IOS History

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This page is intended to track changes in IOS ( the operating system that runs on Starlet) such as: added features, bug fixes, etc. It will also cover what different minor versions are known to exist.


The Title ID of the IOSes follow this convention "00000001-000000xx" where xx is the IOS number in hexadecimal. The "IOS number" is best thought of as a "Major" version number for the firmware, and probably corresponds to a specific version of Nintendo's (proprietary) SDK -- for example, the version of the SDK used to compile Zelda: Twilight Princess probably was tailored to run on IOS9.

In general, IOSx0 is used for the system menu (IOS20, IOS30, IOS40, IOS50, IOS60, IOS70). IOSx1 seems to be used for Nintendo channels (e.g. IOS31, IOS51, IOS61).

Each IOS has a 16-bit "version number" in its TMD; this version number is seen in decimal form in the filenames of IOS WADs on update partition (e.g. "IOS9-64-v516.wad" for version 516 (decimal)). Converted to hex, that 516 becomes 0x0204, and can be read as "2.4" -- IOS9, version 2.4.

As a rule, an existing IOS will never have new features added to it, to protect binary compatibility. This means that any updates for existing IOSes are only meant to fix bugs -- generally, security bugs.

Future of IOS

As of late 2008, Nintendo has been replacing some versions of IOS with small non-functional "place holder" IOSes. This is to prevent the reuse of the IOS "slot" for software other than official Nintendo Software which utilized that IOS number. Nintendo can come back at a later date if necessary and "reuse" an IOS slot at their own discretion by simply increasing the version number of the title and replacing it with a functional IOS once again. These IOSes have been marked as "Mothballed" on the table denoting that they could quite possibly be reused in the future if Nintendo decides to do so.

Version Table

IOS Number Minor(s) Version Number(s) Notes NUS Availability Status
IOS3 255.0 v65280 Non-functional "stub" Unavailable Mothballed
IOS4 0.3, 1.3, 255.0 v3, v259, v65280 Previous versions only had minimal drivers (lacking KD, WL, WD, SSL), and were probably used during manufacturing and/or updating. 1st Version Timestamp is Aug 10, 2006. Replaced by a stub. v65280 Mothballed
IOS9 2.4, 2.6, 2.8, 2.9 v516, v518, v520, v521, v778 Has only one LED pattern: blinking. First "normal" IOS version. Used by System Menu 1.0. v520, v521, v778 Active
IOS10 3.0 v768 First "stub" IOS. Origin of the shared contents used by all subsequent "stub / mothballed" ioses. v768 Mothballed
IOS11 0.10, v1.0 v10, v256 Internal timestamp says Nov 14 2006 16:26:01. Used by System Menu 2.0. v10, v256 Mothballed
IOS12 0.6, 0.11, 0.12, 1.13 v6, v11, v12, v269 Earliest Known IOS: June 4, 2006. v6, v11, v12, v269 Active
IOS13 0.10, 0.15, 0.16, 1.11 v10, v15, v16, v273 Used by the "All Regions" title of News, Weather & Photo 1.0 Channels v10, v15, v16, v273 Active
IOS14 1.1, 1.6, 1.7, 2.8 v257, v262, v263, v520 v262, v263, v520 Active
IOS15 1.1, 1.2, 1.3, 1.4, 1.9, 1.10, 2.11 v257, v258, v259, v260, v265, v266, v523 Contains NAND BOOT PROGRAM (AKA NANDloader) -- this was probably accidental v257, v258, v259, v260, v265, v266, v523 Active
IOS16 1.1, 2.0 v257, v512 Initially used for Wii Backup Disc. The version on the Wii Backup Disc was infamously used by pirates, until System Menu 4.0 mothballed this IOS as of v512. The mothballed stub version was retracted from the Korean SOAP server not long after its posting for unknown reasons. As of the System Menu 4.1 update for Korea, it is back. v512 Mothballed
IOS17 2.0, 2.5, 2.6 v512, v517, v518, v775 v512, v517, v518, v775 Active
IOS20 0.12, 1.0 v12, v256 Feb 22 2007 04:25:59 Used by System Menu 2.2. v12, v256 Mothballed
IOS21 2.2, 2.5, 2.6, 2.7, 2.10, 2.13 v514, v515, v516, v517, v522, v525, v782 Contains NAND BOOT PROGRAM. Most debugging messages are removed. Most common for third-party titles. v514, v515, v516, v517, v522, v525, v782 Active
IOS22 3.4, 3.9, 3.10, 4.13 v772, v777, v780, v1037 v777, v780, v1037 Active
IOS28 5.8, 5.12, 5.13, 6.14 v1288, v1292, v1293, v1550 Starting with IOS28, firmware is divided into 15 modules. Added some ioctls to /dev/es. v1292, v1293, v1550 Active
IOS30 4.13, 4.15, 4.16, 10.16, 11.0 v1037, v1039, v1040, v2576, v2816 Added USB Keyboard support. Used by many previous versions of the System Menu. v1037, v1039, v1040, v2576, v2816 Mothballed
IOS31 4.13, 4.15, 4.16, 10.16, 12.16, 12.20, 13.21 v1037, v1039, v1040, v2576, v3088, v3092, v3349 Used by News/Weather/Photo 1.1 channel v1037, v1039, v1040, v2576, v3088, v3092, v3349 Active
IOS33 4.16, 11.14, 11.16, 12.19 v1040, v2832, v2834, v3091 v1040, v2832, v2834, v3091 Active
IOS34 4.15, 12.15, 12.19, 13.20 v1039, v3087, v3091, v3348 v1039, v3087, v3091, v3348 Active
IOS35 4.16, 12.16, 12.20, 13.21 v1040, v3088, v3092, v3349 Used by: Super Mario Galaxy, Wii Music, and much more. v1040, v3088, v3092, v3349 Active
IOS36 4.18, 12.18, 12.22, 13.23 v1042, v3090, v3094, v3351 Used by: Super Smash Bros. Brawl, Mario Kart Wii, Castlevania Judgement. v1042, v3090, v3094, v3351 Active
IOS37 8.22, 14.25, 14.28 v2070, v3609, v3612, v3869 First to fix the signature-checking function bug v2070, v3609, v3612, v3869 Active
IOS38 14.19, 14.20 v3609, v3610, v3867 Introduced with Animal Crossing: City Folk. v3610, v3867 Active
IOS40 9.17, 11.19, 12.0 v2321, v2835, v3072 Present in Korean system. v3072 Mothballed
IOS41 9.16, 11.19, 12.19, 13.20 v2320, v2835, v3091, v3348 Present in Korean system. v2835, v3091, v3348 Active
IOS43 9.16, 11.19, 12.19, 13.20 v2320, v2835, v3091, v3348 Present in Korean system. v2835, v3091, v3348 Active
IOS45 9.16, 11.9, 12.19, 13.20 v2320, v2835, v3091, v3348 Present in Korean system. v2835, v3091, v3348 Active
IOS46 9.18, 11.11 v2322, v2837, v3093, v3350 Present in "Need for Speed Undercover" and in "Shin Chuukadaisen" Korean. v2837, v3093, v3350 Active
IOS50 19.25, 20.0 v4889, v5120 Came with the November 17, 2008 update. Used by System Menu 3.4. v4889, v5120 Mothballed
IOS51 18.25, 19.0 v4633, v4864 Used by a previous Shop Channel. Released at same time as fixes to remaining fakesigning bugs. v4633, v4864 Mothballed
IOS52 22.29, 23.0 v5661, v5888 Included with and used by System Menu 3.5 for Korean Wiis. v5661, v5888 Mothballed
IOS53 16.17, 20.29, 21.30 v4113, v5149, v5406 Required for many WiiWare titles. v4113, v5149, v5406 Active
IOS55 18.25, 20.29, 21.30 v4633, v5149, v5406 Seems to have changes in the DI Module. Required for many WiiWare titles. v4633, v5149, v5406 Active
IOS56 19.26, 20.26, 21.29 v4890, v5146, v5405 Used by the Wii Speak Channel 2.0 and some games. v4890, v5405 Active
IOS57 21.51, 22.29, 23.30 v5404, v5661, v5918 Contains new or updated modules "OHCI0 USB USB_HID USB_HUB USB_MSC USB_VEN ETH" v5404, v5661, v5918 Active
IOS58 23.30, 24.31 v5918, v6175 Comes with the game "Your Shape" to allow the USB camera to work. v6175 Active
IOS60 24.30, 25.0 v6174, v6400 Used by System Menu 4.0 and System Menu 4.1 v6174, v6400 Mothballed
IOS61 19.26, 21.29, 22.29 v4890, v5405, v5661 Used by the Wii Shop Channel update that came with System Menu 4.0, 4.1 and 4.2 Also used by Photo Channel 1.1 v3+ v4890, v5405, v5661 Active
IOS70 26.31, 27.00 v6687 Used by System Menu 4.2 v6687 Mothballed
IOS80 27.31 v6943 Used by System Menu 4.3 v6687 Active
IOS222 255.0 v65280 Piracy prevention. v65280 Preventative
IOS223 255.0 v65280 Piracy prevention. v65280 Preventative
IOS249 255.0 v65280 Piracy prevention. v65280 Preventative
IOS250 255.0 v65280 Piracy prevention. v65280 Preventative
IOS254 12.16 v2, v3, v260 Distributed along with all System Menus since System Menu 3.4 as a quick fix for PatchMii. It's just a copy of IOS9. As Nintendo releases new versions of IOS9 this title will also receive updates.-ex IOS9 v521 corresponds to v3 of IOS254. v2, v3, v260 Preventative