The CPU is a 600Mhz Intel IOP 80219, a little endian arm cpu based on the Intel XScale core.

• 600Mhz Xscale (ARMv5TE instruction set)
• upto 1GB of 64bit DDR RAM, and 512MB with 32bit addressing.
• 32KB data/instruction caches
• 64-bit PCI 2.2 Interface
• 8 GPIO Pinouts?

See: http://www.intel.com/design/iio/80219.htm