The Hollywood includes an ARM9 core to handle I/O and security, nicknamed the Starlet. This is a very interesting piece of hardware, as it basically does everything that makes a Wii different from a GameCube.
Note: this page is incomplete. Please expand it as you see fit!
- NEC ARM SoC. Might be this ARM946E core. See also ChipWorks.
- AES and SHA-1 hardware engines
- Boot ROM
- OTP key/hash area
The Starlet handles at least these tasks in the Wii
- NAND access / filesystem
- DVD subsystem
- Authentication (RSA, EC, SHA1, HMAC-SHA1) and encryption/decryption (AES, RSA, EC)
- USB HCD (generic USB interface), Keyboard driver, Ethernet driver
- WiFi (both for networking and communication with Nintendo DS devices)
- TCP/IP and UDP
- SD card
- GPIO (Sensor bar, drive LED, power LED, etc)
- Audio/Video encoder (I2C) bus
Starlet is the first processor to run code in the Wii.
- Starlet boots from an internal Mask ROM, BOOT0 (about 1300 bytes of code out of 4K possible)
- BOOT0 decrypts, verifies, and runs the first few blocks of NAND, BOOT1 (up to the first 48 pages of flash)
- BOOT1 locates, loads, decrypts, verifies, and runs BOOT2
- The BOOT2 bootstrap then loads the embedded ELF file.
- BOOT2 starts the IOS.
At some point, Starlet loads code into an EXI buffer and bootstraps Broadway.
More information about the Starlet: