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class="mw-list-item"><a href="/wiki/Especial:Article_aleatori" title="Carrega una pàgina a l’atzar [x]" accesskey="x"><span>Article a l'atzar</span></a></li><li id="n-Articles-de-qualitat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Articles_de_qualitat"><span>Articles de qualitat</span></a></li> </ul> </div> </div> <div id="p-Comunitat" class="vector-menu mw-portlet mw-portlet-Comunitat" > <div class="vector-menu-heading"> Comunitat </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Portal" title="Sobre el projecte, què podeu fer, on trobareu les coses"><span>Portal viquipedista</span></a></li><li id="n-Agenda-d'actes" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Trobades"><span>Agenda d'actes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Especial:Canvis_recents" title="Una llista dels canvis recents al wiki [r]" accesskey="r"><span>Canvis 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class=""><span>Crea un compte</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Mem%C3%B2ria+de+tors" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o" class=""><span>Inicia la sessió</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Més opcions" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Eines personals" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet 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mw-ui-icon-wikimedia-userAdd"></span> <span>Crea un compte</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Mem%C3%B2ria+de+tors" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Inicia la sessió</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pàgines per a editors no registrats <a href="/wiki/Ajuda:Introducci%C3%B3" aria-label="Vegeu més informació sobre l'edició"><span>més informació</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Història" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Història"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Història</span> </div> </a> <ul id="toc-Història-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Tecnologia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Tecnologia"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Tecnologia</span> </div> </a> <ul id="toc-Tecnologia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fabricació" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Fabricació"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Fabricació</span> </div> </a> <ul id="toc-Fabricació-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vegeu_també" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vegeu_també"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Vegeu també</span> </div> </a> <ul id="toc-Vegeu_també-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="Contingut" 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="Commuta la taula de continguts." > <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">Commuta la taula de continguts.</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">Memòria de tors</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="Vés a un article en una altra llengua. Disponible en 29 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-29" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">29 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B0%D8%A7%D9%83%D8%B1%D8%A9_%D9%85%D8%BA%D9%86%D8%A7%D8%B7%D9%8A%D8%B3%D9%8A%D8%A9_%D8%A7%D9%84%D9%86%D9%88%D8%A7%D8%A9" title="ذاكرة مغناطيسية النواة - àrab" lang="ar" hreflang="ar" data-title="ذاكرة مغناطيسية النواة" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A4%D0%B5%D1%80%D0%B8%D1%82%D0%BD%D0%B0_%D0%BF%D0%B0%D0%BC%D0%B5%D1%82" title="Феритна памет - búlgar" lang="bg" hreflang="bg" data-title="Феритна памет" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Feritov%C3%A1_pam%C4%9B%C5%A5" title="Feritová paměť - txec" lang="cs" hreflang="cs" data-title="Feritová paměť" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Ferritkernelager" title="Ferritkernelager - danès" lang="da" hreflang="da" data-title="Ferritkernelager" data-language-autonym="Dansk" data-language-local-name="danès" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Kernspeicher" title="Kernspeicher - alemany" lang="de" hreflang="de" data-title="Kernspeicher" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Magnetic-core_memory" title="Magnetic-core memory - anglès" lang="en" hreflang="en" data-title="Magnetic-core memory" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Memoria_de_n%C3%BAcleos_magn%C3%A9ticos" title="Memoria de núcleos magnéticos - espanyol" lang="es" hreflang="es" data-title="Memoria de núcleos magnéticos" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Ferriitm%C3%A4lu" title="Ferriitmälu - estonià" lang="et" hreflang="et" data-title="Ferriitmälu" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Nukleo_magnetikozko_memoria" title="Nukleo magnetikozko memoria - basc" lang="eu" hreflang="eu" data-title="Nukleo magnetikozko memoria" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AD%D8%A7%D9%81%D8%B8%D9%87_%D9%85%D8%BA%D9%86%D8%A7%D8%B7%DB%8C%D8%B3%DB%8C" title="حافظه مغناطیسی - persa" lang="fa" hreflang="fa" data-title="حافظه مغناطیسی" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ferriittirengasmuisti" title="Ferriittirengasmuisti - finès" lang="fi" hreflang="fi" data-title="Ferriittirengasmuisti" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/M%C3%A9moire_%C3%A0_tores_magn%C3%A9tiques" title="Mémoire à tores magnétiques - francès" lang="fr" hreflang="fr" data-title="Mémoire à tores magnétiques" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%96%D7%99%D7%9B%D7%A8%D7%95%D7%9F_%D7%9C%D7%99%D7%91%D7%94_%D7%9E%D7%92%D7%A0%D7%98%D7%99%D7%AA" title="זיכרון ליבה מגנטית - hebreu" lang="he" hreflang="he" data-title="זיכרון ליבה מגנטית" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%9A%E0%A5%81%E0%A4%AE%E0%A5%8D%E0%A4%AC%E0%A4%95%E0%A5%80%E0%A4%AF_%E0%A4%95%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%A1_%E0%A4%B8%E0%A5%8D%E0%A4%AE%E0%A5%83%E0%A4%A4%E0%A4%BF" title="चुम्बकीय क्रोड स्मृति - hindi" lang="hi" hreflang="hi" data-title="चुम्बकीय क्रोड स्मृति" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Ferritgy%C5%B1r%C5%B1s_mem%C3%B3ria" title="Ferritgyűrűs memória - hongarès" lang="hu" hreflang="hu" data-title="Ferritgyűrűs memória" data-language-autonym="Magyar" data-language-local-name="hongarès" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Memoria_a_nucleo_magnetico" title="Memoria a nucleo magnetico - italià" lang="it" hreflang="it" data-title="Memoria a nucleo magnetico" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%A3%81%E6%B0%97%E3%82%B3%E3%82%A2%E3%83%A1%E3%83%A2%E3%83%AA" title="磁気コアメモリ - japonès" lang="ja" hreflang="ja" data-title="磁気コアメモリ" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9E%90%EA%B8%B0%EC%BD%94%EC%96%B4_%EB%A9%94%EB%AA%A8%EB%A6%AC" title="자기코어 메모리 - coreà" lang="ko" hreflang="ko" data-title="자기코어 메모리" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Memoria_nuclearis_magnetica" title="Memoria nuclearis magnetica - llatí" lang="la" hreflang="la" data-title="Memoria nuclearis magnetica" data-language-autonym="Latina" data-language-local-name="llatí" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Magnetkjerneminne" title="Magnetkjerneminne - noruec bokmål" lang="nb" hreflang="nb" data-title="Magnetkjerneminne" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pami%C4%99%C4%87_ferrytowa" title="Pamięć ferrytowa - polonès" lang="pl" hreflang="pl" data-title="Pamięć ferrytowa" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Mem%C3%B3ria_de_n%C3%BAcleo_magn%C3%A9tico" title="Memória de núcleo magnético - portuguès" lang="pt" hreflang="pt" data-title="Memória de núcleo magnético" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Memorie_cu_ferite" title="Memorie cu ferite - romanès" lang="ro" hreflang="ro" data-title="Memorie cu ferite" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D0%BC%D1%8F%D1%82%D1%8C_%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D1%8B%D1%85_%D1%81%D0%B5%D1%80%D0%B4%D0%B5%D1%87%D0%BD%D0%B8%D0%BA%D0%B0%D1%85" title="Память на магнитных сердечниках - rus" lang="ru" hreflang="ru" data-title="Память на магнитных сердечниках" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%9C%D0%B0%D0%B3%D0%BD%D0%B8%D1%82%D0%BD%D0%B0%D0%B9_%D1%81%D0%B5%D1%80%D0%B4%D0%B5%D1%87%D0%BD%D0%B8%D0%BA" title="Магнитнай сердечник - iacut" lang="sah" hreflang="sah" data-title="Магнитнай сердечник" data-language-autonym="Саха тыла" data-language-local-name="iacut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/K%C3%A4rnminne" title="Kärnminne - suec" lang="sv" hreflang="sv" data-title="Kärnminne" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Manyetik_%C3%A7ekirdek_bellek" title="Manyetik çekirdek bellek - turc" lang="tr" hreflang="tr" data-title="Manyetik çekirdek bellek" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%B0%D0%BC%27%D1%8F%D1%82%D1%8C_%D0%BD%D0%B0_%D0%BC%D0%B0%D0%B3%D0%BD%D1%96%D1%82%D0%BD%D0%B8%D1%85_%D0%BE%D1%81%D0%B5%D1%80%D0%B4%D1%8F%D1%85" title="Пам'ять на магнітних осердях - ucraïnès" lang="uk" hreflang="uk" data-title="Пам'ять на магнітних осердях" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%A3%81%E8%8A%AF%E8%A8%98%E6%86%B6%E9%AB%94" title="磁芯記憶體 - xinès" lang="zh" hreflang="zh" data-title="磁芯記憶體" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</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/Q839647#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</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="Espais de noms"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Mem%C3%B2ria_de_tors" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussi%C3%B3:Mem%C3%B2ria_de_tors&action=edit&redlink=1" rel="discussion" class="new" title="Discussió sobre el contingut d'aquesta pàgina (encara no existeix) [t]" accesskey="t"><span>Discussió</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > 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data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:KL_CoreMemory.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/KL_CoreMemory.jpg/220px-KL_CoreMemory.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/KL_CoreMemory.jpg/330px-KL_CoreMemory.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/da/KL_CoreMemory.jpg/440px-KL_CoreMemory.jpg 2x" data-file-width="2400" data-file-height="2400" /></a><figcaption>Una placa de "core memory" de 32x32 bits, emmagatzemant 1024 bits</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Magnetic_core_memory_card.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Magnetic_core_memory_card.jpg/220px-Magnetic_core_memory_card.jpg" decoding="async" width="220" height="211" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Magnetic_core_memory_card.jpg/330px-Magnetic_core_memory_card.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Magnetic_core_memory_card.jpg/440px-Magnetic_core_memory_card.jpg 2x" data-file-width="1254" data-file-height="1200" /></a><figcaption>Una placa de 10.8×10.8 cm de "core memory" de 64x64 bits, usada en un <a href="/w/index.php?title=CDC_6600&action=edit&redlink=1" class="new" title="CDC 6600 (encara no existeix)">CDC 6600</a></figcaption></figure> <p>La <b> memòria de tors </b> o <b> memòria de nuclis magnètics </b>, va ser un tipus de <a href="/wiki/Mem%C3%B2ria_principal" title="Memòria principal">memòria principal</a> dels computadors, fins a començaments dels anys 70. La funció d'aquesta memòria era similar a la que realitza la <a href="/wiki/Mem%C3%B2ria_d%27acc%C3%A9s_aleatori" title="Memòria d'accés aleatori">memòria RAM</a> En l'actualitat: és l'espai de treball, per a la <a href="/wiki/CPU" class="mw-redirect" title="CPU">CPU</a>, on es graven els resultats immediats de les operacions que es van realitzant. A diferència de la RAM basada en tecnologies <a href="/wiki/DRAM" title="DRAM">DRAM</a>, es basa en les propietats magnètiques del seu component actiu, el nucli de ferrita i era una memòria no volàtil. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Història"><span id="Hist.C3.B2ria"></span>Història</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Mem%C3%B2ria_de_tors&action=edit&section=1" title="Modifica la secció: Història"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Després de desplaçar altres tecnologies d'emmagatzematge, la memòria de tors va dominar la indústria informàtica durant els anys 50 i 60. Va ser utilitzada de manera extensa en ordinadors i altres dispositius electrònics com les calculadores. <a href="/wiki/Intel" title="Intel">Intel</a> va ser creada amb la idea de convertir la memòria d'<a href="/wiki/Estat_s%C3%B2lid" class="mw-redirect" title="Estat sòlid">estat sòlid</a> en la memòria dominant en la indústria dels computadors. Per 1971, Intel èxit posicionar una memòria tipus <a href="/wiki/DRAM" title="DRAM">DRAM</a> com un dispositiu de bones prestacions i relatiu baix preu copant els mercats de la memòria de nuclis i relegant al passat. </p> <div class="mw-heading mw-heading2"><h2 id="Tecnologia">Tecnologia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Mem%C3%B2ria_de_tors&action=edit&section=2" title="Modifica la secció: Tecnologia"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:MToros.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MToros.JPG/220px-MToros.JPG" decoding="async" width="220" height="142" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MToros.JPG/330px-MToros.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MToros.JPG/440px-MToros.JPG 2x" data-file-width="2404" data-file-height="1548" /></a><figcaption>Matriu de tors de NCR</figcaption></figure><p> El mecanisme de memòria es basa en la <a href="/wiki/Hist%C3%A8resi" title="Histèresi">histèresi</a> de la ferrita. Els tors de ferrita es disposen en una matriu de manera que siguin travessades per dos fils, <b> X </b> i <b> Y </b>, que discorren segons les files i columnes. Per escriure un bit a la memòria s'envia un pols simultàniament per les línies <b> X <sub> i </sub> </b> i <b> Y <sub> j </sub> </b> corresponents. El tor situat en la posició <b> (i, j) </b> es magnetitza en el sentit donat pels polsos. Els altres tors, tant de la fila com de la columna, no varien la seva magnetització, ja que només reben un pols (<b> X </b> o <b> Y </b>), el camp magnètic és insuficient per vèncer la histèresi del tor. </p><p>La dada es llegeix mitjançant un nou fil <b> Z </b>, que recorre tots els tors de la matriu. Escrivim un "0" pel mètode descrit anteriorment, després només el tor <b> (i, j) </b> pot canviar d'estat. Si conté un "0", no canvia, després en la línia Z no es té senyal, però si el tor té un "1", passa a valer "0", el seu sentit de magnetització canvia i indueix un pols en la línia <b> Z </b>, que es llegirà com "un "1". </p><p>Com es veu, el procés descrit destrueix la dada que es llegeix, així en les memòries de tors és necessari <b> reescriure la dada </b> després llegir-la, ("write after read"), com a les memòries <a href="/wiki/DRAM" title="DRAM">DRAM</a> actuals </p><p>Una paraula de n bits, posem 16 bits, necessita 16 matrius com la descrita, amb 16 línies <b> Z </b>, una per bit. </p> <div class="mw-heading mw-heading2"><h2 id="Fabricació"><span id="Fabricaci.C3.B3"></span>Fabricació</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Mem%C3%B2ria_de_tors&action=edit&section=3" title="Modifica la secció: Fabricació"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La fabricació d'aquestes memòries es feia enfilant les línies X, Y i Z en els tors de forma manual. Els tors s'enganxen a un suport, que pot ser una placa de circuit imprès (últims models) o als propis fils X i Y, de rigidesa suficient per suportar el conjunt, que va subjecte a un marc d'on surten les connexions. Finalment és apantallat magnèticament amb una xapa de "mu-metall", habitualment, per tal d'evitar que camps magnètics espuris alterin el contingut de la memòria. </p> <div class="mw-heading mw-heading2"><h2 id="Vegeu_també"><span id="Vegeu_tamb.C3.A9"></span>Vegeu també</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Mem%C3%B2ria_de_tors&action=edit&section=4" title="Modifica la secció: Vegeu també"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Ordinador_de_programa_emmagatzemat" title="Ordinador de programa emmagatzemat">Ordinador de programa emmagatzemat</a></li> <li>Memòria de condensador. (<a href="/w/index.php?title=Atanasov&action=edit&redlink=1" class="new" title="Atanasov (encara no existeix)">Atanasov</a>)</li> <li><a href="/wiki/Mem%C3%B2ria_de_l%C3%ADnia_de_retard" title="Memòria de línia de retard">Línies de retard</a> acústiques</li> <li><a href="/wiki/Mem%C3%B2ria_de_bombolla" title="Memòria de bombolla">Memòria de bombolla</a></li> <li><a href="/wiki/Mem%C3%B2ria_racetrack" title="Memòria racetrack">Memòria racetrack</a></li> <li>Memòria <a href="/wiki/CCD_(sensor)" class="mw-redirect" title="CCD (sensor)">CCD</a></li> <li>Memòria hologràfica</li> <li><a href="/wiki/Selectr%C3%B3" title="Selectró">Selectró</a></li> <li><a href="/wiki/Tub_Williams" title="Tub Williams">Tub Williams</a></li> <li><a href="/wiki/JOHNNIAC" title="JOHNNIAC">JOHNNIAC</a></li> <li><a href="/wiki/Mem%C3%B2ria_de_tambor" title="Memòria de tambor">Memòria de tambor</a></li></ul> <style data-mw-deduplicate="TemplateStyles:r33663753">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}.mw-parser-output .side-box-center{clear:both;margin:auto}}</style><div class="side-box metadata side-box-right plainlinks"> <div class="side-box-flex"> <div class="side-box-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">A <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/P%C3%A0gina_principal?uselang=ca">Wikimedia Commons</a></span> hi ha contingut multimèdia relatiu a: <i><b><a href="https://commons.wikimedia.org/wiki/Category:Core_memory" class="extiw" title="commons:Category:Core memory">Memòria de tors</a></b></i></div></div> </div> <div role="navigation" class="navbox" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Control_d%27autoritats" title="Control d'autoritats">Registres d'autoritat</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Gemeinsame_Normdatei" title="Gemeinsame Normdatei">GND</a> <span class="uid"> (<a rel="nofollow" class="external text" href="http://d-nb.info/gnd/4163631-4">1</a>)</span></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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