Intel Pentium OverDrive User manual

486 TM

3
Part Number: 351599-005
Copyright © 1996 Intel Corporation. All rights reserved.
Intel Corporation
5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
Intel Corporation assumes no responsibility for errors or omissions in this
guide. Nor does Intel make any commitment to update the information
herein.
*All other brand and product names are trademarks of their respective
owners. First Edition July 1994
Second Edition April 1995
Third Edition September 1995
Fourth Edition January 1996
Fifth Edition July 1996

4
This symbol indicates a CAUTION or
WARNING. These are operations or
situations that may be harmful or
dangerous to you or your equipment.
All cautions and warnings should be
read and observed.
Explanation of symbols used in this guide:
This symbol indicates a NOTE. Notes
areitemsofspecialinterestthatpertain
to the section or procedure you are
reading. Notes typically clarify or
augment the material in the text.
Introduction.................................................................................... 4
Before You Begin... ....................................................................... 4
Installation...................................................................................... 5
Demonstration and Diagnostics Diskette .................................... 19
Troubleshooting ........................................................................... 20
Getting Help................................................................................. 28
Warranty....................................................................................... 30
Appendix A .................................................................................. 32
Contents
Serial Number: P240076

5
• the layout of any components or empty
sockets. Do the sockets have handles?
• the size of any components or empty
sockets. Youmust have a socket large
enough to fit the Pentium OverDrive
processor. In order to install the
Pentium OverDrive processor, you
must havea 237or238 pinsocket. See
page 10 for details.
Introduction
Congratulations on your purchase of a PentiumOverDriveprocessor!
The Pentium OverDrive processor for Intel486™processor-based systems is
a single chip processor upgrade for systems based on Intel486SX, Intel486
SX2™, Intel486 DX, and Intel486 DX2™processors, and makes all software
run faster on existing systems.
BeforeYou Begin...
This section provides instructions you should read before starting the Pentium
OverDrive processor installation.
On most computers, installing the Pentium OverDrive processor is simple if
you carefully follow the directions in your computer owner's manual and in
this manual. Before starting the installation process, we recommend you take
a few moments to:
• familiarize yourself with the appearance of your system's layout.
• read through the entire Installation section of this manual to fully
understand the process.
Your System's Layout
If you have not previously viewed your system's layout, at this point you may
wish to unplug your system, remove the cover and familiarize yourself with
the appearance of your system's components before continuing. Look for:
• the general appearance of your motherboard (the large board in
the bottom of your computer to which all other components are
attached). Are there cards or cables
near or attached to your motherboard?
Your system must
have a 237 or 238-pin
socket

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Step 1 - Install the diskette software and view
the animated demo.
Intel includes a Demonstration and Diagnostics Diskette with your Pentium
OverDrive processor. The diskette contains two portions:
•ademonstration to guide you through the Pentium OverDrive
processor installation procedure.
• diagnostics to test your Pentium OverDrive processor for
proper installation and operation.
To view the demo, your computer must be equipped with a VGA video board
and monitor, and you need to install the diskette software on your system.
Installing the software program to view the demo also
places the diagnostic utilities on your hard disk. Intel
provides you with a utility to remove the diskette
software from your hard disk once you have completed
your Pentium OverDrive processor installation and
diagnostics. For more information on this utility or on
the diagnostic software, see the section Demonstration
and Diagnostics Diskette.
Installing the Diskette Software
You can use DOS* or Windows* to install the software on the diskette. The
full set of utilities takes 1.1 MB on your hard disk if you install it using DOS
and 1.2 MB if you install it using Windows. If you install the software from
DOS,youareaskedifyouwishtoapprovemodificationoftheAUTOEXEC.BAT
file. Intel recommends that you choose OK.
The installation program also asks you if you wish to only install the Fan
Monitor portion of the diagnostic software. If you want to install the fan test
software to your hard drive but do not desire the demonstration or post-install
diagnostics, choose this option.

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To install the software on your hard disk, insert the diskette in drive A and:
For DOS users type: a:\install e
For OS/2* or Windows NT*
users type from a DOS prompt: a:\install e
For Windows users: In the Program Manager, select: FILE
and then select: RUN
On the Command Line, type: a:setup
and click OK
For Windows 95 users: From the task bar, select Start
From the Start menu, select Run
and at the prompt type:
\SETUP
To begin the demonstration after installing the software:
For DOS users: Go to the odp_util directory and type:
overdriv e
For Windows NT users : Go to the odp_util directory and
type from a full-screen DOS prompt:
overdriv e
For Windows users: Double click the icon “OverDrive
Processor Demo/Diagnostics”
For OS/2 users: Ensure that the following line ap-
For more information, pears in your config.sys file:
refer to Troubleshooting VME=NO
section, p. 26. Ensure that the settings for your DOS
full-screen command prompt in-
cludes the following:
HW_TIMER set to ON
From a full-screen DOS prompt type:
overdriv e
For Windows 95 users: Press e or click OK
When the Main Menu appears, select "Installation Demonstration." If instal-
lation sounds complicated after viewing the installation demo and after
reading through the installation sections of this manual, have a qualified
technician install the Pentium OverDrive processor for you.

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Step 2- Ground yourself, then unplug computer
and remove cover.
To prevent damage from static discharge to the Pentium OverDrive processor
and to your computer, touch the metal back or side panel of your computer’s
system unit to ground yourself. Then, turn off the computer and any attached
equipment (such as a printer), unplug the power cord, and remove the cover
from the computer.
Warning:DangertoEquipment! ThePentium
OverDriveprocessorcanbedamagedbystatic
discharge. Be sure to ground yourself before
handling the Pentium OverDrive processor by
touchingthemetalon yourcomputer. Limiting
your movements during installation reduces
static electricity.
If installation sounds risky, have a qualified
technician install the Pentium OverDrive pro-
cessor. If you make a mistake, you could
damage the Pentium OverDrive processor,
damage your computer, or injure yourself. If
youinstall it yourself,follow theseinstructions
exactly.

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Step 3 - Find the socket in which you will install
the Pentium OverDrive processor.
The socket in which you install your Pentium OverDrive processor may be
on your motherboard or removable processor card, and is near the Intel486
processor. If there is no specific Pentium OverDrive processor socket, you
must remove the original processor and install the Pentium OverDrive
processor in that socket.
If your system contains an Intel487™SX math
coprocessor, you must remove that component and
install the Pentium OverDrive processor in that socket.
The processor can appear in various forms. Your computer may have a
surface-mounted processor or a socketed processor, and the processor may
have a heat sink attached. However, the dimensions of the original processor
are similar to those of the Pentium OverDrive processor. Your computer
owner's manual may contain location information for the processor. If you
cannot locate the processor, contact your dealer or your computer manufac-
turer for assistance.
Socketed
Processor
Motherboard
Motherboard
Intel486 SX or DX
Processor
OverDrive
processor
socket
Surface-mounted
Processor Processor with heat sink attached
PC-2597a
486
Removable
Processor card

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Once you locate the processor, look in the immediate area to determine
whether or not your system has an empty socket specifically dedicated for the
Pentium OverDrive processor.
A Quick Word About Socket Types
There are several types of Pentium OverDrive processor sockets. You must
determine which socket type you have in order to successfully insert your
Pentium OverDrive processor.
Two common variations are the Zero Insertion Force (ZIF) socket and Low
Insertion Force (LIF) socket.
As the illustration shows, you can identify a ZIF socket type by the handle
which locks/unlocks to allow placement of the Pentium OverDrive processor.
LIF sockets do not have a handle, as shown.
handle
PC-1700 PC-1701
Typical Sockets With Handle (ZIF Sockets)
Note variations in pin hole layout
Typical Socket Without Handle (LIF Socket)

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Match your computer's socket layout to one shown in the chart, then proceed
to the indicated step in this manual.
486
RemovetheIntel486processorandinstallthePentium
OverDrive processor in the Intel486 processor socket. If
the Intel486 processor is not surrounded by an empty
row of pins, you cannot install the Pentium OverDrive
processor.
19 pinholes
per side
PC-1702
Empty Weitek socket beside Intel486 processor—go to Step 4.
Not an OverDrive processor socket! For
Weitek coprocessors only! Remove the
Intel486processorandinstall thePentium
OverDrive processor in the Intel486
processor socket. If the Intel486 processor
is not surrounded by an empty row of
pins, you cannot install the Pentium
OverDriveprocessor.
15 pinholes
per side
i487
TM
Removethe Intel487 SX math coprocessor
and install the Pentium OverDrive processor
in the Intel487 processor socket. If the math
coprocessor is not surrounded by an
empty row of pins, you cannot install the
PentiumOverDriveprocessor.
If your processor is soldered to the motherboard in a surface
mount, and you do not have a separate 237 or 238 pinhole
Pentium OverDrive socket, you cannot install the Pentium
OverDrive processor. Do not attempt to remove the
originalprocessor!
No empty Pentium OverDrive processor socket—go to Step 4.
Empty socket beside Intel486 processor—go to Step 5.
Pentium OverDrive processor socket with Intel487 SX math
coprocessor installed—go to Step 4. (Intel486 SX processor
systems only)
Surface-mounted processor only—not compatible!
Possible System Layouts
If the empty socket does not contain 237
or 238 pinholes (19 pinholes per side),
you cannot install the Pentium OverDrive
processor.
486