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<span>History</span> </div> </a> <button aria-controls="toc-History-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle History subsection</span> </button> <ul id="toc-History-sublist" class="vector-toc-list"> <li id="toc-SE_slot_(Motorola_68000)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#SE_slot_(Motorola_68000)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>SE slot (Motorola 68000)</span> </div> </a> <ul id="toc-SE_slot_(Motorola_68000)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IIci_cache_slot_(Motorola_68030)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IIci_cache_slot_(Motorola_68030)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>IIci cache slot (Motorola 68030)</span> </div> </a> <ul id="toc-IIci_cache_slot_(Motorola_68030)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IIsi,_SE/30_slot_(Motorola_68030)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IIsi,_SE/30_slot_(Motorola_68030)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>IIsi, SE/30 slot (Motorola 68030)</span> </div> </a> <ul id="toc-IIsi,_SE/30_slot_(Motorola_68030)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IIfx_PDS_(Motorola_68030)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IIfx_PDS_(Motorola_68030)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>IIfx PDS (Motorola 68030)</span> </div> </a> <ul id="toc-IIfx_PDS_(Motorola_68030)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-LC_slot_(Motorola_68020/68030)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#LC_slot_(Motorola_68020/68030)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>LC slot (Motorola 68020/68030)</span> </div> </a> <ul id="toc-LC_slot_(Motorola_68020/68030)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Quadra_PDS_(Motorola_68040)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Quadra_PDS_(Motorola_68040)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6</span> <span>Quadra PDS (Motorola 68040)</span> </div> </a> <ul id="toc-Quadra_PDS_(Motorola_68040)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Duo_Dock_connector_(Motorola_68030_/_NuBus)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Duo_Dock_connector_(Motorola_68030_/_NuBus)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.7</span> <span>Duo Dock connector (Motorola 68030 / NuBus)</span> </div> </a> <ul id="toc-Duo_Dock_connector_(Motorola_68030_/_NuBus)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Power_Macintosh_PDS_(PowerPC_601)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Power_Macintosh_PDS_(PowerPC_601)"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.8</span> <span>Power Macintosh PDS (PowerPC 601)</span> </div> </a> <ul id="toc-Power_Macintosh_PDS_(PowerPC_601)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-PowerPC_daughtercard_slot" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#PowerPC_daughtercard_slot"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.9</span> <span>PowerPC daughtercard slot</span> </div> </a> <ul id="toc-PowerPC_daughtercard_slot-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-PowerPC_cache_slot" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#PowerPC_cache_slot"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.10</span> <span>PowerPC cache slot</span> </div> </a> <ul id="toc-PowerPC_cache_slot-sublist" class="vector-toc-list"> </ul> </li> </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">3</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">4</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>External links</span> </div> </a> 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href="https://de.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – German" lang="de" hreflang="de" data-title="Processor Direct Slot" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – Spanish" lang="es" hreflang="es" data-title="Processor Direct Slot" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – French" lang="fr" hreflang="fr" data-title="Processor Direct Slot" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – Italian" lang="it" hreflang="it" data-title="Processor Direct Slot" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – Dutch" lang="nl" hreflang="nl" data-title="Processor Direct Slot" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – Japanese" lang="ja" hreflang="ja" data-title="Processor Direct Slot" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Processor_Direct_Slot" title="Processor Direct Slot – Finnish" lang="fi" hreflang="fi" data-title="Processor Direct Slot" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q541370#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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multiple issues.</b> Please help <b><a href="/wiki/Special:EditPage/Processor_Direct_Slot" title="Special:EditPage/Processor Direct Slot">improve it</a></b> or discuss these issues on the <b><a href="/wiki/Talk:Processor_Direct_Slot" title="Talk:Processor Direct Slot">talk page</a></b>. <small><i>(<a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove these messages</a>)</i></small> <div class="mw-collapsible-content"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Processor_Direct_Slot" title="Special:EditPage/Processor Direct Slot">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Processor+Direct+Slot%22">"Processor Direct Slot"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Processor+Direct+Slot%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Processor+Direct+Slot%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Processor+Direct+Slot%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Processor+Direct+Slot%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Processor+Direct+Slot%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">April 2023</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-More_footnotes_needed plainlinks metadata ambox ambox-style ambox-More_footnotes_needed" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/40px-Text_document_with_red_question_mark.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/60px-Text_document_with_red_question_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/80px-Text_document_with_red_question_mark.svg.png 2x" data-file-width="48" data-file-height="48" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article includes a list of <a href="/wiki/Wikipedia:Citing_sources#General_references" title="Wikipedia:Citing sources">general references</a>, but <b>it lacks sufficient corresponding <a href="/wiki/Wikipedia:Citing_sources#Inline_citations" title="Wikipedia:Citing sources">inline citations</a></b>.<span class="hide-when-compact"> Please help to <a href="/wiki/Wikipedia:WikiProject_Reliability" title="Wikipedia:WikiProject Reliability">improve</a> this article by <a href="/wiki/Wikipedia:When_to_cite" title="Wikipedia:When to cite">introducing</a> more precise citations.</span> <span class="date-container"><i>(<span class="date">April 2023</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> </div> </div><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:LC-PDS-Ethernet-Card.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/LC-PDS-Ethernet-Card.jpg/250px-LC-PDS-Ethernet-Card.jpg" decoding="async" width="250" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/LC-PDS-Ethernet-Card.jpg/375px-LC-PDS-Ethernet-Card.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/13/LC-PDS-Ethernet-Card.jpg/500px-LC-PDS-Ethernet-Card.jpg 2x" data-file-width="1446" data-file-height="865" /></a><figcaption>LC PDS Ethernet card. PDS connector is at bottom left of photo. The card was mounted parallel to the main logic board, unlike most computer busses in which cards are inserted at right angles to the motherboard.</figcaption></figure> <p>A <b>processor direct slot</b> (<b>PDS</b>) is a slot incorporated into many older <a href="/wiki/Macintosh" class="mw-redirect" title="Macintosh">Macintosh</a> models that allowed direct access to the signal pins of a CPU, similar to the functionality of a <a href="/wiki/Local_bus" title="Local bus">local bus</a> in <a href="/wiki/Personal_computer" title="Personal computer">PCs</a>. This would result in much higher speeds than having to go through a bus layer, such as <a href="/wiki/NuBus" title="NuBus">NuBus</a>, which typically ran at a slower 10 MHz speed.<sup id="cite_ref-lowendmac-iici_1-0" class="reference"><a href="#cite_note-lowendmac-iici-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Typically, if a machine had bus expansion slots it would feature multiple bus expansions slots. However, there was never more than one PDS slot, as rather than providing a sophisticated communication protocol with <i>arbitration</i> between different bits of hardware that might be trying to use the communication channel at the same time, the PDS slot, for the most part, just gave direct access to signal pins on the CPU, making it closer in nature to a <a href="/wiki/Local_bus" title="Local bus">local bus</a>. </p><p>Thus, PDS slots tended to be CPU-specific, and therefore a card designed for the PDS slot in the <a href="/wiki/Motorola_68030" title="Motorola 68030">Motorola 68030</a>-based <a href="/wiki/Macintosh_SE/30" title="Macintosh SE/30">Macintosh SE/30</a>, for example, would not work in the <a href="/wiki/Motorola_68040" title="Motorola 68040">Motorola 68040</a>-based <a href="/wiki/Macintosh_Quadra_700" title="Macintosh Quadra 700">Quadra 700</a>. </p><p>The one notable exception to this was the PDS design for the original <a href="/wiki/Motorola_68020" title="Motorola 68020">Motorola 68020</a>-based <a href="/wiki/Macintosh_LC" title="Macintosh LC">Macintosh LC</a>. This was Apple's first attempt at a "low-cost" Mac, and it was such a success that, when subsequent models replaced the CPU with a 68030, a 68040, and later a <a href="/wiki/PowerPC" title="PowerPC">PowerPC</a> processor, Apple found methods to keep the PDS slot compatible with the original LC, so that the same expansion cards would continue to work. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="SE_slot_(Motorola_68000)"><span id="SE_slot_.28Motorola_68000.29"></span>SE slot (Motorola 68000)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=3" title="Edit section: SE slot (Motorola 68000)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The SE "System Expansion" slot, introduced in the <a href="/wiki/Macintosh_SE" title="Macintosh SE">Macintosh SE</a> in <a href="/wiki/1987" title="1987">1987</a>, was the first processor direct slot, using a 96-pin Euro-DIN connector to interface with the <a href="/wiki/Motorola_68000" title="Motorola 68000">Motorola 68000</a> processor. This slot was also used in the <a href="/wiki/Macintosh_Portable" title="Macintosh Portable">Macintosh Portable</a>.<sup id="cite_ref-lowendmac-pds_2-0" class="reference"><a href="#cite_note-lowendmac-pds-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="IIci_cache_slot_(Motorola_68030)"><span id="IIci_cache_slot_.28Motorola_68030.29"></span>IIci cache slot (Motorola 68030)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=4" title="Edit section: IIci cache slot (Motorola 68030)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The L2 <a href="/wiki/Cache_(computing)" title="Cache (computing)">cache</a> slot of the <a href="/wiki/Macintosh_IIci" title="Macintosh IIci">Macintosh IIci</a>, introduced in <a href="/wiki/1989" title="1989">1989</a>, was a <a href="/wiki/32-bit" class="mw-redirect" title="32-bit">32-bit</a> version of a PDS which used a 120-pin Euro-DIN connector to support the <a href="/wiki/Motorola_68030" title="Motorola 68030">Motorola 68030</a> processor. This slot also appeared in the <a href="/wiki/Macintosh_IIvi" title="Macintosh IIvi">IIvi</a>, and <a href="/wiki/Macintosh_IIvx" title="Macintosh IIvx">IIvx</a>. These allowed for 3rd party companies, such as <a href="/wiki/DayStar_Digital" title="DayStar Digital">DayStar Digital</a>, to develop processor upgrades that did not require the removal of the CPU.<sup id="cite_ref-lowendmac-iici_1-1" class="reference"><a href="#cite_note-lowendmac-iici-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The IIci cache slot is different from the other PDS slot as it doesn't have provision for external connectors,<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> and it does not include an interrupt request signal, thus limiting its use. Its pin configuration is also completely different from the one in most later MC68030-based non-LC Macintoshes.<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> </p> <div class="mw-heading mw-heading3"><h3 id="IIsi,_SE/30_slot_(Motorola_68030)"><span id="IIsi.2C_SE.2F30_slot_.28Motorola_68030.29"></span>IIsi, SE/30 slot (Motorola 68030)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=5" title="Edit section: IIsi, SE/30 slot (Motorola 68030)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Macintosh_SE/30" title="Macintosh SE/30">Macintosh SE/30</a> included a PDS slot that uses the same 120-pin Euro-Din connector as the IIci, but a different pin configuration.<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> The primary clock is the 16 MHz clock for the CPU. Unlike the IIci cache slot, it includes three interrupt request signals. There is also provision in the case for external connectors, so it was commonly used for graphic or network devices. The <a href="/wiki/Macintosh_IIsi" title="Macintosh IIsi">Macintosh IIsi</a> included a motherboard slot very similar to the SE/30,<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> although clocked at 20 MHz like the onboard MC68030. This slot was not intended for direct use, Apple instead offered two adapter cards <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> with a second connector mounted at a right angle (so the board would be parallel to the motherboard). One card provided a <a href="/wiki/NuBus" title="NuBus">NuBus</a> slot, while the other was essentially a pass-though configuration enabling a slot very similar to the IIsi, but with only one interrupt signal supported. Both cards also included an MC68882 FPU, which was not present on the IIsi motherboard. </p> <div class="mw-heading mw-heading3"><h3 id="IIfx_PDS_(Motorola_68030)"><span id="IIfx_PDS_.28Motorola_68030.29"></span>IIfx PDS (Motorola 68030)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=6" title="Edit section: IIfx PDS (Motorola 68030)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Macintosh_IIfx" title="Macintosh IIfx">Macintosh IIfx</a>, introduced in 1990, included a PDS that was almost identical to the SE/30 and IIsi,<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> but not entirely. In particular, the clock signal is running at 20 MHz like the IIsi but the CPU is running at 40 MHz. The clock signal is also on a different pin from the IIsi and SE/30. Unlike other PDS, the connections to the processor signals are not direct, with intermediate buffering needed to handle the different clocks based on the physical address requested - some address would be accessed with the 20 MHz clock, and some other with the (not directly available on the slot) 40 MHz CPU clock ("fast slot space").<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> The physical space available for the board was also different from the SE/30 and IIsi. </p> <div class="mw-heading mw-heading3"><h3 id="LC_slot_(Motorola_68020/68030)"><span id="LC_slot_.28Motorola_68020.2F68030.29"></span>LC slot (Motorola 68020/68030)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=7" title="Edit section: LC slot (Motorola 68020/68030)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The LC slot, introduced in <a href="/wiki/1990" title="1990">1990</a>, began as a PDS for the <a href="/wiki/Motorola_68020" title="Motorola 68020">Motorola 68020</a> / <a href="/wiki/68030" class="mw-redirect" title="68030">68030</a> processors in the <a href="/wiki/Macintosh_LC" title="Macintosh LC">Macintosh LC</a> / <a href="/wiki/Macintosh_LC_II" title="Macintosh LC II">LC II</a>. It only supported the asynchronous cycle of the MC68020, and did not connect all address signals, though it did connect all 32 data signals.<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> The 96-pin Euro-DIN connector is similar to the SE slot connector, but the two are completely incompatible. Latter models added 18 more pins through a notched in-line extension to support the full MC68030 bus (synchronous cycle, all address lines, clock both from the CPU and backward-compatible 16 MHz), while retaining backwards compatibility with older cards. This configuration proved to be so popular for Apple's <a href="/wiki/Performa" class="mw-redirect" title="Performa">Performa</a> line that later 68040 such as the <a href="/wiki/Macintosh_LC_475" class="mw-redirect" title="Macintosh LC 475">Macintosh LC 475</a> and <a href="/wiki/PowerPC" title="PowerPC">PowerPC</a>-based versions were essentially emulating the 68030 pin signals for the LC slots that they inherited.<sup id="cite_ref-lowendmac-pds_2-1" class="reference"><a href="#cite_note-lowendmac-pds-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-apple-maclciii_11-0" class="reference"><a href="#cite_note-apple-maclciii-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Quadra_PDS_(Motorola_68040)"><span id="Quadra_PDS_.28Motorola_68040.29"></span>Quadra PDS (Motorola 68040)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=8" title="Edit section: Quadra PDS (Motorola 68040)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Macintosh_Quadra" title="Macintosh Quadra">Macintosh Quadra</a> series was introduced in <a href="/wiki/1991" title="1991">1991</a> with a new PDS for the <a href="/wiki/Motorola_68040" title="Motorola 68040">Motorola 68040</a> processor which was in-line with one of the <a href="/wiki/NuBus" title="NuBus">NuBus</a> slots. The <a href="/wiki/Macintosh_Quadra_605" title="Macintosh Quadra 605">Quadra 605</a> and <a href="/wiki/Macintosh_Quadra_630" title="Macintosh Quadra 630">Quadra 630</a> were exceptions which used the full 114-pins version of the LC slot. Both allowed for <a href="/wiki/PowerPC" title="PowerPC">PowerPC</a> upgrades, including through the "Ready for PowerPC upgrade" program, using Apple's <a href="/wiki/Macintosh_Processor_Upgrade_Card" title="Macintosh Processor Upgrade Card">Macintosh Processor Upgrade Card</a>.<sup id="cite_ref-lowendmac-pds_2-2" class="reference"><a href="#cite_note-lowendmac-pds-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Duo_Dock_connector_(Motorola_68030_/_NuBus)"><span id="Duo_Dock_connector_.28Motorola_68030_.2F_NuBus.29"></span>Duo Dock connector (Motorola 68030 / NuBus)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=9" title="Edit section: Duo Dock connector (Motorola 68030 / NuBus)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/PowerBook_Duo" title="PowerBook Duo">PowerBook Duo</a> line was introduced in <a href="/wiki/1992" title="1992">1992</a> with a unique <a href="/wiki/68030" class="mw-redirect" title="68030">68030</a>-based connector that could allow the subnotebook logic board to communicate with an array of desktop docking systems, some of which could be upgraded with <a href="/wiki/Floating-point_unit" title="Floating-point unit">floating-point units</a>. Because of the complexity of larger <a href="/wiki/Duo_Dock" class="mw-redirect" title="Duo Dock">Duo Docks</a>, <a href="/wiki/NuBus" title="NuBus">NuBus</a> was used to manage parts of the subsystems.<sup id="cite_ref-lowendmac-pds_2-3" class="reference"><a href="#cite_note-lowendmac-pds-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Power_Macintosh_PDS_(PowerPC_601)"><span id="Power_Macintosh_PDS_.28PowerPC_601.29"></span>Power Macintosh PDS (PowerPC 601)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=10" title="Edit section: Power Macintosh PDS (PowerPC 601)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>First generation <a href="/wiki/Power_Macintosh" title="Power Macintosh">Power Macintosh</a> systems with <a href="/wiki/NuBus" title="NuBus">NuBus</a> architecture, such as the <a href="/wiki/Power_Macintosh_6100" title="Power Macintosh 6100">6100</a>, <a href="/wiki/Power_Macintosh_7100" title="Power Macintosh 7100">7100</a>, and <a href="/wiki/Power_Macintosh_8100" title="Power Macintosh 8100">8100</a>, included a PDS that was used for high-speed AV cards. It was later used by third-party manufacturers to support <a href="/wiki/PowerPC_G3" class="mw-redirect" title="PowerPC G3">PowerPC G3</a> and <a href="/wiki/PowerPC_G4" title="PowerPC G4">G4</a> upgrades. </p> <div class="mw-heading mw-heading3"><h3 id="PowerPC_daughtercard_slot">PowerPC daughtercard slot</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=11" title="Edit section: PowerPC daughtercard slot"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>High-end second generation <a href="/wiki/Power_Macintosh" title="Power Macintosh">Power Macintosh</a> systems with <a href="/wiki/Peripheral_Component_Interconnect" title="Peripheral Component Interconnect">PCI</a> architecture, such as the <a href="/wiki/Power_Macintosh_7500" title="Power Macintosh 7500">7500</a> through <a href="/wiki/Power_Macintosh_9600" title="Power Macintosh 9600">9600</a>, had their <a href="/wiki/PowerPC_601" class="mw-redirect" title="PowerPC 601">PowerPC 601</a> and <a href="/wiki/PowerPC_604" class="mw-redirect" title="PowerPC 604">604</a> processors on daughtercards which could be swapped out for <a href="/wiki/PowerPC_G3" class="mw-redirect" title="PowerPC G3">PowerPC G3</a> and <a href="/wiki/PowerPC_G4" title="PowerPC G4">G4</a> upgrades. </p> <div class="mw-heading mw-heading3"><h3 id="PowerPC_cache_slot">PowerPC cache slot</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=12" title="Edit section: PowerPC cache slot"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Mid-range <a href="/wiki/Power_Macintosh" title="Power Macintosh">Power Macintosh</a> systems based on <a href="/wiki/PowerPC_603e" class="mw-redirect" title="PowerPC 603e">PowerPC 603e</a> processors with <a href="/wiki/Peripheral_Component_Interconnect" title="Peripheral Component Interconnect">PCI</a> architecture, such as the <a href="/wiki/Power_Macintosh_5400" title="Power Macintosh 5400">5400</a>, <a href="/wiki/Power_Macintosh_5500" title="Power Macintosh 5500">5500</a>, and <a href="/wiki/Power_Macintosh_6360" class="mw-redirect" title="Power Macintosh 6360">6360</a> through <a href="/wiki/Power_Macintosh_6500" title="Power Macintosh 6500">6500</a>, featured an L2 <a href="/wiki/Cache_(computing)" title="Cache (computing)">cache</a> slot which provided direct access to the CPU. This allowed enterprising third-party manufacturers to build <a href="/wiki/PowerPC_G3" class="mw-redirect" title="PowerPC G3">PowerPC G3</a> upgrades for this slot. </p><p>More recent Macs have such high processor speeds that a PDS would not be practical and instead adopted <a href="/wiki/PCIe" class="mw-redirect" title="PCIe">PCIe</a> and <a href="/wiki/Thunderbolt_(interface)" title="Thunderbolt (interface)">Thunderbolt (interface)</a>.<sup id="cite_ref-appleinsider-onecable_12-0" class="reference"><a href="#cite_note-appleinsider-onecable-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> The last implementation resembling such a slot by Apple is the processor tray connector in the 2009 to 2012 <a href="/wiki/Mac_Pro" title="Mac Pro">Mac Pros</a>. More recent models have had <a href="/wiki/Intel" title="Intel">Intel</a> Xeon processors socketed directly to the logic board. </p> <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=Processor_Direct_Slot&action=edit&section=13" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Peripheral_Component_Interconnect" title="Peripheral Component Interconnect">PCI</a></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=Processor_Direct_Slot&action=edit&section=14" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span typeof="mw:File"><a href="/wiki/File:CC_BY-SA_icon.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e5/CC_BY-SA_icon.svg/50px-CC_BY-SA_icon.svg.png" decoding="async" width="50" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e5/CC_BY-SA_icon.svg/75px-CC_BY-SA_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e5/CC_BY-SA_icon.svg/100px-CC_BY-SA_icon.svg.png 2x" data-file-width="88" data-file-height="31" /></a></span> Some of the text was originally copied from <a rel="nofollow" class="external text" href="https://apple.fandom.com/wiki/Processor_direct_slot">Processor direct slot</a> at Apple Wiki, which is released under a <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-Share Alike 3.0 (Unported) (CC-BY-SA 3.0) license</a>.</li> <li>Apple Computer, Inc. (1992). "Designing Cards and Drivers for the Macintosh Family, Third Edition" (DCDMF3). ISBN 0-201-60855-3.</li></ul> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-lowendmac-iici-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-lowendmac-iici_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-lowendmac-iici_1-1"><sup><i><b>b</b></i></sup></a></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 web cs1"><a rel="nofollow" class="external text" href="https://lowendmac.com/1989/mac-iici/">"Mac IIci"</a>. <i>lowendmac.com</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220903213221/https://lowendmac.com/1989/mac-iici/">Archived</a> from the original on 2022-09-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-09-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=lowendmac.com&rft.atitle=Mac+IIci&rft_id=https%3A%2F%2Flowendmac.com%2F1989%2Fmac-iici%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AProcessor+Direct+Slot" class="Z3988"></span></span> </li> <li id="cite_note-lowendmac-pds-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-lowendmac-pds_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-lowendmac-pds_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-lowendmac-pds_2-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-lowendmac-pds_2-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://lowendmac.com/2000/pds-the-processor-direct-slot/">"PDS: The Processor Direct Slot"</a>. <i>lowendmac.com</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220903213239/https://lowendmac.com/2000/pds-the-processor-direct-slot/">Archived</a> from the original on 2022-09-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-09-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=lowendmac.com&rft.atitle=PDS%3A+The+Processor+Direct+Slot&rft_id=https%3A%2F%2Flowendmac.com%2F2000%2Fpds-the-processor-direct-slot%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AProcessor+Direct+Slot" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">DCDMF3, p. 529.</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">DCDMF3, p. 522.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">DCDMF3, p. 318.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">DCDMF3, p. 360.</span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text">DCDMF3, p. 359.</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text">DCDMF3, p. 329.</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">DCDMF3, p. 355.</span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">DCDMF3, p. 305.</span> </li> <li id="cite_note-apple-maclciii-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-apple-maclciii_11-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation techreport cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20040721012340/http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs-68K_Desktop/Mac_LC_III.pdf"><i>Macintosh LC III Developer Note</i></a> <span class="cs1-format">(PDF)</span> (Technical report). 2000. Archived from <a rel="nofollow" class="external text" href="http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs-68K_Desktop/Mac_LC_III.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 21 July 2004<span class="reference-accessdate">. Retrieved <span class="nowrap">3 September</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=report&rft.btitle=Macintosh+LC+III+Developer+Note&rft.date=2000&rft_id=http%3A%2F%2Fdeveloper.apple.com%2Fdocumentation%2FHardware%2FDeveloper_Notes%2FMacintosh_CPUs-68K_Desktop%2FMac_LC_III.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AProcessor+Direct+Slot" class="Z3988"></span></span> </li> <li id="cite_note-appleinsider-onecable-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-appleinsider-onecable_12-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://appleinsider.com/articles/18/07/04/a-brief-history-of-apples-retired-connectors-and-ports-over-the-years">"One cable to rule them all: a look at Apple's retired connectors through the years"</a>. <i>AppleInsider</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220903212758/https://appleinsider.com/articles/18/07/04/a-brief-history-of-apples-retired-connectors-and-ports-over-the-years">Archived</a> from the original on 2022-09-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-09-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=AppleInsider&rft.atitle=One+cable+to+rule+them+all%3A+a+look+at+Apple%27s+retired+connectors+through+the+years&rft_id=https%3A%2F%2Fappleinsider.com%2Farticles%2F18%2F07%2F04%2Fa-brief-history-of-apples-retired-connectors-and-ports-over-the-years&rfr_id=info%3Asid%2Fen.wikipedia.org%3AProcessor+Direct+Slot" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Processor_Direct_Slot&action=edit&section=15" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.applefritter.com/taxonomy/term/122">Pictures of several PDS cards</a> at AppleFritter</li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080509063741/http://macfaq.org/hardware/cards.shtml#Q2.6.2">What kind of expansion or upgrade slots does my Mac have?</a> at Mac FAQ</li> <li><a rel="nofollow" class="external text" href="https://apple.fandom.com/wiki/Processor_direct_slot">Notes on PDS variations</a> at Apple Wiki</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=Processor_Direct_Slot&oldid=1250312108">https://en.wikipedia.org/w/index.php?title=Processor_Direct_Slot&oldid=1250312108</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:Macintosh_internals" title="Category:Macintosh internals">Macintosh internals</a></li><li><a href="/wiki/Category:Motherboard_expansion_slot" title="Category:Motherboard expansion slot">Motherboard expansion slot</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_needing_additional_references_from_April_2023" title="Category:Articles needing additional references from April 2023">Articles needing additional references from April 2023</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:Articles_lacking_in-text_citations_from_April_2023" title="Category:Articles lacking in-text citations from April 2023">Articles lacking in-text citations from April 2023</a></li><li><a href="/wiki/Category:All_articles_lacking_in-text_citations" title="Category:All articles lacking in-text citations">All articles lacking in-text citations</a></li><li><a href="/wiki/Category:Articles_with_multiple_maintenance_issues" title="Category:Articles with multiple maintenance issues">Articles with multiple maintenance issues</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 9 October 2024, at 17:39<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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