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- Newsgroups: comp.os.msdos.programmer
- Path: sparky!uunet!mcsun!sunic!ugle.unit.no!troll.sipaa.sintef.no!bjorn.myrland
- From: bjorn.myrland@sipaa.sintef.no (Bjorn Myrland)
- Subject: MSDOS 5.0 vs other DOS 5s : Bug?
- Message-ID: <bjorn.myrland.90.716051993@sipaa.sintef.no>
- Summary: Difference between MSDOS and PCDOS++ 5.0 is identified
- Keywords: MSDOS, bug
- Sender: news@ugle.unit.no (NetNews Administrator)
- Organization: SINTEF
- Date: Wed, 9 Sep 1992 15:19:53 GMT
- Lines: 44
-
- I have a problem that I hope at least one of you out there could shed some
- light on. We have a program that functions very well when run on machines
- with all other DOSs than Microsoft's own DOS 5. It runs ok on DOS 3.3, 4 and
- on OEM versions of DOS 5, but *not* on the original MSDOS 5.
-
- I have not had the opportunity to do much debugging on the program yet, but
- it is a fairly simple one written in Microsoft C, mostly doing some file
- handling stuff. When run in a DOS shell under Windows, it is aborted by
- Windows with a message saying "...illegal instruction, close down and
- reboot...". Windows hangs when exiting, making me suspect that some DOS code
- or data area is overwritten.
-
- A call to Microsoft's MSDOS technical support did not do much good. The MS
- guy believed that the OEM versions were all based on Microsoft's code, with
- only minor changes. Furthermore, no revisions of MSDOS 5 have ever been
- issued (i.e. no 5.01 etc). If this is the case, then my application should
- run equally good or bad on all DOSs, which it obviously does not.
-
- There is a bug in my application, no doubt, but with some rather odd
- properties that I partly will have to explain to the users who cannot
- run the program even on plain vanilla machines with the original MSDOS
- 5 installed. So, could somebody help me clear up on these DOS matters a
- little bit? For example:
-
- - Who licences DOS code from who?
- - Who uses IBMBIOS.COM/IBMDOS.COM and who uses IO.SYS/MSDOS.SYS ?
- - Are there any known functional differences between the different
- DOS brands? Any of the OEMs having bug-fixed the original
- MSDOS code?
- - If the program fails on MSDOS 5, what other OEM DOSs should I
- expect it to fail with?
-
- Thanks,
- Bj¢rn.
-
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- Bjorn Myrland * bjorn.myrland@sipaa.sintef.no
- SINTEF Safety and Reliability * N-7034 Trondheim, NORWAY
- -------------------------------------------------------------------
- SINTEF - The Foundation for Scientific and Industrial Research
- at the Norwegian Institute of technology
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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