Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!hubcap!ncrcae!ncrlnk!ncrwic!wbcs!chris
From: chris@wbcs.UUCP (Chris Rott)
Newsgroups: comp.sys.ibm.pc
Subject: Dos File Access In TSR's
Keywords: TSR DOS
Message-ID: <157@wbcs.UUCP>
Date: 21 Jun 89 14:33:30 GMT
Organization: Boeing Computer Services, Wichita KS
Lines: 14

I want to write a TSR program that periodically wakes up and accesses a file
(using DOS services).  The purpose of accessing the file is to update the
time stamp.  I know how to set up the TSR and to set alarm interrupts and all,
but I suspect I will have problems if I just invoke dos services inside this
interrupt.  Has anyone had experience writing these kind of TSR's?  Are there
flag bytes somewhere that indicate whether or not DOS is in a 'safe' state in
terms of disk i/o.  I know that these kind of programs are possible, given that
the print queue manager provides asynchronous i/o, but I cant find any docs on
how to do it.  Any help would be greatly appreciated!  Please email responses.
Thanks in advance for your help.
-- 
Chris Rott	Boeing Computer Services
MAIL: PO Box 7730, MS K79-32 / Wichita, KS 67277-7730
UUCP: {scubed!ncr-sd,fenix!ncrlnk,hplabs!hp-sdd!ncr-sd}!ncrwic!wbcs!chris