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Subject:
Was there a 287XL math coprocessor?
From:
Oscar Viñas <[log in to unmask]>
Reply To:
PCBUILD - Personal Computer Hardware discussion List <[log in to unmask]>
Date:
Wed, 28 Jun 2000 14:44:31 -0400
Content-Type:
text/plain
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I have a book (Upgrading and Repairing PCs, 11/E, by Scott Mueller) where I
found a table resumming the characteristics of the math coprocessors (FPU)
that have existed: 8087, 287, 287XL, 387SX and 387DX. Aditionally all
processors and coprocessors are fully explained in the book exept that 287XL
found in the table.

Was really a 287XL math chip? Where was it used? What is that XL suffix?

The table says it was introduced in 1990. The 387DX was introduced in 1987
and the 387SX in 1988. Even the first 486 CPU was released in 1989. Who was
then doing a 287 coprocessor in 1990?

TIA

Oscar Viņas
University of Camaguey.

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