Service manual

1-30 AlphaServer GS80/160/320 Service Manual
1.8.5 PCI Backplane Manager (PBM)
In addition to configuring and monitoring the PCI I/O subsystem, the
PCI backplane manager (PBM) performs tasks at the request of the
system control manager (SCM). The PBM is a microprocessor
controlled subsystem responsible for PCI environmental monitoring,
notifying the system of unsafe conditions, PCI test, reset, and
initialization. The PBM is on the PCI backplane.
Figure 1– 14 PCI Backplane Manager Block Diagram