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System Update2.0
Technical info
TypeCommon IOS

IOS12 is an IOS that was previously thought to be the oldest,[1] but that was due to an outdated build date of June 4, 2006, probably from IOSP.

IOS12v6 is most likely a copy of IOS11v6, since both IOS11 and IOS12 have NCD modules that use /shared2/sys/net/02/config.dat, while IOS5 is known to have an NCD module that uses /shared2/sys/net/config.dat due to the code responsible for deciding on the config file using the latter on every IOS before IOS11.

The SDK version built for IOS12 only supports 4:3 video.

Titles using this IOS

  • Elebits

Version history

Version Signing bug? /dev/flash access? ES_Identify? STM Release Exploit? STM IOCTL overflow? SDI register index bug? Notes
v5 Yes Yes Yes Yes Yes Yes Installed on an RVT-R Reader at the factory. Only known to exist because the /meta entry was not deleted.
v6 Yes Yes Yes Yes Yes Yes First release. 2.0 update.
v11 No No No Yes Yes Yes
v12 No No No No Yes Yes
v269 No No No No No Yes
v525 No No No No No No
v526 No No No No No No
v782 No No No No No No Only found on vWii and newer RVL-101 units.
v26382 No No No No No No Only found on Wii mini


1. "IOS: history, build process" on HackMii