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- Pilot_(operating_system) abstract "Pilot was a single-user, multitasking operating system designed by Xerox PARC in early 1977. Pilot was written in the Mesa programming language, totalling about 24,000 lines of code.Pilot was designed as a single user system in a highly networked environment of other Pilot systems, with interfaces designed for inter-process communication (IPC) across the network via the Pilot stream interface. Pilot combined virtual memory and file storage into one subsystem, and used the manager/kernel architecture for managing the system and its resources. Its designers considered a non-preemptive multitasking model, but later chose a preemptive (run until blocked) system based on monitors. Pilot included a debugger, Co-Pilot, that could debug a frozen snapshot of the operating system, written to disk. A typical Pilot workstation ran 3 operating systems at once on 3 different disk volumes : Co-Co-Pilot (a backup debugger in case the main operating system crashed), Co-Pilot (the main operating system, running under Co-Co-Pilot and used to compile and bind programs) and an inferior copy of Pilot running in a 3rd disk volume, that could be booted to run test programs (that might crash the main development environment). The debugger was written to read and write variables for a program stored on a separate disk volume.This architecture was unique because it allowed the developer to single-step even operating system code with semaphore locks, stored on an inferior disk volume. However, as the memory and source code of the D-series Xerox processors grew, the time to checkpoint and restore the operating system (known as a "world swap") grew very high. It could take 60-120 seconds to run just one line of code in the inferior operating system environment. Eventually, a co-resident debugger was developed to take the place of Co-Pilot.Pilot was used as the operating system for the Xerox Star workstation.".
- Pilot_(operating_system) developer PARC_(company).
- Pilot_(operating_system) language English_language.
- Pilot_(operating_system) status "Historic".
- Pilot_(operating_system) wikiPageExternalLink pilot.html.
- Pilot_(operating_system) wikiPageID "11898409".
- Pilot_(operating_system) wikiPageRevisionID "604390657".
- Pilot_(operating_system) caption "Xerox Star desktop".
- Pilot_(operating_system) developer PARC_(company).
- Pilot_(operating_system) hasPhotoCollection Pilot_(operating_system).
- Pilot_(operating_system) language English_language.
- Pilot_(operating_system) name "Pilot".
- Pilot_(operating_system) programmedIn Mesa_(programming_language).
- Pilot_(operating_system) released "1981".
- Pilot_(operating_system) supportedPlatforms "Xerox Star workstations".
- Pilot_(operating_system) ui Graphical_user_interface.
- Pilot_(operating_system) wordnet_type synset-operating_system-noun-1.
- Pilot_(operating_system) workingState "Historic".
- Pilot_(operating_system) subject Category:1981_introductions.
- Pilot_(operating_system) subject Category:History_of_human–computer_interaction.
- Pilot_(operating_system) subject Category:Proprietary_operating_systems.
- Pilot_(operating_system) subject Category:Window-based_operating_systems.
- Pilot_(operating_system) subject Category:Xerox.
- Pilot_(operating_system) type BodyPart105220461.
- Pilot_(operating_system) type Orifice105249636.
- Pilot_(operating_system) type Os105302422.
- Pilot_(operating_system) type Part109385911.
- Pilot_(operating_system) type Passage105248181.
- Pilot_(operating_system) type PhysicalEntity100001930.
- Pilot_(operating_system) type Structure105225602.
- Pilot_(operating_system) type Thing100002452.
- Pilot_(operating_system) type Software.
- Pilot_(operating_system) type Work.
- Pilot_(operating_system) type CreativeWork.
- Pilot_(operating_system) type InformationEntity.
- Pilot_(operating_system) comment "Pilot was a single-user, multitasking operating system designed by Xerox PARC in early 1977. Pilot was written in the Mesa programming language, totalling about 24,000 lines of code.Pilot was designed as a single user system in a highly networked environment of other Pilot systems, with interfaces designed for inter-process communication (IPC) across the network via the Pilot stream interface.".
- Pilot_(operating_system) label "Pilot (operating system)".
- Pilot_(operating_system) label "Pilot".
- Pilot_(operating_system) sameAs m.02rx7vn.
- Pilot_(operating_system) sameAs Q4046962.
- Pilot_(operating_system) sameAs Q4046962.
- Pilot_(operating_system) sameAs Pilot_(operating_system).
- Pilot_(operating_system) wasDerivedFrom Pilot_(operating_system)?oldid=604390657.
- Pilot_(operating_system) isPrimaryTopicOf Pilot_(operating_system).
- Pilot_(operating_system) name "Pilot".