Wii/Wii U A1277 Ethernet EEPROM Patcher

Download this script if you want to modify the firmware locally:
a1277-to-ax88772.zip

Quick Start Without A1277 binary upload

Generates a sterile, generic ASIX AX88772A payload using the unlocked UGREEN base. Assigns a mathematically random ASIX OUI MAC address and derives the serial number from the last six characters of the MAC.

AX88772A EEPROM with original data from your A1277

Upload your original 512-byte Apple A1277 dump. The script will strictly extract your genuine MAC address and Serial Number, and graft them onto the unlocked UGREEN configuration map with generic ASIX identifiers.

Advanced Configuration

Manually override the payload identifiers. The hardware presets will populate the baseline formats before modification. All custom payloads are physically grafted onto the unlocked UGREEN base.

Select Hardware Preset:



Device Identifiers
Vanity Strings
Output Options