Generally, the branch will leave the game’s VISetNextFrameBuffer method at the blr (return) instruction called a ‘VI Hook’. It definitely resides in an unused area of RAM, typically addressed 0x80002800 on Wii. This way is the same as inserting a branch from the game’s Assembly Code to the Gecko Codes interpreter. To use gecko codes, the loader will patch the game to add a ‘hook’. gct file used by most interpreters, the code should be directly converted to the equivalent binary representation The gecko codes are commonly presented in hexadecimal with 64 bits per line that will be divided into two columns.