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Technical info
TypeCommon IOS

IOS55 is an IOS that some games starting in late 2008 use. v4633 is identical to IOS51v4633, probably to allow IOS51 to be updated without compatibility issues, although in reality, IOS51 was immediately stubbed.

Titles using this IOS

The full list is much longer than this.

  • Call of Duty: Modern Warefare - Reflex Edition
  • The Conduit
  • Donkey Kong Jungle Beat (New Play Control)
  • Excite Bots
  • Need for Speed: Undercover
  • Sonic and the Black Knight
  • Wii Sports Resort
  • Internet Channel

Purpose and anti-piracy

This IOS is presumably required by NfS: Undercover to make a Logitech USB steering wheel work. However, this does not explain why the other games require it although, in the case of The Conduit, it is possible that there is a connection between its usage and support for the Wii Speak peripheral (it has been reported that both IOS38 and IOS55 are required by the official Nintendo Wii Speak channel).

Typically, if a game that requires this IOS is started without it (via brickblocker or a Starfall update skip, for example), then the screen will turn blue and a white-text error message Error 002 will appear. The Conduit behaves somewhat differently as it will simply display a black screen before freezing.

Version history

Version Signing bug? /dev/flash access? ES_Identify? STM Release Exploit? STM IOCTL overflow? SDI register index bug? Notes
v4633 No No No Yes Yes Yes First release
v5149 No No No No Yes Yes
v5406 No No No No No Yes
v5662 No No No No No No
v5663 No No No No No No Updated WL (4.3rev03)
v5919 No No No No No No Only found on vWii and newer RVL-101 units.
v31519 No No No No No No Only found on Wii mini