TITLE:              Introduction to DOS Protected Mode Services (
DOCUMENT ID:        TID14915
DOCUMENT REVISION:  1
DATE:               15FEB94
ALERT STATUS:       Yellow
README FOR:         NA

NOVELL PRODUCT and VERSION:
Novell DOS 7

ABSTRACT:
NA

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ISSUE:

DPMS.EXE is the newest tool contained in Novell DOS 7 for maximizing
available memory.  DPMS (DOS Protected Mode Services) is a suite of
services that allow DOS devices and other resident system extensions
(such as TSRs and disk drivers) to run in Protected mode on 286 and
386+ computers.  By using DPMS services, an application can reliably
execute or store data in extended memory.  This reduces the use of
Conventional memory (leaving it free for applications that require
Conventional) without the need to use Upper Memory or High Memory.

DPMS is tailored to meet the requirements of TSR applications.  It
has a minimal suite of services that results in DPMS having a very
small footprint of about 1 KB of conventional memory.  Novell DOS 7
includes several DPMS client components.  These include the Stacker
disk compression driver, NWCACHE (disk cache), CD-ROM extensions, a
peer-to-peer network server, and VDISK.

DPMS services are provided by the DPMS.EXE server that is loaded in
CONFIG.SYS as a device.  DPMS is DOS and memory manager independent
and is compatible with Windows 3.0 and 3.1.

The DPMS API (Application Programming Interface) is available as a
Software Developer's Kit (SDK) to third-party developers.  Developers
will be able to license and distribute DPMS free of royalty charges. 
The DPMS SDK is available through Novell's Professional Developer
Program, by calling 800-RED-WORD  (800-733-9673).

Other technical information is available in Novell's Network Support
Encyclopedia, NPD Bullets volume 5 number 6, AppNotes October 1993
(This information is available on CompuServe, in the NetWire forum)
and the INDRUS Resource magazine July-August 1993 volume 8 number 4.

Source Information:

Novell Application Programming Interface (API), DOS Protected Mode
Interface, specification version 0.9, July 26,1990 DOS Protected Mode
Services, specification version 1.0, July, 1993

Extended Memory Specification (XMS), version 2.0, July 19, 1988
Copyright (c) 1988, Microsoft Corporation, Lotus Development
Corporation, Intel Corporation, and AST Research, Inc.     Microsoft
Corporation

     Box 97017
     16011 NE 36th Way
     Redmond, WA 98073

     LOTUS (R)
     INTEL (R)
     MICROSOFT (R)
     AST (R) Research

Virtual Control Program Interface (VCPI), version 1.0, June 12, 1989

     VCPI SPONSORS
     A.I. Architects, Inc., Peabody, MA
     Lotus Development Corp., Cambridge, MA
     Phar Lap Software, Inc., Cambridge, MA
     Quadram, Norcross, GA
     Qualitas, Inc., Bethesda, MD
     Quarterdeck Office Systems, Santa Monica, CA
     Rational Systems, Inc., Natick, MA
     VCPI Co-ordinators
     Phar Lap Software (617) 661-1510 Robert Moote
     Quarterdeck Office Systems (310) 392-9851 Daniel Spear
     Copyright Phar Lap Software, Inc., 1987-1989
     Copyright Quarterdeck Office Systems, 1987-1989

LOTUS(R)/INTEL(R)/MICROSOFT(R) Expanded Memory Specification EMS),
version 4.0, #300275-005, October, 1987, Copyright (C) 1987

     Lotus Development Corporation
     55 Cambridge Parkway
     Cambridge, MA  02142

     Intel Corporation
     5200 NE Elam Young Parkway
     Hillsboro, OR  97124

     Microsoft Corporation
     16011 NE 35th Way
     Box 97017
     Redmond, WA  98073

The INDRUS Resource "Developers Corner - DPMS" pg.12, volume 8,
number 4, copyright July-August, 1993, CONUG INC. Gary Blakenbiller

     INDRUS, CONUG, Inc.  405-691-3554
     P.O. Box 890086
     Oklahoma City, OK.  73189
     BBS (East)407-725-8978 (West)415-873-6256

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