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<center><h1>Sega Game Gear Documentation</h1></center>
<center><i>Last updated August 3, 2014<br>Valid as of 0.9.36.3</i></center>
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<b>Table of Contents:</b>
<ul><li><a href="#Introduction">Introduction</a><ul></ul></li><li><a href="#Settings+Reference">Settings Reference</a><ul></ul></li></ul><hr width="100%">
<h2><a name="Introduction">Introduction</a></h2><p></p>Mednafen's Sega Game Gear emulation is based off of <a href="http://cgfm2.emuviews.com/smsplus.php">SMS Plus</a>.
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Game Gear emulation in Mednafen is a low-priority system in terms of proactive maintenance and bugfixes.
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<h2><a name="Settings+Reference">Settings Reference</a></h2><p></p><p>
<b>Caution:</b> Any settings that change emulation behavior as seen from the emulated game are shown with the setting name bolded in the table. One should be conscious of these settings if one has changed them from the default values when using network play or movies, as they can cause desychronizations if not set the same among hosts(or between the recording emulator and the playing emulator).
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<p></p><table border><tr class="TableHeader"><th>Setting:</th><th>Value Type:</th><th>Possible Values:</th><th>Default Value:</th><th>Description:</th></tr></table><p></p><table border><tr class="TableHeader"><th>Setting:</th><th>Value Type:</th><th>Possible Values:</th><th>Default Value:</th><th>Description:</th></tr><tr class="RowA"><td class="ColA">gg.enable</td><td class="ColB">boolean</td><td class="ColC">0<br>1</td><td class="ColD">1</td><td class="ColE"><a name="gg.enable">Enable (automatic) usage of this module.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.forcemono</td><td class="ColB">boolean</td><td class="ColC">0<br>1</td><td class="ColD">0</td><td class="ColE"><a name="gg.forcemono">Force monophonic sound output.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.pixshader</td><td class="ColB">enum</td><td class="ColC">none<br>autoip<br>autoipsharper<br>scale2x<br>sabr<br>ipsharper<br>ipxnoty<br>ipynotx<br>ipxnotysharper<br>ipynotxsharper</td><td class="ColD">none</td><td class="ColE"><a name="gg.pixshader">Enable specified OpenGL pixel shader.</a><p>Obviously, this will only work with the OpenGL "video.driver" setting, and only on cards and OpenGL implementations that support pixel shaders, otherwise you will get a black screen, or Mednafen may display an error message when starting up. Bilinear interpolation is disabled with pixel shaders, and any interpolation, if present, will be noted in the description of each pixel shader.</p><ul><li><b>none</b> - None/Disabled<br></li><br><li><b>autoip</b> - Auto Interpolation<br>Will automatically interpolate on each axis if the corresponding effective scaling factor is not an integer.</li><br><li><b>autoipsharper</b> - Sharper Auto Interpolation<br>Same as "autoip", but when interpolation is done, it is done in a manner that will reduce blurriness if possible.</li><br><li><b>scale2x</b> - Scale2x<br></li><br><li><b>sabr</b> - SABR v3.0<br>GPU-intensive.</li><br><li><b>ipsharper</b> - Sharper bilinear interpolation.<br></li><br><li><b>ipxnoty</b> - Linear interpolation on X axis only.<br></li><br><li><b>ipynotx</b> - Linear interpolation on Y axis only.<br></li><br><li><b>ipxnotysharper</b> - Sharper version of "ipxnoty".<br></li><br><li><b>ipynotxsharper</b> - Sharper version of "ipynotx".<br></li></ul></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.scanlines</td><td class="ColB">integer</td><td class="ColC">-100 <i>through</i> 100</td><td class="ColD">0</td><td class="ColE"><a name="gg.scanlines">Enable scanlines with specified opacity.</a><p>Opacity is specified in %; IE a value of "100" will give entirely black scanlines.<br>
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Negative values are the same as positive values for non-interlaced video, but for interlaced video will cause the scanlines to be overlaid over the previous field's lines(only if the video.deinterlacer setting is set to "weave", the default).</p></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.special</td><td class="ColB">enum</td><td class="ColC">none<br>hq2x<br>hq3x<br>hq4x<br>scale2x<br>scale3x<br>scale4x<br>2xsai<br>super2xsai<br>supereagle<br>nn2x<br>nn3x<br>nn4x<br>nny2x<br>nny3x<br>nny4x</td><td class="ColD">none</td><td class="ColE"><a name="gg.special">Enable specified special video scaler.</a><p>The destination rectangle is NOT altered by this setting, so if you have xscale and yscale set to "2", and try to use a 3x scaling filter like hq3x, the image is not going to look that great. The nearest-neighbor scalers are intended for use with bilinear interpolation enabled, at high resolutions(such as 1280x1024; nn2x(or nny2x) + bilinear interpolation + fullscreen stretching at this resolution looks quite nice).</p><ul><li><b>none</b> - None/Disabled<br></li><br><li><b>hq2x</b> - hq2x<br></li><br><li><b>hq3x</b> - hq3x<br></li><br><li><b>hq4x</b> - hq4x<br></li><br><li><b>scale2x</b> - scale2x<br></li><br><li><b>scale3x</b> - scale3x<br></li><br><li><b>scale4x</b> - scale4x<br></li><br><li><b>2xsai</b> - 2xSaI<br></li><br><li><b>super2xsai</b> - Super 2xSaI<br></li><br><li><b>supereagle</b> - Super Eagle<br></li><br><li><b>nn2x</b> - Nearest-neighbor 2x<br></li><br><li><b>nn3x</b> - Nearest-neighbor 3x<br></li><br><li><b>nn4x</b> - Nearest-neighbor 4x<br></li><br><li><b>nny2x</b> - Nearest-neighbor 2x, y axis only<br></li><br><li><b>nny3x</b> - Nearest-neighbor 3x, y axis only<br></li><br><li><b>nny4x</b> - Nearest-neighbor 4x, y axis only<br></li></ul></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.stretch</td><td class="ColB">enum</td><td class="ColC">0<br>full<br>aspect<br>aspect_int<br>aspect_mult2</td><td class="ColD">aspect_mult2</td><td class="ColE"><a name="gg.stretch">Stretch to fill screen.</a><ul><li><b>0</b> - Disabled<br></li><br><li><b>full</b> - Full<br>Full-screen stretch, disregarding aspect ratio.</li><br><li><b>aspect</b> - Aspect Preserve<br>Full-screen stretch as far as the aspect ratio(in this sense, the equivalent xscalefs == yscalefs) can be maintained.</li><br><li><b>aspect_int</b> - Aspect Preserve + Integer Scale<br>Full-screen stretch, same as "aspect" except that the equivalent xscalefs and yscalefs are rounded down to the nearest integer.</li><br><li><b>aspect_mult2</b> - Aspect Preserve + Integer Multiple-of-2 Scale<br>Full-screen stretch, same as "aspect_int", but rounds down to the nearest multiple of 2.</li></ul></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.tblur</td><td class="ColB">boolean</td><td class="ColC">0<br>1</td><td class="ColD">0</td><td class="ColE"><a name="gg.tblur">Enable video temporal blur(50/50 previous/current frame by default).</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.tblur.accum</td><td class="ColB">boolean</td><td class="ColC">0<br>1</td><td class="ColD">0</td><td class="ColE"><a name="gg.tblur.accum">Accumulate color data rather than discarding it.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.tblur.accum.amount</td><td class="ColB">real</td><td class="ColC">0 <i>through</i> 100</td><td class="ColD">50</td><td class="ColE"><a name="gg.tblur.accum.amount">Blur amount in accumulation mode, specified in percentage of accumulation buffer to mix with the current frame.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.videoip</td><td class="ColB">enum</td><td class="ColC">0<br>1<br>x<br>y</td><td class="ColD">0</td><td class="ColE"><a name="gg.videoip">Enable (bi)linear interpolation.</a><ul><li><b>0</b> - Disabled<br></li><br><li><b>1</b> - Bilinear<br></li><br><li><b>x</b> - Linear (X)<br>Interpolation only on the X axis.</li><br><li><b>y</b> - Linear (Y)<br>Interpolation only on the Y axis.</li></ul></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.xres</td><td class="ColB">integer</td><td class="ColC">0 <i>through</i> 65536</td><td class="ColD">0</td><td class="ColE"><a name="gg.xres">Full-screen horizontal resolution.</a><p>A value of "0" will cause the desktop horizontal resolution to be used.</p></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.xscale</td><td class="ColB">real</td><td class="ColC">0.01 <i>through</i> 256</td><td class="ColD">4.000000</td><td class="ColE"><a name="gg.xscale">Scaling factor for the X axis in windowed mode.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.xscalefs</td><td class="ColB">real</td><td class="ColC">0.01 <i>through</i> 256</td><td class="ColD">1.000000</td><td class="ColE"><a name="gg.xscalefs">Scaling factor for the X axis in fullscreen mode.</a><p>For this settings to have any effect, the "<system>.stretch" setting must be set to "0".</p></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.yres</td><td class="ColB">integer</td><td class="ColC">0 <i>through</i> 65536</td><td class="ColD">0</td><td class="ColE"><a name="gg.yres">Full-screen vertical resolution.</a><p>A value of "0" will cause the desktop vertical resolution to be used.</p></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowA"><td class="ColA">gg.yscale</td><td class="ColB">real</td><td class="ColC">0.01 <i>through</i> 256</td><td class="ColD">4.000000</td><td class="ColE"><a name="gg.yscale">Scaling factor for the Y axis in windowed mode.</a></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
<tr class="RowB"><td class="ColA">gg.yscalefs</td><td class="ColB">real</td><td class="ColC">0.01 <i>through</i> 256</td><td class="ColD">1.000000</td><td class="ColE"><a name="gg.yscalefs">Scaling factor for the Y axis in fullscreen mode.</a><p>For this settings to have any effect, the "<system>.stretch" setting must be set to "0".</p></td></tr><tr><td class="RowSpacer" colspan="5"> </td></tr>
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