29:04 GMT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Tue, 22 Feb 2000 20:47:40 +0600 (LKT), Kalum Somaratna aka Grendel
<kalum AT crosswinds DOT net> wrote:

>What I wanted to comment about was that the loadall insn is a very
>powerful insn and that 32 bit real mode are posiible if loadall is used.
>If needed I can provide the details on how to do this but it is a bit
>lengthy and complex...

There's another way: go protected, set all segments'limits to 4 GB, go
real.  This works on some x86 chips.

>> The 286 and 386 have LMSW that can switch to real or protected mode. The
>> switch took place by setting some flags in the CMOS and some
>> manipulations which was d amn slow.
>                          ^^^^^^ BTW I had to put a space between the
>highlighted words since the DJ's email gateway rejected the reply saying
>"offensive language not allowed". Thats the second time this hapenned to
>me and through no fault of my own too. Sorry for mentioning this but this
>mail filter is really annoying.

You can:
1. say d4mn, $#!+, @$$, etc.
2. use net: http://www.deja.com/ then comp.os.msdos.djgpp
   Followups will be threaded properly if you use net news.

>> > So to avoid this timeconsuming mode switch 286 programmers used the
>> > 286 loadall insn to access >1MB memory.
>> 
>> Not ordinary programs. The BIOSes manily used this. Since the BIOS has to
>
>Actually the BIOS of 386 and above were designed to emulate the 286
>loadall since the large number of programs that used it. AFAIK RAMDRIVE,
>OS/2 all use/d loadall.

Did they fail on 486 and up?

>Grendel
>
>Hi, I'm a signature virus. plz set me as your signature and help me spread
>:)

My virus is sneakier.

-- 
Damian Yerrick  http://yerricde.tripod.com/
Comment on story ideas: http://home1.gte.net/frodo/quickjot.html
AOL is sucks! Find out why: http://anti-aol.org/faqs/aas/
View full sig: http://www.rose-hulman.edu/~yerricde/sig.html

This is McAfee VirusScan. Add these two lines to your .sig to
prevent the spread of .sig viruses.  http://www.mcafee.com/

- Raw text -