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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!gatech!paladin.american.edu!auvm!CUNIXB.CC.COLUMBIA.EDU!PJB3
- Message-ID: <CMM.0.90.4.725736007.pjb3@cunixb.cc.columbia.edu>
- Date: Wed, 30 Dec 92 12:20:07 EST
- Sender: Nota Bene List <NOTABENE@TAUNIVM.BITNET>
- From: "Paul J. Bodin" <pjb3@CUNIXB.CC.COLUMBIA.EDU>
- Subject: Re: Orbis and limitations
- Comments: To: Nota Bene List <NOTABENE%TAUNIVM.BITNET@CUVMB.CC.COLUMBIA.EDU>
- Newsgroups: bit.listserv.notabene
- In-Reply-To: Your message of Wed, 30 Dec 92 11:41:45 -0500
- Lines: 40
-
- Mark Husbands writes:
-
- > The same problem just occurred at the Dos level and this time QEMM was
- > kind enough (?) to leave the following message:
- >
- > Exception #13 at 0EC8:AEC8, error code: 0000
- > AX=2732 BX=FFFF CX=BBFE DX=14AE SI=0000 DI=2732 BP=0000
- > DS=3408 ES=7907 SS=3408 SP=1ECB flags=7086
- > Instruction: 2B 07 76 29 9D F8 9C 8B F1 01 07 2B 4F
- > Do you want to (T)erminate the program or (R)eboot?
-
- This is a report by QEMM that a processor exception has occured.
- Exception 13 is the exception generated when a program tries to access
- an address in memory that is protected from it (for example, it will
- occur if a program tries to write to a video ROM address). This
- exception is not a QEMM function--it will occur whether QEMM is loaded
- or not if the program tries to execute this function. It's just that
- under DOS you will never know it occured until the program crashes,
- and then you won't know why. QEMM does you the service of trapping
- processor exceptions so that you know they have occured and can
- prepare for the consequences.
-
- The rest of the message lists the location and nature of the errant
- machine instruction, and the contents of the processor registers when
- it occured. If you send this information to the developer (NBI in
- this case) who has the source code and a map of the program they
- should be able to trace the bug and fix it. Unless you know the
- program at the code level, though, the information doesn't tell you
- much. If you would be willing to report the problem to NBI and send
- them the information that QEMM reported, along with a description of
- what you were doing when it occured, it might help them track down the
- problem. They would also need a description of your machine and its
- configuration, including the type and brand of video card, the amount
- of memory and how you have it configured, what you are using for an
- overflow drive, etc.
-
- ___________________________________________________________________________
- Paul J. Bodin Internet: pjb3@cunixb.cc.columbia.edu
- Union Theological Seminary smail: 435-52nd Street
- (718) 439-3549 Brooklyn, NY 11220
-