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- Newsgroups: comp.sys.ibm.pc.misc
- Path: sparky!uunet!panther!mothost!white!sapphire.rtsg.mot.com!dyer
- From: dyer@rtsg.mot.com (Bill Dyer)
- Subject: Re: Disappearing UMB's, get this.
- Message-ID: <1993Jan4.225023.24545@rtsg.mot.com>
- Sender: news@rtsg.mot.com
- Nntp-Posting-Host: graphite8
- Organization: Motorola Inc., Cellular Infrastructure Group
- References: <1993Jan01.181352.6500@donau.et.tudelft.nl> <1993Jan4.173117.14082@dcatlas.dot.gov>
- Date: Mon, 4 Jan 1993 22:50:23 GMT
- Lines: 54
-
- In article <1993Jan4.173117.14082@dcatlas.dot.gov> 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?
-
- Well, I hate to say this, but you may have a virus. The exact same
- thing happened to me when I caught the Stoned virus. Get yourself a
- good virus checker and scan your system. The first thing that went
- crazy on me when I caught the virus was the memory manager. Stoned
- (and other stealth type viruses) steal some memory to "hide" in and
- this totally messes up emm386.
-
- >
- >>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.
- >
-
- Yep, this is a classic symptom of the Stoned virus. That 2K
- difference may be the memory that Stoned stole to hide itself
- in.
-
- >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?
- >
-
- This is another possibility, my brother had the CMOS on his computer
- scrambled (from his 15 month old daughter flipping the power switch
- on and off is my guess) and things went totally crazy. However, your
- symptons don't sound like a BIOS problem, they sound an awful lot
- like a virus. Like I said before, get a virus checker and run it,
- it certainly couldn't hurt. Make sure to check all your floppies
- too, Stoned is transmitted in the boot sector of floppy disks.
-
- Later,
-
- -Bill
-
-