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98 CHAPTER 6: TROUBLESHOOTING
Using the Diagnostic Program
You can troubleshoot the 3C359B NIC configuration and
test for physical board problems by running the DOS
Configuration and Diagnostic Program.
Configuration instructions are described in Appendix B.
The diagnostic part of the program tests the 3C359B NIC, not
the network. However, a lobe cable must be connected from
the 3C359B NIC to a retiming concentrator or MAU for all
tests. A lobe cable is the section of cable that attaches a ring
station or network device to a MAU or wiring hub.
The diagnostic program does not function properly if the
3C359B NIC drivers are already installed and running in
memory. You must bypass the drivers by performing a clean
DOS boot before you run the diagnostic program. Use a
DOS diskette if you are running a version of DOS earlier
than DOS 6.x.
DOS Diagnostic Tests
The diagnostics test physical components, connectors, and
circuitry of the 3C359B NIC, as follows.
Register Write/Read Test
This test verifies accurate writing and reading of the
3C359B NIC’s control registers.
Local RAM Write/Read Test
This test verifies that the PC can correctly access the total
64 KB of available local RAM.
Timer Test
This test verifies the 3C359B NIC’s timer operations by
comparing the 3C359B NIC’s timers to the PC’s timer.
Open NIC for Ring Operation Test
This test prepares the 3C359B NIC for a NIC ring operation
test and verifies the 3C359B NIC’s ability to transmit and
receive data over the network. This test requires you to
connect to an STP or a UTP cable with a DAU, MAU, CAU,
or token ring switch at the other end.