Changes

! scope="row"| IOS4

! scope="row"| IOS4

|Three versions of IOS4 have been released; v3, v259, and a stub identical to the IOS3 stub described above. An additional version, IOS4v1, is also known to exist. v3 was the 'original' version of IOS4, and has been found through 3 different sources; the development version present in the SDK's "swupdate403" package (available in the Development section), the version present on the Startup Disc NAND, and the version that was included with early Wiis and not overwritten until the October 2008 update. No retail games or applications used IOS4 due to it being a very limited and "barebones" IOS lacking what would come to be basic functionality, however it could be considered to be the earliest released IOS as v3 was distributed on Wiis, and for unknown reasons was even available on NUS for some time. As with how IOS3 was the primary development IOS before IOS4's release, IOS4 was used as the primary development IOS for a period of time in August-September 2006 before IOS9 was ready for developer use. As such, any Wii software built around that time typically uses IOS4, however the only available examples of this are the Startup Disc Menu and various unreleased factory tools that are known to use IOS4 from their TMD. For unknown reasons, Nintendo continued to include the IOS4 updater package (intended for updating a development kit from IOS3) with their development tools for years past when IOS4 was in use; this makes the development version of IOS4 readily available. IOS4-v1's existence is known due to remnants of it being found in the Startup Disc NAND, however not much else about it is known; since IOS4-v3 was considered finalized enough to be put on NUS, it can be assumed that this was simply an unfinished version of the IOS. As mentioned previously, IOS4-v3 was shipped intact on early Wiis; it is not known if this was intentional, or if it was only ever intended to be used for factory purposes and was not overwritten. Regardless, in October 2008, Nintendo released IOS4-v65280, a useless stub intended to overwrite all existing copies of IOS4. This stub was also preinstalled on Wiis around the same time as the IOS3 stub being preinstalled, indicating that IOS4 continued to be used for factory purposes. IOS4-v259 is by far the most mysterious version of this IOS, and very little about it is known; it has been said that it is a Korean IOS and was used on Korean Wiis at some point for unknown purposes, however further details at this point are scarce; it's not even currently known if the IOS is legitimate or not. This file will be updated if anything new surfaces.

|Three versions of IOS4 have been released; v3, v259, and a stub identical to the IOS3 stub described above. An additional version, IOS4v1, is also known to exist. v3 was the 'original' version of IOS4, and has been found through 3 different sources; the development version present in the SDK's "swupdate403" package (available in the Development section), the version present on the Startup Disc NAND, and the version that was included with early Wiis and not overwritten until the October 2008 update. No retail games or applications used IOS4 due to it being a very limited and "barebones" IOS lacking what would come to be basic functionality, however it could be considered to be the earliest released IOS as v3 was distributed on Wiis, and for unknown reasons was even available on NUS for some time. As with how IOS3 was the primary development IOS before IOS4's release, IOS4 was used as the primary development IOS for a period of time in August-September 2006 before IOS9 was ready for developer use. As such, any Wii software built around that time typically uses IOS4, however the only available examples of this are the Startup Disc Menu and various unreleased factory tools that are known to use IOS4 from their TMD. For unknown reasons, Nintendo continued to include the IOS4 updater package (intended for updating a development kit from IOS3) with their development tools for years past when IOS4 was in use; this makes the development version of IOS4 readily available. IOS4-v1's existence is known due to remnants of it being found in the Startup Disc NAND, however not much else about it is known; since IOS4-v3 was considered finalized enough to be put on NUS, it can be assumed that this was simply an unfinished version of the IOS. As mentioned previously, IOS4-v3 was shipped intact on early Wiis; it is not known if this was intentional, or if it was only ever intended to be used for factory purposes and was not overwritten. Regardless, in October 2008, Nintendo released IOS4-v65280, a useless stub intended to overwrite all existing copies of IOS4. This stub was also preinstalled on Wiis around the same time as the IOS3 stub being preinstalled, indicating that IOS4 continued to be used for factory purposes. IOS4-v259 is by far the most mysterious version of this IOS, and very little about it is known; it has been said that it is a Korean IOS and was used on Korean Wiis at some point for unknown purposes, however further details at this point are scarce; it's not even currently known if the IOS is legitimate or not. This file will be updated if anything new surfaces.

|-

|-

! scope="row"| IOS5

! scope="row"| IOS5

| Unknown, believed to be a leftover IOS created by the xyzzy key dumper.

| Unknown, believed to be a leftover IOS created by the xyzzy key dumper.

|}

|}

== References ==

== References ==