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From: sonny@charybdis.harris-atd.com (Bob Davis)
Newsgroups: comp.os.msdos.programmer
Subject: Re: TSR PROGRAMMING PROBLEM
Message-ID: <5369@trantor.harris-atd.com>
Date: 29 Jan 91 19:47:52 GMT
References: <1991Jan26.195955.12946@ugle.unit.no> <1991Jan26.220820.7855@uwasa.fi> <8256@ucdavis.ucdavis.edu> <1991Jan29.173752.10045@bronze.ucs.indiana.edu>
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Reply-To: sonny@trantor.harris-atd.com (Bob Davis)
Organization: Advanced Technology Dept., Harris ESS, Melbourne, FL
Lines: 64

In article <1991Jan29.173752.10045@bronze.ucs.indiana.edu> yawei@bronze.ucs.indiana.edu (mr. yawei) writes:
>In article <8256@ucdavis.ucdavis.edu> chiang@iris.ucdavis.edu (Tom Chiang) writes:
>>
	[DELETIONS]
>
>This is called the DOS re-entrancy problem which anyone who is teaching
>you to write TSRs should have told you about. Simply speaking, DOS
>cannot be entered twice. Since the int 16h request most likely comes
>from inside DOS, issuing another DOS call destroys the stack of the
>first call thus causing the system to crash. (Actual situation is more
>complicated since DOS uses several stacks. Try to get some books on this
>subject. Unfortunately, I can't think of any good books on writing
>TSRs. Has anyone seen one?)
>

	Those wishing to learn more about the writing of TSRs might
be interested in my evolving software package called TBONES. The
current preliminary version is TBONES07, with 08 coming soon.
	E-mail for a copy.

	The following is an excerpt from TBONES07.DOC:

SOURCES OF FURTHER INFORMATION ON PROGRAMMING TSRs:

	BOOKS:
        -----
        One of the best treatments I know of on the complex considerations
in writing a robust TSR appears in:

                _Inside DOS: A Programmer's Guide_
                Author: Michael J. Young
                Publisher: SYBEX, 490 pp., (C)1988, 1990.
                Chapter 11: "Memory Residency" pp. 321-360.

        A book which contains a wealth of information useful in designing
good TSRs is:
                _Undocumented DOS: A Programmer's Guide to Reserved
                                   MS-DOS Functions and Data Structures_
                by Andrew Schulman, Raymond J. Michels, Jim Kyle,
                   Tim Paterson, David Maxey, and Ralf Brown.
                Publisher: Addison-Wesley Publishing Company, Inc., (C)1990.
                Chapter 5: "Memory Resident Software: Pop-ups and
                            Multitasking" by Michels, Paterson, and
                                             Schulman.

        I also have learned much from the book:

                _DOS Programmer's Reference, 2nd Edition_
                by Terry Dettmann and revised for 2nd Edition by Jim Kyle
                (C)1989 by QUE Corporation, Programming Series

        I have found it indispensable as a source for detailed DOS programming
information.

        The Waite Group's _Microsoft Macro Assembler Bible_ by Nabaiyoti
Barkakati has been most useful on Assembly Language matters.


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