4-2 CHAPTER 4: CHANGING CONFIGURATION SETTINGS
Using the DOS Configuration Program
The configuration section of the DOS diagnostic program is
used to configure the 3C900B NIC when it is installed in a
PC running DOS, Windows 3.x, Windows for Workgroups,
or Windows NT 3.51. To use the configuration portion of
the DOS diagnostic program, see the INSTRUCT.TXT file in
the HELP directory on EtherDisk diskette 1.
Running the 3Com NIC Diagnostics Program
If you are running Windows 95 or Windows NT 4.0, run
the 3Com NIC Diagnostics program to display and change
configuration settings.
The 3Com NIC Diagnostics program is automatically
installed when you install the network driver.

Displaying Configuration Settings

Follow these steps to run the 3Com NIC Diagnostics
program to display the current configuration settings for
the 3C900B NIC:
1 Make sure that the NIC is installed and connected to
the network and the network driver is installed.
2 Double-click the 3Com icon in the system tray.
A warning message appears.
If the 3Com icon has been disabled and is not visible in the
system tray, follow this procedure:
aClick Start in the Windows taskbar.
bSelect Programs, and then select 3Com NIC Utilities.
cClick 3nicdiag.
A warning message appears.
The 3Com NIC Diagnostics General screen appears, as
shown in Figure 4-1.