<p>FCEUX may not run well on slower CPU's. You can improve performance by setting sound to low quality in the<aclass="rvts18"href="SoundOptions.html"> Sound Dialog</a>. In addition, for windowed mode try enabling hardware acceleration in the <aclass="rvts18"href="Video.html">Video config</a> dialog may also help.</p>
<p>On slower computers, savestates can be slow with long movies. A small speedup can be done by disabling config > enable > Backup savestates.</p>
<p>FCEUX uses the color palette of the old FCEU / FCEUXD branches. However, FCEUX comes pre-packaged with several additional color palettes. For more information see <aclass="rvts18"href="Palette.html">Palette config</a> and <aclass="rvts18"href="PaletteOptions.html">Palette options</a>.</p>
<p>Depending on what version of FCEU / Game your .fcm was made, there maybe a number of sync issues. These are listed in detail at <aclass="rvts18"href="http://tasvideos.org/ConvertFCMtoFM2.html"target="_blank">http://tasvideos.org/ConvertFCMtoFM2.html</a>.</p>
<p>Double check you have the Lua .dll files that came packaged with FCEUX 2.1. They must be in the /dll folder from the root directory (where fceux.exe is stored).</p>
<p>Currently this error will happen when attempting to do Full screen mode on Windows Vista. In addition, there has been one reported case of this happening on the 32-bit version of Windows XP. This is a known issue with FCEUX that has not yet been resolved.</p>
<p>FCEUX requires the FDS Bios to be named disksys.rom. It must be located in the root directory (where fceux.exe is stored) or in the folder of the FDS Directory override (see <aclass="rvts18"href="Directories.html">Directory overrides</a>).</p>
<p>While FCEUX has a <aclass="rvts18"href="GameGenieEncoderDecoder.html">Game Genie code converter</a>, you can also use game genie codes with the game genie rom. It must be named gg.rom and be placed in the root directory (where fceux.exe is stored). You must also check NES > Game Genie in the main menu.</p>
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