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<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="Toglo'r tabl cynnwys" > <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">Toglo'r tabl cynnwys</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">Cyfrifiadur prif ffrâm</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="Ewch i erthygl mewn iaith arall. Ar gael mewn 57 iaith" > <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-57" 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">57 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Mainframe" title="Mainframe - Aragoneg" lang="an" hreflang="an" data-title="Mainframe" data-language-autonym="Aragonés" data-language-local-name="Aragoneg" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AD%D8%A7%D8%B3%D9%88%D8%A8_%D9%85%D8%B1%D9%83%D8%B2%D9%8A" title="حاسوب مركزي - Arabeg" lang="ar" hreflang="ar" data-title="حاسوب مركزي" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Meynfreym" title="Meynfreym - Aserbaijaneg" lang="az" hreflang="az" data-title="Meynfreym" data-language-autonym="Azərbaycanca" data-language-local-name="Aserbaijaneg" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9C%D0%B5%D0%B9%D0%BD%D1%84%D1%80%D0%B5%D0%B9%D0%BC_%D0%BA%D0%BE%D0%BC%D0%BF%D1%8E%D1%82%D1%8A%D1%80" title="Мейнфрейм компютър - Bwlgareg" lang="bg" hreflang="bg" data-title="Мейнфрейм компютър" data-language-autonym="Български" data-language-local-name="Bwlgareg" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A7%87%E0%A6%87%E0%A6%A8%E0%A6%AB%E0%A7%8D%E0%A6%B0%E0%A7%87%E0%A6%AE_%E0%A6%95%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A6%BF%E0%A6%89%E0%A6%9F%E0%A6%BE%E0%A6%B0" title="মেইনফ্রেম কম্পিউটার - Bengaleg" lang="bn" hreflang="bn" data-title="মেইনফ্রেম কম্পিউটার" data-language-autonym="বাংলা" data-language-local-name="Bengaleg" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ordinador_central" title="Ordinador central - Catalaneg" lang="ca" hreflang="ca" data-title="Ordinador central" data-language-autonym="Català" data-language-local-name="Catalaneg" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Mainframe" title="Mainframe - Tsieceg" lang="cs" hreflang="cs" data-title="Mainframe" data-language-autonym="Čeština" data-language-local-name="Tsieceg" 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/Mainframe" title="Mainframe - Daneg" lang="da" hreflang="da" data-title="Mainframe" data-language-autonym="Dansk" data-language-local-name="Daneg" 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/Gro%C3%9Frechner" title="Großrechner - Almaeneg" lang="de" hreflang="de" data-title="Großrechner" data-language-autonym="Deutsch" data-language-local-name="Almaeneg" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9A%CE%B5%CE%BD%CF%84%CF%81%CE%B9%CE%BA%CF%8C%CF%82_%CF%85%CF%80%CE%BF%CE%BB%CE%BF%CE%B3%CE%B9%CF%83%CF%84%CE%AE%CF%82" title="Κεντρικός υπολογιστής - Groeg" lang="el" hreflang="el" data-title="Κεντρικός υπολογιστής" data-language-autonym="Ελληνικά" data-language-local-name="Groeg" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Mainframe_computer" title="Mainframe computer - Saesneg" lang="en" hreflang="en" data-title="Mainframe computer" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/%C4%88efkomputilo" title="Ĉefkomputilo - Esperanto" lang="eo" hreflang="eo" data-title="Ĉefkomputilo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Unidad_central" title="Unidad central - Sbaeneg" lang="es" hreflang="es" data-title="Unidad central" data-language-autonym="Español" data-language-local-name="Sbaeneg" 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/Suurarvuti" title="Suurarvuti - Estoneg" lang="et" hreflang="et" data-title="Suurarvuti" data-language-autonym="Eesti" data-language-local-name="Estoneg" 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/Konputagailu_nagusi" title="Konputagailu nagusi - Basgeg" lang="eu" hreflang="eu" data-title="Konputagailu nagusi" data-language-autonym="Euskara" data-language-local-name="Basgeg" 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%A8%D8%B2%D8%B1%DA%AF%E2%80%8C%D8%B1%D8%A7%DB%8C%D8%A7%D9%86%D9%87" title="بزرگ‌رایانه - Perseg" lang="fa" hreflang="fa" data-title="بزرگ‌رایانه" data-language-autonym="فارسی" data-language-local-name="Perseg" 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/Suurtietokone" title="Suurtietokone - Ffinneg" lang="fi" hreflang="fi" data-title="Suurtietokone" data-language-autonym="Suomi" data-language-local-name="Ffinneg" 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/Ordinateur_central" title="Ordinateur central - Ffrangeg" lang="fr" hreflang="fr" data-title="Ordinateur central" data-language-autonym="Français" data-language-local-name="Ffrangeg" 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%9E%D7%97%D7%A9%D7%91_%D7%9E%D7%A8%D7%9B%D7%96%D7%99" title="מחשב מרכזי - Hebraeg" lang="he" hreflang="he" data-title="מחשב מרכזי" data-language-autonym="עברית" data-language-local-name="Hebraeg" 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%AE%E0%A5%87%E0%A4%A8%E0%A4%AB%E0%A4%BC%E0%A5%8D%E0%A4%B0%E0%A5%87%E0%A4%AE_%E0%A4%95%E0%A4%82%E0%A4%AA%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%9F%E0%A4%B0" title="मेनफ़्रेम कंप्यूटर - Hindi" lang="hi" hreflang="hi" data-title="मेनफ़्रेम कंप्यूटर" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Sredi%C5%A1nje_ra%C4%8Dunalo" title="Središnje računalo - Croateg" lang="hr" hreflang="hr" data-title="Središnje računalo" data-language-autonym="Hrvatski" data-language-local-name="Croateg" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Nagysz%C3%A1m%C3%ADt%C3%B3g%C3%A9p" title="Nagyszámítógép - Hwngareg" lang="hu" hreflang="hu" data-title="Nagyszámítógép" data-language-autonym="Magyar" data-language-local-name="Hwngareg" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Komputer_bingkai_utama" title="Komputer bingkai utama - Indoneseg" lang="id" hreflang="id" data-title="Komputer bingkai utama" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indoneseg" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Mainframe" title="Mainframe - Eidaleg" lang="it" hreflang="it" data-title="Mainframe" data-language-autonym="Italiano" data-language-local-name="Eidaleg" 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/%E3%83%A1%E3%82%A4%E3%83%B3%E3%83%95%E3%83%AC%E3%83%BC%E3%83%A0" title="メインフレーム - Japaneeg" lang="ja" hreflang="ja" data-title="メインフレーム" data-language-autonym="日本語" data-language-local-name="Japaneeg" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9C%D1%8D%D0%B9%D0%BD%D1%84%D1%80%D0%B5%D0%B9%D0%BC" title="Мэйнфрейм - Casacheg" lang="kk" hreflang="kk" data-title="Мэйнфрейм" data-language-autonym="Қазақша" data-language-local-name="Casacheg" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%80%E1%9E%BB%E1%9F%86%E1%9E%96%E1%9F%92%E1%9E%99%E1%9E%BC%E1%9E%91%E1%9F%90%E1%9E%9A_mainframe" title="កុំព្យូទ័រ mainframe - Chmereg" lang="km" hreflang="km" data-title="កុំព្យូទ័រ mainframe" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="Chmereg" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%A9%94%EC%9D%B8%ED%94%84%EB%A0%88%EC%9E%84" title="메인프레임 - Coreeg" lang="ko" hreflang="ko" data-title="메인프레임" data-language-autonym="한국어" data-language-local-name="Coreeg" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9C%D0%B5%D0%B9%D0%BD%D1%84%D1%80%D0%B5%D0%B9%D0%BC" title="Мейнфрейм - Cirgiseg" lang="ky" hreflang="ky" data-title="Мейнфрейм" data-language-autonym="Кыргызча" data-language-local-name="Cirgiseg" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BB%80%E0%BA%A1%E0%BA%99%E0%BB%80%E0%BA%9F%E0%BA%A3%E0%BA%A1" title="ເມນເຟຣມ - Laoeg" lang="lo" hreflang="lo" data-title="ເມນເຟຣມ" data-language-autonym="ລາວ" data-language-local-name="Laoeg" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Centrinis_kompiuteris" title="Centrinis kompiuteris - Lithwaneg" lang="lt" hreflang="lt" data-title="Centrinis kompiuteris" data-language-autonym="Lietuvių" data-language-local-name="Lithwaneg" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Lieldators" title="Lieldators - Latfieg" lang="lv" hreflang="lv" data-title="Lieldators" data-language-autonym="Latviešu" data-language-local-name="Latfieg" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D0%B5%D1%98%D0%BD%D1%84%D1%80%D0%B5%D1%98%D0%BC_%D1%81%D0%BC%D0%B5%D1%82%D0%B0%D1%87" title="Мејнфрејм сметач - Macedoneg" lang="mk" hreflang="mk" data-title="Мејнфрејм сметач" data-language-autonym="Македонски" data-language-local-name="Macedoneg" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AE%E0%B5%86%E0%B4%AF%E0%B4%BF%E0%B5%BB%E0%B4%AB%E0%B5%8D%E0%B4%B0%E0%B5%86%E0%B4%AF%E0%B4%BF%E0%B4%82_%E0%B4%95%E0%B4%AE%E0%B5%8D%E0%B4%AA%E0%B5%8D%E0%B4%AF%E0%B5%82%E0%B4%9F%E0%B5%8D%E0%B4%9F%E0%B5%BC" title="മെയിൻഫ്രെയിം കമ്പ്യൂട്ടർ - Malayalam" lang="ml" hreflang="ml" data-title="മെയിൻഫ്രെയിം കമ്പ്യൂട്ടർ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%9C%D1%8D%D0%B9%D0%BD%D1%84%D1%80%D1%8D%D0%B9%D0%BC" title="Мэйнфрэйм - Mongoleg" lang="mn" hreflang="mn" data-title="Мэйнфрэйм" data-language-autonym="Монгол" data-language-local-name="Mongoleg" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Komputer_kerangka_utama" title="Komputer kerangka utama - Maleieg" lang="ms" hreflang="ms" data-title="Komputer kerangka utama" data-language-autonym="Bahasa Melayu" data-language-local-name="Maleieg" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%99%E1%80%AD%E1%80%94%E1%80%BA%E1%80%B8%E1%80%96%E1%80%9B%E1%80%AD%E1%80%94%E1%80%BA_%E1%80%80%E1%80%BD%E1%80%94%E1%80%BA%E1%80%95%E1%80%BB%E1%80%B0%E1%80%90%E1%80%AC" title="မိန်းဖရိန် ကွန်ပျူတာ - Byrmaneg" lang="my" hreflang="my" data-title="မိန်းဖရိန် ကွန်ပျူတာ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Byrmaneg" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Mainframe" title="Mainframe - Iseldireg" lang="nl" hreflang="nl" data-title="Mainframe" data-language-autonym="Nederlands" data-language-local-name="Iseldireg" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Stormaskin" title="Stormaskin - Norwyeg Bokmål" lang="nb" hreflang="nb" data-title="Stormaskin" data-language-autonym="Norsk bokmål" data-language-local-name="Norwyeg 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/Mainframe" title="Mainframe - Pwyleg" lang="pl" hreflang="pl" data-title="Mainframe" data-language-autonym="Polski" data-language-local-name="Pwyleg" 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/Mainframe" title="Mainframe - Portiwgaleg" lang="pt" hreflang="pt" data-title="Mainframe" data-language-autonym="Português" data-language-local-name="Portiwgaleg" 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/Mainframe" title="Mainframe - Rwmaneg" lang="ro" hreflang="ro" data-title="Mainframe" data-language-autonym="Română" data-language-local-name="Rwmaneg" 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%9C%D0%B5%D0%B9%D0%BD%D1%84%D1%80%D0%B5%D0%B9%D0%BC" title="Мейнфрейм - Rwseg" lang="ru" hreflang="ru" data-title="Мейнфрейм" data-language-autonym="Русский" data-language-local-name="Rwseg" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Mejnfrejm_ra%C4%8Dunar" title="Mejnfrejm računar - Serbo-Croateg" lang="sh" hreflang="sh" data-title="Mejnfrejm računar" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croateg" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Mainframe_computer" title="Mainframe computer - Simple English" lang="en-simple" hreflang="en-simple" data-title="Mainframe computer" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Mainframe" title="Mainframe - Slofaceg" lang="sk" hreflang="sk" data-title="Mainframe" data-language-autonym="Slovenčina" data-language-local-name="Slofaceg" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Osrednji_ra%C4%8Dunalnik" title="Osrednji računalnik - 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href="https://commons.wikimedia.org/wiki/Category:Mainframe_computers" hreflang="en"><span>Comin Wikimedia</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q177234" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g"><span>Eitem Wicidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header 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id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:IBM_z13_and_LinuxONE_Rockhopper.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/IBM_z13_and_LinuxONE_Rockhopper.jpg/220px-IBM_z13_and_LinuxONE_Rockhopper.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/IBM_z13_and_LinuxONE_Rockhopper.jpg/330px-IBM_z13_and_LinuxONE_Rockhopper.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/45/IBM_z13_and_LinuxONE_Rockhopper.jpg/440px-IBM_z13_and_LinuxONE_Rockhopper.jpg 2x" data-file-width="5184" data-file-height="3456" /></a><figcaption>Dau gyfrifiadur prif ffrâm IBM. Ch: IBM z Systems z13. Dde: IBM LinuxONE Rockhopper.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:IBM_System_Z9_(type_2094_inside).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/IBM_System_Z9_%28type_2094_inside%29.jpg/220px-IBM_System_Z9_%28type_2094_inside%29.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/61/IBM_System_Z9_%28type_2094_inside%29.jpg/330px-IBM_System_Z9_%28type_2094_inside%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/61/IBM_System_Z9_%28type_2094_inside%29.jpg/440px-IBM_System_Z9_%28type_2094_inside%29.jpg 2x" data-file-width="2134" data-file-height="2667" /></a><figcaption>Y tu fewn i'r IBM System z9</figcaption></figure> <p>Mae cyfrifiaduron <b>prif ffrâm</b> (y cyfeirir atynt ar lafar fel <i>"big iron"</i>) yn gyfrifiaduron a ddefnyddir yn bennaf gan sefydliadau a chwmniau mawr ar gyfer gwaith <a href="/wiki/Uned_brosesu_ganolog" title="Uned brosesu ganolog">prosesu</a> <a href="/wiki/Data" title="Data">data</a> a gwybodaeth hanfodol. Gallant drin a thrafod <a href="/wiki/Data_mawr" title="Data mawr">data mawr</a> yn gynt na <a href="/wiki/Cyfrifiadur_personol" title="Cyfrifiadur personol">chyfrifiadur personol</a> neu hyd yn oed <a href="/wiki/Gweinydd_(cyfrifiadur)" title="Gweinydd (cyfrifiadur)">weinyddwyr</a>, oherwydd eu pŵer prosesu, sef y <a href="/wiki/Uned_brosesu_ganolog" title="Uned brosesu ganolog">UBGs</a>.<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> Anaml y gwelir un ar ei ben ei hun; fel arfer ceir rhesi ohonynt yn cydweithio gyda'i gilydd. </p><p>Cyfeiriodd y term yn wreiddiol at y cypyrddau mawr "prif fframiau" lle cedwid yr <a href="/wiki/Uned_brosesu_ganolog" title="Uned brosesu ganolog">uned brosesu ganolog</a> a'r <a href="/w/index.php?title=Cof_cyfrifiadurol&action=edit&redlink=1" class="new" title="Cof cyfrifiadurol (dim tudalen ar gael)">prif gof</a>.<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><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><p>Yn ddiweddarach, defnyddiwyd y term i wahaniaethu rhwng peiriannau masnachol, cryf, ag unedau llai pwerus.<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> Sefydlwyd y rhan fwyaf systemau fframiau mawr yn y <a href="/wiki/1960au" title="1960au">1960au</a>, ond maent yn parhau i esblygu hyd heddiw (2019). Defnyddir cyfrifiaduron prif ffrâm yn aml fel <a href="/wiki/Gweinydd_(cyfrifiadur)" title="Gweinydd (cyfrifiadur)">gweinydd</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Datblygiadau">Datblygiadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&veaction=edit&section=1" title="Golygu'r adran: Datblygiadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&action=edit&section=1" title="Edit section's source code: Datblygiadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Er mai prif nodwedd y Cyfrifiadur prif ffrâm yw cyflymder, ceir ystyriaethau eraill a ystyrir gan lawer i fod yr un mor bwysig: </p> <ol><li>dibynadwyedd a diogelwch</li> <li>ôl-gydnaws: a yw hen feddalwedd yn dal i weithio?</li> <li>nodweddion mewnbynnu/allbynnu ("I/O")</li> <li>y gallu i gyfnewid <a href="/wiki/Caledwedd" title="Caledwedd">caledwedd</a> megis y prosesydd a chof, yn sydyn.</li></ol> <p>Mae cyfrifiaduron prif ffrâm wedi eu llunio i redeg am gyfnodau hir (degawdau), yn ddi-dor, a hynny mewn modd dibynadwy a diogel. Gelwir y nodwedd hon yn aml yn RAS: <i>reliability, availability</i> a <i>serviceability</i>. Mae'r Sefydliad Cenedlaethol Safonau a Thechnoleg (NIST) yn clustnodi cyfrifiaduron sy'n pasio'r meincnodau hyn, ac yn eu plith enwir yr IBM Z (a elwid gynt yn z Systems, System z a zSeries), Unisys Dorado ac Unisys Libra fel y rhai mwyaf diogel. Mae eu diffygion yn y digidau sengl isel, o'u cymharu â miloedd ar gyfer Windows, UNIX, a Linux. </p><p>Mae uwchraddio meddalwedd fel arfer yn gofyn am sefydlu'r <a href="/wiki/System_weithredu" title="System weithredu">system weithredu</a> neu ddarnau ohoni, drwy rannu'r gwaaith rhwng y systemau eraill. </p> <div class="mw-heading mw-heading2"><h2 id="Hanes">Hanes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&veaction=edit&section=2" title="Golygu'r adran: Hanes" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&action=edit&section=2" title="Edit section's source code: Hanes"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Yn y <a href="/wiki/1950au" title="1950au">1950au</a>, rhyngwyneb syml iawn oedd gan y cyfrifiadur prif ffrâm (y consol), a defnyddid cardiau tyllog neu dap papur neu fagnetig i lwytho data a rhaglenni. Eu gwaith yr adeg honno oedd cefnogi gwaith clerigol fel <a href="/wiki/Cyflog" title="Cyflog">cyflogau</a>, <a href="/w/index.php?title=Anfoneb&action=edit&redlink=1" class="new" title="Anfoneb (dim tudalen ar gael)">anfonebau</a>, a thaliadau drwy wahanu, dosbarthu a chyfuno data - gwaith ailadroddus a llafurus, fel arfer, ar lawr y swyddfa. Yna daeth argraffu-llinell, parhaus. Pan ddaeth <a href="/w/index.php?title=Terfynell&action=edit&redlink=1" class="new" title="Terfynell (dim tudalen ar gael)">terfynellau</a> ("tethi" oedd y gair Cymraeg gwreiddiol), yna galluogwyd y cwsmer i gysylltu'n uniongyrchol gyda'r cyfrifiadur prif ffrâm - yn bennaf i fwcio teithiau awyr ayb. drwy'r <a href="/wiki/1970au" title="1970au">1970au</a>, cysylltwyd y <a href="/wiki/Teipiadur" title="Teipiadur">teipiadur</a> gyda'r cyfrifiadur, fel consol, hyd nes y dyfeisiwyd yr <a href="/wiki/Allweddell" title="Allweddell">allweddell</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Nodweddion">Nodweddion</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&veaction=edit&section=3" title="Golygu'r adran: Nodweddion" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&action=edit&section=3" title="Edit section's source code: Nodweddion"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Gall y cyfrifiadur prif ffrâm redeg sawl <a href="/wiki/System_weithredu" title="System weithredu">system weithredu</a> ar yr un pryd. Gelwir y dechneg hon yn "beiriannau rhithwir", a chant eu rhedeg fel pe taent yn gyfrifiaduron annibynnol, real.<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> </p><p>Nodwedd arall yw <a href="/w/index.php?title=Ffeirio_tinboeth&action=edit&redlink=1" class="new" title="Ffeirio tinboeth (dim tudalen ar gael)">ffeirio tinboeth</a> (<i>hot swapping</i>) heb amharu ar y system reoli. </p> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&veaction=edit&section=4" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cyfrifiadur_prif_ffr%C3%A2m&action=edit&section=4" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.theregister.co.uk/2005/07/20/ibm_mainframe_refresh/">"IBM preps big iron fiesta"</a>. The Register. 20 Gorffennaf 2005.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=IBM+preps+big+iron+fiesta&rft.pub=The+Register&rft.date=2005-07-20&rft_id=https%3A%2F%2Fwww.theregister.co.uk%2F2005%2F07%2F20%2Fibm_mainframe_refresh%2F&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACyfrifiadur+prif+ffr%C3%A2m" class="Z3988"></span><style data-mw-deduplicate="TemplateStyles:r8312344">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}</style></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><cite class="citation encyclopaedia">"mainframe, n". <i><a href="/wiki/Oxford_English_Dictionary" title="Oxford English Dictionary">Oxford English Dictionary</a></i> (arg. on-line).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=mainframe%2C+n&rft.btitle=Oxford+English+Dictionary&rft.edition=on-line&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACyfrifiadur+prif+ffr%C3%A2m" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><cite id="CITEREFEbbersO’BrienOgden2006" class="citation web">Ebbers, Mike; O’Brien, W.; Ogden, B. (2006). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170702062639/http://publibz.boulder.ibm.com/zoslib/pdf/zosbasic.pdf">"Introduction to the New Mainframe: z/OS Basics"</a> <span class="cs1-format">(PDF)</span>. IBM International Technical Support Organization. Archifwyd o'r <a rel="nofollow" class="external text" href="http://publibz.boulder.ibm.com/zoslib/pdf/zosbasic.pdf">gwreiddiol</a> <span class="cs1-format">(PDF)</span> ar 2017-07-02<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2007-06-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Introduction+to+the+New+Mainframe%3A+z%2FOS+Basics&rft.pub=IBM+International+Technical+Support+Organization&rft.date=2006&rft.aulast=Ebbers&rft.aufirst=Mike&rft.au=O%E2%80%99Brien%2C+W.&rft.au=Ogden%2C+B.&rft_id=http%3A%2F%2Fpublibz.boulder.ibm.com%2Fzoslib%2Fpdf%2Fzosbasic.pdf&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACyfrifiadur+prif+ffr%C3%A2m" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><cite id="CITEREFBeach" class="citation web">Beach, Thomas E. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150730182332/http://www.unm.edu/~tbeach/terms/types.html">"Computer Concepts and Terminology: Types of Computers"</a>. Archifwyd o'r <a rel="nofollow" class="external text" href="http://www.unm.edu/~tbeach/terms/types.html">gwreiddiol</a> ar 30 Gorffennaf 2015<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">November 17,</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Computer+Concepts+and+Terminology%3A+Types+of+Computers&rft.aulast=Beach&rft.aufirst=Thomas+E.&rft_id=http%3A%2F%2Fwww.unm.edu%2F~tbeach%2Fterms%2Ftypes.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACyfrifiadur+prif+ffr%C3%A2m" class="Z3988"></span> <span class="cs1-visible-error error citation-comment">Unknown parameter <code class="cs1-code">|deadurl=</code> ignored (<a href="/wiki/Cymorth:CS1_errors#parameter_ignored" title="Cymorth:CS1 errors">help</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20181118145944/https://www.computerworld.com/article/2551154/virtualization/emulation-or-virtualization-.html">"Emulation or Virtualization?"</a>. Archifwyd o'r <a rel="nofollow" class="external text" href="http://www.computerworld.com/article/2551154/virtualization/emulation-or-virtualization-.html">gwreiddiol</a> ar 2018-11-18<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2019-03-12</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Emulation+or+Virtualization%3F&rft_id=http%3A%2F%2Fwww.computerworld.com%2Farticle%2F2551154%2Fvirtualization%2Femulation-or-virtualization-.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3ACyfrifiadur+prif+ffr%C3%A2m" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> </ol></div></div>    </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="">Wedi dod o "<a dir="ltr" href="https://cy.wikipedia.org/w/index.php?title=Cyfrifiadur_prif_ffrâm&oldid=12562539">https://cy.wikipedia.org/w/index.php?title=Cyfrifiadur_prif_ffrâm&oldid=12562539</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Arbennig:Categories" title="Arbennig:Categories">Categorïau</a>: <ul><li><a href="/wiki/Categori:Mathau_o_gyfrifiaduron" title="Categori:Mathau o gyfrifiaduron">Mathau o gyfrifiaduron</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categori cudd: <ul><li><a href="/wiki/Categori:Pages_with_citations_using_unsupported_parameters" title="Categori:Pages with citations using unsupported parameters">Pages with citations using unsupported parameters</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"> Golygwyd y dudalen hon ddiwethaf ar 1 Mai 2024, am 00:18.</li> <li id="footer-info-copyright">Mae'r testun ar gael o dan <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-ShareAlike License</a>; gall telerau ychwanegol fod yn berthnasol. 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