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• End to end
  ...rms) to implement things such as reliabilty in a [[communication network]] system.
  807 bytes (129 words) - 22:28, 13 December 2018
• Email
  ...ng a message from an originator to a 'mailbox' on the destination [[host]] system. The recipient runs an application [[program]] to retrieve it and view it a
  2 KB (250 words) - 13:33, 11 January 2024
• File Transfer Protocol
  ...withstanding), used to transfer [[file]]s to or from a [[server]] [[host]] system.
  557 bytes (76 words) - 23:19, 9 June 2023
• IBM 7030 Stretch
  <!-- | operating system = --> ...IBM, it was later recognized as the foundation of the success of the [[IBM System/360]]; both its technology (it was the first machine IBM built with [[trans
  3 KB (467 words) - 16:37, 11 January 2024
• Standard Modular System
  The '''Standard Modular System''' ('''SMS''') was a [[circuit]] packaging system developed by [[International Business Machines|IBM]]. Developed in early 19 ...BM computers until the [[Solid Logic Technology]] system used in the [[IBM System/360]] was developed in 1964; but even then, SMS continued to be very widely
  1 KB (215 words) - 01:50, 20 December 2018
• IBM 650
  ...ww.bitsavers.org/pdf/ibm/650/24-5000-0_GeneralInfo.pdf 650 Data Processing System Bulletin - General Information] ...a-processing System with 355 Random Access Memory - Manual of Operation] - system with disk drive(s)
  4 KB (620 words) - 21:08, 18 March 2024
• IBM 701
  <!-- | operating system = SOS, IBSYS, IBJOB --> ...each holding 2048 long-words, capable of transferring 800 words/second. A system included four [[magnetic tape drive]]s, using 1/2" plastic tape; the first
  2 KB (306 words) - 20:54, 8 August 2022
• Williams tube
  ...over.html Covering Notes for Tom Kilburn's 1947 report to TRE: ''A Storage System for Use with Binary Digital Computing Machines'']
  2 KB (354 words) - 15:57, 14 March 2024
• IBM 604 Electronic Calculating Punch
  ...f the electrical and electronic components, in order to produce a reliable system.
  3 KB (457 words) - 03:42, 21 December 2023
• IBM 7070
  It was built out of [[Standard Modular System]] cards; the complete machine contained about 14,000 of these cards. It mos The 7300 moveable-head [[disk]] system could store up to to 6 million digits per drive; up to four drives could be
  3 KB (478 words) - 14:49, 9 April 2024
• H777 Power Supply
  .../1124/EK-11024-TM-001_PDP11_24_System_Technical_Manual_Jun81.pdf PDP-11/24 System Technical Manual] - covers the communication regulator in Appendix A
  3 KB (519 words) - 15:41, 10 July 2023
• MS11-M MOS memory
  ...ch 32 data bits wide, with 7 additional bits for the ECC. On power-on, the system is frozen (via negation of the ACLO UNIBUS signal) for up to 451 msec while
  3 KB (473 words) - 20:02, 30 July 2023
• Window
  * [[X Window System]]
  566 bytes (89 words) - 17:24, 18 February 2024
• Protected mode
  ...tected from another program, merely that it ''can be'', if the [[operating system]] sets up the [[memory management]], etc properly.
  1 KB (185 words) - 16:06, 15 March 2021
• Real mode
  ...6-64 computer architecture, long mode is the mode where a 64-bit operating system can access 64-bit instructions and registers. ... Real mode or virtual 8086
  3 KB (536 words) - 16:57, 19 January 2023
• Hardware port
  ...rt''', in [[hardware]] is a means of gaining access to a computer or a sub-system.
  473 bytes (79 words) - 04:30, 13 December 2018
• Debugger
  ...in the other program. They can be used on machines without an [[operating system]], in which case the debugger has to share the machine with the program bei These debuggers often operate on a [[core dump]], where the operating system stores the contents of a process' [[address space]], etc on [[secondary sto
  2 KB (293 words) - 14:03, 27 June 2022
• Basic Input/Output System
  The '''Basic Input/Output System''' (usually known by its acronym, '''BIOS''') is [[software]] stored, in [[ ...trap]] from [[secondary storage]] which can load and start the [[operating system]].
  2 KB (248 words) - 00:50, 20 December 2018
• User Datagram Protocol
  ...[Domain Name System]]) and application protocols (including [[Network File System]], [[Voice over IP]], etc) are built on top of UDP.
  1 KB (215 words) - 15:10, 26 October 2018
• NeXT Computer, Inc
  ...advanced [[workstation]]s. They, and their [[object-oriented]] [[operating system]] ([[NeXTSTEP]]) were very influential. The [[World Wide Web]] was invented
  319 bytes (41 words) - 22:22, 7 April 2021
• Motorola MC68030
  ...sions which omitted the [[memory management]] were produced for [[embedded system]]s.
  2 KB (231 words) - 20:39, 4 March 2022
• Microkernel
  ...unctions performed in the kernel in a 'monolithic' kernel (e.g. the [[file system]]) are moved out to 'privileged' [[process]]es, which perform those functio .... the ability to switch to a new version of the file system code while the system is running), the division usually imposes some overhead, which is un-accept
  1 KB (220 words) - 23:15, 14 December 2023
• Motherboard
  ...t to allow easy replacement if there is a failure, but mostly to allow the system to be upgraded with more/larger memory cards.
  1 KB (197 words) - 15:09, 21 March 2023
• Backward compatibility
  ...ackward compatibility''' refers to an important goal in the evolution of a system: if, after a change to an [[interface]] or [[protocol]], a modified compone
  701 bytes (112 words) - 19:36, 14 December 2018
• Domain Name System
  The '''Domain Name System''' (usually abbreviated to '''DNS''') is a replicated [[distributed databas ...organized as a [[hierarchy]]; like [[file]] names in a hierarchical [[file system]], a complete DNS name consists of a number of parts, each one of which sel
  2 KB (263 words) - 18:19, 12 December 2023
• Hypervisor
  * Type 1 - 'native' hypervisors, which are [[operating system]]s which run directly on the bare machine ...d, Type 1 hypervisors avoid the need for the host to run another operating system, and they instead run directly on the bare-metal hardware. Examples of Type
  1 KB (154 words) - 15:11, 13 January 2024
• Hypertext Markup Language
  ...nes allowed for considerable activity in the [[browser]] on the [[client]] system in response to [[user]] actions.
  490 bytes (70 words) - 23:49, 16 December 2018
• RP10 disk controller
  ...-10-XSRMA-A-D%20DECsystem10%20System%20Reference%20Manual.pdf DECsystem-10 System Reference Manual] - documents the RP10 in sections 7-5&ndash;7-8 (pp. 243-2
  1 KB (184 words) - 21:59, 8 March 2023
• DF10 Data Channel
  ...indirectly (through the [[device controller]]s which attach to it) to the system's [[PDP-10 I/O Bus|I/O bus]], to allow the [[Central Processing Unit|CPU]] ...oject MAC]] [[KA10]] DM and ML machines running [[Incompatible Timesharing System|ITS]]. The control word has the negated word count in bits 3-17, and the 2
  2 KB (390 words) - 07:32, 6 September 2023
• Protection key
  ...re a mechanism used in [[memory management]] on [[multi-user]] [[operating system]]s to prevent one [[user]]'s buggy or malevolent [[program]] from damaging
  527 bytes (81 words) - 21:35, 15 December 2018
• Open Shortest Path First
  ...it also 'borrowed' a few ideas from [[Intermediate System to Intermediate System|IS-IS]].
  514 bytes (79 words) - 22:53, 13 December 2018
• Intermediate System to Intermediate System
  ...ol]]; initially designed for the [[ISO]] [[protocol suite]] ('Intermediate System' is their term for a [[router]]), it has been adapted for use with the [[TC
  527 bytes (78 words) - 22:56, 13 December 2018
• Routing architecture
  A '''routing architecture''' is the system of how paths across [[communication network]]s are decided.
  3 KB (472 words) - 20:46, 5 July 2022
• Data network
  ...]] [[circuit-switching]] networks: the original analog voice communication system can be used to carry data by use of a [[modem]]
  1 KB (153 words) - 17:26, 16 February 2024
• BC11A UNIBUS cable
  ...ther [[UNIBUS]] elements (such as [[:Category: UNIBUS Processors|CPUs]], [[system unit]]s, and free-standing [[peripheral|devices]] such as the [[RP11 disk c
  1 KB (176 words) - 12:47, 16 October 2021
• MIT Artificial Intelligence Laboratory
  * [[Incompatible Timesharing System]] * [[Knight TV system]]
  2 KB (226 words) - 00:38, 28 February 2024
• RS64 disk drive
  ...P-8 family|PDP-8]] or other [[List of Programmed Data Processors|early DEC system]] [[device controller]] has yet been seen for it, although the look of its
  2 KB (258 words) - 22:12, 14 August 2023
• RS03/04 disk drive
  ...ead_disk_system_maintenance_manual_Aug1974.pdf RJS04/RJS03 fixed-head disk system maintenance manual] (DEC-11-HRJSA-B-D)
  3 KB (488 words) - 18:37, 14 August 2023
• LSI-11 chip set
  .../Computer_Engineering/00000125.htm A Minicomputer-Compatible Microcomputer System: The DEC LSI-11], in C. Gordon Bell, J. Craig Mudge, John. E. McNamara, ''C ....bitsavers.org/pdf/dec/pdp11/1103/Titelbaum_LSI-11_1975.pdf The LSI-11 - A System Microcomputer]
  5 KB (773 words) - 22:42, 20 December 2023
• DIBOL
  ...a better [[compiler]] and [[interpreter]]. A [[time-sharing]] [[operating system]] allowed several users to run DIBOL applications simultaneously (in the sa
  1 KB (201 words) - 16:21, 16 October 2019
• BA11-E Mounting Box
  ...'''BA11-E mounting box''' was one of the two earliest earliest standard [[system unit]] [[backplane]] [[mounting box]] produced by [[Digital Equipment Corpo ...tra [[core memory|core]] [[main memory]] systems (each in their own custom system unit) and other devices, and had a blank front panel.
  2 KB (397 words) - 03:13, 11 July 2023
• H720 Power Supply
  ...11-C]] and [[BA11-E Mounting Box]]es, the two earliest earliest standard [[system unit]] [[backplane]] [[mounting box]]es for the [[PDP-11]] line.
  2 KB (414 words) - 14:49, 10 July 2023
• Display program
  ...w on the [[display]]. The instructions are stored in [[memory]], often the system's [[main memory]].
  969 bytes (144 words) - 17:51, 30 August 2022
• Disk operating system
  ...ort for [[secondary storage]] on [[disk]]s, principally by adding a [[file system]]. ..., and then a DOS was created/released for them. Examples include the [[IBM System/360]], the [[PDP-11]], and the [[IBM PC]] and [[Apple II]].
  505 bytes (76 words) - 21:58, 15 December 2018
• MS780 Memory System
  ...s a [[Metal Oxide Semiconductor|MOS]] [[Dynamic RAM|DRAM]] [[main memory]] system for the [[VAX-11/780]]. It was 64 [[bit]]s wide, to interface to the -11/78
  3 KB (502 words) - 20:54, 15 May 2024
• FCO CIBCI-I001
  |EQ Kit Variation System/Option Applic: N/A | System implementation of this microcode requires that the CIBCI is currently
  49 KB (4,759 words) - 09:21, 27 February 2023
• Maze War
  ...ystem]]. Another version was written in [[Logo]] on the [[SITS]] operating system.
  1 KB (197 words) - 16:06, 29 March 2023
• Imlac PDS-1
  ...ot have any [[secondary storage]], and was only a [[terminal]] on a larger system.
  416 bytes (57 words) - 15:35, 29 March 2023
• DB11-A Bus Repeater
  It consists of a custom [[system unit]] [[backplane]], holding a number of smaller [[FLIP CHIP]]s; mostly [[ ...installation in later [[BA11 mounting boxes]], the paddle card of a G772 [[system unit]] [[harness]] adaptor can be plugged into the [[DEC edge connector con
  2 KB (327 words) - 18:19, 27 March 2023
• B programming language
  ..., Doug McIlroy created an implementation of [[TMG]] for the early [[UNIX]] system (on the [[PDP-7]]); this inspired Ken Thompson to produce a [[compiler]] fo
  2 KB (345 words) - 16:43, 7 December 2023
• DD11-C backplane
  ...-C backplane''' is a 4-slot [[Modified UNIBUS Device|MUD]] [[backplane]] [[system unit]]. It was normally installed in a [[BA11 mounting boxes|BA11 mounting
  821 bytes (130 words) - 10:32, 27 March 2023
• DD11-D backplane
  ...-D backplane''' is a 9-slot [[Modified UNIBUS Device|MUD]] [[backplane]] [[system unit]]. It was normally installed in a [[BA11 mounting boxes|BA11 mounting
  822 bytes (130 words) - 10:33, 27 March 2023
• DD11-P backplane
  ...-P backplane''' is a 9-slot [[Modified UNIBUS Device|MUD]] [[backplane]] [[system unit]], with special modifications so it could be used to hold the [[KD11-E
  1 KB (241 words) - 16:03, 30 March 2023
• UNIX V6 dump analysis
  ...o kinds of dump analysis on the [[UNIX Sixth Edition|UNIX V6]] [[operating system]], with some overlap between the two. ...f a dump of the complete [[main memory]] of a [[PDP-11]] running Unix; the system as distributed only supports doing such dumps to [[magnetic tape]] (althoug
  4 KB (719 words) - 12:07, 2 July 2022
• UNIX V6 internals
  ...s hand-crafted; if then 'forks' into two, using the standard UNIX fork() [[system call]] (which creates a 'clone' of the existing process). ...ram (the binary for which is built into the kernel) which does an 'exec()' system call, to read in and run "/etc/init". That process/command then does anothe
  9 KB (1,516 words) - 13:48, 8 April 2024
• KM11-A Maintenance Set
  ...pdf/dec/pdp11/1140/PDP-1140_System_Engr_Drawings_Rev_P_Jun74.pdf PDP-11/40 system engineering drawings] - the KM11 is covered on pp. 123-125 <!--
  3 KB (421 words) - 18:49, 27 February 2023
• MD10 core memory
  The '''MD10''' was a [[core memory|core]] [[main memory]] system for the early [[PDP-10]]s, principally the [[KA10]]. An MD10 could contain ...he [[Central Processing Unit|CPU]] uses one port (in a [[multi-processor]] system, one per CPU); the others are used by [[channel]]s (such as a [[DF10 Data
  1 KB (231 words) - 13:54, 2 August 2023
• MF10 core memory
  The '''MF10''' was a [[core memory|core]] [[main memory]] system for the mid-period [[PDP-10]]s, principally the [[KI10]], although it was a ...ral Processing Unit|CPU]] uses at least one port (in a [[multi-processor]] system, at least one per CPU); the others are used by [[channel]]s (such as a [[DF
  2 KB (271 words) - 12:37, 5 November 2023
• MG10 core memory
  The '''MG10''' was a [[core memory|core]] [[main memory]] system for the [[PDP-10]]s, principally the [[KI10]] and early [[KL10]]s. An MG10 ...ral Processing Unit|CPU]] uses at least one port (in a [[multi-processor]] system, at least one per CPU); the others are used by [[channel]]s (such as a [[DF
  2 KB (342 words) - 12:33, 5 November 2023
• MH10 core memory
  The '''MH10''' was a [[core memory|core]] [[main memory]] system for the [[PDP-10]]s, principally the [[KI10]] and early [[KL10]]s. An MH10 ...ral Processing Unit|CPU]] uses at least one port (in a [[multi-processor]] system, at least one per CPU); the others are used by [[channel]]s (such as a [[DF
  3 KB (407 words) - 12:40, 5 November 2023
• VGA
  ...unted for by, and is well within the limits of the retrace synchronisation system. In fact, CGA itself was further adrift (as it could only scan 262 lines pe
  11 KB (1,681 words) - 12:41, 27 February 2024
• Microsoft BASIC
  ...the 8 KB BIOS ROM of the original IBM PC, and did not require an operating system to run. Cassette BASIC provided the default user interface invoked by the B ...hing, everything above it. BASIC 1.x's PAINT command also makes use of the system stack for storage and when filling in complex areas, it was possible to pro
  9 KB (1,473 words) - 03:37, 16 January 2024
• Unix SYSVr3
  '''Unix System V, Release 3''' was released in 1987. The final version was Release 3.2 in * Remote File System (RFS)
  5 KB (717 words) - 19:34, 21 October 2023
• S-1 supercomputer
  ...ded that each [[Central Processing Unit|processor]] in a full 16-processor system in the second-generation design would have about the processing power of a ...]ation; among other things, the [[word]] size was 36 bits. The [[operating system]] planned for the machine, [[Amber]], was heavily based on [[Multics]]. [[C
  3 KB (478 words) - 20:31, 1 March 2024
• DEC Power Line Monitor
  ...oard|board]] used in the [[H742 Power Supply|H742/H7420]] and [[H765 Power System|H765]] [[power supply|power supplies]] to produce a modest amount of +15V [ ...cant differences between the two in how they interfaced to the rest of the system; the main difference beween the two was that the former produced outputs on
  3 KB (508 words) - 01:13, 16 June 2022
• HP BASIC
  ...t of the BASIC language and a rudimentary user account and program library system. ...n which it ran, such as '''HP 2000C Time-Shared BASIC''' and the operating system came in different varieties&nbsp;— 2000A, 2000B, 2000C, High-Speed 2000C,
  2 KB (342 words) - 19:30, 20 June 2023
• RH20 MASSBUS controller
  ...t. and the latter to give the RH20 direct access to the main memory of the system, to allow it to use [[Direct Memory Access|DMA]] to move data directly from ...dp10/KL10/EK-1080U-SD-003_1080_1090_SysDescr_Jan77.pdf decsystem-1080/1090 System Description] (EK-1080U-SD-003) - the RH20 is covered on pp. 77-78 of the PD
  2 KB (294 words) - 12:59, 12 November 2023
• Superfoonly
  ...d University Design System|SUDS]] was created; it was a pioneering [[CAD]] system that went on to have several very important descendants. In another, it als
  1 KB (180 words) - 21:48, 6 January 2024
• Stanford Artificial Intelligence Laboratory
  ...ne was one of the very first [[CAD]] systems, [[Stanford University Design System|SUDS]], done as part of the later-terminated [[Superfoonly]] project at SAI ...DP-10]] machines, running their own [[WAITS]] [[time-sharing]] [[operating system]]. They started with a [[PDP-6]]; later, a [[KA10]] was added (eventually e
  4 KB (582 words) - 02:20, 10 January 2024
• SAIL
  * The computer system running [[WAITS]] at the [[Stanford Artificial Intelligence Laboratory|Stan * In a looser sense, SAIL can refer to the WAITS monitor and operating system. Especially before 1976, when the name WAITS was invented.
  440 bytes (56 words) - 07:44, 9 August 2023
• Systems Concepts DK-10
  ...lligence Laboratory]] [[KA10]] computer running [[Incompatible Timesharing System|ITS]].
  2 KB (311 words) - 15:15, 24 October 2022
• Ampex ARM10
  ...memory]] unit (reported on the [[KA10]] MIT-AI [[Incompatible Timesharing System|ITS]] machine); * the large '''ARM-10L''' was also a core system (one was attached to the [[KL10]] MIT-MC ITS machine)
  2 KB (229 words) - 04:56, 11 November 2023
• QBUS CPU ODT
  ...nd [[KDJ11 CPUs]], which also use ODT, do not have this limitation; e.g. a system consisting only of a [[KDF11-A CPU]] and a serial console will run ODT, whi
  2 KB (327 words) - 05:59, 22 October 2021
• LSI-11 CPUs
  ...nd [[KDJ11 CPUs]], which also use ODT, do not have this limitation; e.g. a system consisting only of a [[KDF11-A CPU]] and a serial console will run ODT. .../Computer_Engineering/00000323.htm A Minicomputer-Compatible Microcomputer System: The DEC LSI-11], in C. Gordon Bell, J. Craig Mudge, John. E. McNamara, ''C
  3 KB (453 words) - 16:35, 6 April 2024
• KE11-A Extended Arithmetic Element
  ...d dual [[printed circuit board|boards]], plugged into a custom four-slot [[system unit]] [[backplane]] (details below).
  5 KB (680 words) - 21:17, 2 July 2023
• Arbitration
  ...icular resource. In [[hardware]], there are two basic ways to do this; the system might use a single central [[arbiter]], or there might be some sort of dist
  395 bytes (59 words) - 08:30, 19 March 2023
• Besta-88
  ...and a single picture of a [[booting]] (or non-booting as the case may be) system.
  2 KB (348 words) - 16:20, 2 March 2021
• DP11-A Synchronous Line Interface
  ...uit board|board]], which were installed in a custom 4-slot [[backplane]] [[system unit]]. It used one of the [[DF11 Communications Line Adapter‎]]s to inte The [[address]]es shown are for the first DP11-A in a system; additional ones are normally set to be at 774760, 774750, etc to 774400.
  6 KB (849 words) - 04:17, 18 February 2023
• DJ11 Asynchronous 16-Line Multiplexer
  The implementation took a single custom [[system unit]] [[backplane]], containing multiple cards:
  5 KB (694 words) - 11:36, 18 February 2023
• Prime Computer
  ...cs]] (on which several of the founders of Prime had worked) - although the system, [[PRIMOS]], was written in [[FORTRAN]]!
  621 bytes (80 words) - 01:01, 13 January 2024
• PRIMOS
  '''PRIMOS''' was a proprietary [[operating system]] from [[Prime Computer]]. ...MOS 2) and later DOSVM (PRIMOS 3), but starting with PRIMOS 4, on the P400 system, PRIMOS was the name that stuck. There were many major releases of PRIMOS.
  2 KB (256 words) - 13:59, 28 September 2019
• DDT
  ...]] was a DDT written in PDP-11 [[assembly language]] (like the [[operating system|OS]] itself); it is not known if that was written from scratch, or came fro debugger with the [operating system] halted.
  6 KB (909 words) - 14:21, 27 June 2022
• DC11 asynchronous serial line interface
  The [[address]]es shown are for the first DC11 in a system; additional ones (up to 32 total) are normally set to be at 774010, 774020, The implementation used a single custom [[system unit]] [[backplane]], containing two independent DC11's, each consisting of
  3 KB (401 words) - 04:33, 18 February 2023
• Bus Arbitration on the Unibus and QBUS
  ...time it is useful to hand off this bus-master role to other devices in the system, either so they can access memory directly ([[Direct Memory Access|DMA]]) o The Unibus also has a priority Bus Grant system with four priority levels that work just like NPG but requests are made on
  21 KB (3,685 words) - 04:35, 28 November 2023
• DM11 Asynchronous 16-line Single-Speed Multiplexer
  The implementation of the basic DM11-AA used a custom double [[system unit]] [[backplane]], containing multiple cards; a [[flat cable]] connected The addresses shown are for the first DM11-AA11 in a system; additional ones (up to 16 total) are normally set to be at 775010, 775020,
  8 KB (1,088 words) - 02:24, 19 February 2023
• DM11-BB Modem Control Option
  ...ace|DH11]] interfaces. Both of these interfaces themselves used a custom [[system unit]] backplane, containing multiple cards; [[flat cable]]s connected this ...ferent versions of the DM11-BB (unfortunately, there is no accepted naming system for them). The DM11 and early models of the DH11 used the 'early version' o
  7 KB (975 words) - 04:15, 18 February 2023
• DM11 distribution panel
  Both of these devices used a custom [[system unit]] [[backplane]], containing multiple [[printed circuit board|cards]];
  4 KB (703 words) - 02:26, 19 February 2023
• QBUS backplanes
  ...ve; in the [[VS11 Graphic System|VS11]], it is used with a [[VSV11 Graphic System|VSV11]], and the VSV11's Video Bus is carried over the E-F connectors. Puzz
  4 KB (676 words) - 23:17, 6 April 2024
• KA650 CPU
  ...y the [[CFPA]], [[main memory]] control provided by [[CMCTL]], and various system support functions by the [[SSC]]. The only differences between the two CPUs are the system [[ROM]]s:
  3 KB (369 words) - 08:32, 12 September 2023
• MSV11-Q QBUS memory
  The ''MicroPDP-11/53 System Supplement Manual'' (below) has information on how to configure the MSV11-Q ...PDP11/AZ-GPTAA-MC_MicroPDP11_53_System_Supplement_Jun86.pdf MicroPDP-11/53 System Supplement Manual] (AZ-GPTAA-MC)
  6 KB (898 words) - 21:25, 16 March 2022
• KA650 Main Memory System
  The '''KA650 Main Memory System''' is the [[main memory]] sub-system for the [[VAX]] [[KA650 CPU]], and later [[KA655 CPU]]. It is split between ...troubleshooting, repair, and theory of operation of the KA650 Main Memory System.
  42 KB (5,493 words) - 15:53, 23 May 2024
• MXV11-A Multifunction Option Module
  ...]] device, and the RAM <!-- nor ROM --> cannot be used when it is in a Q22 system.
  2 KB (301 words) - 20:47, 13 July 2023
• BA11-A mounting box
  ...org/pdf/dec/unibus/EK-BA11A-TM-003_Aug83.pdf BA11-A Mounting Box and Power System Technical Manual] (EK-BA11A-TM-003)
  3 KB (416 words) - 03:07, 11 July 2023
• KT24 UNIBUS map option
  ...e [[M9312 ROM|M9312]]), and a [[power supply]] [[voltage]] monitor for the system. The KT24 was implemented as a single [[DEC card form factor|hex]] [[printe .../1124/EK-11024-TM-001_PDP11_24_System_Technical_Manual_Jun81.pdf PDP-11/24 System Technical Manual] - the KT24 is covered in Chapter 6 (pp. 162-174)
  2 KB (310 words) - 16:02, 6 February 2024
• DUP11 synchronous serial line interface
  <!-- The [[address]]es shown are for the first DP11-A in a system; additional ones are normally set to be at 774760, 774750, etc to 774400. -
  5 KB (809 words) - 04:21, 18 February 2023
• PDP-11 stacks
  ...modes, there are separate R6's for the two modes, so that the [[operating system]] can use the latter one for interrupt and trap handling, and thereby guara
  5 KB (891 words) - 12:14, 14 October 2022
• PC-DOS
  ...successors. The history of how PC-DOS came to be the principal [[Operating System]] for the PC is a story that has been told many times and a I will supply l ...os-contract A rather in-depth history of IBM's acquisition of an operating system from Microsoft]
  7 KB (1,129 words) - 20:40, 22 May 2023
• DEC Modules by bus
  | style="padding: 0 1em 0;" | MCU, JBOX System TAG Storage (TAG) [[#ref_1|[1]]] == [[Laser System Bus|LaserBUS]] Modules ==
  51 KB (6,185 words) - 15:20, 15 January 2024
• DHV11 asynchronous serial line interface
  The [[address]]es shown are for the first DHV11 in a system; additional ones are normally set to be at 17760460, 17760500.
  6 KB (894 words) - 11:33, 17 February 2023
• DPV11 synchronous serial line interface
  ...]], at [[baud rate]]s up to 56K bits/second (depending on [[software]] and system configuration). <!-- The [[address]]es shown are for the first DPV11 in a system; additional ones are normally set to be at 774760, 774750, etc to 774400. -
  6 KB (858 words) - 14:28, 17 February 2023
• Digital Data Communications Message Protocol
  says: "The ULTRIX Operating System, Version 4.5 [[Software Product Description]] 26.40.32"
  5 KB (747 words) - 18:15, 29 September 2023
• MINI-UNIX
  MINI-UNIX supports almost all the standard V6 system calls, with the exception of: [[Pipe]]s are not supported, not only because of space in the [[operating system|OS]], but because a process [[swapping|swap]]-out and -in will be required
  8 KB (1,243 words) - 21:16, 21 June 2023
• LSX
  ...al, as is that to the tty driver; the interface to the block device buffer system is also identical. * since the system is limited to less than 64KB of memory, the 'extended memory' field in the
  7 KB (1,142 words) - 08:14, 8 November 2022
• Interdata 7/32
  ...struction set architecture|ISA]] was roughly modelled on that of the [[IBM System/360]] [[mainframe]].
  2 KB (286 words) - 18:26, 22 December 2023
• DEC part number
  ...the first hyphen is omitted). [[Digital Equipment Corporation|DEC]] had a system for their part numbers, such that looking at a part number will generally t
  3 KB (363 words) - 16:38, 14 August 2022
• DHU11 asynchronous serial line interface
  ...ut likely the major one was cost: the DH11 consisted of an entire double [[system unit]] [[backplane]], containing multiple cards; the DHU11 was a single car The [[address]]es shown are for the first DHU11 in a system; additional ones are normally set to be at 760040, 760060, etc.
  5 KB (710 words) - 02:28, 19 February 2023
• DZV11 asynchronous serial line interface
  The [[address]]es shown are for the first DZ11 in a system (provided that there are no other devices in the [[floating device address
  5 KB (684 words) - 11:36, 17 February 2023
• DZQ11 asynchronous serial line interface
  The [[address]]es shown are for the first DZ11 in a system (provided that there are no other devices in the [[floating device address
  5 KB (677 words) - 11:45, 17 February 2023
• DOS-11
  '''DOS-11''' was a [[disk]]-based [[operating system]] for the [[PDP-11]] family.
  363 bytes (48 words) - 02:47, 23 May 2023
• UNIBUS backplanes
  ...rom [[Digital Equipment Corporation|DEC]], the [[DD11 backplanes]], were [[system unit]]s which were normally installed in a [[BA11 mounting boxes|BA11 mount
  2 KB (267 words) - 23:18, 6 April 2024
• PWB/UNIX
  ...ions: several major new ones, such as 'make' and the [[Source Code Control System]], and also changes to the shell. The latter included both functionality im ...for other, larger computers. Those machines were usually [[batch operating system|batch processing]] systems, so extensive [[remote job entry]] sub-systems w
  7 KB (1,109 words) - 16:49, 27 September 2023
• T-11 chip
  ...e [[PDP-11 architecture]]. It was primarily intended for use in [[embedded system]]s, but was also used in the [[KXT11]] [[QBUS]] [[Central Processing Unit|C
  2 KB (283 words) - 02:27, 20 September 2022
• XXDP diagnostic package
  ...e diagnostics themselves were actually developed under another [[operating system|OS]], such as [[RSX-11]]; XXDP was only used to run them.) ...en names such as "RKDP" ('RK Diagnostic Package'); typically, a particular system was delivered with an RKDP pack (say) which contained all the diagnostics a
  2 KB (260 words) - 19:56, 16 November 2023
• MLP-900
  * [ftp://ftp.isi.edu/isi-pubs/rr-77-58.pdf "PRIM System: Overview"] * [ftp://ftp.isi.edu/isi-pubs/tm-78-7.pdf "PRIM System: Tool Builders Manual and User Reference Manual"]
  3 KB (477 words) - 15:39, 24 April 2024
• PDP-4
  | logic type = germanium [[transistor]] [[System Module]]s <!-- | operating system = DECSYS-7 -->
  6 KB (775 words) - 20:00, 7 February 2024
• Bank switching
  ...]] from interfering with another (in a [[multi-tasking|multi-programming]] system), or ii) hide the real [[address]]es a program is occupying in [[main memor
  3 KB (468 words) - 15:36, 7 November 2021
• RL8-A disk controller
  Start at 21; the loaded [[operating system]] will overlay the bootstrap.
  7 KB (982 words) - 21:30, 26 May 2021
• Pure code
  ...for pure code was to allow a number of [[process]]es in a [[time-sharing]] system which were running the same program to share a single copy of that object c ...ad-only memory|ROM]] for program storage became common (e.g. in [[embedded system]]s), it was obviously necessary for the code in the ROM to be pure code.
  956 bytes (155 words) - 14:46, 12 June 2021
• PDP-11 C stack operation
  ...return point, on the top of the stack. Two special elements of [[run-time system|run-time support]], csv and cret, set up and tear down the [[stack frame]] by the UNIX system during the EXEC system call. If you want to
  10 KB (1,556 words) - 19:50, 16 November 2023
• DA10 Twelve- and Eighteen-Bit Computer Interface
  The DA10 is used in the DC68A Data Communication System, which uses a [[PDP-8/I]]. ...DA10_PDP8_9_Interface_System_Description_Sep69.pdf DA-10 PDP-8/9 Interface System Description] (DEC-10-IACB-D)
  3 KB (442 words) - 14:51, 7 March 2023
• DTE20 Ten-Eleven Interface
  ...ed on the PDP-11); or it can also function as a control and [[diagnostic]] system for the main CPU: loading [[microcode]], [[bootstrap]]ping, etc. ...dp10/KL10/EK-1080U-SD-003_1080_1090_SysDescr_Jan77.pdf decsystem-1080/1090 System Description] (EK-1080U-SD-003) - the DTE20 is covered on pp. 75-76 of the P
  2 KB (410 words) - 13:14, 12 November 2023
• DIA20 IBus Adapter
  ...n one. Two separate IBuses are provided per CPU. (In a [[multi-processor]] system, each CPU has a separate DIA20, if configured to have one.) Later KL10s did
  2 KB (282 words) - 12:34, 6 November 2023
• DMA20 Memory Bus Adapter
  ...ore memory|core]] main memory to be used on one. (In a [[multi-processor]] system, each CPU has a separate DMA20, if configured to have one; the [[multi-port
  2 KB (274 words) - 15:10, 9 November 2023
• PDP-1-X Time Sharing System
  [[Time-sharing]] [[operating system]] created at [[MIT]]'s [[RLE]] on the [[PDP-1-X]] (which was modified for t ...bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]
  735 bytes (105 words) - 09:15, 12 November 2021
• PCLSRing
  ...ng (from [[Program Counter]] and [[luser]], the [[Incompatible Timesharing System|ITS]] jargon for [[user]]). ...system]]. In some form it can also be found in the [[Berkeley Timesharing System]] and [[SITS]].
  2 KB (305 words) - 08:50, 23 November 2023
• Bolt, Beranek, and Newman
  ...the [[BBN Pager]] for the [[KA10]], and produced the [[TENEX]] [[operating system]] for the PDP-10, to support its other computer research.
  2 KB (319 words) - 20:42, 18 March 2024
• PDP-7 UNIX
  ...mpson]] was able to find a little-used PDP-7 with a [[Graphic II]] display system to work on, and it was on this machine that UNIX (albeit in a very primitiv ...ctories]]) from the actual storage of data (in [[file]]s); the [[UNIX file system]] was the first to completely separate these two. It was also used to suppo
  2 KB (368 words) - 03:31, 8 March 2023
• Space Travel
  ...ll-labs.com/usr/dmr/www/spacetravel.html Space Travel: Exploring the solar system and the PDP-7]
  465 bytes (69 words) - 10:25, 24 August 2021
• DMV11 Synchronous Controller
  ...]], at [[baud rate]]s up to 56K bits/second (depending on [[software]] and system configuration), and supported both point-point and multi-point operation.
  4 KB (508 words) - 03:39, 16 February 2023
• CLU
  ...ent was the Dynamic Modeling [[PDP-10]] running [[Incompatible Timesharing System|ITS]]. Initial work was done using [[MACLISP]], but it was moved over to t ...rt of the CLU group for many years prior to the creation of the [[X Window System]]. CLU was one of the first programming languages to get support for X, in
  2 KB (249 words) - 11:53, 21 March 2024
• PLATO
  '''PLATO''' was a very early, innovative computer-based learning system developed at the University of Illinois; it ran on [[mainframe]]s, driving ...ny other early system had similar features, e.g. [[Compatible Time-Sharing System|CTSS]] had email. While PLATO did not directly influence the early [[ARPANE
  1 KB (222 words) - 23:40, 10 January 2024
• VAXstation 100
  ...dow]]ing system running on [[BSD|Berkeley Unix]]. Initially the [[W window system]] was used, but Bob Scheifler largely re-wrote it to become X. * The X Window System supports the VAXstation 100 from the initial version, to X10R4.
  4 KB (614 words) - 15:53, 20 March 2024
• ML11 MOS Memory System
  The [[address]]es shown are based at 0776400 for the first ML11 in a system. The basic system consisted of a number of [[DEC card form factor|hex]] [[printed circuit boa
  5 KB (611 words) - 18:24, 14 August 2023
• MM11-W core memory
  ...'MM11-W''' was a fairly rare 64 Kbyte [[core memory|core]] [[main memory]] system for the later [[PDP-11]] [[UNIBUS]] machines (it was a standard option on t ...board set of the MM11-W (less the M8294) is also used in the [[MJ11 memory system]], and (with the 19-bit wide H224-B variant of the core stack) in the [[MH1
  4 KB (655 words) - 20:02, 30 July 2023
• USG UNIX
  ...IX''' was one of three parallel variants of early [[UNIX]] inside the Bell System, along with [[CB-UNIX]] and [[PWB/UNIX]]; it was intended for general use, ...venth Edition]] from the Research group, were eventually unified as [[UNIX System III]], in June, 1980.
  1 KB (183 words) - 04:52, 29 December 2022
• CB-UNIX
  ...m, along with [[USG UNIX]] and [[PWB/UNIX]]. It came out of the Operations System Group (OSG) in Columbus, Ohio. ...as initially based on an early [[C programming language|C]] version of the system (possibly [[UNIX Version 5]] or [[UNIX Version 6]]). CB-UNIX had changes an
  3 KB (489 words) - 01:31, 30 December 2022
• BCC 500
  ...ur are each responsible for implementing their own part of the [[operating system]]; part in microcode and part in macrocode. ...lett-Packard|HP]]2100A at Hawaii. A [[PDP-11/10]] running [[ELF operating system|ELF]] connected to the [[ARPANET]].
  2 KB (319 words) - 17:44, 29 April 2024
• ANTS terminal system
  ...anced [[Terminal Interface Processor|TIP]]. It was written in the PEESPOL system programming language. A simple [[multi-tasking]] [[operating system]] oversaw the operation of the system; it also provided allocation of [[main memory]].
  2 KB (283 words) - 03:12, 30 June 2022
• ELF operating system
  '''ELF''' was a [[real-time]] [[multi-tasking|multi-programming]] [[operating system]] for the [[PDP-11]] (hence the name - 'elf' is German for 'eleven); genera * [[ANTS terminal system]]
  3 KB (461 words) - 16:23, 14 October 2022
• Terminal Interface Processor
  * [[ANTS terminal system]]
  2 KB (262 words) - 20:25, 17 December 2023
• RISOS/ARPA Terminal System
  ...Charles Landau, had previously worked on [[MIT]]'s [[PDP-1-X Time Sharing System]]. RATS also shows some influence from [[Multics]].
  516 bytes (68 words) - 12:08, 8 November 2021
• 1822 interface
  ...a [[synchronous serial line]] through a [[modem]], exactly the same as the system which the IMPs use to talk to each other, allowing a host to be many miles
  2 KB (369 words) - 21:49, 28 June 2022
• Port Expander
  The Port Expander software ran on the [[MOS operating system]], also done by SRI. There were two generations of Port Expander software;
  6 KB (1,100 words) - 06:47, 23 January 2024
• Terminal Interface Unit
  The TIU was written in [[MACRO-11]], and ran on the [[MOS operating system‎]] (created at the time of the TIU work). The code and documentation have * [[ANTS terminal system]]
  2 KB (371 words) - 18:44, 21 October 2022
• Packet Radio Network
  ..., the 'station' (in the prototype, a [[PDP-11/40]] running [[ELF operating system|ELF]], connected to a PRU), which is responsible for overall monitoring and ...Network Protocols] - from 1987, describes a relatively late version of the system
  4 KB (557 words) - 20:49, 29 January 2024
• MM8-E Memory System
  ...was [[core memory]]. The MM8-E was the first [[PDP-8 family]] core memory system to use the [[core memory#Technical details|shared sense/inhibit line]] tech
  3 KB (446 words) - 15:57, 11 May 2023
• UNIBUS Device Addresses
  | 777760-2 || System size (11/70) | 777764 || System I/D (11/70)
  7 KB (927 words) - 11:26, 12 November 2021
• DL11-W serial line unit/real-time clock option
  ...s provided in the standard [[DEC power distribution connectors]]) from the system's [[power supply]] must be provided to the selected slot.
  2 KB (346 words) - 04:00, 18 February 2023
• DR11-W Direct Memory Access Interface
  The [[address]]es shown are for the first DR11-W in a system; additional ones are normally set to be at 772430, 772450, 772470, etc.
  5 KB (746 words) - 17:48, 2 December 2021
• Datapoint 2200
  ...e so-called 'Version II' machine, released in early 1972. An [[interrupt]] system was made available for handling peripherals.
  5 KB (814 words) - 20:05, 4 June 2023
• DX11-B System 360/370 Channel to PDP-11 Unibus Interface
  ...r block multiplexer [[channel]]) on an [[IBM System/360|IBM 360]] or [[IBM System/370|370]] or compatible machine. On the PDP-11 side, [[Direct Memory Access ...itsavers.org/pdf/dec/unibus/DEC-11-HDXBA-B-D_DX11-B_Maint_Jul73.pdf DX11-B system 360/370 channel to PDP-11 unibus interface maintenance manual] (DEC-11-HDXB
  2 KB (305 words) - 16:23, 22 January 2024
• MA780 Multiport Memory Option
  ...conductor|MOS]] [[Dynamic RAM|DRAM]] [[multi-port memory]] [[main memory]] system for the [[VAX-11/780]]; it allowed creation of [[multi-processor]] systems [[File:Huge_4_VAX-11-780_MA780_System.png|thumb|right|400px|Huge system made up of four VAX-11/780's connected to an MA780 Multiport Memory]]
  3 KB (487 words) - 14:56, 15 May 2024
• KLESI Low-End Storage Interconnect
  ...Control Protocol|MSCP]] and TMSCP [[protocol]]s, running over a [[Low End System Interconnect]] physical interconnect, to interface with [[disk]]s and [[mag
  2 KB (244 words) - 20:58, 23 April 2024
• BA11-P card cage
  ...backplane]]s, and could contain up to roughly seven standard size (4-slot) system units (the documentation formally specifies six), although the backplane us
  1 KB (228 words) - 03:23, 11 July 2023
• DA11-F UNIBUS Window
  The first DA11-F in a system is usually assigned register addresses starting with 0764000 for the 'A' UN It consists of a 4-slot custom [[system unit]] [[backplane]], holding two pairs of two [[DEC card form factor|quad]
  3 KB (513 words) - 00:01, 14 January 2022
• JOSS
  ...on a [[PDP-6]]. There was a less successful JOSS III running on an [[IBM System/370]].
  820 bytes (112 words) - 07:45, 20 June 2023
• DA11-B DMA UNIBUS Link
  ...was built out of a pair of [[DR11-B parallel interface]]s, each taking a [[system unit]] [[backplane]] in each computer. An M7229 buffer module is installed The first DA11-B in a system is usually assigned register addresses starting with 0772410.
  2 KB (286 words) - 04:26, 30 August 2022
• KK11-B Cache Memory
  * [http://bitsavers.org/pdf/dec/pdp11/1144/1144_SystemTechMan.pdf PDP-11/44 System Technical Manual] - the KK11-B is covered in Section 6-12 (pp. 242-258 of t
  3 KB (501 words) - 16:27, 6 February 2024
• MERT operating system
  ...ing an organizational concept that later became known as a [[microkernel]] system; it was one of the very earliest successful ones. ...; it was a major step down the road to microkernels. MERT was an operating system which was divided up into several semi-independent components, all of which
  5 KB (736 words) - 21:56, 29 September 2022
• Michigan Algorithm Decoder
  ...moved to the [[IBM 7094]], and was much used on [[Compatible Time-Sharing System|CTSS]].
  545 bytes (76 words) - 16:11, 16 February 2022
• UNIBUS and QBUS termination
  ...away without it in small configurations. Whether it's needed on particular system is hard to predict, theoretically; the easiest thing is to just try it and The QBUS uses a somewhat complex termination scheme, particularly in system which contain multiple [[backplane]]s. (By the time [[Digital Equipment Cor
  7 KB (1,202 words) - 14:32, 28 November 2023
• KDJ11-D CPU
  ...-edge.com/micropdp11-volume1_system_cpus-EK-246AA-MG-001.pdf KDJ11-D/S CPU System Maintenance] (EK-246AA-MG-001)
  3 KB (529 words) - 12:01, 15 August 2022
• C Gateway
  It ran under the [[MOS operating system]], and was written in [[C programming language|C]] (hence the name - it was
  2 KB (288 words) - 06:58, 25 March 2022
• INTERLISP
  INTERLISP was ported to the [[IBM]] [[IBM System/370|System/370]], [[CDC]] 3300, [[Burroughs B6700]], [[BBN Jericho workstation|Jericho
  2 KB (284 words) - 08:47, 14 January 2024
• BBN LISP
  ...'''. This version was a timeshared LISP without an underlying [[operating system]], and implemented a software scheme for [[virtual memory]]. ...ed a paging device of their own making and essentially ported the Berkeley system, resulting in [[TENEX]].
  2 KB (236 words) - 18:28, 17 December 2023
• M8264 No-SACK Timeout Module
  ...terminator]], without SACK turnaround, an unused grant could also hang the system; but switching to an M9302 would be easier than an M8264.)
  4 KB (740 words) - 16:41, 20 April 2022
• M7259 Parity Control Module
  ...11-U_UP_Memory_System_Engineering_Drawings_RevF_Jan76.pdf MF11-U/UP memory system engineering drawings] - the M7259 is covered on pp. 7-40 of the PDF
  4 KB (621 words) - 22:21, 6 July 2022
• DUMPER tape format
  ...he EXEC facility. This was later moved inside the [[TOPS-20]] [[operating system|monitor]].)
  5 KB (703 words) - 12:29, 27 April 2022
• Record
  Older [[operating system]]s often supported 'record-structured' [[input/output|I/O]] (as opposed to
  536 bytes (80 words) - 01:27, 19 April 2022
• Tymshare Base-Host Protocol
  | System is answering. | System is up but shut.
  5 KB (698 words) - 08:26, 10 June 2023
• TENEX file system layout
  ...of 512-[[word]] pages, just like [[Virtual memory|memory]]. In the [[file system]], a page is specified by a linear disk [[address]]. ...ectories]]''. The data for all directories are inside a long file called <SYSTEM>DIRECTORY. Each directory is associated with a ''directory number'', which
  4 KB (640 words) - 07:50, 20 January 2024
• THE VAXORCIST
  USER: Any idea when the system will be up? goes alright, the system should be up first thing tomorrow morning.
  15 KB (2,569 words) - 08:21, 20 May 2022
• Installing VMS V1.0 on SIMH
  === vax780.ini for a typical small 16-user VAX-11/780 system === Use the following vax780.ini file for a typical small 16-user VAX-11/780 system.
  14 KB (1,788 words) - 03:29, 13 December 2022
• Customizing VMS V1.0
  | '''PAR''' || '''SYSGEN''' system paramter file ...modify a file and do not specify a version number for the output file, the system saves the original version for backup and increments the version number by
  22 KB (3,202 words) - 23:17, 5 September 2022
• KA750 CPU
  [[Image:VAX750block.jpg|right|thumb|300px|VAX-11/750 system block diagram, showing the major KA750 functional units]]
  3 KB (519 words) - 03:33, 18 May 2024
• UNIX Fourth Edition
  ...al file'), which left it in the form it retained until the [[BSD Fast File System]]. ...yet been implemented, making this kernel not fully functional even on a V3 system.
  2 KB (348 words) - 03:45, 18 July 2023
• UNIX Third Edition
  ...one in [[UNIX Second Edition]]; i.e. almost identical to the [[UNIX file system|V6 one]]: the only major differences from the latter being that i) the free ** [https://minnie.tuhs.org/cgi-bin/utree.pl?file=V3/man/man5/fs.5 File system]
  4 KB (674 words) - 03:58, 20 October 2023
• UNIX Second Edition
  ...ion|KS11]]. Some of the -11/20's running V2 UNIX had a KS11 - "the current system, which has relocation and protection hardware". ([http://squoze.net/UNIX/v2 The [[file system]] is almost identical to the [[UNIX file system|V6 one]]; the only major differences are that i) the free blocks are stored
  5 KB (926 words) - 03:54, 20 October 2023
• Dennis Ritchie
  ** [https://www.bell-labs.com/usr/dmr/www/cacm.html The Unix Time-sharing System] ([https://www.bell-labs.com/usr/dmr/www/cacm.pdf PDF]) - 1978 [[BSTJ]] ver ...bell-labs.com/usr/dmr/www/hist.html The Evolution of the Unix Time-sharing System] ([https://www.bell-labs.com/usr/dmr/www/hist.pdf PDF])
  2 KB (358 words) - 00:23, 23 March 2024
• VAX-11/750 & VAX-11/751 Revision Control
  ** 1.1 11/750 System Chart 11/750 system for purposes of identifying the compatible hardware,
  101 KB (10,182 words) - 14:04, 2 July 2022
• VAXcluster
  A VAXcluster configuration is a system that combines two or more VAX processors, and [[mass storage]] [[server]]s The VMS operating system uses a new system-level protocol to communicate among cluster nodes.
  13 KB (1,908 words) - 19:25, 27 April 2024
• CPU/Memory Interconnect
  [[Image:VAX750block.jpg|right|thumb|300px|VAX-11/750 system block diagram, showing how the CMI ties together the major /750 functional ...]], as well as [[input/output|I/O]] adapters) in the [[VAX-11/750]]. A sub-system connected to the CMI is referred to as a 'nexus'.
  3 KB (406 words) - 20:36, 18 May 2024
• Installing VMS V2.0 on SIMH
  === vax750.ini for a typical medium 16-user VAX-11/750 system === Use the following vax750.ini file for a typical medium 16-user VAX-11/750 system (order no.: SV-BXTAA).
  11 KB (1,541 words) - 10:00, 17 February 2024
• Installing, Configuring, and Testing DECnet V1.3 on VMS V2.0
  Boot VMS V2.0 and log in as SYSTEM. be present in the console drive. Therefore, the system may
  15 KB (1,849 words) - 16:06, 20 September 2022
• NCP DECnet/VAX V1.3
  ** '''RUN SYS$SYSTEM:NCP''' (the VMS-way) NODE=VAX1(2),SYSTEM=VAX/VMS Version V2.0
  28 KB (3,686 words) - 19:40, 16 November 2023
• Network Control Program (ARPANET)
  ! Operating System | [[Incompatible Timesharing System|ITS]]
  2 KB (275 words) - 22:35, 8 August 2023
• VAX Bus Interconnect
  * [[KLESI Low-End Storage Interconnect|KLESI-B Adapter]] - [[Low End System Interconnect|LESI]] controller ...ec/vax/vaxbi/EK-VBISY-RM-003_VAXBI_System_Reference_Manual_Feb89.pdf VAXBI System Reference Manual] (EK-VBISY-RM-003)
  4 KB (536 words) - 20:40, 23 May 2024
• Network Control Program (DECnet)
  Every operating system has got its own NCP variant, but most of the commands are identical.
  3 KB (454 words) - 18:17, 29 September 2023
• Computer Interconnect
  ...hort-range [[local area network|LAN]]; it was the first element of DEC's [[System Communication Architecture]] to be implemented. ...ll running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approa
  3 KB (446 words) - 00:41, 24 May 2024
• VAX-11/730 Revision Control
  There are two variations of the 11/730 system - 11/730 RL02/R80 3.1 VAX 11/730 SYSTEM IDENTIFICATION REGISTER (SID)
  38 KB (3,857 words) - 14:02, 2 July 2022
• BA23 Enclosure
  ...ove were also available in the BA123 enclosure, or in the [[H9642]] Medium System Cabinet. The H9642 Medium System Cabinet contains two BA23 enclosures, one 'Standard' BA23-A, and one 'Expan
  6 KB (928 words) - 21:57, 19 August 2023
• KA650 Revision Control
  | MICROVAX KA650 COMPATIBILITY SYSTEM REVISION MATRIX | | ...--------------------------------------------------- | SYSTEM VARIATIONS |
  135 KB (5,037 words) - 14:06, 2 July 2022
• VAXserver 3500/3600
  ...nly for [[input/output|I/O]]; [[main memory]] used the [[KA650 Main Memory System]], using a special [[bus]] carried on [[over the back]] connectors as well
  2 KB (278 words) - 15:57, 23 May 2024
• VAXft series
  ...nd at least one [[main memory]] card, each zone had at least one [[KFE52]] system I/O controller; the KFE52 provided a [[Digital Storage Systems Interconnect ...ft's fault tolerance features are implemented in [[software]], the [[VAXft System Services]] software, which is needed to support those features.
  2 KB (307 words) - 08:39, 13 May 2024
• VAXELN
  '''VAXELN''' is a [[real-time]] [[operating system]] for the [[VAX]]. In the design of VAXELN, a [[real-time]] application is any in which the system's response to external events is critical.
  2 KB (349 words) - 22:22, 28 June 2022
• Installing MicroVMS V4.6 on SIMH
  The MicroVAX II system used here consists of: Use the following microvax2.ini file for a MicroVAX II system.
  65 KB (7,949 words) - 21:58, 19 August 2023
• Installing Ultrix V1.1 on SIMH
  * Ultrix V1.1 Mini System * Ultrix V1.1 Full System
  36 KB (4,892 words) - 18:40, 3 July 2022
• Ken Thompson
  * [https://www.bell-labs.com/usr/dmr/www/cacm.html The Unix Time-sharing System] ([https://www.bell-labs.com/usr/dmr/www/cacm.pdf PDF]) - 1978 [[BSTJ]] ver
  2 KB (256 words) - 00:13, 23 March 2024
• Bit stuffing
  ...ta, and prevent them from interfering with the proper operation of the sub-system. Instances of that pattern in the user's data are concealed by inserting an
  992 bytes (155 words) - 15:15, 27 June 2022
• Bell Laboratories
  ...ut its primary purpose was to develop telecommunications gear for the Bell system. ...Bell subsidiary which actually manufactured all the hardware for the Bell system) and AT&T were unified in New York City. Bell Labs as an independent compan
  2 KB (306 words) - 23:10, 7 December 2023
• Bell System Technical Journal
  ...tion series where the results of research and development done by the Bell system (including at [[Bell Laboratories]]) on "scientific and engineering aspects
  499 bytes (61 words) - 01:30, 30 June 2022
• Subroutine call
  ...on systems which interpolate a [[data network]] between components of the system, there are [[protocol]]s which implement '''remote procedure calls'''.
  463 bytes (63 words) - 18:41, 6 February 2023
• List
  ...l indicate the next one - an example is the 'free list' in the [[UNIX file system]].
  543 bytes (91 words) - 05:18, 15 May 2023
• VAX-11/785 Revision Control
  2.0 SYSTEM ID REGISTER............................... 3 the 11/785 system and options. Revision levels are tracked according to
  118 KB (7,116 words) - 14:05, 2 July 2022
• VAX-11/780 & VAX-11/782 Revision Control
  2.1 System ID Register 2.2 11780 System Revision
  70 KB (7,782 words) - 14:04, 2 July 2022
• Advanced Installation of Ultrix V2.0 on SIMH
  * Full System * Partitions on two System Disks
  73 KB (9,059 words) - 20:56, 22 May 2023
• M930 UNIBUS terminator
  ...rg/pdf/dec/pdp11/1145/1145_System_Engineering_Drawings_Jun74.pdf PDP-11/45 system engineering drawings] - the M930 (first version) is covered on pg. 112 of t
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• ULTRIX Remote Installation Service
  ...] Remote Installation Service (RIS) allows to install the ULTRIX operating system and the ULTRIX Workstation Software over the network. The system manager uses the remote installation service ('''ris''') utility to transfe
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• ULTRIX Diskless Mangement Services
  DMS is useful for those client systems that do not have their own system disks.
  1 KB (225 words) - 09:33, 8 July 2022
• Setting Up RIS on ULTRIX V2.0
  In the [[Advanced Installation of Ultrix V2.0 on SIMH#Boot the Miniroot System on the VAX-11/785|Miniroot boot section]] of the Advanced Installation you You will be asked a series of questions about your system.
  32 KB (4,724 words) - 22:56, 7 July 2022
• Nimrod
  ...hat would also scale indefinitely as the Internet grew (like [[Domain Name System|DNS]] does). Nimrod's main focus was really on i) providing a path-selection system which allowed things like letting users have more input to selecting the pa
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• KA730 CPU
  ...AX-11_730_Memory_System_Technical_Description_198205.pdf VAX-11/730 Memory System Technical Description] (EK-MX730-TD-001)
  2 KB (234 words) - 00:54, 6 July 2022
• Installing and Configuring an ULTRIX V3.0 DMS Server on a SIMH MicroVAX 3900
  Performing normal system tests. Ultrix-32 V3.0 (Rev 64) System #3: Tue Nov 15 14:20:57 EST 1988
  80 KB (9,795 words) - 09:39, 10 July 2022
• Digital Storage Systems Interconnect
  ...n alternate physical layer in the [[Computer Interconnect]] system; the CI system had a 'native' physical layer before the creation of DSSI. (DSSI is also an A description of the DSSI from the 'Digital's Storage System Interconnect' protocol specification document:
  10 KB (1,247 words) - 21:30, 2 December 2023
• Extended Memory Interconnect
  ...ssor System Block Diagram.png|thumb|400px|rightt|A four-processor VAX 6200 system built around an XMI bus]] ...ial capabilities to support the shared access to memory required by such a system.
  3 KB (491 words) - 01:43, 8 May 2024
• DEC acronyms
  | [[Common File System]] ([[PDP-10]]/[[TOPS-20]]) | Local Area System Transport
  3 KB (414 words) - 21:41, 29 April 2024
• Booting a real MicroVAX 2000 from an ULTRIX V3.0 DMS Server on a SIMH MicroVAX 3900
  * ? E => System clock (has no battery) | E || System clock
  5 KB (679 words) - 11:45, 18 July 2022
• Installing, Configuring, and Testing A VMS V4.7 Local Area VAXcluster on SIMH
  Its system disk contains the cluster common files for startup, authorization, and queu In a Local Area VAXcluster configuration, a boot node may be any VAX system except [[VAX-11/725]] or [[VAX-11/730]], or it may be one of the following
  112 KB (13,727 words) - 18:09, 30 January 2024
• DESVA VAXstation 2000 / MicroVAX 2000 ThinWire Ethernet Option
  ...odule enables the connection of a [[VAXstation 2000]] or [[MicroVAX 2000]] system to an [[Ethernet]] network via a [[ThinWire]] connection using [[RG-58]] co ...ption connectors (J5 and J14) on the [[KA410 MicroVAX 2000/VAXstation 2000 System Module]].
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• MS400 MicroVAX 2000/VAXstation 2000 Memory Module
  ...memory module may be connected to a [[KA410 MicroVAX 2000/VAXstation 2000 System Module]]. The KA410-AA system module generates byte parity when writing to RAM memory and checks byte par
  1 KB (202 words) - 11:27, 14 August 2022
• BA40A Expansion Adapter
  ...] system unit that permits communication between the expansion box and the system unit. ...ng rectangular openings at the bottom of the MicroVAX 2000/VAXstation 2000 system unit and at the top of the Expansion Adapter.
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• KA410 MicroVAX 2000/VAXstation 2000 System Module
  There are two versions of the KA410 [[MicroVAX 2000]]/[[VAXstation 2000]] System Module: ...tem module is central to the entire MicroVAX 2000/VAXstation 2000 computer system.
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• DHT32 Asynchronous Serial Line Option
  ...additional terminals or peripheral devices to connect to the MicroVAX 2000 system. ...00, a total of 12 asynchronous lines can be connected to the MicroVAX 2000 system.
  3 KB (446 words) - 20:41, 16 August 2022
• DSA Standard Disk Format
  ...4487.pdf United States Patent 4,434,487 "Disk format for secondary storage system"].
  3 KB (449 words) - 23:42, 26 March 2023
• Standard Disk Interconnect
  * ''Digital Large System Mass Storage Handbook'', 1986 - Chapter 7, The Storage Interconnect
  4 KB (512 words) - 15:29, 29 December 2023
• Hierarchical Storage Controller
  ...created by [[Digital Equipment Corporation|DEC]] for use in [[VAXcluster]] system. They were connected to the [[VAX]] systems in the VAXcluster over [[Comput * [[Small Computer System Interface|SCSI]] data channel (optional on HSC70 and later models)
  3 KB (489 words) - 16:58, 22 April 2024
• HSC50 Hierarchical Storage Controller
  ...Corporation|DEC]]'s documentation) is an intelligent [[mass storage]] sub-system [[server]]. It communicates over the [[Computer Interconnect]] (CI), and is ...tocol]] (MSCP) is a communication protocol used over the CI between a host system and the HSC50. This protocol enables a single class driver to replace multi
  9 KB (1,370 words) - 23:47, 28 December 2023
• VSV11 Graphic System
  ...used [[Direct Memory Access|DMA]] to retrieve the display program from the system's main memory, and converted it to a [[bit-mapped display]]-type image stor ...mory Data Bus, covered in Section 4.3.3 of the 'VSV11/VS11 Raster Graphics System Option Description'). They also plugged into a standard [[QBUS backplanes|Q
  3 KB (390 words) - 12:39, 27 February 2024
• DW11 UNIBUS-to-LSI-11 Bus Converter
  The '''DW11 UNIBUS-to-LSI-11 Bus Converter''' is a sub-system which allows the connection of a [[UNIBUS]] to a [[QBUS]]. Normal master/sl
  1 KB (232 words) - 02:50, 31 August 2022
• Unix dump/restore tape format
  ...can be a [[header]], or data. Header blocks hold metadata and [[UNIX file system|inode]] information. ...inodes written to tape is the entire directory structure of the whole file system, and file inodes make up the rest of the volumes.
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• Installing SITS on SIMH
  ...[[DDT]]-like memory resident [[debugger]], like [[Incompatible Timesharing System|ITS]]' non-[[time-sharing]] DDT. It can also handle a variety of media for * SALV is the disk salvager, same as in [[Incompatible Timesharing System|ITS]].
  6 KB (1,016 words) - 07:25, 8 September 2023
• PDP-10 Memory Bus
  ...dp10/KL10/EK-1080U-SD-003_1080_1090_SysDescr_Jan77.pdf decsystem-1080/1090 System Description] (EK-1080U-SD-003) - the SBus is covered on pp. 68-70 of the PD
  3 KB (409 words) - 13:38, 12 November 2023
• List of SITS system calls
  ...ystem calls were done using EMT in older versions, and TRAP in newer. The system call number makes up the lower 7 bits. Bit 200 can be set to have the call System call inputs are popped off the stack, and outputs are pushed. On error, th
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• VDH/11 Very Distant Host Controller
  ...blob/master/files/kdvdh.m11%5Blep%2Cjrl%5D168 KDVDH.M11] - [[ELF operating system|ELF]] VDH/11 device driver ** [https://github.com/pdp11/elf-operating-system/blob/master/files/ktbl.sml%5Blep%2Cjrl%5D168 KTBL.SML] - associated header
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• TCP and IP bake offs
  * [[OS/360|OS/MVT]] for the [[IBM System/360|IBM 360]] from [[UCLA]]
  2 KB (300 words) - 02:30, 2 April 2024
• SITS file system
  This is a partial description of the [[SITS]] [[file system]] [[disk]] format. It should be good enough for reading data, but not writ ...|RK05]] [[disk pack]] is viewed as 2436 blocks of 1024 bytes. In the file system, block addresses are linear.
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• SITS tutorial
  If the system doesn't have any users, type enter to bypass login and go to the SYSSPR # p ==System Sphere==
  2 KB (275 words) - 08:16, 3 November 2022
• CD11 High-Speed Punched Card Reader Control Unit
  ...a number of smaller [[FLIP CHIP]]s which were installed in custom 4-slot [[system unit]] [[backplane]]. The modules are:
  4 KB (563 words) - 01:45, 3 November 2022
• Berkeley Computer Corporation
  ...re for creating the [[Berkeley Time-Sharing System|BTSS]] [[time-sharing]] system, running on a modified [[Scientific Data Systems|SDS]] [[SDS 930|930]] (eve
  1 KB (163 words) - 19:18, 10 June 2023
• UNIBUS priority plug
  As part of the configuration of a device being added to a system, it was necessary to ensure that a priority plug for the desired priority l
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• MX15-A Memory Bus Multiplexer
  The '''MX15-A Memory Bus Multiplexer''' is a [[PDP-15]] sub-system which has three [[memory bus]] input ports, and one output port, which can
  972 bytes (161 words) - 16:49, 1 December 2022
• UNIX Support Group
  ...a small team to support UNIX for use within Bell Labs, something that the system's creators in the Research group were not really in a position to do. The U ...hem by then based on Research's [[Unix Seventh Edition]]) to create [[UNIX System III]].
  807 bytes (129 words) - 04:41, 29 December 2022
• GE-635
  ...mory]] to the [[IBM System/360|System 360]]). The [[Dartmouth Time Sharing System]], where [[BASIC]] was developed, also ran on the GE-635. ...w.bitsavers.org/pdf/ge/GE-6xx/CPB-371A_GE-635_System_Man_196407.pdf GE-635 System Manual]
  2 KB (338 words) - 12:50, 5 January 2023
• GE-645
  ...dd necessary features, such as [[virtual memory]], to the [[IBM System/360|System 360]]. ...itsavers.org/pdf/ge/GE-645/LSB0468_GE-645_System_Manual_Jan1968.pdf GE-645 System Manual]
  4 KB (588 words) - 18:00, 12 January 2024
• CP operating system
  ...ne]] [[operating system]]; it was the ancestor of the later [[VM operating system]]. It was created at [[International Business Machines|IBM]]'s Cambridge Sc ...jones/proj/vm_reading/ibmrd2505M.pdf The Origin of the VM/370 Time-sharing System] - covers its origins in CP
  1 KB (177 words) - 23:47, 29 July 2023
• General Electric
  ...(this may contain an error; on pg. 37, footnote 29 says "the second [DTSS] system was implemented on the GE 645" - this is probably wrong, a 645 would be ext
  4 KB (669 words) - 20:53, 12 January 2024
• SUN workstation
  ...form a personal computer system for standalone or network use. The entire system has been nick-named SUN (an acronym for Stanford University Network, but al ...has been designed to support a [[multi-tasking|multitasking]] [[operating system]] such as [[Bell Laboratories|Bell Lab]]'s [[UNIX]]."
  2 KB (343 words) - 16:12, 29 January 2023
• Sun-1
  ...rs.org/pdf/sun/sun1/800-0345_Sun-1_System_Reference_Manual_Jul82.pdf SUN-l System Reference Manual]
  2 KB (286 words) - 06:22, 29 January 2023
• X Window System
  ...images). Unlike earlier window systems, which were part of an [[operating system]], or interacted though [[subroutine call]]s, X is based on a [[protocol]] * [https://dl.acm.org/doi/pdf/10.1145/22949.24053 The X Window System], Robert W. Scheifler, Jim Gettys (ACM Transactions on Graphics 5 (2), Apri
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• VAXstation 100 firmware notes
  This icon is displayed when a user can be logged into the system.<br>
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• FCO CIBCI-I002
  |EQ Kit Variation System/Option Applic: N/A | NOTE: If all nodes in the VAXcluster system have 10 tick capability
  31 KB (2,729 words) - 09:22, 27 February 2023
• FCO CIBCI-I003
  | APPLICABILITY: When installing a 9XXX or 65XX system with a CIXCD or when | NOTE: If all nodes in the VAXcluster system have 10 tick capability
  29 KB (2,531 words) - 09:23, 27 February 2023
• Repairing early UNIX file systems
  ...sions of [[UNIX]] had almost no tools for automagically fixing [[UNIX file system]] corruption. To do it, one needed to: * understand how the file system is arranged (see the link below, but it's pretty simple);
  10 KB (1,838 words) - 21:43, 12 June 2023
• MicroVMS
  * Simplification of System Management
  2 KB (337 words) - 18:00, 13 January 2024
• The VMS-MicroVMS Merge
  ...users rarely had much computer expertise, never had a computer room with a system manager and operator, and rarely knew anyone experienced in VAX/VMS to whom ...d by system managers and operators; now, the user would have to be his own system manager, operator and maintainer.
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• Local Area VAXcluster
  ...oth a management center for the cluster and a major resource provider. Its system disk contains the cluster common files for startup, authorization, and queu * The '''satellite nodes''' are booted remotely from a boot node's system disk. Generally, these nodes are consumers of cluster resources, though the
  2 KB (360 words) - 14:32, 13 August 2023
• VAXserver
  ...AXservers instead of multi-user VAXes, since the costs for the [[operating system]] licenses were much lower.
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• TREK7
  I added another source of randomness (the actual system time in hundredth of a second since last midnight, see: <code>TREKA.FOR</co OPERATING SYSTEM CAUSED A FEW ALTERATIONS. CHANGES, ADDITIONS,
  64 KB (10,642 words) - 19:18, 1 February 2024
• VAX 10000 series
  ...1 to 4, depending on the number of [[Central Processing Unit|CPUs]] in the system. ...cs.org/collections/mds-199909/cd1/vax/1000bop2.pdf DEC 10000 AXP VAX 10000 System Operations Manual] (EK-1000B-OP.002)
  2 KB (214 words) - 15:28, 23 May 2024
• Laser System Bus
  The '''Laser System Bus''' (usually given as the acronym: '''LSB''') was a [[bus]] introduced w ...ial capabilities to support the shared access to memory required by such a system, including support for [[cache coherency]].
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• MULTI-TREK
  it should run under any system with shared global areas and SYS$SYSTEM, and installs MTREK.EXE with DETACH and ACNT
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• SIMH Simple Sound System
  Sorry, Windows folks, as of now the '''SIMH Simple Sound System''' is limited to a Linux environment. ...ve/folders/1sNwJA7I8eDjFhUlxlaXmiYBVWWnv417I?usp=sharing SIMH Simple Sound System Kit]'''):
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• Trs80gp setup
  ...First, when you select a system it automatically loads a default operating system. These are built in and to save changes to these default images you either ...that once you tweak your configuration that you use the command line. For system selection you use options such as -m1 for Model I, -m2 for Model II, etc. M
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• Yggdrasil Linux
  ...amed after Norse mythology's world tree, aimed to provide a complete Linux system on a single CD. ...pal components: the Linux kernel, the GNU software suite, and the X window system.
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• Installing TRSDOS-II 4.4 onto a Model II or 12 System With a Hard Drive
  Download trs80gp and extract the correct version for your operating system. ...ystem with the command line, script, or batch file; it will remember which system you chose.
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• TRS-80 Model I Family
  | operating system = Level I Basic, Level II Basic, [[TRSDOS]], Third Party DOSes includin ...[floppy disk]] drives and up to 48k RAM in groups of 16k assuming the base system had 16k installed. It also allowed a [[printer]] to be attached. Without th
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• Tandy 1000 Series
  ...rundown of the other models in the series. Although the 2000 was an MS-DOS system it was not fully compatible due to incompatible hardware and the use of the ...ea. Instead of following companies such as [[Compaq]], what if they made a system that had superior sound and graphics to the average compatible? So, they de
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• VAX 85xx, 87xx, and 88xx systems
  ...helped to correct design bugs early. ECL technology and a two-phase clock system achieve a 45-nanosecond cycle time. [[Microcode|Micro instructions]] are pr * System Busses
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• VAX 8500/8530/8550 Revision Control
  | 1-10 System ID Register................................... 12... | 1-11 Hierarchy, 85XX/855X SYSTEM.......................... 13 |
  233 KB (10,381 words) - 20:20, 22 May 2023
• VAX 8700/8810 VAX 8800/8820N Revision Control
  | 1-4 System ID Register................................... 12... | 2-1 VAX 8700 System...................................... 15...
  239 KB (10,046 words) - 20:25, 22 May 2023
• VAX 8820/8830/8840 Revision Control
  _ K-RM-885BA-Y-0 Rev B, VAX 8820/8830/8840 System, Sep 1990 | 1-9 System ID Register................................... 11...
  170 KB (7,189 words) - 20:26, 22 May 2023
• Tandy 1000 S-Series
  | operating system = [[MS-DOS]] 3.2, [[Deskmate]] II | operating system = [[MS-DOS]] 3.3, [[Deskmate]] 3
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• Tandy 1000 EX and HX
  ...compactness of this system is you could not stack a monitor on top of the system with using a special shelf that Radio Shack sold separately. This shelf was
  4 KB (733 words) - 08:36, 23 May 2023
• VSV21 Graphic System
  The '''VSV21 Graphic System''' is a single-module [[DEC card form factor|quad]] size option for the [[Q The VSV21 has got [[operating system]] support from:
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• SUPDUP
  ...not all; e.g. ^Z is still trapped by the operating system. Using special system calls, a file channel can be set to ''super image mode'' in which '''all'''
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• Running ITS (the Incompatible Timesharing System) on the KL-10
  <div style="text-align:center;">Running ITS (the Incompatible Timesharing System) on the KL-10</div> ...to allow us to run our [[time-sharing]] system [[Incompatible Timesharing System|ITS]]. We propose to implement this ITS [[Virtual memory#Implementation|pag
  23 KB (3,961 words) - 17:58, 5 January 2024
• Stanford Time-Sharing System
  '''Stanford Time-Sharing System''' was the formal name for a series of experimental [[time-sharing]] system The system had twelve Philco vector displays.
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• TVEDIT
  [[Image:Zeus_TVEDIT.png|thumb|right|TVEDIT running on the Zeus system.]] ...editor. It was written by Brian Tolliver for the [[Stanford Time-Sharing System|Odin and Zeus]] [[time-sharing]] systems on the Stanford [[PDP-1]].
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• IMSSS
  ...They ran the experimental [[time-sharing]] systems [[Stanford Time-Sharing System|Odin, Thor, and Zeus]]. There was also Stanford Logo (SLOGO).
  959 bytes (137 words) - 10:17, 10 January 2024
• SUMEX-AIM
  ...'' computer for '''Artificial Intelligence in Medicine''' was a [[PDP-10]] system in operation from 1974 to 1992. It started out with one [[KI10]] processor
  828 bytes (106 words) - 10:23, 10 January 2024
• Tymshare
  ...n [[SDS 940]], on which they ran derivatives of the [[Berkeley Timesharing System]]. Later, Tymshare started [[TYMNET]]. ...itsavers.org/pdf/sri/arc/augment_engine/26KL_Brochure_Oct83.pdf Tymshare's System 26KL] - their PDP-10 clone
  977 bytes (136 words) - 17:45, 10 January 2024
• Project GENIE
  ...930]]. A later attempted system by a related group, the [[CAL Time-Sharing System]], did not succeed, nor did an attempted commercial spinoff, the [[Berkeley
  1 KB (171 words) - 19:49, 3 March 2024
• CAL Time-Sharing System
  ...y given as '''CAL-TSS''') was an unsuccessful [[time-sharing]] [[operating system]] for the [[CDC 6400]], written by a team at the Campus Computer Center at ...totype version of the system was running in July 1969. By October 1969 the system was self-supporting. The project was cancelled in November 1971, when fundi
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• WAITS on-disk file structure
  ...ootable RP06 track may be used, and the last two are invisible to the file system code. | 61 || Address of front-end file system
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• ODS2
  '''ODS2''' ('''On-Disk Structure-2''') is the standard [[VMS]] [[file system]]; it is one of the [[Files-11]] family.
  204 bytes (28 words) - 13:38, 13 June 2023
• FAIL
  ...rted to [[TOPS-10]], [[TENEX]]/[[TOPS-20]], and [[Incompatible Timesharing System|ITS]].
  790 bytes (111 words) - 13:08, 16 November 2023
• ITS on-disk file system layout
  Description of [[Incompatible Timesharing System|ITS]] [[file system]]'s on-disk data structures. ...not cross a cylinder boundary. '''NBLKS''' is a symbolic constant in the system which is the number of (usable) blocks on a disk pack.
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• Installing ULTRIX-11 V1.0 on SIMH
  == ULTRIX-11 System Installation == === Create File System ===
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• DEC Unique Product Identifier
  061 | CP/M-86/80 OPERATING SYSTEM 061 | VAX PACKETNET SYSTEM INTERFACE ACCESS
  15 KB (1,675 words) - 09:17, 25 June 2023
• KY11-D Programmer's Console
  ...pdf/dec/pdp11/1140/PDP-1140_System_Engr_Drawings_Rev_P_Jun74.pdf PDP-11/40 system engineering drawings] (pp. 161-165 of the PDF)
  2 KB (397 words) - 20:32, 30 June 2023
• John Lions
  ...on the Unix Operating System'', and its companion volume ''Unix Operating System Source Code, Level Six'' (although he did not himself write the content in
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• Installing and Configuring MicroVMS V4.0 on a MicroVAX I
  1,500$ for the MicroVMS Full System license The MicroVMS system is now executing the site-specific startup commands.
  53 KB (6,333 words) - 13:43, 19 July 2023
• RD51/52/53 Survival Tips
  formatting. The first thing to do is check the system error log. All system error log. If that code includes an octal 10 or hex 8, you
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• DN11 Automatic Calling Unit Interface
  A DNll requires a custom quad [[system unit]] backplane and support [[printed circuit board|boards]] (the ensemble * 70-08513 Wired System Unit ([[DEC part number]])
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• UNIX/370
  ...' was the name adopted by two separate efforts to run [[UNIX]] on an [[IBM System/370]] class machine. ...ased approach was successful, and Bell ran the result on a number of large System/370 machines.
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• CASINO
  ...ne-of-a-kind computer built out of [[Digital Equipment Corporation|DEC]] [[System Module]]s by Scientific Engineering Institute (which later became Medidata; ...ipment Corporation (DEC) had produced a specification for the PDP-3, a new system in their line of programmable data processor minicomputers. Ed Rawson took
  7 KB (1,205 words) - 15:22, 27 January 2024
• VAX Diagnostic Supervisor
  * '''Level 1''' diagnostic programs run under an operating system. They do not use the VAX/DS. (=> UETP) * '''level 5''' diagnostic programs run in [[Writable Control Store|WCS]] or system console, not in VAX main memory. They do not use the VAX/DS.
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• RQDX3 MFM Disk & Floppy QBUS Controller
  ...[[DMA]] grants from a second RX/RD controller or other DMA devices in the system. ...the drive select jumper in the disk drive and the number of drives in the system. The controller looks for disk drives in the following order of drive selec
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• PRO/VENIX
  ...o accommodate newer releases of AT&T UNIX. PRO/VENIX is the UNIX operating system of choice for the Professional because of its special features, such as gra ...m_Managers_Guide_1983.pdf PRO/VENIX for the Professional: Installation and System Manager's Guide]
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• Professional 300 Series
  The common system components are: * [[P/OS]] Professional 300 Operating System Software
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• Finger
  ...dom musings. The plan file was named differently across various operating system; arguably the most well known file name is the one for Unix: ''.plan''.
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• Host table
  * [[Domain Name System]]
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• Harris CX series
  Several [[operating system]]s were developed, CX/RT for [[real-time]] applications, CX/SX for security
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• Daemon
  ...cal Greek - 'semi-divine spirit'), originated on [[Compatible Time-Sharing System|CTSS]]; it has spread (e.g. to [[UNIX]]). There are now typically innumerab ...ted when the system boots, and remains running in the background until the system goes down.
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• Removable-pack disk
  So a system could have multiple packs (for backup purposes, or for infrequently needed
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• R80 Disk Drive
  It apparently had several options for how it connected to the system, and was identified differently depending on which one was used, as follows * an R80 connected to the system through a [[MASSBUS]] adapter (MBA) was denominated an [[RM80 Disk Drive|RM
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• HSD10 DSSI-to-SCSI Bus Adapter
  ...rmware command utility, you can set device parameters including node name, system ID, disk and tape allocation classes, and performance optimization paramete ...You can run the DUP utility from either the system console or from the VMS system prompt. Once a connection to the HSD10 array controller command utility is
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• RAID
  ...Papers/katz-2010.pdf RAID: A Personal Recollection of How Storage Became a System]
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• PDT-11 Intelligent Terminal Family
  ...apted subset of [[RT-11]], called "[[RT²/PDT]]" was used as the operating system.
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• PS/2 Model 60 Sales Brochure
  IBM Personal System/2 Model 60 IBM Personal System/2 Model 60 combines high performance with high capacity, making it an excel
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• RC25 disk drive
  .... It connected to the [[device controller]] via the DEC standard [[Low End System Interconnect]] [[bus]]; a second 'slave' drive can be connected to the firs
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• Infoserver series
  ...isk structure itself, allowing each host system to use its own native file system. Multiple on-disk structures can be served and accessed on a single InfoSer ...station 3100 series|VAXstation 3100]]) into an InfoServer by replacing the system [[read-only memory|ROMs]] with those of an InfoServer. You need two 27C1024
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• ITS Internals Manual
  ...high-level portions of a manual which describes how the [[kernel]] of the system is organized. * File system
  10 KB (1,580 words) - 14:00, 1 December 2023
• Xerox Graphics Printer
  The XGP was based on the Xerox LDX (Long Distance Xerography), a facsimile system which came out in 1964, and used a raster scan of the original document. Bo The one at MIT was connected to the [[Incompatible Timesharing System|ITS]] [[KA10]] MIT-AI via the [[Rubin 10-11 interface]], and it remained th
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• MIT UNIBUS XGP interface
  ...at it was an -11/20). That was connected to the [[Incompatible Timesharing System|ITS]] [[KA10]] MIT-AI via the [[Rubin 10-11 interface]]. ...phics System for Document Generation] - a fair amount of detail on the CMU system
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• VT36 Color Graphics Display Control System
  ...6 Color Graphics Display Control System''' is based on the [[VSV11 Graphic System]] enhanced by a dedicated [[PDP-11]] processor and a special high level Pic An intelligent, multiple display control system for PDP-11 and [[VAX]] computers.
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• List of Chaos application protocols
  ...n what's found on [[Incompatible Timesharing System|ITS]] and the [[CADR]] system software. * FILE &mdash; remote file system access; mainly for Lisp machines.
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• Augmentation Research Center
  ...] (usually referred to as 'NLS'), built around the [[Berkeley Time-Sharing System]], running on an [[SDS 940]]. The NLS was the centerpiece of the "[[Mother
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• Common File System
  [http://bitsavers.org/pdf/dec/pdp10/TOPS20/V7/MGR_GUIDE.MEM.txt TOPS-20 System Manager's Guide June 1990 TOPS-20 (KL Model B) Version 7.0] ...]] [[PDP-10]], [[DECSYSTEM-20]] computer running the [[TOPS-20]] operating system. CFS uses the [[HSC50 Hierarchical Storage Controller]] and the [[CI20 Comp
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• ITS 138
  Gerald Sussman has preserved a listing of [[Incompatible Timesharing System|ITS]] version 138, most likely from 1967. It was mentioned in Grant Fjerme | 19-23 || UUO handling; system calls and user calls.
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• Charles Babbage
  ...ch was a way of providing a high-level abstraction of a complex mechanical system. Now little-known, and understood, it was a key, and constantly improved, t
  7 KB (1,099 words) - 05:14, 9 April 2024
• Bell Telephone Laboratories relay computing devices
  ...expense, or attendant complexity. (Perhaps the very first case of [[Second System Syndrome]]?) ...''Telephone Switching and the Early Bell Laboratories Computers''], [[Bell System Technical Journal|BSTJ]] Vol. 42(2), 341, 1963 - the author was present at
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• IBM 1401
  * [http://www.bitsavers.org/pdf/ibm/1401/ IBM 1401 Data Processing System] - documentation at [[Bitsavers]] ...tsavers.org/pdf/ibm/1401/A24-1401-1_1401_System_Summary_Sep64.pdf IBM 1401 System Summary]
  3 KB (447 words) - 18:58, 5 January 2024
• Atanasoff-Berry Computer
  ...itous in the [[Dynamic RAM]] of all modern computers. This capacitor-based system was effectively the ABC's [[main memory]]. ...ver operated at full scale, for several reasons: its [[secondary storage]] system, used for holding intermediate results, was not yet reliable when WWII drew
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• Texas Instruments S1500
  ...nts S1500''' is a [[NuBus]] based [[minicomputer]] running [[UNIX System V|System V]]. It was announced by [[Texas Instruments]] in 1986. It used 32-bit pr
  802 bytes (103 words) - 18:53, 2 January 2024
• Computer
  ...erstand and [[debug]]), so it is probably not critical; indeed, [[embedded system]]s usually use [[read-only memory|ROM]] for their program storage. On the o
  3 KB (527 words) - 18:05, 24 February 2024
• ENIAC
  ...e]], as it cannot modify its own program. However, contemporary [[embedded system]]s often have a [[microprocessor]] with all their [[object code|code]] cont
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• Xv6
  * [http://pdos.csail.mit.edu/6.828/2006/index.html 6.828: Operating System Engineering] - the course
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• DX20 Programmed Device Adapter
  ...used to attach a [[Digital Equipment Corporation|DEC]] machine to a [[IBM System/370]] (appearing as a device to the /370); it was mainly intended to allow The DX20 was principally intended for use on a [[KL10]] system; it plugged into an [[RH20 MASSBUS controller]] on the KL10. (The DX20 will
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• Selective Sequence Electronic Calculator
  ...to IBM's first computer. It was thus a major step on the path to the [[IBM System/360]], which consolidated IBM's place as the world's largest computer compa
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• DX10 Data Channel
  ...used to attach a [[Digital Equipment Corporation|DEC]] machine to a [[IBM System/370]] (appearing as a device to the /370). --> They plugged into a pair of [[system unit]]-sized [[backplane]]s (a 4-slot and a 9-slot), mounted in a separate
  3 KB (492 words) - 20:33, 12 February 2024
• Standard Tape Interconnect
  * ''Digital Large System Mass Storage Handbook'', 1986 - Chapter 7, The Storage Interconnect
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• Versions of important ITS software
  ...us sources, about version numbers for prominent [[Incompatible Timesharing System|ITS]] and pre-ITS software. This includes references to version number and ...e "@ HACTRN" file which is clearly NTS DDT ported over to make timesharing system calls rather than direct IOT instructions. There is also the matter that H
  9 KB (1,139 words) - 21:28, 8 February 2024
• BBN Pager
  It was used to support the [[TENEX]] [[operating system]] - although one was also added to the KA10 at [[Stanford Artificial Intell ...ate cables), and also to make changes to the CPU required by the operating system (such as extra, specialized, [[instruction]]s).
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• Valid Logic Systems
  ...S-1; those tools were in turn descendants of [[Stanford University Design System|SUDS]]. Later, Valid expanded into [[integrated circuit|IC]] design tools a
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• Pertec tape interface
  ...tape interface was successively replaced by the universal [[Small Computer System Interface|SCSI]] interface, which is independent of the device type.
  1 KB (165 words) - 17:59, 7 January 2024
• Dartmouth Time Sharing System
  '''Dartmouth Time Sharing System''' - DTSS - first ran on a [[GE-235]] with a Datanet-30 frontend in 1964. ...; the Dartmouth system was renamed DCTS, for Dartmouth College Timesharing System.
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• Operating environment
  ...ate user programs from the native operating system; however, some of its [[system call]]s will call down to the OS that they are running on.
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• Jerry Saltzer
  ...ept, that each process has its own [[kernel]]-mode [[stack]], and that the system can pause a process, and switch to a different process (and stack), is impo He also did work on [[Compatible Time-Sharing System|CTSS]] (including the creation of the [[editor]] [[TYPSET]] and the [[word
  2 KB (309 words) - 00:27, 23 March 2024
• SC-40
  * a dual-ported [[Small Computer System Interface|SCSI]] interface; ...functions such as loading the microcode, and [[diagnostic]]s on the entire system.
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• IBM I/O channel
  ...''' (also called the '''Bus and Tag''' interface), starting with the [[IBM System/360]] (although its precursors stretch back to the [[IBM 709]]), were inten ...360 was announced, for this purpose.) The channels later appeared on [[IBM System/370]]s and compatible machines, as well as others; some manufacturers provi
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• Kernel process
  A '''kernel process''' (similar terms/concepts '''system process''', '''kernel thread''', '''kernel task''', etc) refers to the use ...ementation of the Berkeley Virtual Memory Extensions to the UNIX Operating System" (below), where it is called the "pageout daemon":
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• ITS machine configurations
  The configuration of the various [[Incompatible Timesharing System]] [[time-sharing]] [[PDP-10]] [[mainframe]]s at [[MIT]] (in the [[MIT Artif *** [[Knight TV system]]
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• Knight TV system
  ...(the 'TV-11'), which was connected to the MIT-AI [[time-sharing]] [[KA10]] system, through the [[Rubin 10-11 interface]] to the [[PDP-10]]. ...ay was a [[keyboard]]; these were all connected to the other device in the system, a keyboard [[multiplexer]].
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• MORIA
  SYSTEM job terminated at 5-FEB-2024 17:48:51.65 '''[Enter]''' After leaving the game you return to the VMS operating system prompt.
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• CalComp Model 215 Disk Drive
  ...s/Calcomp_1015A_Brochure_Dec71.pdf CalComp 1015A Dual Density Disk Storage System] - includes 215 units
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• Digital UNIX
  ...[4.4BSD]]. It is fully System V-compliant, but behaves much like a [[BSD]] system.
  854 bytes (114 words) - 21:19, 11 February 2024
• Group Coded Recording
  '''Group Coded Recording''' is an [[encoding]] system for storing data on [[magnetic tape]]. It was created by [[International Bu It uses a [[run-length limited coding]] system; five bits are written for every four bits of data. This allows it to be se
  1 KB (157 words) - 16:27, 20 April 2024
• TURBOchannel
  * [[Small Computer System Interface|SCSI]] options: PMAZ* SCSI controllers
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• Computer-aided design
  ...raphical user interface]]s; necessary for efficient interaction with a CAD system by the engineer working with it. ...[[digital]] [[circuit]] design area (such as [[Stanford University Design System|SUDS]]), although similar ideas had appeared in other fields as well. CAD t
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• Resolution
  ...ropriate system of units - e.g. 'centimeter' in locations which use the SI system.
  710 bytes (107 words) - 17:38, 15 February 2024
• Memory Test Computer
  ...em components to be used in the [[Semi-Automatic Ground Environment|SAGE]] system. It was shut down permanently on March 21, 1958; but unlike Whirlwind and t ...AR || 16 || Buffer register between all the data sources and sinks in the system; connected to 'A-Register-In' and 'A-Register-Out' [[bus]]es
  6 KB (932 words) - 22:10, 1 March 2024
• Manchester Baby
  ...e]], as it cannot modify its own program. However, contemporary [[embedded system]]s often have a [[microprocessor]] with all their [[object code|code]] cont
  5 KB (692 words) - 12:45, 27 March 2024
• Sketchpad
  ...ter used in the [[SAGE]] system). Sketchpad was undertaken on the [[TX-2]] system at [[Lincoln Laboratory]]. ...nication_System_Jan63.pdf Sketchpad: A Man-Machine Graphical Communication System] - original thesis
  1 KB (154 words) - 21:58, 3 March 2024
• Lincoln Laboratory
  ...uild the [[Semi-Automatic Ground Environment]], the US's first air defense system. It has been involved in research work useful for national defense, and mor ...ent-air-defense-system SAGE: Semi-Automatic Ground Environment Air Defense System]]
  5 KB (646 words) - 13:04, 4 March 2024
• RUNOFF
  ...tion]]s. It was written by [[Jerry Saltzer]], on [[Compatible Time-Sharing System|CTSS]]. Input files for RUNOFF were prepared with a special editor, [[TYPSE
  753 bytes (101 words) - 21:42, 4 March 2024
• Alan Turing
  ...ith a miniscule team of only a few people), the 'Delilah' voice-encryption system.
  4 KB (559 words) - 17:55, 30 March 2024
• Bendix G-15
  ....com.au/~dgreen/docs.html The Bendix G-15 General Purpose Digital Computer System Documentation]
  6 KB (870 words) - 22:44, 1 April 2024
• IAS computer
  ...in total; the number changed over time (e.g. when the [[input/output|I/O]] system was first redone, in 1952).
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• VAX 8200/8300 Revision Control
  | VAX 8200/8300 SYSTEM REVISION MATRIX | | | | | | | | | | 8200/8300 SYSTEM REVISION MATRIX |------------------------------|
  198 KB (5,881 words) - 23:03, 28 March 2024
• Packard Bell PB 250
  ...f00/ Hycomp 250 &mdash; The First Desk Top Hybrid Analog/Digital Computing System] (SP-182) - brochure
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• H95xx-H96xx Series of DEC Cabinets and Accessories
  ...sories''' from [[Digital Equipment Corporation|DEC]] is a flexible modular system for housing computers and [[peripheral]]s; the internal width gear-mounting ...G PARTITION KIT FOR H9645 CAB HAVING 2 DISKS AND ONE CENTER-MOUNTED CPU OR SYSTEM BOX||H9645
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• DR780 High-Performance Channel Interface
  ...-11_780_Dual_RK07_System_Config_198101.pdf Dual RK07 Disk-Based VAX-11/780 System Configuration] - contains a brief description of the DR780 ...E16_TU77_System_Config_198004.pdf RP06/TE16 and RP06/TU77 Based VAX-11/780 System Configuration] - ditto
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• UI750 Unibus Interface
  ...of year' (ToY) clock; and the system hardware revision level field of the System Identification (SID) [[register]].
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