Why don some games work correctly on FCE Ultra?
Many factors can make a game not work on FCE Ultra: • If the ROM image is in the iNES format(typically files that have the extension “nes”), its header may be incorrect. This incorrectness may also be because of garbage in the header. Certain utilities used to put text in the reserved bytes of the iNES header, then those reserved bytes were later assigned functions. FCE Ultra recognizes and automatically removes(from the ROM image in RAM, not on the storage medium) SOME header junk. If the game has graphical errors while scrolling, chances are the mirroring is set incorrectly in the header. You can try to edit the header with a utility(such as uCON64) or a hex editor. • The on-cart hardware the game uses may not be emulated correctly. • Limitations of the ROM image format may prevent a game from being emulated correctly without special code to recognize that game. This occurs quite often with many Koei MMC5(iNES mapper 5) and MMC1(iNES mapper 1) games in the iNES format. FCE Ultra iden
