Newsgroups: comp.os.msdos.programmer
Path: utzoo!utgpu!cunews!fts1!latour!micor!gwaigh
From: gwaigh@micor.OCUnix.On.Ca (Geoffrey Waigh)
Subject: Re: Serial line TSR - help needed please?
Organization: M.B. Cormier INC., Ottawa (Ont)
Date: Sun, 30 Dec 90 04:15:51 GMT
Message-ID: <1990Dec30.041551.4685@micor.OCUnix.On.Ca>
Keywords: serial TSR how nasty DOS stuff
References: <6517@crash.cts.com>

This may not apply to you, but if you try writing to disk with a DOS call
(which is the easy way to access the file system) in the background, it will
not behave.  DOS is extremely non-rentrant (sp?) and does not like people 
trying to do two things at once.  You will have to do something to be sure
that DOS is not doing it's thing when you want to flush your buffer.  I would
guess that grabbing INT 21 (ugh :-() may help but some Guru here may know a
better kludge.

gwaigh@micor.ocunix.on.ca | People wanting disclaimers here don't deserve
                          | to see that which is obvious.