Wii EEPROM hacking & a wish list from Spark Fun Electronics

Fun & Games Technology
Wii EEPROM hacking & a wish list from Spark Fun Electronics

Spark Fun Electronics poked at the EPROM on the Wii, fun stuff–

“We just couldn’t not do it. We had to see what was on the Wii EEPROM. There’s surprising amount of 8051 instructions actually. How neat!

We hot-aired off the EEPROM and soldered it down to our SSOP breakout board. We then hooked up the unit to an AVR micro that could handle the I2C communication and clocked out all the I2C data from the M24128 into the AVR and down the serial pipe to the computer and captured it. You will find the binary file here. My bet was that the EEPROM contained all constants like Bluetooth ID, firmware revision, etc. And that all the fun Wii Remote functionality was burned into the Broadcom part. David’s bet was that the Broadcom part was just the Bluetooth HID stack and protocol and that it pinged the EEPROM during boot up for actual Wii Controller firmware. We were both right!

Looking at the binary file, the fun thing to note is the word ‘Nintendo’ a couple thousand bytes into the file. Boy would that be fun to alter. The real kicker was that we found unencrypted 8051 code in the file. We don’t know if it is checksumed or anything, but you should be able to hack away. This seems to indicate that the entire Wii Remote functionality is contained on this M24128 EEPROM. Nifty.”Link.


  • Wii-mote guts – Link.

And since today and the 20th (Weds) are the last days to order stuff from Spark Fun, I asked Nathan from Spark fun to put together a list of fun electronics to gift for the holidays, here they are – Get’em while you can! (MAKE is not affiliated with Spark Fun in any way, I just like their stuff).

THE phone – Link.

The BlueSMiRF is a really great product – Link.

Arduino arduino arduino! – Link.

Gpslog-Act Img
GPS datalogger – Link.

Simon game? – Link.

Witilt Img
Wireless accelerometer – Use this for wireless control, sensing, game controller, etc – Link.

Logomatic data logger, For all those crazy idea datalogging projects – Link.

Hot air rework and soldering iron for to DIY soldering and SMD repair – Link. & Our SMD tutorials – learn how to use the tool – Link.

4 thoughts on “Wii EEPROM hacking & a wish list from Spark Fun Electronics

  1. japroach says:

    It is also possible to read I2C eeproms directly to the pc with ponyprog. A small circuit is needed to connect to the com port.

    btw aoyue = great for the price

  2. ian-2 says:

    I’ve got the bigger 3-in-1 aoyue with the adjustable iron, smoke absorber, and blue LED. I simple love it. I got it in part because sparkfun said they use an aoyue in their office. Cheap stuff, great for medium duty work at unbeatable prices – less than the total cost of the last few cheap irons that gave out on me.

    I know I’m a fanboy, but I had no idea I could have hot air rework (or even a good adjustable iron) for so cheap. I could get two aoyue 3-in-1s for the price of an entry level Weller.

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