NTVDM illegal instruction

NTVDM illegal instruction

[Michael Eager]

I'm getting pop-up error message from "16-bit MSDOS Subsystem"
which complains about "NTVDM illegal instruction" and gives 
CS:05d8, IP:0e9d, OP:ff620200 (none of which seems remarkably useful).
It also displays /usr/src/redhat/SPECS which is the current directory.

I'm running the latest version of Cygwin on NT2K, latest SR, on an 
Athlon processor.  The problem seems reproducable.  At the time I get
the error, there are several copies of bash running, as well as rpm,
cmd, make, and NTVDM.  

The MS website has a page on "Troubleshooting NTVDM and WOW Startup Errors",
( http://support.microsoft.com/support/kb/articles/Q196/4/53.ASP )
which I'll follow and see if it helps.  

Has anyone encountered similar problems?

-- 
Michael Eager	 Eager Consulting     eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077

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Re: NTVDM illegal instruction

[Larry Hall (RFK Partners, Inc)]

At 01:26 PM 7/13/2001, Michael Eager wrote:
>I'm getting pop-up error message from "16-bit MSDOS Subsystem"
>which complains about "NTVDM illegal instruction" and gives 
>CS:05d8, IP:0e9d, OP:ff620200 (none of which seems remarkably useful).
>It also displays /usr/src/redhat/SPECS which is the current directory.
>
>I'm running the latest version of Cygwin on NT2K, latest SR, on an 
>Athlon processor.  The problem seems reproducable.  At the time I get
>the error, there are several copies of bash running, as well as rpm,
>cmd, make, and NTVDM.  
>
>The MS website has a page on "Troubleshooting NTVDM and WOW Startup Errors",
>( http://support.microsoft.com/support/kb/articles/Q196/4/53.ASP )
>which I'll follow and see if it helps.  
>
>Has anyone encountered similar problems?



In case you weren't sure, Cygwin doesn't use NTVDM.  If you're looking 
to narrow down the scope of the problem, you should be able to eliminate
Cygwin as a potential source as a result.






Larry Hall                              lhall@rfk.com
RFK Partners, Inc.                      http://www.rfk.com
118 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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Re: NTVDM illegal instruction

[Dario Alcocer]

>>>>> "Michael" == Michael Eager <eager@eagercon.com> writes:

    Michael> I'm getting pop-up error message from "16-bit MSDOS
    Michael> Subsystem" which complains about "NTVDM illegal
    Michael> instruction"
             <--snip-->
    Michael> I'm running the latest version of Cygwin on NT2K, latest
    Michael> SR, on an Athlon processor.  The problem seems
    Michael> reproducable.
             <--snip-->
    Michael> Has anyone encountered similar problems?

Yes.  I was getting NTVDM errors when I was trying to generate a cross
compiler (unfortunately, I didn't hear anything regarding this):

    http://www.cygwin.com/ml/cygwin/2000-12/msg00059.html

In this instance, it appeared related to forking the compiler for a
configure test.  The other time I saw these NTVDM errors were when
configure was trying a vfork() test (also when I was trying to build
another cross compiler.)  In both cases, the bug could be reproduced
roughly 90% of the time.

If I had to guess, I'd say there's some sort of issue with the
fork()/vfork() implementation.  Unfortunately, I didn't have the time
then, but I might be able to help you track this error down this time.
The only thing I have to offer is the fact that I have an old copy of
SoftICE for NT, so if I can reproduce this bug (and find my copy of
SoftICE), I might be able to contribute.

-- 
Dario Alcocer -- Sr. Software Developer, Helix Digital Inc.
alcocer@helixdigital.com -- http://www.helixdigital.com

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Re: NTVDM illegal instruction

[Michael Scheibler]

From: "Michael Eager" <eager@eagercon.com>
Sent: Friday, July 13, 2001 7:26 PM


> I'm getting pop-up error message from "16-bit MSDOS Subsystem"
> which complains about "NTVDM illegal instruction" and gives
> CS:05d8, IP:0e9d, OP:ff620200 (none of which seems remarkably useful).
> It also displays /usr/src/redhat/SPECS which is the current directory.
>
> I'm running the latest version of Cygwin on NT2K, latest SR, on an
> Athlon processor.  The problem seems reproducable.  At the time I get
> the error, there are several copies of bash running, as well as rpm,
> cmd, make, and NTVDM.
>
> The MS website has a page on "Troubleshooting NTVDM and WOW Startup
Errors",
> ( http://support.microsoft.com/support/kb/articles/Q196/4/53.ASP )
> which I'll follow and see if it helps.
>
> Has anyone encountered similar problems?

I have! Not with cygwin, but with mingw gcc running in a cygwin bash. When I
am running ./configure on GNUstep and it tries to determine if it runs on
cygwin I get this strange message. However it's not really a problem because
it says no after that, so I didn't need to find out more about it.

Michael Scheibler

>
> --
> Michael Eager Eager Consulting     eager@eagercon.com
> 1960 Park Blvd., Palo Alto, CA 94306  650-325-8077
>
> --
> Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
> Bug reporting:         http://cygwin.com/bugs.html
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>



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