IBM PCJr Incompatible with MS-DOS 5.0 and Later (79250)


The information in this article applies to:
    • Microsoft MS-DOS operating system 5.0
    • Microsoft MS-DOS operating system 5.0a
    • Microsoft MS-DOS operating system 6.0
    • Microsoft MS-DOS operating system 6.2
    • Microsoft MS-DOS operating system 6.21
    • Microsoft MS-DOS operating system 6.22
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.
Modification Type: Major Last Reviewed: 5/10/2003
Keywords: KB79250
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