The Wii's hardware is one of the most well-understood of any home console. Due to extensive research in the homebrew community, the Wii's inner workings have been reverse-engineered and have been exploited heavily in the usage of homebrew.
The Wii has two processors. The main processor of the Wii's system, codenamed Broadway, which is a PowerPC processor that does the job of running executable code, and interfacing with legacy hardware, which includes every aspect of the Gamecube's system, with a few exceptions, which are handled by the PowerPC. The Broadway is also called the PPC, because that is its architecture.
The other processor is nicknamed the Starlet chip, due to the fact that it lives inside the Hollywood graphics processor. The Starlet is an ARM processor that communicates with hardware, as well as the DVD drive. The program that handles communication between the PPC and the hardware is known as IOS, and exists for security.
NAND is the term for the Wii's internal flash memory, which is based on a NAND flash.
Nintendo Wii Hardware Summary
- CPU: IBM PowerPC 729 MHz
- GPU: ATI graphics 243 MHz
- 3 MB embedded memory
- NEC ARM9 243 MHz
- 512 MB Internal Flash Memory (NAND)
- 88 MB Main Memory
- 24 MB "internal" 1T-SRAM
- 64 MB "external" GDDR3 SDRAM
- 12 cm optical drive
- Wi-Fi 802.11b/g
- Mitsumi DWM-W004
- 2x USB 2.0
Some hi-resolution board scans by bushing: