![]() Homebrew software will often run under a relatively large range of IOS versions, sometimes constrained by requiring newer features (e.g. Since the IOS API is largely forwards-compatible, it is often possible (though not recommended) to run official software with an alternate IOS branch or slot BC-NAND takes advantage of this so that IOS does not need to be reloaded a second time every time a title is launched. In that sense, IOS is higher in the security hierarchy than code running on the PowerPC. ![]() However, IOS does isolate its memory from access by the main Broadway CPU, has the ability to reboot (and hence bootstrap) it, and is designed to be secure if the PowerPC side is compromised (although in practice many exploits have been found). ![]() IOS is not a "hypervisor", as it runs on a dedicated, separate CPU. Typically, the only times IOS is not in use is when running GameCube software (which uses MIOS instead - effectively a dummy IOS), or when BootMii and related software is in use (which uses mini instead). It provides services that are used by Wii code to access many system devices: USB, networking, security, app management, NAND flash storage, SD card, optical disc, and also WiiConnect24 features.Īll software using the Wii SDK or libogc relies on a running IOS on the Starlet (with a few exceptions in the latter case - it is possible to shut down IOS services from libogc and work without it). ![]() ![]() IOS (sometimes internally referred to as IOP - possibly "Input Output Proxy") is the operating system that runs on the Starlet (IOP) coprocessor ( Starbuck on the vWii) inside the Hollywood package. Not to be confused with Apple's iOS, which runs on the iPhone, which was released half a year after the Wii, or IOSU, which runs on the Wii U, sometimes referred to as IOS. ![]()
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