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Technical info
TypeSystem Menu IOS

IOS4 was a very primitive IOS that was probably used during the manufacturing process. Consoles requiring the Wii Startup Disc also use IOS4 as the System Menu IOS.

Version Signing bug? STM Release Exploit? Notes
v1 Yes ? Remnants of this Version were found in the 'Wii Startup Disc' NAND.
v3 Yes ? Initial release. Present on Wiis with the 'Prelaunch/Wii Startup Disc' system menu.
v259 N/A N/A Stub IOS found on Korean consoles.
v65280 N/A N/A Stub IOS released alongside October 23rd Wii Shop Channel update.