KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q84280: Librex: Problems Running DOS Applications in 386 Enhanced Mode

Article: Q84280
Product(s): Microsoft Windows 95.x Retail Product
Version(s): WINDOWS:3.0,3.0a,3.1,3.11
Operating System(s): 
Keyword(s): 
Last Modified: 07-NOV-1999

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

- Microsoft Windows versions 3.0, 3.0a, 3.1, 3.11 
-------------------------------------------------------------------------------

SUMMARY
=======

Librex brand notebook computers require the video patch LIBVGA.EXE to run an
MS-DOS-based application in a full screen in 386 enhanced mode. If the patch is
not loaded, video anomalies may be experienced, including a darkened or tinted
screen when switching between applications.

MORE INFORMATION
================

LIBVGA.EXE is a VGA patch available from Librex that prevents the Windows color
palette from becoming corrupted when an MS-DOS-based application is run in a
full screen in 386 enhanced mode.

LIBVGA.EXE should be used when running Windows 3.0, 3.0a, and 3.1. The standard
VGA video driver should be used in Windows 3.0 and 3.0a. The XGA (640 x 480 16
colors) video driver should be chosen when running Windows 3.1.

Librex technical support recommends contacting the local Librex dealer as the
quickest means of obtaining the patch; however, LIBVGA.EXE can be obtained
directly from Librex technical support.

To install LIBVGA.EXE:

1. Use a text editor (such as Notepad) to open the AUTOEXEC.BAT file, and add
  the following line

  [drive]\[dir]\LIBVGA.EXE

  where [drive] refers to the drive that contains the LIBVGA.EXE driver, and
  [dir] refers to the appropriate directory that contains LIBVGA.EXE. This line
  should be added to the end of the AUTOEXEC.BAT file, before any applications
  or shells, and AFTER any mouse drivers.

2. Save the file.

3. Restart the system.

The Librex products included here are manufactured by a vendor independent of
Microsoft; we make no warranty, implied or otherwise, regarding these products'
performance or reliability.

Additional query words: 3.00 3.1 3.11

======================================================================
Keywords          :  
Technology        : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a kbWin310 kbWin311
Version           : WINDOWS:3.0,3.0a,3.1,3.11

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

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.