System update

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A system update is a collection of updated titles installed via the “Wii System Update” feature, either from a disc or over the network. The System Menu is typically updated, along with certain IOSes, and sometimes some channels.

While system updates are generally referred to by version, the Wii does not store a firmware version anywhere, besides the System Menu version, although not all system updates come with a System Menu (for example, the Oct. 23 Update).

The first title to be updated in each update is boot2, whose contents are instead passed to ES_ImportBoot, in an attempt to safely update both copies of boot2. After this, the System Menu IOS is installed, followed by the System Menu itself. The rest of the updated titles are simply updated in the order they are found.

Online updates

The most common method of installing an update is by pressing the update button in the settings. When doing this, the System Menu takes the version number of boot2, the System Menu, and a single IOS, and uploads them to NUS. NUS then returns the latest version of al title.

From here, the System Menu downloads each ticket and TMD from NUS that has a later version than the version installed, or is not installed, as well as the contents listed in the TMD. These are fed to ES and installed.

Disc updates

When a disc is inserted, one thing the System Menu checks is whether any titles in the update partition have a version higher than the one on the NAND; if so, the "Wii System Update" banner is displayed on the Disc Channel instead of the normal banner (only on 3.2 and higher).

When the Disc Channel is clicked, a prompt to update appears. For each title with a version number higher than that on the NAND, and each title that does not already exist on the NAND, the title contents are fed to ES's title installation ioctls.

vWii updates

On the vWii, updates are done together with Wii U updates. The upper bits of the title IDs are modified to distinguish from Wii titles, which prevents things like BC-NAND from appearing on the normal Wii. This mapping is only done on NUS; the actual titles are still installed into the normal locations in the vWii.

00000007 00000001
00070002 00010002
00070008 00010008

Update history

Version NUS post date Release date Description
1.0 N/A November 19, 2006 Launch set of titles. Contains boot2v2, System Menu 1.0, IOS4v3, IOS9v516, BC, MIOS, Photo Channel, Mii Channel, Forecast Channel dummy, and News Channel dummy. Some consoles shipped with a functioning Wii Shop Channel, while others had a dummy version.
2.0 November 17/18, 2006 November 19, 2006 Removed setup features intended for initial setup prior to formatting. Activated online features; added release IOSes ([[IOS11], IOS12, IOS13). Updated BC and MIOS.
2.0rev02 November 17/18, 2006 November 19, 2006 Installed a functional Wii Shop Channel on Wiis that didn’t have it; updated several channels to use IOS13. Changed Forecast Channel dummy and News Channel dummy to say "You cannot use this channel until service begins." Added EULA, which the Wii Shop Channel now requires agreement to.
2.0rev03 November 30, 2006 November 30, 2006 Wii Shop Channel now uses HTTPS, and uses the newly released IOS15.
2.0rev04 December 19, 2006 December 19, 2006 Released the Forecast Channel
2.0rev05 January 26, 2007 January 26, 2007 Released the News Channel
2.1 January 10, 2007 January 10, 2007 PAL-exclusive RGB-SCART fix.
2.1rev02 January 26, 2007 January 26, 2007 Identical to 2.0rev05; released News Channel in PAL consoles.
2.2 April 12, 2007 April 11, 2007[check] Fixed some internet issues. Released IOS20 and IOS21.
3.0 August 7, 2007 August 6, 2007[check] Contains various minor updates such as a clock and using + and - to navigate the settings menu. Blocked the GameCube Action Replay with an updated MIOS. Released IOS30 and IOS31, which have the code needed for games to detect drivechips and show error 001. Updated the Internet Channel using a NAND Boot Program update in IOS15 and IOS21. Added a switch to detect whether to use Photo Channel or Photo Channel 1.1 instead of displaying both.
3.0rev02 August 13, 2007 August 13, 2007 Reverted the Internet Channel patch; updated IOS30 and IOS31.
3.1 October 10, 2007 October 10, 2007 Added USB Keyboard support; added back the Internet Channel patch. Reverted setup back to a 1.0-like setup process to allow this menu to be preinstalled at the factory. Added IOS33, IOS34, and IOS35, the first IOSes used by error 001 games.
3.1rev02 December 7, 2007 December 10, 2007 Added Photo Channel 1.1 and added the gift feature to the Wii Shop Channel.
3.2 February 26, 2008 February 25, 2008[check] The Disc Channel now says "Wii System Update" if an update is needed; something about slot LED blinking was also changed.
3.2rev02 March 20, 2008 March 20, 2008 The Wii Shop Channel now supports WiiWare.
3.2rev03 March 21, 2008 March 22, 2008 Added IOS37, used by early WiiWare games. This IOS fixed the signing bug, but this did not have much of an impact.
3.2rev04 June 13, 2008 June 16, 2008 Released an updated IOS30 with the signing bug fixed.
3.3 June 13, 2008 June 16, 2008 Copied the IOS30 signing bug fix to IOS31; fixed the signing bug in BC. Fixed the Tweezer Attack and attempted to fix the Twilight Hack.
3.3rev02 July 17, 2008 July 22, 2008 Updated Photo Channel and Photo Channel 1.1 for a Japan-exclusive service
3.3rev03 October 22, 2008 October 23, 2008 Stubbed IOS4, IOS10, IOS11, and IOS20. Fixed signing bug, /dev/flash hack, and ES_Identify in all IOSes except IOS16, IOS30, IOS31, IOS37, and IOS254. Released IOS51 with a new Wii Shop Channel.
3.4 November 17, 2008 November 17, 2008 System Menu now uses IOS50; IOS30 has been stubbed. Fixed ES_Identify and /dev/flash hack in IOS31, IOS37, and IOS254. IOS37 now has new ES functions. Supposedly has disc and SD reading improvements as well. Second attempt to fix the Twilight Hack. Mii Channel now has USB Keyboard support.
3.4rev02 March 25, 2009 March 25, 2009 Fixed STM Release Exploit in all IOSes. Stubbed IOS16; released IOS60 and IOS61.
3.5 March 2, 2009 March 3, 2009 Korean equivalent of 3.4, and the first update to Korean consoles. Stubbed IOS4 and IOS40. System Menu now uses IOS52. Released IOS51.
3.5rev02 March 25, 2009 March 25, 2009 Korean equivalent of 3.4rev02.
3.5rev03 March 25, 2009 March 25, 2009 Korean equivalent of 4.0; System Menu was never released in Korea.
4.0 March 25, 2009 March 25, 2009 Fixed the Twilight Hack. Added an SD card menu, as well as SDHC support in system channels. Made various improvements to initial setup. Rephrased the warning about homebrew when updating. Removed unused symbols from main.sel.
4.1 July 16, 2009 July 15, 2009[check] Fixed a bug where using the SD Card Menu would force users to rewatch the MotionPlus introduction. Released Photo Channel 1.1 in Korea.
4.1rev02K July 30, 2009 July 30, 2009 Korea only; stubbed IOS16 and IOS52.
4.2 September 29, 2009 September 30, 2009 Updated to boot2v4; contains an unknown batch IOS update, including BC and MIOS. System Menu now uses IOS70. Attempted to fix Bannerbomb. Added code to delete the Homebrew Channel and DVDX on every boot.
4.2rev02 September 29, 2009 September 30, 2009 Stubbed IOS60.
4.2rev03 October 20, 2009 October 21, 2009 Updated the Wii Shop Channel to add the "One Free Title" button for users that purchased the Internet Channel.
4.2rev04 June 21, 2010 June 22, 2010 Batch IOS update to fix the HackMii Installer exploit and the /tmp/title.tmd bug. Released IOS80. IOS9 now has a build tag. Removed the NAND Boot Program from IOS15.
4.3 June 21, 2010 June 22, 2010 Successfully fixed Bannerbomb. Updated the title deletion code for the new title IDs used by homebrew. Initial setup date now defaults to 1/1/2010 instead of 1/1/2009.
4.3rev02 June 22, 2010 June 22, 2010 Stubbed IOS70 and IOS254.
4.3rev03 September 7, 2010 September 8, 2010 Updated WL in all IOSes except IOS9. Korean IOSes have now been released in all regions. Wii Shop Channel now uses IOS56 instead of IOS61.
4.3rev04 November 7, 2012 November 6, 2012[check] Added IOS62 for Wii U Transfer Tool support.
4.3rev05J November 26, 2013 November 26, 2013 Updated IOS59 for a new Dragon Quest X update.
4.3rev06J February 25, 2014 February 25, 2014 Updated IOS59 for USB Flash Optimization support.