in the cheat.txt file it is a pure text file that can be used to import manually cheat code in the cheat menu. The only "automatic cheats" file are the one saved by the emulator in the cht folder (one file by game, where the filename is the name of the rom file, and it contains less than 10 cheats).
The cheat.txt can contains as many cheats as you want. (but only one cheat by line)
To import a cheat in the game, go in the cheat menu, select an empty cheat line and then use the import menu. The cheat.txt will then be displayed and you can move the cursor on the line you want to import the cheat from. After you validate the line, the cheat should appear in the cheat menu. You can then save the selection of cheats you've done and it will be save in the cht folder. Next time, when you launch the same game, all the cheats you have previously selected should appears automatically.
hope that helps.
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