The Wii's eFuses are programmed via JTAG at chip manufacture time with a special power pin. Since the JTAG has a disabling flag in the eFuse region itself which is normally set on most [[Hollywood]] chips, the eFuses can never be programmed again once this flag is set and this is the case for almost all Wii units in existence (including final devkits). | The Wii's eFuses are programmed via JTAG at chip manufacture time with a special power pin. Since the JTAG has a disabling flag in the eFuse region itself which is normally set on most [[Hollywood]] chips, the eFuses can never be programmed again once this flag is set and this is the case for almost all Wii units in existence (including final devkits). |