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From:	"Joel Saunders" <jbs30000 AT aol DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP TSR
Date:	Tue, 22 Jan 2002 11:59:36 +0000 (UTC)
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Reply-To:	djgpp AT delorie DOT com

Thanks for letting me know about the Simtel.net program, I'll check it
out.
And yes, I have also thought about calling command.com instead.
I might try that if I can't make a TSR.
Also, I know that the way I hooked the mouse is right, because in
another program I'm working on, I did something similar and it works
fine.
Although since this example is for a TSR, I should have thought about
locking the memory, but I don't have any experiance with doing things
like that.
And finally, on this: 
> >         r.x.ax = 0x3100;
> >         r.x.dx = 4;
> >         __dpmi_int(0x21, &r);
> This is an absolute no-no: you can't call the DOS TSR funcion from
> protected mode.  The DPMI spec disallows that.
The only reason I did it, is because on:
http://www.delorie.com/djgpp/doc/dpmi/api/310c01.html
It says
"If the objective is only to provide resident services to real mode
programs, the client should use the DPMI translation service Int 31H
Function 0300H to invoke DOS's Int 21H Function 31H directly."
Anyway, thanks for your help, I appreciate it.


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