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From: paravashu <paravashu AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: strange problem with disk operations
Date: Mon, 20 Jul 2009 05:40:43 -0700 (PDT)
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

On Jul 19, 7:49=A0am, "Charles Sandmann" <cwsd DOT  DOT  DOT  AT earthlink DOT net> wrote:
> "paravashu" <parava DOT  DOT  DOT  AT gmail DOT com> wrote in message
>
> news:09d1167e-2bae-4774-ba28-23b332e1ca41 AT d9g2000prh DOT googlegroups DOT com...
>
> >I have tried with the bigstack cswdpmi.exe provided in the above link
> >http://clio.rice.edu/djgpp/bigstack.zip
> >when i dont combine this exe with my utility, the application works
> >fine without any hanging problem.
>
> When CWSDSTUB.EXE is combined with the executable, it will
> be used as the DPMI provider and not call CWSPMI.EXE, so
> this seems to have confirmed the problem.
>
> You might try the stacksize version, which will print out the amount
> of stack required. =A0You can then allocate a real mode stack in the
> 1MB region and specify this in the DPMI interrupt call to avoid
> the problem.
>
> So this seems to confirm the BIOS is poorly written for USB
> disk interrupts on this one machine.
Yep thanks a lot for the info...
but this way it takes lot of time about 1 hour...
so without using BIOS how can we program our USB for better
performance on these
kind of slow devices...do we have to write our own USB stack for
this ....if it is then
how can we go about it.....