INSTRUCT.TXT File
3Com Corporation
3Com Megahertz 10/100 LAN CardBus PC Card
Configuration and Diagnostic Program Information


Overview
--------
Your notebook containing the PC Card must be
running DOS or DOS-mode only to use this program.

The configuration portion of the Configuration and 
Diagnostic Program allows you to change the 
configuration parameters for the PC Card 
to fit the your networking and notebook set up.

The diagnostic portion of the Configuration and 
Diagnostic Program verifies that the PC Card 
is installed correctly and functioning properly 
in your notebook.  The basic tests check the
physical components,connectors, and circuitry 
of the PC Card and require that the PC Card be 
installed in the your notebook.  

The Echo tests check the PC Card's ability 
to transmit data on the network and
require that the Pc Card be connected 
to a network.


Running DOSDIAG.EXE Using Windows 95 or Windows 98

You must run DOSDIAG.EXE from a DOS or DOS-mode 
command prompt.

1.  Restart the notebook.  

2.  Upon restart, immediately press the <F8> key.  

3.  At the menu, choose "Safe Mode Command Prompt Only" 
    (usually #7)

    If you decide to run DOSDIAG.EXE from Windows 95, 
    use it only to read the documentation. 
    Do not use it to configure the PC Card or to run 
    COMSLINK.EXE.  


Configuring the PC Card
-----------------------
The PC Card can be configured in either  
windows mode or command line mode.

To start the Configuration And Diagnostic program
in windows mode:

1.  Insert the LAN Installation Disk.

2.  Type DOSDIAG.EXE at the DOS prompt and  
    select Configuration and Diagnostic Program 
    on the main menu.

3.  Select the Configure Adapter option in the Configuration 
    and Diagnostic menu.

4.  Change the values and exit the program.



Command Line Mode
-----------------

The command keywords and parameters are not case-sensitive; 
For example: CONFIGURE, configure, and Configure, all work.

While Command Line Parameters are included here for 
completeness, use of the Command Line Mode may produce 
unpredictable results.


Command Line with Explicit Parameters
-------------------------------------

Command syntax:  DOSDIAG CONFIGURE  [ /AUTO /IOBASE:N /INT:N
                 /OPTIMIZE:N /LINKBEAT:N /TOSHIBA:N ]

Each parameter must have the structure "/keyword:value" and
contain no blank spaces.  For example: /iobase:300 /int:3

Command line configuration parameters are used to 
configure the PC Card using only the option settings 
you specify.  In most cases, any combination of 
parameters can be used. You can modify only a
few settings if needed.


/AUTO
The /AUTO parameter configures the PC Card 
automatically based on the software's best estimate 
using interpreted system information.

/IOBASE           
I/O Base Address  
Possible values - 3000,3040,3080,30C0,3100,3140,3180,31C0
                  3200,3240,3280,32C0,3300,3340,3380,33C0
                  3400,3440,3480,34C0,3500,3540,3580,35C0

/INT           
Interrupt Level  
Possible values - 5,7,9,10,11,12

/OPTIMIZE 
Network Driver Optimization
Possible values - NORMAL (DOS), MAXIMIZED (Windows environment)
                  MIMIMIZED (Server).  Default is Maximized.

/LINKBEAT
Link beat disable/enable (pre-10BASE-T standard only)
Possible values - ENABLE, DISABLE
            
NOTE:  Try this setting ONLY if pre-10BASE-T standard hubs
       are in use.

/TOSHIBA
Toshiba Burst mode disabled or enabled
Possible values - BURST, NOBURST
If you are using an older Toshiba notebook, 
using /TOSHIBA: NOBURST may increase performance.


Diagnostic
----------

The diagnostic tests are only available in full-screen mode.

1.  To run the diagnostic tests, enter:

    DOSDIAG 

2.  Select Configuration and Diagnostic Program 
    on the main menu.
3.  Select the Diagnostic Tests option on the 
    Configuration and Diagnostic menu.
4.  Follow the instructions to run the tests.



Further Assistance
------------------
If the PC Card fails any of the diagnostic tests, 
see the TROUBLE.TXT file in the \HELP directory 
on the LAN Installation Disk for troubleshooting
procedures.

The SUPPORT.TXT file in the \HELP subdirectory 
on the LAN Installation Disk provides information 
about obtaining product support for the adapter.

3Com and Megahertz are registered trademarks of 3Com
Corporation.  All other trademarks are the property 
of their respective owners.


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