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- ║ WHICH INTEL MATH COPROCESSOR DO I NEED? ║
- ║ ║
- ╚═════════════════════════════════════════════════════════════════════════╝
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- INTRODUCTION TO MATH COPROCESSORS
-
- You can usually find the recommended Intel Math CoProcessor listed
- in your computer's User Guide. Intel's FaxBACK(TM) Service also
- contains Math CoProcessor Compatibility Lists for many widely used
- computers. If your computer is not listed, you'll need to ask the
- computer manufacturer or their representatives which Intel Math
- CoProcessor is right for your computer.
-
- If these sources don't provide the necessary information there are
- some general guidelines you can follow to determine which Intel
- Math CoProcessor may be right for your computer.
-
-
- i486(TM) DX-BASED COMPUTERS
-
- The math coprocessor is built right into 486 DX, so a separate
- math coprocessor chip is not required.
-
-
- i486 SX-BASED COMPUTERS
-
- In i486(TM) SX-based computers, Intel has available the
- i487(TM) SX Math CoProcessor, which can be installed in the
- system's performance upgrade socket.
-
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- i386(TM) DX AND i386(TM) SX-BASED COMPUTERS
-
- In i386 based computers, the microprocessor and math coprocessor
- run at the same speed. In addition to the correct speed, you must
- know whether you need i387(TM) DX or i387(TM) SX math coprocessor.
- You can find the DX or SX designation on the i386 chip, or you can
- check with your computers manufacturer or authorized dealer to find
- out which Intel Math CoProcessor is compatible with your computer.
-
-
- 80286-BASED COMPUTERS
-
- The Intel 287(TM) XL works in 80286-based computers regardless of
- the computer's operating speed. Some laptop computers, such as
- the Compaq 286/LTE and Tandy 2800, have been specially designed to
- use the space-saving 287XLT. Consult your computer's user guide
- or the manufacturer if you're not sure which 287 is right for your
- computer.
-
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- 8088/8086-BASED COMPUTERS
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- In 8088/8086 computers, the microprocessor and math coprocessor
- usually run at the same speed. Your 8088/8086 computer will run
- at either 4.77 MHz, 8 MHz, 10 MHz, or a combination of these
- speeds. Match the math coprocessor to your computer's fastest
- operating speed. If you're not sure how fast your computer runs,
- check with your computer's user's guide or the manufacturer.
-
- ═══════════════════════════════════════════════════════════════════════════
- August 5, 1991 Intel FaxBack # 3002 Page 1
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- ╔═════════════════════════════════════════════════════════════════════════╗
- ║ ║
- ║ WHICH INTEL MATH COPROCESSOR DO I NEED? ║
- ║ ║
- ╚══════════════════════════════ (continued) ══════════════════════════════╝
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- INTEL MATH COPROCESSOR IDENTIFICATION SYSTEM
-
- Every Intel Math CoProcessor is marked to indicate its product
- number and maximum operating speed. Currently, Intel marks the
- top of each chip with the math coprocessor product number, a dash,
- then a number representing the maximum speed of the chip. Usually
- this number represents the speed in megahertz (Mhz), but Intel's
- previous marking scheme was slightly different. The numbers in
- parentheses in the following chart are from this previous marking
- scheme.
-
- ┌──────────────────┬──────────────────┬──────────────┐
- │ PRODUCT │ RATED │ INTEL │
- │ NUMBER │ SPEED │ MODEL # │
- ╞══════════════════╪══════════════════╪══════════════╡
- │ i487 SX │ 20 MHz │ BOX487SX │
- │ │ │ │
- │ i387 DX-33 │ 33 MHz │ BOX387DX-33 │
- │ i387 DX-25 │ 25 MHz │ BOX387DX-25 │
- │ i387 DX-20 │ 20 MHz │ BOX387DX-20 │
- │ i387 DX-16 │ 16 MHz │ BOX387DX-16 │
- │ │ │ │
- │ i387 SX-20 │ 20 MHz │ BOX387SX-20 │
- │ i387 SX-16 │ 16 MHz │ BOX387SX-16 │
- ├──────────────────┼──────────────────┼──────────────┤
- │ 287XL │ up to 12.5 MHz │ BOX287XL │
- │ 287XLT │ up to 12.5 MHz │ BOX287XLT │
- ├──────────────────┼──────────────────┼──────────────┤
- │ 8087-10 (-1) │ 10 MHz │ BOX8087-1 │
- │ 8087-8 (-2) │ 8 MHz │ BOX8087-2 │
- │ 8087 (-3) │ 4.77 MHz │ BOX8087 │
- └──────────────────┴──────────────────┴──────────────┘
-
-
- IF YOU NEED MORE INFORMATION
-
- Contact Intel Customer Information at any of the numbers below.
- Order the Math CoProcessor Catalog from FaxBack for a list of
- other Intel Math CoProcessor documents.
-
- U.S. and Canada (800) 321-4044
- International (503) 629-7000
- Fax Machine (800) 458-6231
- Compuserve "GO INTEL"
- MCI MAIL "INTEL SUPPORT"
- Intel BBS (503) 645-6275
- (9600bps, 8 bits, NO parity, 1 stop)
-
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- ═══════════════════════════════════════════════════════════════════════════
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- August 5, 1991 Intel FaxBack # 3002 Page 2
-