MSD Reports an 80287 Math Coprocessor as an 80387 (104189)
The information in this article applies to:
• 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 Q104189
The Microsoft Diagnostics (MSD) utility versions 2.0a (which ships
with Windows 3.1) and 2.01 (which ships with MS-DOS 6.0) may report an
80287 math coprocessor as an 80387 coprocessor.
Other diagnostic software may display similar results or say that the
coprocessor is not functioning properly.
This problem is caused by the design of the hardware.
The following 80287 math coprocessors have been confirmed by their
manufacturers as being detected incorrectly by various diagnostic
software programs or utilities:
• Intel 287XL
• Cyrix 82S87
To obtain correct information regarding your 80287 coprocessor, use
diagnostic software provided with the hardware, or call the
manufacturer for assistance.
Intel Customer Support (800) 538-3373 or (503) 629-7354
Cyrix Customer Support (800) 462-9749 or (214) 994-8387
Intel has a "FaxBack" number that you can use to obtain diagnostic
information. To obtain the Intel FaxBack article #3064, "Intel Math
CoProcessors and Diagnostic Programs," call Intel FaxBack at (800)
525-3019 or (503) 629-7576.
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