Undo revision 105355 by TopHatGuy (talk) -- this doesn't really make sense... The BT stack is on the PPC side. IOS doesn't care about what gets transferred over USB (OH1).
IOS12 is the oldest known version of IOS. It was probably developed to be used in Wii Demos and product showcases. It is only known to have one function, which is to control the Bluetooth functonality of the Wii and Wiimote.