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Installing an Intel Math CoProcessor
Contents:
INSTALLING AN INTEL MATH COPROCESSOR -- GENERAL PROCEDURE
On most desktop computers, your math coprocessor is easy to install and
use. Many system manufacturers include information for installing math
coprocessor upgrades in their user*s guides. If you are unable to
obtain upgrade installation instructions from your system manufacturer,
complete the following steps. For more information, refer to the User's
Guide that came with your Intel Math CoProcessor.
1. Ground yourself
To prevent static discharge from damaging your system or your math
coprocessor, ground yourself by touching the metal back or side panel on
your computer.
2. Switch the power off and unplug your computer
Unplug the power cord and remove the cover from the computer as
described in your owner*s manual.
3. Check your math coprocessor
Be sure your math coprocessor is rated at a speed equal to or greater
than the speed of your computer's microprocessor. In addition, inspect
the math coprocessor for any damaged or bent loops or pins. Do not try
to repair damaged pins, but return the math coprocessor to your dealer.
4. Find the socket
Find the empty socket for your Intel Math CoProcessor by locating the
Intel microprocessor and looking for an empty socket nearby. Refer to
your system's documentation or contact with your dealer or system
manufacturer for further information.
Intel287 XL The square shaped Intel286 CPU and an empty
rectangular socket nearby. With the exception of the
Intel287 XLT sockets, all Intel287 math coprocessor
sockets have 20 pin holes on each side and a small
notch at one end.
Intel2The square shaped Intel286 CPU and an empty 1 inch square
bowl-shaped socket nearby. Electrical contacts line
the socket's inside perimeter.
Intel387 SL or SX The Intel386 SL or SX microprocessor and look for an
empty, square socket on the motherboard near the
microprocessor
Intel386DX The Intel386 DX processor and look for an empty
socket nearby that is similar in size and shape to
the processor.
5. Orient the math coprocessor correctly
Match pin 1 on the math coprocessor with pin 1 on the socket. The pin 1
corner on an Intel387 SX, Intel387 DX and the Intel487 SX is marked with
a small beveled edge and a white dot. The Intel 8087 and the 80287XL
has a small bevel cut in one end of the processor.
Pin 1 is marked on the socket with a notch, bevel, dot, arrow, or other
mark which could be on the system board. If you're unsure where pin 1 is
on your socket, refer to your computer manual or ask your dealer for
help.
6. Insert the math coprocessor
After aligning pin 1 correctly, lightly place the math coprocessor chip
into its socket. Press firmly and evenly on the math coprocessor to
either seat the loops of the Intel387 SX in the socket, or to seat the
pins of the 8087, Intel287 XL, Intel387 DX or Intel487 SX in the
socket. Math coprocessors that have pins may require considerable force
to seat the math coprocessor.
Warning: Your computer*s system board should not bend under the
insertion pressure. If it bends more than slightly, see your dealer for
assistance.
7. Set switches on the system board
You may need to set switches, jumpers or both on your computer's system
board to let the computer know you have added a math coprocessor. See
your computer owners manual, or contact the system's manufacturer for
more information. If you cannot obtain configuration information from
your manufacturer, call Intel's online services and request the document
containing configuration information for your system. This information
is also available through Intel's online services and.
In most cases, if you have correctly oriented the math coprocessor,
starting your computer does not damage the processor even if jumper or
switch changes are required--the system simply does not function
correctly.
8. Restart your computer
Put the cover back on the computer. Reconnect all the cables and cords,
and plug the power cord into the wall outlet. Turn your computer on.
9. Run reference or system configuraton program
Some computers have a System Installation, Reference, or System
Configuration program that must be run to enable the system to utilize a
math coprocessor. The program may be in ROM or on a disk. See your
owner's manual for more information.
10. Test the Intel math coprocessor in your computer
Use the software program on the utilities diskette that came with your
math coprocessor to test the math coprocessor. Run the diagnostics
program to verify the math coprocessor is operating correctly. If the
program shows the math coprocessor isn't operating correctly, contact
your dealer for assistance.
NOTE ON INSTALLING AN INTEL387 MATH COPROCESSOR IN A WEITEK SOCKET
Many computers contain a square socket for a Weitek math coprocessor.
This socket has three rows of holes on all four sides. In many
computers, such as the Compaq 386, the inner two rows of pins are
compatible with the Intel387 DX Math CoProcessor.
To install, enter the Intel387 DX Math CoProcessoron the inner two rows
and match pin 1 on the math coprocessor with the key pin hole on the
socket and then press down. Be sure that all the pins are aligned over
the socket holes before you push down. If you still have questions,
consult your computer user's manual.
Some computers, such as the TANDY 4000, have the Weitek socket but DO
NOT support the Intel387DX. Contact your computer manufacturer or
dealer for more specific information to ensure you should use the
Weitek socket for your math coprocessor.
For more information, refer to the following documents:
Document # Title
3065 MCP Installation Troubleshooting: Failure to Boot
3066 MCP Installation Troubleshooting: Lockups and Hangs
3067 MCP Installation Troubleshooting: Error Messages
3068 MCP Installation Troubleshooting: Using Diagnostics
3069 MCP Installation Troubleshooting: Diagnostic Failures
3071 MCP Installation Troubleshooting: Processor Not Functional
3072 MCP Installation Troubleshooting: Software Does Not
Function
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