PATHADC Home > Documentation > Hardware > Power Mac G4 Developer Note

     

---

KeyLargo I/O Controller

The KeyLargo custom IC is the third major component of the architecture. It provides all the I/O functions except Ethernet and FireWire. The KeyLargo IC provides two USB root hubs, an Ultra DMA/66 interface, an EIDE interface, and support for the communication slot and the sound IC.

DMA Support

Interrupt Support

USB Interface

Ultra DMA/66 Interface

Enhanced IDE Interface

Modem Slot Support

Wireless LAN Module

Sound Circuitry

Power Controller