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NNTP-Posting-Date:	Tue, 03 Apr 2007 01:32:49 -0500
Date:	Mon, 02 Apr 2007 23:32:47 -0700
From:	Jim Michaels <NOSPAMFOR-jmichae3- AT yahoo DOT com>
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: cwsdpmi "protected mode not availible" on win2k, stub don't work
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

DJ Delorie wrote:
>> I'm using only the latest binaries from the 2.03 compiler set of DJGPP.
> 
> Look in pub/djgpp/beta, which is the pre-release for 2.04
> 
>> I'm looking at the generated EXE code by gxx and gcc and they both
>> have this at the top close to somewhere after the MZ signature of a
>> standard EXE:
> 
> That's the standard 2kb stub loader, the code that gets your program
> into 32-bit mode.  It talks to DPMI, and knows how to load CWSDPI if
> no DPMI server is present, but does not *require* CWSDPMI.
> 
>> The application calls BIOS.H's biosdisk(): under windows XP the
>> application causes Windows to throw the message: 16-bit MSDOS
>> Subsystem: An application has attempted to directly access the hard
>> disk, which cannot be supported.
> 
> Sounds like XP is doing the right thing, by protecting the OS from
> rogue programs trying to corrupt the hard drive.

great. I just want to read and save the partition boot & MBR sectors for 
archival purposes. :-(
I thought it would be be handy for certain operations of system rebuilding.

looks like I go back to DOS floppies.  I found an API call that might do 
the trick, but I would have to know ATA commands, and the PDF for that 
is huge.

Does DJGPP have any other direct disk I/O API than biosdisk()/bios.h? 
My guess is no.

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