The Nintendo Gamecube has fairly sophisticated hardware for the time, this was when Nintendo was still trying to compete with raw processing power. The hardware would then be used as a basis of both the Wii and Wii U consoles in the future.
Rodrigo Copetti has an excellent in-depth article about the hardware architecture of the Nintendo Gamecube, it is a must read for anyone wanting to reverse engineer Gamecube games as you will need to know all about the low level architecture.
Rodrigo Copetti's Gamecube Hardware Architecture
The website by Rodrigo Copetti is required reading for any information you want to know about the Gamecube console hardware architecture
Nintendo Gamecube (Dolphin) Development Kit Hardware
For information about Nintendo's Dolphin development hardware check out this post.
In China there were plans to release a version of the Gamecube with DVD playback functionality and additional security. This was to be a sequal to the iQue Player which was a Chinese only Nintendo 64 plug and play device. However half way through development the resources were moved to work on the Nintendo Wii instead.
iQue Gamecube Leak (BB2)
For information about iQue/BroadOn's prototype Chinese Gamecube hardware check out this post.
The Nintendo Gamecube has an excellent library of games just begging to be reverse engineered, it is always a good idea to do some research before you start, this is where this section comes in as it deals with specific games.
If you are interested in reverse engineering a Gamecube game, the first step is to find out if the game has its debug symbols available, this makes it much easier to reverse as all the functions will have nice friendly human readable names.
Nintendo Gamecube Games with Debug Symbols
Check out this post for a list of Gamecube games with debug symbols.
Prototype games are ideal targets for reverse engineering as many of them contain developer information inside them and some games never got a retail release, making them even more interesting!
List of Nintendo Gamecube Prototypes - Hidden Palace
Hidden Palace has the most complete list of released Gamecube Prototypes and Demos, check it out here.
Nintendo Gamecube (Dolphin) File Formats
Check out this post for a list of Gamecube file formats.
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