fceux/web/help/fcm.html

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<h2>.fcm</h2>
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<p class="rvps2"><span class="rvts17">FCE Ultra Movie File Format</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">- Updated March 22, 2004</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6">The FCM file format is a somewhat "joined" file format. &nbsp;The first part of a FCM</span></p>
<p class="rvps2"><span class="rvts6">file will contain an FCS-format state save. &nbsp;After this data, the FCM-specific data</span></p>
<p class="rvps2"><span class="rvts6">begins, which is being referred to from this point.</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6">Currently, the only supported input scheme for a FCM is four joysticks.</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6">The FCM data consists of a stream of joystick commands:</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">dLLjjbbb</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">d &nbsp;= Dummy update, if set. &nbsp;Used to reset frame timestamp.</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">LL &nbsp;= timestamp length, in bytes(maximum of 3 bytes).</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">jj &nbsp;= Which joystick(0-3).</span></p>
<p class="rvps2"><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">bbb = Which button(0-7).</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">If the dummy update bit is set, a command can also have occurred. &nbsp;Look at the</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">lower 5 bits:</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">0</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">=</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">Just a dummy update.</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">1</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">=</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">Reset</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">2</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">=</span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">Power</span></p>
<p class="rvps2"><span class="rvts6"><br/></span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">The timestamp is stored after the joystick command, in LSB-first format. &nbsp;It is</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">the number of frames since the last event. &nbsp;A timestamp length of "0" is valid, to</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">be used when several different buttons need to change state at the same time(same frame,</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span class="rvts6">at least).</span></p>
<p class="rvps2"><span class="rvts6"></span><span class="rvts6"></span></p>
<p class="rvps4" style="clear: both;"><span class="rvts18">Created with the Personal Edition of HelpNDoc: </span><a class="rvts19" href="https://www.helpndoc.com/feature-tour/create-help-files-for-the-qt-help-framework">Create cross-platform Qt Help files</a></p>
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