Ios56-64-v5661.wad |work| -

The choice of IOS56 as a base for cIOS was not arbitrary. Different IOS versions have different hardware access capabilities:

In the early days of Wii modding, the primary goal was to run unsigned code (homebrew). Nintendo had locked the system down tight; the console would only install or run files signed with Nintendo’s cryptographic signature. ios56-64-v5661.wad

Here is where enters the legend.