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9Running NIC Diagnostics
The 3Com 10/100 PCI (3C990B) NIC uses two types of NIC diagnostics programs: a
Windows-based diagnostics program and a DOS-based diagnostics program.
Use the Windows-based 3Com NIC Diagnostics program if you are running any of the
following operating systems:
Windows 2000
Windows NT 4.0
Windows Me
Windows 98
Windows 95
Use the 3Com DOS Diagnostics program if you are running any of the following operating
systems:
DOS
NetWare
This chapter explains how to:
Run the NIC diagnostic tests.
View the NIC LEDs in the NIC Diagnostics program.
View network statistics.
Use the 3Com icon in the Windows system tray.
Remove the 3Com NIC Diagnostics program.

Running the 3Com DOS Diagnostics Program

To start the 3Com DOS diagnostics program for DOS and NetWare installations:
1Copy 3c99xcfg.exe from the EtherCD to the root directory of a DOS-bootable diskette.
NOTE: Before starting any diagnostics program, close all running applications.
NOTE: The following sections explain how to start both NIC diagnostics programs.
However, specific instructions are provided only for using the Windows-based
3Com NIC Diagnostics program.
CAUTION: If you are running Japanese DOS, you must switch to U.S. mode DOS
before running the 3Com DOS diagnostics program.
NOTE: If you do not have a DOS-bootable diskette, see “Making a DOS-Bootable
Diskette” on page 15 for instructions.