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From: marks@cs.keele.ac.uk (Mark Scase)
Newsgroups: comp.sys.ibm.pc
Subject: Problems with Compaq SLT/286 and QuickBasic 4.5
Keywords: Compaq SLT/286, QuickBasic 4.5
Message-ID: <1128@kl-cs.UUCP>
Date: 31 Oct 89 11:54:42 GMT
Organization: University of Keele, England
Lines: 29

I have a problem when running Microsoft Quickbasic 4.5 (don't
laugh) on my Compaq SLT/286 model 40.  Incidentally, the
Compaq is running Compaq DOS 4.01.
This problem occurs only when the Compaq is battery powered and
never when the machine is powered by the AC adaptor.
When I try to run or compile a BASIC program from within the
integrated development environment of Quickbasic the screen
of the Compaq turns completely white and therefore no characters
are visible.  The SLT/286 does not hang up - only the screen is
affected - but with nothing appearing on the screen the machine
is not that useful.  If I press the appropriate keys I can exit
from Quickbasic and return to DOS (still with the screen whited
out).  If I then run any other program which uses graphics then the
screen of the SLT/286 returns to normal.  Therefore it appears
that somehow Quickbasic is turning the SLT/286 into graphics
mode at an inappropriate time.
This effect happens no matter what BASIC program is loaded into
Quickbasic and, I repeat, only happens when the SLT/286 is under
battery power.
I have contacted Microsoft and Compaq and they blame each other!
I am not running any memory resident programs at the same time
which might upset Quickbasic.
Has anyone on the net experienced similar problems?
Any advice would be appreciated.

Mark Scase
Department of Communication & Neuroscience
University of Keele, UK.
coa44@uk.ac.kl.seq1   or  marks@uk.ac.kl.cs