🚀 go-pugleaf

aki@cruzio.santa-cruz.ca.us writes:

>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?
>> 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?


>Actually I've had UMB's disappear from MEM command's output,
>however they were still there (of course). I haven't yet
>been able to find the source of the problem,  but it looks
>very much like a bug in DOS 5. 

>I may not know exactly where the bug is coming from,  but it's
>not in configuration or anything like that. My bet is that
>DOS overwrites it's pointer to the first UMB.  When it looses
>that,  the whole thing is gone as far as DOS knows. Naturally
>the blocks remain there set up correctly and device drivers
>still work correctly with pointers being bueno all around.

>I suggest someone at Microsoft run DOS apps with debugging
>set to the memory location of the UMB pointer...

Turns out that my problem was caused by the Hellween virus.
(Bloody custommers comming in with infected machines :-)) 


>Aki. 
>-- 
>/  Phone: 408-662 9664   Fax: 662 9676  |  586 is a 586 no matter what  \ 
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-- 
Erik van Linstee   |   Delft University of Technology   |   I'll be back ... 
----
   We are god, 'cause only we can create the idea of his existence
   in our holy brains...  (Yello)