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System Update3.3rev03
Technical info
TypeSystem Menu IOS
StatusPrivate Corporate IOS
Stub variant2008

IOS4 was a very primitive IOS that was used by both the Startup Disc Menu and the System Menu used in the factory process. This IOS and the System Menu come preburnt at the factory, before any other discs are inserted.

Like IOS10 and older versions of IOS9, this IOS does not have a build tag.

U.S. update partitions are set to use this IOS in their TMD. Other regions are not yet known.

IOS3 and IOS4 are also the only two IOSes stubbed on the Wii mini, since most IOSes will hang on the Wii mini due to the WiFi module not responding.

The SDK version that uses IOS4 probably only supports 4:3 video; this is evident in the Wii Startup Disc's SDK, which most likely uses IOS4.

Titles using this IOS

Version history

Version Signing bug? /dev/flash access? ES_Identify? STM Release Exploit? Notes
v1 Yes Yes Yes Yes Used by older versions of the Factory System Menu and 0000.
v3 Yes Yes Yes Yes Used in Startup Disc Menu and newer versions of the Factory System Menu. Present on launch-day Wiis.
v259 ? ? ? ? Preinstalled on Korean consoles
v65280 N/A N/A N/A N/A Stub IOS released in 3.3rev03 and 3.5. Probably v65280 because different locations were unaware of the versions of IOS4 released.