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February 17, 2018, 10:41:36 PM

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Author Topic: Gecko OS  (Read 1228 times)
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Lord Puffington

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Gecko OS
« on: April 30, 2009, 11:32:08 AM »


Load boot.elf from Chain Loader. Insert any Wii Game and press reset. Enjoy your region free gaming. As of beta 5, Gecko OS works correctly with the Homebrew Channel.

GeckoOS includes the latest version of the Region Free app, which works with the Homebrew Channel. The latest version has increased compatibility with more games supported and issues running US games on PAL consoles fixed.

Note that while GeckoOS will enable the US Rock Band to load on a non-US console the guitars and drum set will not work (no controller ID lights lit). To load Rock Band try Menu Loader instead.

Cool Additional Bonus (optional)

If you own a USB Gecko it will install a remote debugger and screenshot engine into memory and will hook. This means you can load Gecko Tool version included and grab screen shots and use the remote debugger in any Wii game. This is all done on the fly and silently. Users without a USB Gecko, the remote debugger and screenshot engine is just ignored and has no effect on your game play!.

Technical Jargon

Gecko OS/Gecko Region Free was created with the homebrew libogc library. No certs, TMD, Tik, keys or other Nintendo copyright material were used or attached in the file, making it a pure homebrew release. No Datel code was used either, so please don't call this a clone etc as this and Freeloader work in completely different ways.

The decryption is done by the hardware, not in software and the correct IOS version of the game booting is selected and used. This is done by reading the information off the DVD using the low level read commands and then passed back to the starlet.

My own apploader was written, and will completely ignore the update partition, no patching is done except a region flag which is required.

This of course only works with Wii games.


Ocarina is a cheat homebrew, now integrated in Gecko OS.

Ocarina checks the GAME ID like RZDP01 for Zelda Twilight Princess (PAL). Then it checks the inserted SD card whether it can find a cheat code file for that game: in this case it would have to be named [sd]:\codes\rzdp01.gct.

To create GCT files, a PC application (Code Manager) was bundled in the package and now is available from the Gecko OS forum :

This application is coming with 2 sample files : rsbe.txt and rsbp.txt (Smash Brothers NTSC-U and PAL respectively). Using the File menu you can open them and select the cheats you want.

Note that unlike an Action Replay, you can modify codes with XXXXXXXX inside them. It will always ask you to store modifications to its application memory.

Once you're done selecting codes: click on "Export to GCT" and the rest should be pretty straight forward! Codes can be found here :

What's New:

    * Moved rebooter to a menu item
    * Fixed a bug that prevented the codes and patch folder from being found if in data/gecko
    * Fixed a bug that caused a core dump if background.png is in the root directory of the SD card
    * Language and video mode settings from WiiRD are now used if a game is started from WiiRD
    * Fixed a rebooter bug that caused the currently inserted game disc not to show up in the disc channel



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