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• DR11-M general-purpose interface
  ...provided a pair of 16-[[bit]] parallel ports, both output-only. It was a [[DEC card form factor|quad]] format card ('''M7865'''), and used an [[Small Peri * SI - Status In: Signal from user's hardware which can be tested
  3 KB (419 words) - 21:19, 24 November 2022
• DRV11-WA General Purpose DMA Interface
  It was a [[DEC card form factor|dual]] format card (M7651); connection to the user's devic * ATTN - Attention; signal from user's hardware which can be tested, or cause an [[interrupt]] (below)
  4 KB (529 words) - 19:12, 2 December 2021
• DHV11 asynchronous serial line interface
  ...and has extended capabilities, including a [[diagnostic]] self-test, and [[hardware]] in-band [[flow control]] support (on both input and output); Physically, the DHV11 consisted of a single [[DEC card form factor|quad]] card, the M3104. It uses four Dual [[Universal Asyn
  6 KB (894 words) - 11:33, 17 February 2023
• H967 rack
  ...version of the [[H960 rack|H960 cabinet]], [[Digital Equipment Corporation|DEC]]'s standard 19" wide rack (an industry-wide standard width for rack-mounte ...s, each of which could be further sub-divided into two 5-1/4" spaces. Most DEC gear (e.g. [[BA11 mounting boxes]]) was designed to fit in spaces of these
  924 bytes (139 words) - 16:55, 22 April 2024
• Systems Concepts
  ...''' was a company (originally located in San Francisco) which built custom hardware, initially for [[KA10]] [[PDP-10]]s. It was founded by Stewart Nelson and M ...rformance PDP-10 compatible machine, after [[Digital Equipment Corporation|DEC]] cancelled further PDP-10 replacements. The SC-25 was a lower-performance
  1 KB (192 words) - 18:53, 21 January 2024
• DEC part number
  ...' (sometimes the first hyphen is omitted). [[Digital Equipment Corporation|DEC]] had a system for their part numbers, such that looking at a part number w ...these numbers are ''not'' 'DEC part numbers', as defined by the applicable DEC specifications (below).
  3 KB (363 words) - 16:38, 14 August 2022
• PDP-3
  ...version of the [[PDP-1]]. Supposedly, only one was ever built (and not by DEC). ...s book ''Computer Engineering - A DEC View of Hardware Systems Design'']: "DEC also never built a PDP-3, although one was designed on paper as a 36-bit ma
  1 KB (227 words) - 14:48, 10 January 2024
• MLP-900
  ...he right [[microcode]] loaded the MLP could emulate a [[KA10]] faster than DEC's KA10. === From "The Early ISI Years: A Firsthand Account from the Hardware Team" ===
  3 KB (477 words) - 15:39, 24 April 2024
• PDP-4
  | manufacturer = [[Digital Equipment Corporation|DEC]] ...P-4''' was a small computer produced by [[Digital Equipment Corporation]]; DEC's second production computer, and another 18-bit machine, like its predeces
  6 KB (775 words) - 20:00, 7 February 2024
• DQ11 NPR Synchronous Line Interface
  ...nsion, the '''DQ11-BB''', provided programmable [[character]] detection in hardware, for functions such as DLE [[stuffing]]. ..., which were installed in a custom 4-slot [[backplane]] [[system unit]] ([[DEC part number]] 70-09467). Installation of the DQ11-AB or DQ11-BB required an
  8 KB (1,222 words) - 04:17, 18 February 2023
• Grant continuity card
  ...e 'in' pins to the 'out' pins in the slot. [[Digital Equipment Corporation|DEC]]'s [[UNIBUS]] and [[QBUS]] use them. [[Category: Hardware Basics]]
  554 bytes (82 words) - 22:39, 3 December 2021
• Port Expander
  ==Potential hardware problem== ...aid it had been tested and worked with the [[Digital Equipment Corporation|DEC]] AN-10 and [[IMP11-A ARPANET interface|IMP11-A]], and the [[Advanced Compu
  6 KB (1,100 words) - 06:47, 23 January 2024
• C. Gordon Bell
  ...important works were his contributions to [[Digital Equipment Corporation|DEC]]'s two most successful computer families, the [[PDP-11]] and the [[VAX]] l He was at DEC for two periods, 1960-1966 and 1972-1983, ending up as DEC's Vice President of Research & Development, with a spell in between as an a
  2 KB (254 words) - 00:18, 23 March 2024
• DEC Semiconductor Chips
  [[integrated circuit|Chips]] from [[Digital Equipment Corporation|DEC]]: <div id="ref_11">[11] [http://bitsavers.trailing-edge.com/pdf/dec/semiconductor/1987_Digital_Semiconductor_Databook_Vol_2.pdf Digital Semicon
  36 KB (3,420 words) - 05:36, 5 November 2022
• M7850 parity controller
  ...which has different backplane wiring for parity and non-parity memory, no hardware changes are needed to switch from non-parity to parity memory with the M785 ...850 is a [[DEC card form factor|dual]] format card, which plugs into the [[DEC edge connector contact identification|two top (AB) sections]] of the [[Modi
  3 KB (434 words) - 00:07, 20 April 2024
• THE VAXORCIST
  and the hardware is slowly being backlit by a pulsing red light. A peal of printing backwards... yes... miscellaneous hardware flying through the air...
  15 KB (2,569 words) - 08:21, 20 May 2022
• UNIX Third Edition
  ...to have run on the [[PDP-11/45]] model of the PDP-11: "it depends on what hardware is present ([[KE11-A Extended Arithmetic Element|EAE]], [[FP11-B Floating-P ...fy the preparation of object programs for systems which have no relocation hardware." ([http://squoze.net/UNIX/v3man/man1/reloc reloc (I)])
  4 KB (674 words) - 03:58, 20 October 2023
• UNIX Second Edition
  ...UNIX had a KS11 - "the current system, which has relocation and protection hardware". ([http://squoze.net/UNIX/v2man/man5/core core(V)]) ...ant to realize that not all the machines running UNIX would have had their hardware updated simultaneously: e.g. the patent group's -11/20 would not have neede
  5 KB (926 words) - 03:54, 20 October 2023
• VAX-11/750 & VAX-11/751 Revision Control
  3.1 Kernel Identification Register Hardware 11/750 system for purposes of identifying the compatible hardware,
  101 KB (10,182 words) - 14:04, 2 July 2022
• Maintenance Documentation Service
  '''DEC MDS''' = [[Digital Equipment Corporation|DEC]] Maintenance Documentation Service * '''DEC-O-LOG'''s (DEC Hardware Service Instructions about '''FCO'''s (see below)
  931 bytes (118 words) - 02:55, 17 January 2023

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