Chips, Chips, Chips. Here's some of the salsa on the non-A5X side of the logic board:

Texas Instruments CD3240 driver device

Broadcom BCM4330 802.11a/b/g/n MAC/baseband/radio with integrated Bluetooth 4.0+HS and FM transceiver

2 x 4Gb Elpida LP DDR2 = 1 GB DRAM in separate packages in a 64-bit configuration

Fairchild FDMC 6683

Broadcom BCM5973 I/O controller

Broadcom BCM5974 microprocessor

Apple 338S0987 (Cirrus Logic audio codec)