*BSD News Article 38633


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From: SteveJ@deltabbs.demon.co.uk (Steve J Brown)
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!uwm.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!pipex!demon!deltabbs.demon.co.uk!SteveJ
Subject: Anybody know of a really good TSR tutorial ?
Organization: Delta BBS +44 1252 546545
Reply-To: SteveJ@deltabbs.demon.co.uk
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Date: Tue, 29 Nov 1994 21:51:58 +0000
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        First off, apologies for the horrendous crosspost - please set
        followups as you see fit.

[Short] I'm looking for a comprehensive guide to writing TSRs that I can
        preferably grab from somewhere on the 'net.
        Any pointers would be appreciated.

[Long]  Specifically, I need to write a routine that will monitor COM1 for
        a pre-defined signal and then read a string of ASCII characters
        not exceding 255 bytes (2400 baud 8N1) before writing them to disk
        for post processing.
        What I really need to know is if it's possible to use int 14h to
        grab the data from the port from within the TSR and can I safely
        use file handles through int 21h to maintain the file on the disk.

        None of the books I've read have given the complete story on TSRs
        and I'd be grateful for any help whatsoever if you've ever had to
        write somehting like that outlined above.

        10e6 TIA

sjb