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I/O Controller

The I/O controller IC in the PowerBook computer is a custom IC called KeyLargo. It provides the interface and control signals for the following devices:

• the internal hard drive
• a storage device (such as the DVD-ROM drive) in the expansion bay
• the USB ports
• the built-in modem
• the sound codec IC
• the power manager IC
• the infrared link
• the optional wireless LAN module

DMA Support

Interrupt Support

USB Interface

Ultra DMA Interface

EIDE Interface

Modem Support

Sound IC Support

Power Controller

Infrared Link Interface

AirPort Card Interface

CardBus Controller IC