Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!csd4.milw.wisc.edu!bionet!agate!ucbvax!hplabs!hp-sdd!craigb
From: craigb@hp-sdd.hp.com (Craig Bosworth)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Dos File Access In TSR's
Summary: I don't know, but...
Keywords: TSR DOS
Message-ID: <2172@hp-sdd.hp.com>
Date: 21 Jun 89 20:04:58 GMT
References: <157@wbcs.UUCP>
Sender: news@hp-sdd.hp.com
Reply-To: craigb@hpsdl134.UUCP (Craig Bosworth)
Distribution: na
Organization: Hewlett-Packard, San Diego Division
Lines: 11

The only thing I know about this is that DOS functions are not
reentrant.  So, if your TSR wakes up while DOS is executing a 
function, you could kill things very easily.  If you could 
check an "in DOS" flag, you could wait until the next timer
tick, check the flag again, and make your DOS calls when that 
flag is clear...

I (obviously) don't know much about this, but I would be very
interested in finding out.  Please post! :-)

BOS