KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q93093: BUG: Memory Use Greater With DPMI Memory Than VCPI or XMS

Article: Q93093
Product(s): Microsoft Programming Utilities
Version(s): 4.0,4.01,4.05,4.1
Operating System(s): 
Keyword(s): kb16bitonly kbCodeView kbDebug kbVCkbbuglist
Last Modified: 26-JUN-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft CodeView for MS-DOS, versions 4.0, 4.01, 4.05, 4.1 
-------------------------------------------------------------------------------

SYMPTOMS
========

When the memory manager provides DPMI memory, the CodeView debugger is unable to
load a very large MS-DOS application. However, CodeView can load the application
when the memory manager provides VCPI or XMS memory to CodeView.

CAUSE
=====

CodeView requires more than 64K conventional MS-DOS memory (addressed below
640K) when it runs with a DPMI memory manager and only 17K when it runs with a
VCPI or XMS memory manager.

RESOLUTION
==========

If insufficient conventional memory is available when the system is configured
for DPMI memory, change the system configuration to provide VCPI or XMS memory.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft CodeView versions 4.0,
4.01, 4.05, and 4.1. We are researching this problem and will post new
information here as it becomes available.

Additional query words: 4.00

======================================================================
Keywords          : kb16bitonly kbCodeView kbDebug kbVC kbbuglist
Technology        : kbAudDeveloper kbCodeView kbZNotKeyword3 kbCodeView400DOS kbCodeView401DOS kbCodeView405DOS kbCodeView410DOS
Version           : :4.0,4.01,4.05,4.1

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.