The Coherent operating system was a Unix Version 7 clone by the now-defunct Mark Williams Company, originally produced for the PDP-11 in 1980. A port was introduced in 1983 as the first Unix-like system for IBM PC compatible computers. Coherent was able to run on most Intel-based PCs with Intel 8088, 286, 386, and 486 processors. Coherent version 3 for Intel-based PCs required at least a 286, Coherent version 4 for Intel-based PCs required at least a 386.

PropertyValue
dbpedia-owl:thumbnail
dbpprop:abstract
  • The Coherent operating system was a Unix Version 7 clone by the now-defunct Mark Williams Company, originally produced for the PDP-11 in 1980. A port was introduced in 1983 as the first Unix-like system for IBM PC compatible computers. Coherent was able to run on most Intel-based PCs with Intel 8088, 286, 386, and 486 processors. Coherent version 3 for Intel-based PCs required at least a 286, Coherent version 4 for Intel-based PCs required at least a 386. Like a true Unix, Coherent was able to multitask and support multiple users. From version 4 on Coherent also had support for X11 and MGR windowing systems. Later versions of Coherent (version 4 and higher) supported features common in modern Unix-like systems, including virtual memory with demand paging, a version of MicroEMACS, access to DOS FAT16 File systems, an optimizing C compiler with linker, and a modified version of Taylor UUCP. The final releases of Coherent also fully supported the iBCS COFF binary standard, which allowed binary compatibily with SCO Unix applications, including WordPerfect, Lotus 1-2-3, and several Microsoft applications including QuickBASIC, Microsoft Word, and MultiPlan. Coherent predates both MINIX and Linux by many years. A Zilog Z8000 port of Coherent was also used by the canceled Commodore 900 system. Coherent is sometimes mistakenly referred to as "Coherent Unix", which is incorrect. Coherent was based on the specifications of Unix Version 7, without reference to any of the Unix source code, either from Bell Labs or BSD. Much of the operating system was written by alumni from the University of Waterloo: Tom Duff, Dave Conroy, Randall Howard, Johann George, and Trevor John Thompson. Significant contributions were also made by people such as Nigel Bree (from Auckland, New Zealand). Nigel went on to write "Ghost" - later bought out and fully commercialized as Norton Ghost. The manual was entirely written by Fred Butzen and was praised because of its quality. The Mark Williams Company closed in 1995. Some websites offer Coherent for download, although the copyright status of it nowadays is unclear. While Coherent does not have the features of a modern Unix-like OS such as Linux, it is still a viable solution for those looking to run Unix on a very old computer such as a 286-based machine. Sources are available for version 4.2.14. However, they don't work. Sources for the latest available version are also available, but under NDA.
  • Coherent ist ein kommerzielles unixoides Betriebssystem der Firma Mark Williams Company und war eines der ersten unixoiden Systeme für IBM PC-kompatible Computer.
  • Coherent-käyttöjärjestelmä oli Unix (Version 7) klooni jota kehitti Mark Williams Company. Alun perin PDP-11 alustalle 1983 esitelty Coherent oli ensimmäinen Unix-tyyppinen käyttöjärjestelmä IBM PC yhteensopiville tietokoneille. Coherenttia voitiin ajaa Intel 8088, 286, 386 ja 486 prosessoreilla, ja kuten oikeat Unix järjestelmät Coherent tuki moniajoa ja useita käyttäjiä. Coherentissa oli tuki myös X11 ja MGR ikkunointijärjestelmille.
  • Le système d'exploitation Coherent a été créé en 1983 par la défunte Mark Williams Company comme l'un des premiers systèmes de type UNIX pour ordinateur IBM PC-compatible. Coherent était capable de tourner sur la plupart des PC à base Intel comme les Processeur 286, 386, et 486 et, comme un vrai Unix, était capable de multitâche et d'avoir de multiple utilisateurs. Coherent supportait aussi X11. Coherent est quelques fois assimilé malencontreusement à un « Coherent Unix », ce qui est incorrect. Coherent était basé sur les spécifications de Unix Version 7, sans référence aucune sur le code source Unix, contrairement à Bell Labs ou BSD. La majeure partie du système a été écrit par des ex-étudiants de l'Université de Waterloo : Tom Duff, Dave Conroy, Randall Howard, et Johann George. La Mark Williams Company fit banqueroute en 1995.
dbpprop:caption
  • Coherent 4.2.10 installer
dbpprop:developer
dbpprop:family
dbpprop:hasPhotoCollection
dbpprop:kernelType
dbpprop:language
dbpprop:latestReleaseDate
  • 1994 (xsd:integer)
dbpprop:latestReleaseVersion
  • 4.2.10
dbpprop:license
dbpprop:name
  • Coherent
dbpprop:progLanguage
dbpprop:reference
dbpprop:released
  • 1980 (xsd:integer)
dbpprop:screenshot
dbpprop:sourceModel
dbpprop:supportedPlatforms
dbpprop:wikiPageUsesTemplate
dbpprop:wordnet_type
dbpprop:workingState
  • Historic
rdfs:comment
  • The Coherent operating system was a Unix Version 7 clone by the now-defunct Mark Williams Company, originally produced for the PDP-11 in 1980. A port was introduced in 1983 as the first Unix-like system for IBM PC compatible computers. Coherent was able to run on most Intel-based PCs with Intel 8088, 286, 386, and 486 processors. Coherent version 3 for Intel-based PCs required at least a 286, Coherent version 4 for Intel-based PCs required at least a 386.
  • Coherent ist ein kommerzielles unixoides Betriebssystem der Firma Mark Williams Company und war eines der ersten unixoiden Systeme für IBM PC-kompatible Computer.
  • Coherent-käyttöjärjestelmä oli Unix (Version 7) klooni jota kehitti Mark Williams Company. Alun perin PDP-11 alustalle 1983 esitelty Coherent oli ensimmäinen Unix-tyyppinen käyttöjärjestelmä IBM PC yhteensopiville tietokoneille. Coherenttia voitiin ajaa Intel 8088, 286, 386 ja 486 prosessoreilla, ja kuten oikeat Unix järjestelmät Coherent tuki moniajoa ja useita käyttäjiä. Coherentissa oli tuki myös X11 ja MGR ikkunointijärjestelmille.
  • Le système d'exploitation Coherent a été créé en 1983 par la défunte Mark Williams Company comme l'un des premiers systèmes de type UNIX pour ordinateur IBM PC-compatible. Coherent était capable de tourner sur la plupart des PC à base Intel comme les Processeur 286, 386, et 486 et, comme un vrai Unix, était capable de multitâche et d'avoir de multiple utilisateurs. Coherent supportait aussi X11.
rdfs:label
  • Coherent (operating system)
  • Coherent
  • Coherent
  • Coherent
owl:sameAs
skos:subject
foaf:depiction
foaf:page