![]() "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.
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