A pluggable port adapter is used for connecting PCI devices to a host system through a PCI local bus while also adding functionality to the host system. The port adapter communicates with the host system through a port adapter/host interface that includes the PCI local bus and an auxiliary bus. The auxiliary...http://www.google.ca/patents/US6163824?utm_source=gb-gplus-sharePatent US6163824 - Hot plug port adapter with separate PCI local bus and auxiliary bus
