[Intel Navigation Header]

    MCP INSTALLATION TROUBLESHOOTING: DIAGNOSTIC FAILURES

    Contents:

    • MCP INSTALLATION TROUBLESHOOTING: DIAGNOSTIC FAILURES
    • USING CHKCOP 2.2 TO TEST YOUR MATH COPROCESSOR
    • TROUBLESHOOTING A DIAGNOSTIC FAILURE AFTER INSTALLING AN INTEL MATH COPROCESSOR
    • TROUBLESHOOTING AN ARITHMETIC TEST FAILURE
    • TROUBLESHOOTING AN ENVIRONMENT TEST FAILURE
    • INTEL DIAGNOSTICS CONFORMANCE TEST FAILURE WITH INTEL387(TM) SL MATH COPROCESSOR
    • INTEL387 DX MATH COPROCESSOR RECOGNIZED AS AN INTEL287TM XL MATH COPROCESSOR
    • INTEL387 MATH COPROCESSOR RECOGNIZED AS AN INTEL287 MATH COPROCESSOR
    • SYSTEM INTEGRITY DIAGNOSTIC TEST FAILURE
    • "CHKCOP HAS FOUND" AND LOCKS UP
    • CHKCOP 2.0 FAILS DIVIDE TEST
    • CHKCOP SEEMS FASTER ON AN INTEL287 MATH COPROCESSOR
    • SYSTEM DIAGNOSTICS AND THE INTEL287 XL MATH COPROCESSOR
    • INTEL387 DX AND INBOARD INTEL287 MATH MODULE AND IBM ADVANCED DIAGNOSTICS
    
    

    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.
    
    

    Trademark information