IOS51 was used for the Wii Shop Channel that came with the October 23 update. As of the System Menu 4.0 update, IOS51 was turned into a stub IOS.
IOS51v4633 only differs from IOS50v4633 in the fact that IOS51v4633 has an FFSP module instead of an FSP module, but has the same version number. This probably means the System Menu-system channel IOS pairs are built from the same build script. The difference between these types of FS modules is not currently known.
Compared to IOS53, IOS51 seems to have a newer OHCI module (04/07/08 -> 08/13/08), a newer WD module (08/07/07 -> 08/04/08), a newer WL module (06/28/07 -> 08/04/08), and a newer SSL module (06/21/07 -> 02/27/08).
Titles using this IOS
Version history
