boot2
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boot2 is the Wii's third-stage bootloader. It is responsible for loading the System Menu TMD and loading the appropriate IOS.
There are two copies of boot2 housed in NAND blocks 1-7 in case of failure, loaded by boot1. Additionally, a copy of boot2 exists as title 1-1 in the NAND filesystem.
Version history
| Version | Description |
|---|---|
| v1 | Present on Prelaunch consoles. |
| v2 | Present on launch-day Wii's. |
| v3 | Only found in Wiis released before LU64+ that were not updated to 4.2. Fixes the signing bug in the unused signature check code, and supports the next Hollywood revision. |
| v4 | Packaged in the 4.2 update to erase BootMii as boot2. Also found preinstalled in LU64+ Wiis. Contains a different layout to break the HackMii Installer. |
| v5 | Only found on Arabian Wiis, certain RVL-101 Wiis and the Wii Mini. |