From: tomstdenis AT my-dejanews DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Help, Protected Mode...
Date: Fri, 04 Sep 1998 12:18:16 GMT
Organization: Deja News - The Leader in Internet Discussion
Lines: 32
Message-ID: <6solq8$fnm$1@nnrp1.dejanews.com>
References: <3 DOT 0 DOT 5 DOT 16 DOT 19980903191614 DOT 2f0f5cbe AT mail DOT tir DOT com>
NNTP-Posting-Host: 206.75.140.161
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk


> Okay, I'm sitting here looking at intel op-codes trying to figure out how
> to enter protected mode and the command to enable the PM bit is said to be
> "privileged."  How do I enter protected mode through ASM?  Is there a way
> to use DJGPP to compile an OS and still be 32-bit?  Thanx.
>

In real mode?  Use

mov eax,1
mov cr0,eax
JMP FAR selector:offset

Now you are in protected mode.  For more compatibility try this

mov eax,cr0
or eax,1
mov cr0,eax
JMP FAR selector:offset

or for 286 compatibility....
LMSW
OR AX,1
SMSW
...

hehehe

tom

-----== Posted via Deja News, The Leader in Internet Discussion ==-----
http://www.dejanews.com/rg_mkgrp.xp   Create Your Own Free Member Forum