C.1.12.3 PCIO

The PCI-to-EBus/Ethernet controller (PCIO) ASIC performs dual roles: PCI bus-to-Ebus bridging and Ethernet control. The PCIO ASIC provides the electrical connection between the PCI bus and all other I/O functions. In addition, the PCIO ASIC contains an embedded Ethernet controller to manage Ethernet transactions and provides the electrical connection to slower on-board functions, such as the flash PROM and the audio module.