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MCP INSTALLATION TROUBLESHOOTING: DIAGNOSTIC FAILURES
Contents:
MCP INSTALLATION TROUBLESHOOTING: DIAGNOSTIC FAILURES
FaxBack # 3069.00
There are several methods to test your Intel Math CoProcessor if you
experience problems after installation. If your system runs slower than
expected, or if your Math CoProcessor fails to function, you can use
Intel*s Advanced Diagnostics to try to diagnose the problem.
You can obtain Intel Advanced Diagnostics from your distributor, from
the Intel BBS, or by contacting Intel directly.
For more information on using Intel Advanced Diagnostics, refer to
FaxBack document 3068, MCP Installation Troubleshooting: Using
Diagnostics.
USING CHKCOP 2.2 TO TEST YOUR MATH COPROCESSOR
FaxBack # 3069.01
The Intel Math CoProcessor test program CHKCOP is also available on the
Intel BBS or from your dealer. If you aren't able to download CHKCOP,
you can request a copy from Intel Customer Support.
The parameters for CHKCOP are:
chkcop /c For continuous testing
chkcop n Where n is any number from 1 to 5, the numbers on the
command line are the tests which are skipped. (i.e.,
chkcop
/c 1 4 CHKCOP continuously tests on tests 2,3, and 5).
TROUBLESHOOTING A DIAGNOSTIC FAILURE AFTER INSTALLING AN INTEL MATH COPROCESSOR
FaxBack # 3069.02
Use the following suggestions if your computer or Intel*s diagnostics do
not recognize your Intel Math CoProcessor:
Check your computer owner's manual for any jumpers or switches that may
need to be set.
Check your computer owner's manual to see if there is a setup or
configuration program that needs to be run once you have installed the
math coprocessor.
Be sure that the math coprocessor is completely seated. Look to see if
the chip is seated flush in the socket and that one corner is not higher
than the others. Try pushing down on each corner.
Check that pin 1 on the math coprocessor matches pin 1 on the socket
and/or the motherboard.
If you are experiencing problems with drives or other accessories, check
to ensure that all cables and cards are fully seated.
If the above suggestions don't help, remove the math coprocessor and
check for any bent or broken pins and make sure the socket is clean and
free of dust. Then, reseat the math coprocessor. If you need a math
coprocessor extraction tool, contact your local dealer or Intel.
If you have access to another computer that is compatible with the math
coprocessor, install the math coprocessor in the second computer to
determine if the problem is with the math coprocessor or with the
computer.
The following solutions may help if your Intel Math CoProcessor
installation fails a specific diagnostic test:
TROUBLESHOOTING AN ARITHMETIC TEST FAILURE
FaxBack # 3069.03
If your installation fails one or more of the Advanced Diagnostic
Arithmetic tests, you may have a defective Math CoProcessor. However,
this is very rare. Use the troubleshooting section of your Intel Math
CoProcessor User*s Guide to determine if there are seating or alignment
problems that may affect the performance of your Math CoProcessor. If
this is not the cause of the problem, check with your dealer, who may
be able to test the math coprocessor in another computer.
TROUBLESHOOTING AN ENVIRONMENT TEST FAILURE
FaxBack # 3069.04
If your Intel387(TM) SX, Intel387 DX or Intel487 SX Math CoProcessor
installation fails an Advanced Diagnostic environment test, check to
ensure the jumpers and/or switches are set correctly. If the error
still occurs, remove the Math CoProcessor from the system and contact
your system manufacturer. The system may not be compatible with an
Intel math coprocessor.
INTEL DIAGNOSTICS CONFORMANCE TEST FAILURE WITH INTEL387(TM) SL MATH COPROCESSOR
FaxBack # 3069.05
If your Intel386 SL-based system with an Intel387 SL math Coprocessor
fails the Intel Advanced Diagnostics conformance test, but passes all
other tests, call the system manufacturer for a BIOS upgrade.
INTEL387 DX MATH COPROCESSOR RECOGNIZED AS AN INTEL287TM XL MATH COPROCESSOR
FaxBack # 3069.06
On some systems, the Intel Advanced Diagnostics may recognize the
Intel387 DX math coprocessor as an Intel287 XL math coprocessor and fail
some of the diagnostic tests. In most cases, the system is configured
for a Weitek math coprocessor rather than an Intel387 DX Math
Coprocessor. Correctly setting jumpers and/or switches usually solves
the problem.
INTEL387 MATH COPROCESSOR RECOGNIZED AS AN INTEL287 MATH COPROCESSOR
FaxBack # 3069.07
On some systems, the Intel Advanced Diagnostics identify an Intel387
Math Coprocessor as an Intel287 Math CoProcessor because the system is
using an old BIOS adapted from a 80286 system. In most cases, you can
ignore this symptom; the math coprocessor runs all floating point
software flawlessly.
SYSTEM INTEGRITY DIAGNOSTIC TEST FAILURE
FaxBack # 3069.08
Some systems with an Intel287 XL Math CoProcessor installed may fail the
Intel Advanced Diagnostics system integrity test. This condition is
caused by a timing problem in all I286 systems.
In addition, this problem can be aggravated by excessive noise of the
system board and can cause the Intel287 XL Math CoProcessor to fail
this test. Replacing the CHMOS 287XL with the less sensitive 287-10 (an
NMOS device) usually resolves the problem.
"CHKCOP HAS FOUND" AND LOCKS UP
FaxBack # 3069.09
When running CHKCOP 2.2, the program may lock up under certain
circumstances. These include:
* A poorly seated chip
* Incorrect dipswitch setting
* A conflict with device drivers and/or TSR's
* A bad chip
If CHKCOP locks up, boot to a DOS disk and re-run CHKCOP.
CHKCOP 2.0 FAILS DIVIDE TEST
FaxBack # 3069.10
If the CHKCOP test program intermittently fails the divide test, there
may be a timing problem with the system board. Intel has confirmed that
Chips & Technologies chip set version 82C211 causes the failure. Version
82C211C of this chip set should work as expected.
The Toshiba T1600 and Dell System 200 both use this chip set. If you
experience this problem, examine the system board to see if your
computer uses the Chips and Technologies chip set.
CHKCOP SEEMS FASTER ON AN INTEL287 MATH COPROCESSOR
FaxBack # 3069.11
You may experience slower execution times when running the CHKCOP test
program after replacing an Intel 80287 Math CoProcessor with an Intel287
XL Math CoProcessor.
This condition is caused because the Intel287 Math CoProcessor supports
trigonometric functions while Intel 80287 Math CoProcessor chips (6, 8,
and 10 Mhz) do not. When testing an Intel 80287 Math CoProcessor,
CHKCOP skips the transcendental test, but executes it when testing an
Intel287 XL Math CoProcessor.
Because CHKCOP runs more tests on the Intel287 XL Math CoProcessor, the
total testing time may be longer than when CHKCOP tests an Intel 80287
Math CoProcessor.
SYSTEM DIAGNOSTICS AND THE INTEL287 XL MATH COPROCESSOR
FaxBack # 3069.12
Several system diagnostic programs have difficulty properly detecting an
Intel287 XL Math CoProcessor. Some programs incorrectly identify the
processor as an Intel387 Math CoProcessor, and other programs simply
fail some or all tests, or lock up during the tests.
The following lists system diagnostic programs that Intel has tested and
their results:
Diagnostic Programs With Recognition Problems
Diagnostic Program Problem System
PC Consultants V2.02 sees 387 Compuadd 216 & 220
NCR User V1.12 sees 387 NCR PC 810
Epson 80287 V2.02 fails Epson Equity II+ & III+
IBM 50/60 Ref V1.04 fails IBM PS/2 mod 50 & 60
IBM Advanced V2.07 fails IBM AT 339 (5170)
IBM Starter/Ref V1.01 fails IBM PS/2 mod 30/286
(E-21)
Diagnostic Programs Without Problems
Diagnostic Program System
Compaq V4.0 Rev A Compaq Portable II
Compaq Advanced V5.06 Compaq Portable III
Compaq V6.10 Rev A Compaq Deskpro 286/12
Epson System V1.01 Epson Equity IIe
Wyse Setup & Test V1.09 Wyse PC 286
INTEL387 DX AND INBOARD INTEL287 MATH MODULE AND IBM ADVANCED DIAGNOSTICS
FaxBack # 3069.13
The Intel387 DX and Inboard 80287 Math Module fail the IBM Advanced
Diagnostics. This happens because the diagnostics reinitialize the
Intel387 DX or Math Module after the Inboard Intel386 CPU has already
initialized it. To test an Intel387 DX or Inboard math module, use the
CHKCOP program on the Inboard 386 diskette instead of the IBM
Diagnostics.
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