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When [[RVL-CPU-20]] consoles were released, [[IOS16]] became one of the only IOSes that could be downgraded without issues, which resulted in general homebrew also installing [[IOS16]] to get access to the [[signing bug]] and patch other IOSes.
When [[RVL-CPU-20]] consoles were released, [[IOS16]] became one of the only IOSes that could be downgraded without issues, which resulted in general homebrew also installing [[IOS16]] to get access to the [[signing bug]] and patch other IOSes.
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Nintendo responded in the [[4.0|4.0 update]] by releasing a stubbed [[IOS16]] (v512). It is unknown how the Wii Backup Disc worked after this point, although it may have instead been changes to use a newer IOS such as [[IOS36]], since [[IOS16]] did not have anything critical to the Wii Backup Disc's function.
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== Blocking ==
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Nintendo responded to unauthorized disc and IOS16 usage in the [[4.0|4.0 update]] by releasing a stubbed [[IOS16]] (v512). In addition, the System Menu refuses to boot any disc that uses IOS16, with message <code>This must be a backup disk</code>, and it blocks the ID 410x in the same area of the code that blocks the [[Wii Startup Disc]].
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It is unknown how repairs worked after this point, since the debug message would make less sense if a new Wii Backup Disc was released.
== Screenshots ==
== Screenshots ==