PATHDocumentation > Hardware > iBook Developer Note

     

Microprocessor and Cache

The microprocessor communicates with the rest of the system by way of a 66-MHz, 64-bit 60x bus to the Uni-N IC. The backside cache is built into the microprocessor.

G3 Microprocessor

The current family of PowerPC microprocessor designs is called "G3," for "generation three." The microprocessor used in the iBook is a PowerPC 750CX microprocessor. It has several features that contribute to improved performance, including:

The PowerPC 750CX microprocessor in the iBook runs at a clock speed of 366 or 466 MHz.

Backside (L2) Cache

The data storage for the L2 cache consists of 256 KB of fast static RAM that is built into the microprocessor chip along with the cache controller. The built-in L2 cache runs at the same clock speed as the microprocessor.


© 2000 Apple Computer, Inc. – (Last Updated 07 Sep 00)