Compaq AlphaServer GS60 Operation Manual page 149

The I/O channel lines (C0, C1, C2, ...) indicate the:
•
I/O channel that connects the I/O adapter bus to the system bus
•
DWLMA adapter self-test results
•
XMI adapters' self-test results
•
PCI adapters' self-test results
•
Internal PCI self-test results
•
FBUS+ adapters' self-test results
A + indicates an adapter passed self-test, a – indicates a failure, and a period (.)
indicates that that node number is not used.
In Example 6-7, the internal PCI (channel C0) and its options at nodes 0, 1, 2, 4,
5, 6, and 7 passed self-test as indicated by the + symbols.
The DWLAA adapter accessed through C1 failed self-test (C2 FBUS–).
The DWLMA adapter accessed through C4 failed self-test (C0 XMI –).
I/O channels C5 and C6 are not used in this system configuration.
The PCI connected to channel C7 passed self-test as indicated by the + symbol.
The two EISA adapters at nodes 1 and 2 passed self-test.
The show configuration command gives additional information on I/O subsystems
and adapters (see Section 6.16 and Section 7.5.25).
System Troubleshooting 6-27