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From:	"Rod Pemberton" <do_not_have AT sorry DOT bitbuck DOT cmm>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Reading sectors: Error 0x701F
Date:	Sun, 16 Apr 2006 13:38:18 -0400
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"John Elliott" <jce AT seasip DOT demon DOT co DOT uk> wrote in message
news:e1tgib$ns9$1$8300dec7 AT news DOT demon DOT co DOT uk...
>    I'm trying to write a program that reads sectors from a hard drive
> using either INT 25h or INT 21h/AX=7305h.
>
>    If I run it under Windows ME, the reads fail with error 0x701F,
> whether it's operating on a FAT32 drive or a FAT16 drive. I can't find
> any mention of this error in documentation; it turns up once or twice on
> Usenet, always in the context of calling INT 25h or INT 21h/AX=7305h
> from a DOS extender. That suggests I've made an error setting up the
> __dpmi_regs when making the call, but if so I can't see what it is. Does
> anyone have any suggestions?
>
>    (this is an old djgpp, based on gcc 2.7.2, but for such a simple
> operation I wouldn't have thought that would make much of a difference).

Okay, I didn't look at your code.  Int 25h and int 21h/ax=7305 will work
under real-mode DOS.  To get them to work under Win98/98SE/ME etc., you'll
need to add Windows file locking code.  The only working example of this
that I've found is Orwtin Glueck's "ODI's" LFN Tools:

http://www.odi.ch/prog/lfn/index.php
http://lfntools.sourceforge.net/

I don't know what changes have been made since the project moved to
sourceforge.  Also, there might be something buried in the DJGPP libraries,
but I never stumbled across it...


Rod Pemberton

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