Q79250: IBM PCJr Incompatible with MS-DOS 5.0 and Later

Article: Q79250
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:5.x,6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 17-DEC-2000

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

- Microsoft MS-DOS operating system versions 5.0, 5.0a, 6.0, 6.2, 6.21, 6.22 
-------------------------------------------------------------------------------

SUMMARY
=======

IBM has confirmed that the PCJr will not operate properly with Microsoft MS- DOS
5.0 or later.

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

A symptom of above incompatibility is the following error message that may be
displayed during the MS-DOS 5.00 setup routine:

  Runtime Error R6003 - Integer Divide By Zero

Due to the architecture of the IBM PCjr, only MS-DOS versions 2.1 through MS-DOS
3.3 are considered compatible with the IBM PCjr series of computers.

Note: The IBM PCjr can only access a maximum of 640K. To use as much of the 640K
as possible, IBM suggests you not use any version of MS-DOS later than 3.3.

The product included here, the IBM PCjr, is manufactured by vendors independent
of Microsoft; we make no warranty, implied or otherwise, regarding this
product's performance or reliability.

Additional query words: 6.22 PC Jr Junior 5.00 5.00a 6.00 6.20 3rdparty

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS500a
Version           : MS-DOS:5.x,6.0,6.2,6.21,6.22

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

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.

Copyright Microsoft Corporation 1986-2002.