Ethernet GAME CUBE

Progress about the development of a new custom broadband adapter to the Game Cube(GC).

• Front picture of the GAME CUBE with the BBA

• Pictures of the BBA (JAP. version)

• Down picture of the GAME CUBE withour the serial port 1 cover

Day 1: [17/10/2023]

Researching

• The first step is to look for any kind of documentation and information about the Serial Port 1 and the broadband adapter (BBA).

As cover page the GCForever Wiki gives a few, but important, information about the BBA, as the PCB pictures with the reference of the two ICs (MX98730EC and TDK TLA-6T118). Later, after some help (by Extrems user at webhdx discord) I have found a datasheet of a similar IC to the MX98730EC. That IC works as a converter from a (kind of) SPI to Ethernet.

Day 2: [18/10/2023]

Researching

With the datasheet of the IC found yesterday, some aspects about the serial protocol used by the GC can be clarified. However, it can’t be consider as the main document about the BBA. Probably it will help having some trace extracted directly from the GC.