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Uni-N Bridge and Memory Controller

The Uni-N custom IC is at the heart of the Power Mac G4 computer. It provides the bridging functionality between the processor, the memory system, the PCI-based I/O system, the AGP graphics slot, and the FireWire and Ethernet interfaces.

Processor Bus

Main Memory Bus

Accelerated Graphics Port Bus

PCI Bus

Boot ROM

Ethernet Controller

FireWire Controller