Microsoft KB Archive/79250

= IBM PCJr Incompatible with MS-DOS 5.0 and Later =

Article ID: 79250

Article Last Modified on 5/10/2003

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q79250



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: KB79250

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