This page contains notes for the game F-Zero X.

Interesting Memory Addresses

All of the following addresses are found in the RDRAM domain. For any values related to player 1, add 3A8 to the offset to get the same memory address for player 2/AI 1, again for player 3/AI 2, etc.

Hidden Track Indices

Indices 0-17 are the normal tracks found in the track selection menus (except for X cup tracks), in the same order as in the menus (Mute City 1 is 0, Silence 1 is 1, etc.). To change the track selection to unintended values, select any track in any mode, freeze the 1-byte RDRAM memory address 0F8517 and change its value to one of the ones listed below. The value can also be changed in the machine selection screen after you've selected a track instead (this is necessary to play the GP ending track, but no others).

All indices past 36 freeze the game if it tries to display their track title, and all of them past 37 will also crash the game when attempting to start a race in them.

Game Modes and Menus

The binary 2-byte address 0DCE46 determines the game mode or menu that the game is currently in. The higher byte appears to be some kind of menu flag, because it's never used in a race. Note that attempting to change the value directly from one that has the menu flag enabled to one that doesn't (ex. changing from 8007 (main menu) to 0001 (GP mode)) and vice-versa will usually freeze the game, but changing from one that has it disabled to another one that has it disabled usually works with interesting effects (ex. changing from 000E (time trial) to 0011 (GP cup finish)). Below are all the values of this address that are used by the game.