Share to: share facebook share twitter share wa share telegram print page

Old World ROM

Showing all three icons of the OldWorld ROM (from left to right: Missing OS, Happy Mac (Found OS), and Sad Mac (Macintosh 128k/Plus) logos)

Old World ROM computers are the Macintosh (Mac) models that use a Macintosh Toolbox read-only memory (ROM) chip, usually in a socket (but soldered to the motherboard in some models). All Macs prior to the iMac, the iBook, the Blue and White Power Mac G3 and the Bronze Keyboard (Lombard) PowerBook G3 use Old World ROM, while said models, as well as all subsequent models until the introduction of the Intel-based EFI Models, are New World ROM machines. In particular, the Beige Power Mac G3 and all other beige and platinum-colored Power Macs are Old World ROM machines. In common use, the "Old World" designation usually applies to the early generations of PCI-based "beige" Power Macs (and sometimes the first NuBus-equipped models), but not the older Motorola 68000-based Macs; however, the Toolbox runs the same way on all three types of machines.

Details

PCI Power Macs with an Old World ROM contain an Open Firmware implementation, and a copy of the Macintosh Toolbox as an Open Firmware device. These machines are set to boot from this device by default, thus starting the normal Macintosh startup procedure. This can be changed, just as on New World ROM Macs, but with limitations placed on what devices and formats can be used; on these machines, particularly the early machines like the Power Macintosh 9500, the Open Firmware implementation was just enough to enumerate PCI devices and load the Toolbox ROM, and these Open Firmware revisions have several bugs which must be worked around by boot loaders or nvramrc patches. The Open Firmware environment can be entered by holding the key combination ⌘ Cmd+⌥ Option+O+F while booting.

All Power Macs emulate a 68LC040 CPU inside a nanokernel; this emulator is then used to boot the predominantly 68k-based Toolbox, and is also used to support applications written for the 68k processor. Once Toolbox is running, PPC machines can boot into Mac OS directly.

On all Old World ROM machines, once Toolbox is loaded, the boot procedure is the same. Toolbox executes a memory test, enumerates Mac OS devices it knows about (this varies from model to model), and either starts the on-board video (if present) or the option ROM on a NuBus or PCI video card. Toolbox then checks for a disk in the floppy drive, and scans all SCSI buses for a disk with a valid System Folder, giving preference to whatever disk is set as the startup disk in the parameter RAM.

If a bootable disk is found, the Happy Mac logo is displayed, and control is handed over to the Mac OS. If no disk to boot from is present, an icon depicting a floppy disk with a blinking question mark in the middle will be displayed. If a hardware problem occurs during the early part of the boot process, the machine will display the Sad Mac icon with a hexadecimal error code and freeze; on Macs made after 1987, this will be accompanied by the Chimes of Death sound.

Since the Old World ROM usually boots to Toolbox, most OSs have to be installed using a boot loader from inside Mac OS (BootX is commonly used for Linux installations). 68K-based Macs and NuBus Power Macs must have Mac OS installed to load another OS (even A/UX, which was an Apple product), usually with virtual memory turned off. PCI Power Macs can be configured to boot into Open Firmware, allowing the firmware to load a boot loader directly, or they can use a specially-prepared floppy disk to trick the Toolbox into loading a kernel (this is used for Linux installation floppy images).

The simplest way to identify an Old World ROM Mac is that it will not have a factory built-in USB port. Only New World ROM Macs featured a USB port as factory equipment.

See also

External links

Read other articles:

沈阳广播电视台Shenyang Radio&Television公司類型国有事业单位成立2010年12月1日總部 中国辽宁省沈阳市产业媒体產品电视节目,广播节目网站http://www.csytv.com 沈阳市广播电视台是中国辽宁省沈阳市的副省级城市广播电视机构,为沈阳市人民政府直属事业单位,不定机构规格,实行企业化管理。[1] 历史沿革 沈阳市最早的广播电台是奉系于民国16(1927)年建立的奉天广播

Syarif Bastaman (lahir 2 Juni 1963) adalah seorang politikus Indonesia kelahiran Tasikmalaya, Jawa Barat. Ia menjabat sebagai Sekjen Banteng Muda Indonesia Partai Demokrasi Indonesia Perjuangan yang berhasil maju ke pemilihan anggota legislatif pada pemilihan umum legislatif Indonesia 2009. Ia maju dalam daerah pemilihan Jawa Barat XI yang meliputi wilayah meliputi Kabupaten Garut, Kabupaten Tasikmalaya, Kota Tasikmalaya dan berhasil mengumpulkan perolehan 84.979 suara. Ia menjabat sebagai Benda…

Cantones de Bajo Rin ¿?- 1 de enero de 2015 El departamento francés de Bajo Rin, se componía hasta el 1 de enero de 2015 de 44 cantones, que se repartían por distrito, como sigue: Distrito de Estrasburgo-Campiña[1]​ (8 cantones - prefectura: Estrasburgo):Bischheim - Brumath - Geispolsheim - Hochfelden - Illkirch-Graffenstaden - Mundolsheim - Schiltigheim y Truchtersheim Distrito de Estrasburgo-Villa[2]​ (10 cantones - prefectura: Estrasburgo):Estrasburgo-1 - Estrasburgo-2 - Estr…

 Nota: Para a filha de Luís Filipe I de França, duquesa de Württemberg, veja Maria de Orleães (1813–1839). Maria Amélia Princesa da FrançaPrincesa da Dinamarca Maria Amélia de Orléans Nascimento 13 de janeiro de 1865   Ham, Londres, Inglaterra Morte 4 de dezembro de 1909 (44 anos)   Copenhaga, Dinamarca Sepultado em Catedral de Roskilde, Roskilde, Dinamarca Nome completo Maria Amélia Francisca Helena Marido Valdemar da Dinamarca Descendência Aage da Dinamarca…

Major chord in music theory In Classical music theory, a Neapolitan chord (or simply a Neapolitan) is a major chord built on the lowered (flatted) second (supertonic) scale degree. In Schenkerian analysis, it is known as a Phrygian II,[1] since in minor scales the chord is built on the notes of the corresponding Phrygian mode. Although it is sometimes indicated by an N rather than a ♭II,[2] some analysts prefer the latter because it indicates the relation of this chord to …

Ariana Grande videographyGrande performing on her Dangerous Woman Tour in 2017Film7Television series23Web series2Music videos56Theatre2Otherssee American singer, songwriter, and actress Ariana Grande has appeared in 56 music videos, including eight featured appearances and six uncredited appearances. She has also appeared in 23 television shows and seven films. Music videos Nicki Minaj has collaborated on the music videos for Bang Bang, Side to Side, The Light is Coming and Bed Victoria Monét f…

Museo de anclas Philippe Cousteau UbicaciónPaís España EspañaComunidad Principado de Asturias Principado de AsturiasMunicipio CastrillónCoordenadas 43°34′47″N 5°58′08″O / 43.579831, -5.968753Historia y gestiónInauguración 30 de septiembre de 1993Mapa de localización Museo de anclas Philippe Cousteau Ubicación en Asturias [editar datos en Wikidata] El museo de anclas Philippe Cousteau es un museo al aire libre español situado en Salinas, en …

Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada Januari 2023. Artikel ini berisi konten yang ditulis dengan gaya sebuah iklan. Bantulah memperbaiki artikel ini dengan menghapus konten yang dianggap sebagai spam dan pranala luar yang tidak sesuai, dan tambahkan konten ensiklopedis yang ditulis dari sudut pandang netr…

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (يناير 2020) كاتدرائية القديسة مريم تعديل مصدري - تعديل     لمعانٍ أخرى، طالع كاتدرائية القديسة مريم (توضيح). كاتدرائية القديسة مريم (بالفارسيَّة: کلیسای جامع سنت مر…

BaracksdubsYouTube informationCreated byFadi SalehYears active2012–2019GenreComedySubscribers1.49 million (11 November 2023)Total views309.3 millionNetworkSpare Time EntertainmentLast updated: 13 November 2023 Baracksdubs is a popular YouTube channel and series that uses Barack Obama speeches to create cover songs, generally of popular songs. The channel was created by Fadi Saleh as a then-freshman student of the University of Tennessee.[1][2] The channel was a M…

North American collegiate fraternity This article is about the social fraternity. For the Illinois College local literary society, see Sigma Phi Epsilon Literary Society. Sigma Phi EpsilonΣΦΕFoundedNovember 1, 1901; 122 years ago (1901-11-01)Richmond College (Richmond, Virginia, U.S.)TypeSocialAffiliationNIC (former)ScopeNationalMission statementBuilding Balanced MenColors  Red  Purple  GoldFlagFlowerViolet and Dark Red RosePhilanthropyBig Brothers Big Sisters…

العلاقات السويدية اليونانية السويد اليونان   السويد   اليونان تعديل مصدري - تعديل   العلاقات السويدية اليونانية هي العلاقات الثنائية التي تجمع بين السويد واليونان.[1][2][3][4][5] مقارنة بين البلدين هذه مقارنة عامة ومرجعية للدولتين: وجه المقارنة …

1960 film directed by C. Pullaiah Naan Kanda SorgamPosterDirected byC. PullayyaBased onJamalaye Jibanta Manush (1958)Produced byC. PullayyaStarringK. A. ThangaveluSowcar JanakiCinematographyNanjappaP. S. LoganathanMusic byG. AswathamaProductioncompanyBharghavi FilmsRelease date 12 August 1960 (1960-08-12) CountryIndiaLanguageTamil Naan Kanda Sorgam (transl. My Heaven) is a 1960 Indian Tamil-language fantasy comedy film directed and produced by C. Pullayya. The film stars K. …

Secondary school in Isle of Lewis, ScotlandNicolson InstituteÀrd-sgoil MhicNeacailAddressSpringfield Road, StornowayIsle of Lewis, HS1 2PZScotlandCoordinates58°12′40″N 6°22′44″W / 58.211°N 6.379°W / 58.211; -6.379InformationTypeSecondaryEstablished1873; 150 years ago (1873)FounderAlexander Morrison NicolsonRectorJennifer CairnsEnrolment1,200Websitewww.nicolsoninstitute.org The Nicolson Institute (Gaelic: Àrd-sgoil MhicNeacail) in Stornoway,…

artikel ini perlu dirapikan agar memenuhi standar Wikipedia. Tidak ada alasan yang diberikan. Silakan kembangkan artikel ini semampu Anda. Merapikan artikel dapat dilakukan dengan wikifikasi atau membagi artikel ke paragraf-paragraf. Jika sudah dirapikan, silakan hapus templat ini. (Pelajari cara dan kapan saatnya untuk menghapus pesan templat ini) Artikel ini perlu dikembangkan agar dapat memenuhi kriteria sebagai entri Wikipedia.Bantulah untuk mengembangkan artikel ini. Jika tidak dikembangkan…

1964年の西鉄ライオンズ成績 パシフィック・リーグ5位 63勝81敗6分 勝率.438[1]本拠地都市 福岡県福岡市球場 平和台野球場 球団組織経営母体 西日本鉄道監督 中西太(選手兼任)« 19631965 » テンプレートを表示 1964年の西鉄ライオンズでは、1964年の西鉄ライオンズの動向をまとめる。 この年の西鉄ライオンズは、中西太選手兼任監督の3年目のシーズンである。 …

Por favor, melhore este artigo, expandindo-o. Mais informações podem ser encontradas no artigo «Northrop YB-49» na Wikipédia em inglês e também na página de discussão. (Julho de 2015) YB-49 Northrop YB-49Um Northrop YB-49 sobrevoando o deserto nos EUA Descrição Tipo / Missão Bombardeiro estratégico País de origem  Estados Unidos Fabricante Northrop Corporation Período de produção Somente protótipo Quantidade produzida 27 Desenvolvido de Northrop YB-35 Desenvolvido em B-2 S…

Rapid transit station in the UAE This article is about the metro station. For the free-trade zone, see Dubai Multi Commodities Centre. DMCCمركز دبي للسلع المتعددةMetro StationDMCC metro station at nightGeneral informationLocationAl Thanyah Fifth, DubaiUnited Arab EmiratesCoordinates25°04′15″N 55°08′19″E / 25.0709°N 55.1387°E / 25.0709; 55.1387Line(s)  Red LinePlatforms2 side platformsTracks2Connections RTA Dubai  JLT2  D…

2017 American psychological thriller streaming television series For other uses, see Gypsy (disambiguation). GypsyPromotional posterGenre Drama Psychological thriller Created byLisa RubinStarring Naomi Watts Billy Crudup Sophie Cookson Lucy Boynton Karl Glusman Melanie Liburd Poorna Jagannathan Brenda Vaccaro Brooke Bloom Opening themeGypsy by Stevie NicksCountry of originUnited StatesOriginal languageEnglishNo. of seasons1No. of episodes10ProductionExecutive producers Lisa Rubin Liza Chasin Tim…

Dutch artist The main Danube Principalities: Bulgaria, Greece, Anatolia and Italy, map now at the Romanian National Museum of Maps and Old Books. Justus Danckerts I (11 November 1635 in Amsterdam – 16 July 1701 in Amsterdam) was a Dutch engraver and print publisher who along with other members of the Danckerts family created one of the leading Dutch geographical map and atlas publishing houses. Biography Justus Danckerts was the son of Cornelis Danckerts I (1603–1656), who established the Da…

Kembali kehalaman sebelumnya

Lokasi Pengunjung: 3.235.182.206