'Value' is the value (in hex) that is written to the addresses on each update. The checkbox denotes that the current cheat is active or not (click on it will toggle on/off). The 'Address' is the location in the 6502's address space. If you didn't provide a name, it will be automatically named using this format:įor simple 'Substitute' type of cheats: * Address:Valueįor 'Compare' type of cheats: * Address?Compare:Value Existing cheats can be selected, edited, and updated using the 'Update' button.Įach entry in the list can be named. The Active cheats window on the left contains the list of cheats for the currently loaded game. The cheat search interface consists of several components: a list of addresses and associated data for a search, several command buttons, and the search parameters.Īll addresses listed in the cheat search windows are in unsigned 16-bit hexadecimal format and all values in these windows are in an unsigned 8-bit decimal format(the range for values is 0 through 255). cht file folder can be changed with the Directory Override menu. Note: When a game is loaded, FCEUX will load any accompanying saved. 'S' denotes a cheat that is a read-substitute-style cheat(such as with Game Genie cheats), and a 'C' denotes that the cheat has a compare value. The format is as follows(text in brackets represents optional parameters):Īddress(hex):Value(hex):DescriptionĪ colon(:) near the beginning of the line is used to disable the cheat. Each line represents a one-byte memory patch. The files are in a simple plain-text format. The cheat search comes with its own set of tools for finding addresses in memory to use for making cheats (or for monitoring the addresses in the memory watch window )īy default cheat files (.cht) are stored in the 'cheats' subdirectory under the base FCEUX. Fortunately, such games are not very common (in relation to the total number of NES and Famicom games).

However, this does mean that cheating with games that use bank-switched RAM may be problematic. This detail shouldn't concern most people, though. The RAM patches are all applied a short time before the emulated vertical blanking period. Also, in FCE Ultra, read substitution will not work properly with zero-page addressing modes(instructions that operate on RAM at $0000 through $00FF).

It is required to support GG and PAR codes, but since it is relatively slow when done in emulation, it is not the preferred method when a RAM patch will suffice. 'Read substitution' is the method that would be used on a real NES/Famicom, such as done by the Game Genie and Pro Action Replay. FCE Ultra allows cheating by the periodic 'patching' of arbitrary addresses in the 6502's memory space with arbitrary values, as well as read substitution.

Snes9x .cht files