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Article View: comp.sys.ibm.pc.misc
Article #11569

Re: Disappearing UMB's, get this.

#11569
From: Erik van Linstee
Date: Tue, 05 Jan 1993 10:51
54 lines
2938 bytes
joet@dcatlas.dot.gov (Joe Trott) writes:

>linstee@dutecaj.et.tudelft.nl (Erik van Linstee) writes:


>>The funniest thing happened to me. Yesterday, when I booted my
>>dos partition, I noticed I had no UMB's. I was rather surprised,
>>since I hadn't changed anything since I last used dos.
>>And behold, the himem.sys and emm386.exe settings were still
>>ok, yet, from the dos prompt (4dos or command.com) I could not
>>see any UMB's, emm386 repports 0 bytes available/free UMB
>>but a correct UMB start segment (C800), SI repports no UMB server
>>present, BUT the drivers in DEVICEHIGH's were loaded high and
>>functioning!!!

>Are you sure they were up high?

Yes. mem/c doesn't show them, the memory isn't missing from
the base 640k, but yet they work, so they are loaded.

>>How's that for a mysterie. Has my processor maybe gone off DOS
>>after having been running OS/2 for a while now :-) ?
>>I reinstalled DOS, reformatted c: disected config.sys, and what
>>else. No indication of failure. OS/2 runs fine, checkit confirms
>>the system board to be ok, yet, NO UMB's.
>>My suspicion is rather arroused though, by the fact that SI,
>>repports different memory sizes in the various info screens.
>>It finds 638 to be useable by DOS, yet 640 to be available.

>Sounds like some of your BIOS settings may have been changed, such as the ones
>for shadow RAM.  How much RAM is in your system?

17Mb, and the BIOS settings are ok.
I pulled out the original dos disks yesterday, and that confirmed the
fact that it must be a virus. I have no idea where it came from and
a virus scan did not reveal a thing.
It's pretty persistent though. I tried putting back my original setup
piece by piece and when I finally got to 4dos, it broke again.
Doing a sys c: from the original disks doesn't solve it, only
reformatting did. It seems to infect more than just the command
shell.


>-JTT

>Good .sig, by the way.  Crazy, isn't it?  We invent a God, and then pretend
>he/she/it invented us.
>I guess there are those who never outgrow the need for a "Father" figure,
>who will surely make everything all right somehow, someday, somewhere...

Over the rainbow... Yes, my thoughts exactly, except so many intelligent
people seem to disagree. One thing  I will never understand I guess.

Erik
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Message-ID: <1993Jan05.105121.3321@donau.et.tudelft.nl>
Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!bnr.co.uk!uknet!mcsun!sun4nl!dutrun!donau!dutecaj.et.tudelft.nl!linstee
References: <1993Jan01.181352.6500@donau.et.tudelft.nl> <1993Jan4.173117.14082@dcatlas.dot.gov>

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From: linstee@dutecaj.et.tudelft.nl (Erik van Linstee)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Disappearing UMB's, get this.
Message-ID: <1993Jan05.105121.3321@donau.et.tudelft.nl>
Date: 5 Jan 93 10:51:21 GMT
References: <1993Jan01.181352.6500@donau.et.tudelft.nl> <1993Jan4.173117.14082@dcatlas.dot.gov>
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