Mail Archives: djgpp/2009/07/13/05:15:23
On Jun 28, 9:10=A0pm, "Charles Sandmann" <cwsd DOT DOT DOT AT earthlink DOT net> wrote:
> "paravashu" <parava DOT DOT DOT AT gmail DOT com> wrote in message
>
> news:86e53db7-9815-42a4-a7bc-bcf5276da9a4 AT p18g2000pra DOT googlegroups DOT com...
>
> >i m facing a strange problem with disk reads and writes through
> > __dpmi_int API.
> > I am trying to perform DISK reads/writes from USB (which is also a dos
> > bootable). but the programs always hangs at a particular LBA value.
> > very wierd behaviour..some times load error..comes...some other times
> > no swap file error comes... some times crashes...:-)
>
> Assuming you are using CWSDPMI. =A0Hangs and strange behavior can
> come from over running the 16-bit internal stack. =A0Some bad Int 13
> providers have been demonstrated to have excessive stack usage.
> Seehttp://clio.rice.edu/djgpp/r5bug01.txtfor an example. =A0This might
> explain why it works on one machine, but not another.
>
> One way to analyze this is usinghttp://clio.rice.edu/djgpp/bigstack.zipor=
http://clio.rice.edu/djgpp/stacksiz.zipto see if stack overrun is the
> problem.
>
> > But with the same setup , ghost works perfectly witout any error.
>
> Depending on which version of Ghost is used, and if it uses int 13,
> that might not be important.
>
> > the same setup n environment on a different machine works perfectly
> > without any error with our application.
>
> That points to something machine specific. =A0Is the USB device the
> same? =A0If so, that points to the machine BIOS, memory size, or
> memory layout.
>
> > The problem is obvserved when we run the application from USB. please
> > clarify as to why this is happening...
> > just not able to find the cause of the problem at 11th time when we
> > issue the __dpmi_int(0x13,®s); interrupt.
>
> Difficult to diagnose without very detailed information, such as the EXAC=
T
> messages to the screen each time it hangs.
Yes I have tried with the exes in the links you have posted above but
to no result..
DJGPP 2.03p2 or 2.04?
guess version 2.02...(how can I verify it?) ..opened in notepad and
seen something like v2.02
2. Pure Dos...no TSRs no drivers nothing...
the problem occures with any USB pen drive.
actually I have two scenarios...
one is to boot from and run the utility from network and another is to
boot and run from
USB pen drive..
In network case the same machine, same DOS environment , the utility
works fine but
when i Boot from USB, the utility hangs at an LBA value 63.
3.THe utility is a backup and restore utility that works on the flash
disk.
4.But when I run GHOST from USB the utility is working fine....
5. One thing i observed, when i played with config.sys file with
different stack sizes and file handles etc..
the control has progressed very much but still after some times, it
hangs...
but the same utility from network boot on the same device did not pose
any threats...
please advice
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