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* [[3.4]] and [[3.5]] included a copy of [[IOS9]] as IOS254 to overwrite PatchMii, as that was the last place (besides [[IOS16]]) the [[signing bug]] could be exploited. Each IOS9 update was then copied to this IOS.
* [[3.4]] and [[3.5]] included a copy of [[IOS9]] as IOS254 to overwrite PatchMii, as that was the last place (besides [[IOS16]]) the [[signing bug]] could be exploited. Each IOS9 update was then copied to this IOS.
* The [[4.3]] update included a [[Stub IOS]] in this slot, in an attempt to overwrite BootMii/IOS, which succeeded for BootMii versions earlier than 1.4. Versions 1.4 and above use version 65281 to prevent this.
* The [[4.3]] update included a [[Stub IOS]] in this slot, in an attempt to overwrite BootMii/IOS, which succeeded for BootMii versions earlier than 1.4. Versions 1.4 and above use version 65281 to prevent this.
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== Titles using this IOS ==
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Nothing uses IOS254.
== Version history ==
== Version history ==