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Cyrix lawsuit</span> </div> </a> <ul id="toc-Intel_v._Cyrix_lawsuit-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Cyrix Cx486SLC</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. 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href="https://de.wikipedia.org/wiki/Cyrix_Cx486SLC" title="Cyrix Cx486SLC – German" lang="de" hreflang="de" data-title="Cyrix Cx486SLC" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Cyrix_Cx486SLC" title="Cyrix Cx486SLC – Italian" lang="it" hreflang="it" data-title="Cyrix Cx486SLC" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Cyrix_Cx486SLC" title="Cyrix Cx486SLC – Hungarian" lang="hu" hreflang="hu" data-title="Cyrix Cx486SLC" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a 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div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"486SLC" redirects here. For the unrelated IBM CPU of the same name, see <a href="/wiki/IBM_386SLC#IBM_486SLC" title="IBM 386SLC">IBM 386SLC § IBM 486SLC</a>.</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title">Cyrix Cx486SLC</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg/200px-Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg" decoding="async" width="200" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg/300px-Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/6/67/Cyrix_Cx486SLCe-V25MP_DF7339E_top.jpg 2x" data-file-width="384" data-file-height="384" /></a></span><div class="infobox-caption">Cyrix Cx486SLC Microprocessor</div></td></tr><tr><th colspan="2" class="infobox-header">General information</th></tr><tr><th scope="row" class="infobox-label">Launched</th><td class="infobox-data">May 1992</td></tr><tr><th scope="row" class="infobox-label">Marketed by</th><td class="infobox-data"><a href="/wiki/Cyrix" title="Cyrix">Cyrix</a>, <a href="/wiki/Texas_Instruments" title="Texas Instruments">Texas Instruments</a></td></tr><tr><th scope="row" class="infobox-label">Designed by</th><td class="infobox-data">Cyrix</td></tr><tr><th scope="row" class="infobox-label">Common manufacturer</th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"> <ul><li>Texas Instruments</li> <li>SGS-Thomson</li></ul> </div></li></ul></div></td></tr><tr><th colspan="2" class="infobox-header">Performance</th></tr><tr><th scope="row" class="infobox-label">Max. <a href="/wiki/Central_processing_unit" title="Central processing unit">CPU</a> <a href="/wiki/Clock_rate" title="Clock rate">clock rate</a></th><td class="infobox-data">20 MHz to 50 MHz</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Front-side_bus" title="Front-side bus">FSB</a> speeds</th><td class="infobox-data">20 MHz to 40 MHz</td></tr><tr><th scope="row" class="infobox-label">Data width</th><td class="infobox-data">16</td></tr><tr><th scope="row" class="infobox-label">Address width</th><td class="infobox-data">24</td></tr><tr><th colspan="2" class="infobox-header">Cache</th></tr><tr><th scope="row" class="infobox-label">L1 <a href="/wiki/CPU_cache" title="CPU cache">cache</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"> <ul><li>1 KB (Cx486)</li> <li>8 KB (TI486SXLC)</li></ul> </div></td></tr><tr><th colspan="2" class="infobox-header">Architecture and classification</th></tr><tr><th scope="row" class="infobox-label">Application</th><td class="infobox-data">Desktop</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Instruction_set_architecture" title="Instruction set architecture">Instruction set</a></th><td class="infobox-data"><a href="/wiki/X86-16" class="mw-redirect" title="X86-16">x86-16</a>, <a href="/wiki/IA-32" title="IA-32">IA-32</a></td></tr><tr><th colspan="2" class="infobox-header">Physical specifications</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Multi-core_processor" title="Multi-core processor">Cores</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>1</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Co-processor" class="mw-redirect" title="Co-processor">Co-processor</a></th><td class="infobox-data">287, 387SX</td></tr><tr><th colspan="2" class="infobox-header">History</th></tr><tr><th scope="row" class="infobox-label">Successor</th><td class="infobox-data"><a href="/wiki/Cyrix_Cx486" title="Cyrix Cx486">Cyrix Cx486</a></td></tr></tbody></table> <p>The <b>Cyrix Cx486SLC</b> is a x86 microprocessor that was developed by <a href="/wiki/Cyrix" title="Cyrix">Cyrix</a>. It was one of Cyrix's first <a href="/wiki/Central_processing_unit" title="Central processing unit">CPU</a> offerings, released after years of selling <a href="/wiki/Floating-point_unit" title="Floating-point unit">math coprocessors</a> that competed with <a href="/wiki/Intel" title="Intel">Intel's</a> units and offered better performance at a comparable or lower price. It was announced in March of 1992,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and released 2 months later in May, with a price of $119.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> It was priced competitively against the <a href="/wiki/Intel" title="Intel">Intel</a> 486SX, causing Intel to lower the price of their chip from $286 to $119 in just days.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Specifications">Specifications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=1" title="Edit section: Specifications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The 486SLC is based on the <a href="/wiki/I386SX" class="mw-redirect" title="I386SX">i386SX</a> bus, and was intended as an entry-level chip to compete with the Intel 386SX and 486SX. <a href="/wiki/STMicroelectronics" title="STMicroelectronics">SGS-Thomson</a> and <a href="/wiki/Texas_Instruments" title="Texas Instruments">Texas Instruments</a> manufactured the 486SLC for Cyrix.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Texas Instruments also sold it under its own name as TX486SLC. Later, Texas Instruments also released their own version of the chip, the TI486SXLC which featured 8KB internal cache vs 1KB in the original Cyrix design.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> These chips went under the name Potomac, and Cyrix would receive full royalties for them.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The similarly named <a href="/wiki/IBM_486SLC" class="mw-redirect" title="IBM 486SLC">IBM 486SLC</a>, 486SLC2, 486SLC3 (16-bit external bus version of IBM 486DLC aka Blue Lightning) and <a href="/wiki/386SLC" class="mw-redirect" title="386SLC">IBM 386SLC</a> are often confused with the Cyrix chips, but are not related and instead based on an Intel CPU core. </p><p>Introduced in May 1992, like the later and more famous <a href="/wiki/Cyrix_Cx5x86" class="mw-redirect" title="Cyrix Cx5x86">Cyrix Cx5x86</a> it was a hybrid CPU, incorporating features of a new CPU (in this case the <a href="/wiki/Intel_80486" class="mw-redirect" title="Intel 80486">Intel 80486</a>) while having a pin out similar to the existing 386SX, enabling existing board designs to be easily modified for the new chip.<sup id="cite_ref-:0_8-0" class="reference"><a href="#cite_note-:0-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> It ran at speeds of 20, 25, 33, and 40 MHz, although it had difficulty running reliably at 40 MHz using some operating systems. In December 1992 Cyrix also released the Cyrix Cx486SLC/e (25, 33 MHz) which offered power management, and a low voltage laptop version, the 3.3v Cyrix Cx486SLC/e-V (20, 25 MHz). In December 1993 Cyrix released a clock doubled version (25/50 MHz) cx486SLC2,<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> as well as a clip-on upgrade for 386SX systems, the cx486SRx2 (16/33, 20/40 & 25/50 MHz).<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>The 486SLC can be described as a 386SX with the 486 instruction set and 1K of onboard <a href="/wiki/L1_cache" class="mw-redirect" title="L1 cache">L1 cache</a> added. Unfortunately it inherited the 386SX's 24-bit address bus (16 MB max. DRAM), and 16-bit datapath which limited its memory bandwidth. Like the 386 and 486SX, it had no on-board <a href="/wiki/X87" title="X87">x87 math coprocessor</a>, but unlike the 486SX, it could make use of an Intel i287, 387SX or compatible <a href="/wiki/X87" title="X87">x87</a> coprocessor. Due to the limitations of the 386SX's bus and its smaller L1 cache, its performance could not compete with the 486SX when the latter was running on a full 32-bit bus.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>The 486SLC was primarily used in very inexpensive low-end <a href="/wiki/Motherboard" title="Motherboard">motherboards</a> and PC clones. Because of its low power consumption, it also saw use in <a href="/wiki/Laptop" title="Laptop">laptops</a>.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> The 486SLC was also available as a 32-bit version based on the i386DX bus, see <a href="/wiki/486DLC" class="mw-redirect" title="486DLC">486DLC</a>. </p> <ul class="gallery mw-gallery-packed"> <li class="gallerybox" style="width: 196px"> <div class="thumb" style="width: 194px;"><span typeof="mw:File"><a href="/wiki/File:Texas_Instruments_TX486SLC.jpg" class="mw-file-description" title="TI486SLC"><img alt="TI486SLC" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Texas_Instruments_TX486SLC.jpg/291px-Texas_Instruments_TX486SLC.jpg" decoding="async" width="194" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/39/Texas_Instruments_TX486SLC.jpg/437px-Texas_Instruments_TX486SLC.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/39/Texas_Instruments_TX486SLC.jpg/583px-Texas_Instruments_TX486SLC.jpg 2x" data-file-width="846" data-file-height="871" /></a></span></div> <div class="gallerytext">TI486SLC</div> </li> <li class="gallerybox" style="width: 227.33333333333px"> <div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"><a href="/wiki/File:Evergreen_Technologies_Inc.,_486_SuperChip_(16118395508)_(cropped).jpg" class="mw-file-description" title="Cyrix Cx486SLC with 87SLC co-processor (top view)"><img alt="Cyrix Cx486SLC with 87SLC co-processor (top view)" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg/338px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg" decoding="async" width="226" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg/506px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg/675px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816118395508%29_%28cropped%29.jpg 2x" data-file-width="2270" data-file-height="2018" /></a></span></div> <div class="gallerytext">Cyrix Cx486SLC with 87SLC co-processor (top view)</div> </li> <li class="gallerybox" style="width: 227.33333333333px"> <div class="thumb" style="width: 225.33333333333px;"><span typeof="mw:File"><a href="/wiki/File:Evergreen_Technologies_Inc.,_486_SuperChip_(16305942855)_(cropped).jpg" class="mw-file-description" title="Cyrix Cx486SLC with 87SLC co-processor (bottom view)"><img alt="Cyrix Cx486SLC with 87SLC co-processor (bottom view)" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg/338px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg" decoding="async" width="226" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg/506px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/37/Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg/675px-Evergreen_Technologies_Inc.%2C_486_SuperChip_%2816305942855%29_%28cropped%29.jpg 2x" data-file-width="2270" data-file-height="2018" /></a></span></div> <div class="gallerytext">Cyrix Cx486SLC with 87SLC co-processor (bottom view)</div> </li> <li class="gallerybox" style="width: 200px"> <div class="thumb" style="width: 198px;"><span typeof="mw:File"><a href="/wiki/File:KL_TI_486SXLC.jpg" class="mw-file-description" title="TI486SXLC"><img alt="TI486SXLC" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/KL_TI_486SXLC.jpg/297px-KL_TI_486SXLC.jpg" decoding="async" width="198" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/KL_TI_486SXLC.jpg/445px-KL_TI_486SXLC.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e9/KL_TI_486SXLC.jpg/594px-KL_TI_486SXLC.jpg 2x" data-file-width="879" data-file-height="888" /></a></span></div> <div class="gallerytext">TI486SXLC</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Versions">Versions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=2" title="Edit section: Versions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Cx486SLC/SLC2"><span id="Cx486SLC.2FSLC2"></span>Cx486SLC/SLC2</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=3" title="Edit section: Cx486SLC/SLC2"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The base 486SLC, which had speeds of 20, 25, 33, and 40 MHz with 1 KB of cache and a 16-bit bus. A later version, the 486SLC2, ran at 50 MHz. </p> <table class="wikitable"> <tbody><tr> <th>Model </th> <th>Bus Speed </th> <th>Frequency </th> <th>Cache </th> <th>Voltage </th> <th>Notes </th></tr> <tr> <td><b>Cx486SLC-20</b> </td> <td>20 MHz </td> <td>20 MHz </td> <td>1 KB </td> <td>5 V </td> <td>100-pin <a href="/wiki/Quad_flat_package" title="Quad flat package">quad flat package</a> (QFP). </td></tr> <tr> <td><b>Cx486SLC/E-V20</b> </td> <td>20 MHz </td> <td>20 MHz </td> <td>1 kB </td> <td>3.3 V </td> <td>Advanced power management, low voltage, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC-25MP</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 kB </td> <td>5 V </td> <td>100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC/E-25-MP</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 kB </td> <td>5 V </td> <td>Advanced power management, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC/E-25-QP</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 kB </td> <td>5 V </td> <td>Advanced power management, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC/E-V25MP</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 kB </td> <td>3.3 V </td> <td>Advanced power management, low voltage, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC-33MP</b> </td> <td>33 MHz </td> <td>33 MHz </td> <td>1 kB </td> <td>5 V </td> <td>100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC/E-33-MP</b> </td> <td>33 MHz </td> <td>33 MHz </td> <td>1 kB </td> <td>5 V </td> <td>Advanced power management, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC/E-40-MP</b> </td> <td>40 MHz </td> <td>40 MHz </td> <td>1 kB </td> <td>5 V </td> <td>Advanced power management, 100-pin QFP. </td></tr> <tr> <td><b>Cx486SLC2-50</b> </td> <td>25 MHz </td> <td>50 MHz </td> <td>1 kB </td> <td>5 V </td> <td>100-pin QFP. </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="TI486SLC">TI486SLC</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=4" title="Edit section: TI486SLC"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>TI's rebranded version of the Cx486SLC. </p> <table class="wikitable"> <caption><a rel="nofollow" class="external text" href="https://archive.org/details/bitsavers_tiTI486199rReferenceGuide_13259023/page/n21/mode/2up?q=ti486slc&view=theater">TI 486SLC/486DLC Reference Guide</a> </caption> <tbody><tr> <th>Model </th> <th>Bus Speed </th> <th>Frequency </th> <th>Cache </th> <th>Voltage </th> <th>Notes </th></tr> <tr> <td><b>TI486SLC/E</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 KB </td> <td>5 V </td> <td>Advanced power management, 100-pin <a href="/wiki/Quad_flat_package" title="Quad flat package">QFP</a>. </td></tr> <tr> <td><b>TI486SLC/E-33PAF</b> </td> <td>33 MHz </td> <td>33 MHz </td> <td>1 KB </td> <td>5 V </td> <td>Advanced power management, 100-pin QFP. </td></tr> <tr> <td><b>TI486SLC/E-V</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>1 KB </td> <td>3 V </td> <td>Advanced power management, low voltage, 100-pin QFP. </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="TI486SXLC/SXLC2"><span id="TI486SXLC.2FSXLC2"></span>TI486SXLC/SXLC2</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=5" title="Edit section: TI486SXLC/SXLC2"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The TI486SXLC/SXLC was Texas Instrument's version of the Cx486SLC. They had 8 KB of cache over the original 1 KB, a 32-bit internal data bus, and supported clock-doubling. </p> <table class="wikitable"> <caption><a rel="nofollow" class="external text" href="https://usermanual.wiki/Document/1994TI486SXLCandTI486SXLMicroprocessorsReferenceGuide.1822911953/view">TI 486SXLC/486SXL Reference Guide</a> </caption> <tbody><tr> <th>Model </th> <th>Bus Speed </th> <th>Frequency </th> <th>Cache </th> <th>Voltage </th> <th>Notes </th></tr> <tr> <td><b>TI486SXLC-V25-PJF</b> </td> <td>25 MHz </td> <td>25 MHz </td> <td>8 kB </td> <td>3.3 V </td> <td>Low power version of SXLC, 100-pin <a href="/wiki/Quad_flat_package" title="Quad flat package">QFP</a> for compatibility with 486SLC. </td></tr> <tr> <td><b>TI486SXLC-040-PJF</b> </td> <td>20-40 MHz† </td> <td>40 MHz </td> <td>8 KB </td> <td>5V </td> <td>100-pin QFP for compatibility with 486SLC. </td></tr> <tr> <td><b>TI486SXLC2-050-PJF</b> </td> <td>25 MHz </td> <td>50 MHz </td> <td>8 kB </td> <td>5 V </td> <td>100-pin QFP for compatibility with 486SLC. </td></tr> <tr> <td colspan="6">† - Can operate at nonclock-doubled 40 MHz or clock-doubled 20/40 MHz. </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Cx486SRx2">Cx486SRx2</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=6" title="Edit section: Cx486SRx2"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable"> <caption><a rel="nofollow" class="external text" href="https://www.farnell.com/datasheets/100667.pdf">Cx486DRx2/Cx486SRx2 Datasheet</a> </caption> <tbody><tr> <th>Model </th> <th>Bus Speed </th> <th>Frequency </th> <th>Cache </th> <th>Voltage </th> <th>Notes </th></tr> <tr> <td><b>Cx486SRx2-25/50</b> </td> <td>25 MHz </td> <td>50 MHz </td> <td>1 kB </td> <td>3.3 V </td> <td>Clip-on upgrade version of the SLC, compatible with the 386SX-16, 20, or 25 MHz. </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Intel_v._Cyrix_lawsuit">Intel v. Cyrix lawsuit</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=7" title="Edit section: Intel v. Cyrix lawsuit"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Before even announcing the chip in March of 1992, Intel filed a lawsuit against Cyrix for patent infringement. Prior to this, Cyrix asked for a declaratory judgement that would prevent Intel from suing Cyrix.<sup id="cite_ref-:0_8-1" class="reference"><a href="#cite_note-:0-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Texas Instruments joined the suit shortly after with an intervene, siding with Cyrix.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>Cyrix used SGS-Thomson as a second manufacturer of the chip, as the company had license to use Intel's patents. Intel however claimed the licence SGS-Thomson had was never intended to allow companies like Cyrix to circumvent Intel patents, which Intel stated was "patent laundering".<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p><p> The lawsuit, which concluded in 1994, stated:</p><blockquote><p><i>Cyrix is entitled to judgment in its favor on its affirmative defenses of patent exhaustion and implied license based on the use or resale of its claim 1 microprocessors purchased from TI and ST.</i><sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></p></blockquote><blockquote></blockquote> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=8" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><b><a href="/wiki/Cyrix_Cx486DLC" title="Cyrix Cx486DLC">Cyrix Cx486DLC</a></b> - Cyrix's next CPU offering, released in June of 1992.</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyrix_Cx486SLC&action=edit&section=9" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation news cs1 cs1-prop-long-vol"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=ioRslYZXVkAC&dq=Cyrix+Cx486SLC&pg=PA8">"It's a 386 - no, it's a 486!"</a>. <i><a href="/wiki/Computerworld" title="Computerworld">Computerworld</a></i>. Vol. 26, No. 13. <a href="/wiki/IDG_Enterprise" class="mw-redirect" title="IDG Enterprise">IDG Enterprise</a>. 30 March 1992. p. 8. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0010-4841">0010-4841</a><span class="reference-accessdate">. Retrieved <span class="nowrap">22 February</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Computerworld&rft.atitle=It%27s+a+386+-+no%2C+it%27s+a+486%21&rft.volume=26%2C+No.+13.&rft.pages=8&rft.date=1992-03-30&rft.issn=0010-4841&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DioRslYZXVkAC%26dq%3DCyrix%2BCx486SLC%26pg%3DPA8&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACyrix+Cx486SLC" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.newspapers.com/image/748935605/?terms=Cyrix%20Cx486SLC&match=1">"Cyrix-Intel market fight heats up with new chip"</a>. <i><a href="/wiki/The_Desert_Sun" title="The Desert Sun">The Desert Sun</a></i>. 31 March 1992<span class="reference-accessdate">. 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Retrieved <span class="nowrap">21 February</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Argus-Leader&rft.atitle=Competition+benefits+consumers%2C+Advancing+technology+produces+good+buys+on+computer+chips&rft.date=1993-04-16&rft_id=https%3A%2F%2Fwww.newspapers.com%2Fimage%2F239878557%2F%3Fterms%3DCyrix%2520Cx486DLC%26match%3D1&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACyrix+Cx486SLC" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://techmonitor.ai/technology/texas_to_make_cyrix_cx486_as_well_as_sgs_thomson">"TEXAS "TO MAKE CYRIX Cx486" AS WELL AS SGS THOMSON"</a>. <i>Tech Monitor</i>. 31 March 1992<span class="reference-accessdate">. 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Vol. 14, no. 20. <a href="/wiki/InfoWorld_Media_Group,_Inc." class="mw-redirect" title="InfoWorld Media Group, Inc.">InfoWorld Media Group, Inc.</a> p. 6. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0199-6649">0199-6649</a><span class="reference-accessdate">. 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Archived from <a rel="nofollow" class="external text" href="https://www.tweaktown.com/reviews/22/via_c3_aka_cyrix_3/index.html">the original</a> on 29 July 2020.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=TweakTown&rft.atitle=VIA+C3+%28AKA+Cyrix+3%29&rft.date=2001-07-05&rft_id=http%3A%2F%2Fwww.tweaktown.com%2Freviews%2F22%2Fvia_c3_aka_cyrix_3%2Findex.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACyrix+Cx486SLC" class="Z3988"></span> Mentions Cyrix Cx486SLC in the Introduction.</li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Cyrix_Cx486SLC&oldid=1239573071">https://en.wikipedia.org/w/index.php?title=Cyrix_Cx486SLC&oldid=1239573071</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Cyrix_x86_microprocessors" title="Category:Cyrix x86 microprocessors">Cyrix x86 microprocessors</a></li><li><a href="/wiki/Category:Computer-related_introductions_in_1992" title="Category:Computer-related introductions in 1992">Computer-related introductions in 1992</a></li><li><a href="/wiki/Category:X86_microarchitectures" title="Category:X86 microarchitectures">X86 microarchitectures</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden category: <ul><li><a href="/wiki/Category:CS1:_long_volume_value" title="Category:CS1: long volume value">CS1: long volume value</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 10 August 2024, at 04:13<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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