From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: ASM
Date:	Tue, 25 Feb 1997 20:07:57 -0800
Organization:	Two pounds of chaos and a pinch of salt
Lines:	23
Message-ID:	<3313B71D.7D0C@cs.com>
References:	<3313A399 DOT C33 AT bplorraine DOT fr>
Reply-To:	fighteer AT cs DOT com
NNTP-Posting-Host:	ppp206.cs.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Maxime Viallet wrote:
> 
> but when i do this :
>         movw $0xA000,%ax\n
>         movw %ax,%es\n
> The program crash ! (segmentation fault , i think...)

It's that 0xA000 that's hanging you up.  In protected mode (which is
what DJGPP uses), you cannot go around randomly accessing any absolute
memory address.  You have to use one of several techniques; which one
you use depends on what you need and how simple or fast you want it to
be.

The DJGPP Frequently Asked Questions list (v2/faq210b.zip) answers this
question and several others in the very first section of chapter 10.

-- 
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| John M. Aldrich, aka Fighteer I  |        fighteer AT cs DOT com         |
| "Starting flamewars since 1993"  |   http://www.cs.com/fighteer   |
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