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Technical info
TypeCommon IOS

IOS21 is most commonly used by third-party games. It also contains some PowerPC binary in content 1, identical to the one in IOS15. Most debugging messages have been removed, though.

It probably had the connection fixes advertised for 2.2. Many games such as Wii Sports were also rereleased under this IOS with a newer strap screen, probably in response to TVs getting smashed.

This IOS was used by older versions of DataChk, a factory title.

Version history

Version Signing bug? /dev/flash access? ES_Identify? STM Release Exploit? Notes
v512 Yes Yes Yes Yes Lowest version released, but not the first release. Released on Mario & Sonic at the Olympic Games in November 2007.
v514 Yes Yes Yes Yes
v515 Yes Yes Yes Yes
v516 Yes Yes Yes Yes
v517 Yes Yes Yes Yes First release; 2.2 update
v522 No No No Yes
v525 No No No No
v782 No No No No
v1038 No No No No
v1039 No No No No
v1295 No No No No Only found on vWii and newer RVL-101 units.
v26895 No No No No Only found on Wii mini