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- IBM_AP-101 abstract "The IBM AP-101 is an avionics computer that has been used in the U.S. Space Shuttle, the B-52 and B-1B bombers, and other aircraft. It is a repackaged version of the AP-1 used in the F-15 fighter. When it was designed, it was a high-performance pipelined processor with core memory. While today its specifications are exceeded by most of the modern microprocessors, it was considered high-performance for its era as it could process 480,000 instructions per second (compared to the 7,000 instructions per second of the computer used on Gemini spacecraft). It remains in service (formerly on the space shuttle) because it works and is flight-certified, whereas a new certification would be too expensive. The Space Shuttle AP-101s were augmented by glass cockpit technology.The AP-101, being the top-of-the-line of the System/4 Pi range, shares its general architecture with the System/360 mainframes. It has 16 32-bit registers, and uses a microprogram to define an instruction set of 154 instructions. Originally only 16 bits were available for addressing memory; later this was extended with four bits from the program status word register, allowing a directly addressable memory range of 1M locations.The B-1B bomber employed a network of eight model AP-101F computers.The AP-101B originally used in the Shuttle had core memory. The AP-101S upgrade in the early 1990s used semiconductor memory.The space shuttle used five AP-101 computers as "general-purpose computers" (GPCs). Four operate in sync, for redundancy, while the fifth is a backup running software written independently. The shuttle software was written in HAL/S, a special-purpose high-level language, whereas AP-101s used by the US Air Force are mostly programmed in JOVIAL, such as the system found on the B-1B Lancer bomber.".
- IBM_AP-101 thumbnail Space_Shuttle_General_Purpose_Computer.jpg?width=300.
- IBM_AP-101 wikiPageExternalLink shuttle.
- IBM_AP-101 wikiPageExternalLink gpc.html.
- IBM_AP-101 wikiPageExternalLink Ch4-3.html.
- IBM_AP-101 wikiPageID "33662815".
- IBM_AP-101 wikiPageLength "4372".
- IBM_AP-101 wikiPageOutDegree "32".
- IBM_AP-101 wikiPageRevisionID "666852745".
- IBM_AP-101 wikiPageWikiLink 32-bit.
- IBM_AP-101 wikiPageWikiLink Avionics.
- IBM_AP-101 wikiPageWikiLink B-1B.
- IBM_AP-101 wikiPageWikiLink B-52_Stratofortress.
- IBM_AP-101 wikiPageWikiLink Boeing_B-52_Stratofortress.
- IBM_AP-101 wikiPageWikiLink Category:Guidance_computers.
- IBM_AP-101 wikiPageWikiLink Category:IBM_computers.
- IBM_AP-101 wikiPageWikiLink Category:Military_computers.
- IBM_AP-101 wikiPageWikiLink Computer.
- IBM_AP-101 wikiPageWikiLink Core_memory.
- IBM_AP-101 wikiPageWikiLink F-15_Eagle.
- IBM_AP-101 wikiPageWikiLink Gemini_spacecraft.
- IBM_AP-101 wikiPageWikiLink Glass_cockpit.
- IBM_AP-101 wikiPageWikiLink S.
- IBM_AP-101 wikiPageWikiLink High-level_language.
- IBM_AP-101 wikiPageWikiLink High-level_programming_language.
- IBM_AP-101 wikiPageWikiLink IBM.
- IBM_AP-101 wikiPageWikiLink 360.
- IBM_AP-101 wikiPageWikiLink 4_Pi.
- IBM_AP-101 wikiPageWikiLink IBM_mainframe.
- IBM_AP-101 wikiPageWikiLink Instruction_set.
- IBM_AP-101 wikiPageWikiLink Instructions_per_second.
- IBM_AP-101 wikiPageWikiLink International_Business_Machines.
- IBM_AP-101 wikiPageWikiLink JOVIAL.
- IBM_AP-101 wikiPageWikiLink JOVIAL_(programming_language).
- IBM_AP-101 wikiPageWikiLink Magnetic-core_memory.
- IBM_AP-101 wikiPageWikiLink McDonnell_Douglas_F-15_Eagle.
- IBM_AP-101 wikiPageWikiLink Mega-.
- IBM_AP-101 wikiPageWikiLink Microcode.
- IBM_AP-101 wikiPageWikiLink Microprocessor.
- IBM_AP-101 wikiPageWikiLink Microprogram.
- IBM_AP-101 wikiPageWikiLink Processor_register.
- IBM_AP-101 wikiPageWikiLink Project_Gemini.
- IBM_AP-101 wikiPageWikiLink Rockwell_B-1_Lancer.
- IBM_AP-101 wikiPageWikiLink Semiconductor_memory.
- IBM_AP-101 wikiPageWikiLink Space_Shuttle_program.
- IBM_AP-101 wikiPageWikiLink Status_register.
- IBM_AP-101 wikiPageWikiLink 360.
- IBM_AP-101 wikiPageWikiLink 4_Pi.
- IBM_AP-101 wikiPageWikiLink US_Air_Force.
- IBM_AP-101 wikiPageWikiLink United_States_Air_Force.
- IBM_AP-101 wikiPageWikiLink File:IBM_AP-101S_memory_board.jpg.
- IBM_AP-101 wikiPageWikiLink File:Space_Shuttle_General_Purpose_Computer.jpg.
- IBM_AP-101 wikiPageWikiLinkText "AP-101".
- IBM_AP-101 wikiPageWikiLinkText "GPC".
- IBM_AP-101 wikiPageWikiLinkText "IBM AP-101".
- IBM_AP-101 wikiPageWikiLinkText "orbiter general-purpose computers".
- IBM_AP-101 hasPhotoCollection IBM_AP-101.
- IBM_AP-101 wikiPageUsesTemplate Template:As_of.
- IBM_AP-101 wikiPageUsesTemplate Template:Guidance_Computer.
- IBM_AP-101 wikiPageUsesTemplate Template:Merge_to.
- IBM_AP-101 wikiPageUsesTemplate Template:Reflist.
- IBM_AP-101 wikiPageUsesTemplate Template:Use_dmy_dates.
- IBM_AP-101 subject Category:Guidance_computers.
- IBM_AP-101 subject Category:IBM_computers.
- IBM_AP-101 subject Category:Military_computers.
- IBM_AP-101 hypernym Computer.
- IBM_AP-101 type Article.
- IBM_AP-101 type InformationAppliance.
- IBM_AP-101 type Article.
- IBM_AP-101 type Avionic.
- IBM_AP-101 type Class.
- IBM_AP-101 type Component.
- IBM_AP-101 type Computer.
- IBM_AP-101 type Product.
- IBM_AP-101 comment "The IBM AP-101 is an avionics computer that has been used in the U.S. Space Shuttle, the B-52 and B-1B bombers, and other aircraft. It is a repackaged version of the AP-1 used in the F-15 fighter. When it was designed, it was a high-performance pipelined processor with core memory.".
- IBM_AP-101 label "IBM AP-101".
- IBM_AP-101 sameAs AP-101.
- IBM_AP-101 sameAs IBM_AP-101.
- IBM_AP-101 sameAs IBM_AP-101.
- IBM_AP-101 sameAs m.025wdw3.
- IBM_AP-101 sameAs Q3893632.
- IBM_AP-101 sameAs Q3893632.
- IBM_AP-101 wasDerivedFrom IBM_AP-101?oldid=666852745.
- IBM_AP-101 depiction Space_Shuttle_General_Purpose_Computer.jpg.
- IBM_AP-101 isPrimaryTopicOf IBM_AP-101.