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Cisco Internetwork Operating System (IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches. Earlier, Cisco switches ran CatOS. IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. Although the IOS code base includes a cooperative multitasking kernel, most IOS features have been ported to other kernels such as QNX and Linux for use in Cisco products.

'''IOS''' (internally known as '''IOP-OS''' and '''boot3''') is the Wii's operating system running on the [[IOP]] (Starlet) ARM9 core inside the [[Hollywood]]/[[Bollywood]] package, developed by [[BroadOn]]. It handles I/O and security tasks, providing hardware access to the [[Broadway]] as well as serving as a barebones 'hypervisor' for the system upholding content licensing restrictions. This article lists all of the known IOS versions, and their details/differences.

==General Notes==

==General Notes==

*All retail IOSes have "64" in the filename, and some development IOSes have "128" in the filename; this signifies the [[MEM2]] size that the IOS is configured to run on. MEM2 is the Wii's larger main memory, not present in the GameCube, and while retail units have a 64MB MEM2, certain development units ([[NDEV]] and [[RVT-H Reader]]) have a 128MB MEM2; as such, IOSes built to run on these units have "128" in their filename, and IOSes built for 64MB development kits and retail units have "64" in their filename.

*All retail IOSes have "64" in the filename, and some development IOSes have "128" in the filename; this signifies the [[MEM2]] size that the IOS is configured to run on. MEM2 is the Wii's larger main memory, not present in the GameCube, and while retail units have a 64MB MEM2, certain development units ([[NDEV]] and [[RVT-H Reader]]) have a 128MB MEM2; as such, IOSes built to run on these units have "128" in their filename, and IOSes built for 64MB development kits and retail units have "64" in their filename.

**IOSes use two different version number schemes; one is used for retail IOSes and is seen on Nintendo's update servers and discs, and another is used for development IOSes and internal purposes. As such, all retail IOSes in the folder use one scheme, and all development IOSes use another. As quoted from Wiibrew: "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." The "IOS-64-v" format is used for retail IOSes, and "firmware.64/128.(hex version number).(major version)" is used for development IOSes.

**IOSes use two different version number schemes; one is used for retail IOSes and is seen on Nintendo's update servers and discs, and another is used for development IOSes and internal purposes. As such, all retail IOSes in the folder use one scheme, and all development IOSes use another. As quoted from Wiibrew: "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."<ref>It is worth noting that it appears that a traditional versioning scheme was used for IOS internally, and the "vXXX" identification is a misnomer - IOS9v516, for example, is not IOS9v516 or IOS9, version 2.4, but IOS 9.2.4.</ref> The "IOS-64-v" format is used for retail IOSes, and "firmware.64/128.(hex version number).(major version)" is used for development IOSes.

 

 

***Development IOSes are similar to retail IOSes, however they use the development encryption keys in place of the real ones, meaning that they will only handle development-signed content, which retail IOSes will not handle. It should be noted that since the development private RSA key is public information (or rather, developer information which has been leaked), it is possible to sign arbitrary content and install it with development IOSes.

***Development IOSes are similar to retail IOSes, however they use the development encryption keys in place of the real ones, meaning that they will only handle development-signed content, which retail IOSes will not handle. It should be noted that since the development private RSA key is public information (or rather, developer information which has been leaked), it is possible to sign arbitrary content and install it with development IOSes.

3 - RGD original research

3 - RGD original research

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[[Category:Wii]]

[[Category:Wii]]

[[Category:Firmware]]

[[Category:Firmware]]