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• QBUS
  ...''LSI-11 Bus''' (from its introduction in the [[LSI-11]]), was intended as a cheaper alternative to the [[UNIBUS]] general system [[bus]] from [[Digital ...ircuit|chip]]s for its [[wired-OR]] [[transmission line]]s, it differed in a number of ways.
  13 KB (2,043 words) - 23:27, 14 January 2024
• UNIBUS
  ...er of control lines. The 18 address lines allowed the direct addressing of a maximum of 256 Kbytes. Typically, the top 8 Kbytes of [[address space]] was ...could be addressed directly with 18 [[bit]]s, it was necessary to provide a [[UNIBUS map]] to allows DMA devices to 'see' all of main memory.
  13 KB (2,162 words) - 23:26, 14 January 2024
• PDP-11/83
  ...nterconnect|PMI]]-capable [[KDJ11-B]] [[CPU]] board in a [[QBUS#Backplanes|Q/CD backplane]], along with [[QBUS memory|PMI-capable memory]]; its [[UNIBUS ...MicroPDP-11 manuals below, are not specific to the PDP-11/83, but contain a great deal of material which applies to the MicroPDP-11/83
  1 KB (151 words) - 23:29, 29 February 2024
• MicroVAX I
  The '''MicroVAX I''' was the first of a number of [[MicroVAX]] models from [[Digital Equipment Corporation|DEC]]. I ...ontroller|VCB01]] Monochrome Video Subsystem added, the MicroVAX I becomes a [[VAXstation I]].
  10 KB (1,543 words) - 02:27, 7 May 2024
• List of DEC part numbers
  == A series == | M7505 || [[DEQNA]] || DEC [[Q-bus]] [[Ethernet]] Adapter
  4 KB (465 words) - 18:30, 7 January 2024
• Boot42
  M``#:'Q+0CP``!P!>T.^:%@``4-2`T5!>&?DH[XP6``"?`````&[4@]%3CZS> M"``9]=2#T5./```0`!GU%_]F%@``V@`1^P#O.`T``-`![Q$7``#[`.\&````
  9 KB (2,056 words) - 02:38, 25 December 2018
• Installing 4.2 BSD on SIMH
  You will need the following materials to put together a 4.2 BSD installation: *A working perl interpeter to make the tape images.<br>
  13 KB (2,064 words) - 18:04, 5 August 2017
• Installing 4.3 BSD on SIMH
  You will need the following materials to put together a 4.3 BSD installation: *A working perl interpeter to make the tape images.<br>
  14 KB (2,318 words) - 06:15, 1 September 2018
• Installing 4.3 BSD Quasijarus on SIMH
  ...have two choices now, either you can create your own, or you can download a pre-made tape on [https://sourceforge.net/project/showfiles.php?group_id=20 You will need the following materials to put together a 4.3 BSD Quasijarus installation:
  16 KB (2,460 words) - 12:02, 6 September 2021
• OS/2
  '''OS/2''' started as a collaborative effort between [[International Business Machines|IBM]] and [[ ...started the [[Microsoft Windows|Windows]] project around the same time, as a low cost entry interface with rudimentary (cooperative) [[multi-tasking]].
  22 KB (3,500 words) - 04:39, 13 January 2024
• Installing ITS on SIMH
  These are instructions for manually installing ITS. For a fully automated installation, see [http://github.com/PDP-10/its this reposi ...ble here. This file should be considered a companion to that document, not a replacement.
  15 KB (2,486 words) - 14:39, 20 December 2017
• ITS DDT Guide
  ...nd processor]] for [[Incompatible Timesharing System|ITS]]; it is actually a [[debugger]]. uparrow and a non-control character are used instead)
  171 KB (29,660 words) - 17:55, 28 December 2018
• Screen
  ...rams on [[UNIX]] and easily jump between them. Screen can be thought of as a 'text mode' "alt tab" like what exists in [[Windows]] to cycle thru running ...r screen session, like you have never left. This can be vital if you have a connection that is prone to dropping, and you need to do something that can
  2 KB (349 words) - 23:17, 18 December 2018
• Top
  '''Top''' is a system [[process]] monitor. The cool thing about top is that it can displa Top makes a distinction between terminals that support
  11 KB (1,552 words) - 13:03, 24 April 2024
• Unzip
  ...of text files from MS-DOS (Windows) format to UNIX or vice versa with the -a/-aa flags. file[.zip] may be a wildcard. -Z => ZipInfo mode ("unzip -Z" for usage).
  2 KB (279 words) - 00:11, 17 July 2011
• TROPIX
  | caption = Logging into a TROPIX system ...torola 68000]] machine, they were able to clone out their own system. For a while the project seemed dead with the mainstream arrival of Linux, however
  2 KB (286 words) - 23:27, 18 December 2018
• TROPIX Manual
  Chapter 14 - Reducing the size of a partition Chapter 26 - A list of key commands
  91 KB (12,020 words) - 17:55, 13 August 2019
• Installing Windows 95 on Qemu
  I've found that you really need four key things for a good Qemu Windows 95 system: ...could fdisk/format the hard disk & mount a CD-ROM.. Now if you don't have a good bootdisk for MS-DOS or an MS-DOS intall set, I'd recommend [http://www
  8 KB (1,323 words) - 01:27, 21 January 2023
• Windows NT 3.1 HCL
  ALR Evolution V-Q/60 ALR Evolution V-Q/66
  144 KB (18,526 words) - 03:17, 17 December 2018
• Windows NT 3.5 HCL
  the Windows NT operating system, or that require a device driver supplied Windows NT 3.5, please file a bug report by filling out 'PROBREP.TXT'
  279 KB (34,581 words) - 03:21, 17 December 2018
• Installing 32V on SIMH
  You will need the following materials to put together a 32V installation: *A compiled binary of vax780 from SIMH, along with the vmb.exe again from SIMH
  6 KB (1,042 words) - 22:50, 1 May 2022
• Setting Up Version 1.0 of UNIX/32V Operating System
  The distribution tape can be used only on a DEC VAX-11/780 with RP06 or RM03 disks and with TE16 tape drives. ...e records. There are interspersed tapemarks; end-of-tape is signalled by a double end-of-file.
  24 KB (3,883 words) - 10:33, 6 March 2023
• Commodore A2090 Hard Disk Controller
  This is a compilation of all the requests, questions and answers @{"4. A Note On A2000HD/A2500/20's With A2090a -Dual part boot. " link 4}
  136 KB (31,870 words) - 21:08, 14 January 2024
• Installing 3 BSD on SIMH
  * A copy of bzip2 to decompress the tape image. * a UUDECODE program for the [[3BSD bootsector|bootsector]].
  4 KB (714 words) - 07:10, 31 January 2016
• 3 BSD boot
  M``#:'Q+0CP``!0!>T`&?!``!(-`!GP0@`2#0`9\$8``@PX_D%@4`CY@Y!0!0 MPX\```4`C^06!0!1+`!N`%!A*.]_$P``GP````!N%_]O$P``^P#O'````-"/
  8 KB (1,805 words) - 14:41, 5 February 2016
• 32v 1m adb
  '''Adb''' is a general purpose debugging program. It may be used to examine files and to provide a controlled environment for
  14 KB (2,585 words) - 14:41, 26 October 2009
• 32v 1m ar
  Ar maintains groups of files combined into a single archive placed after (a) or before (b or i) posname. Otherwise
  3 KB (465 words) - 23:00, 25 October 2010
• 32v 1m ar11
  _A_r maintains groups of files combined into a single archive placed after (a) or before (b or i) _p_o_s_n_a_m_e. Otherwise
  3 KB (524 words) - 14:42, 26 October 2009
• 32v 1m dc
  input base, output base, and a number of fractional digits to be maintained. The overall structure of _d_c is a stacking
  5 KB (733 words) - 15:42, 26 October 2009
• 32v 1m ed
  If a _n_a_m_e argument is given, _e_d simulates an _e command (see _E_d operates on a copy of any file it is editing; changes
  17 KB (2,688 words) - 16:00, 26 October 2009
• 32v 1m mail
  '''Mail''' with no argument prints a user's mail, message-by-message, in last-in, first-out order; the optional reads a line from the standard input to direct disposition
  2 KB (369 words) - 15:34, 27 October 2009
• 32v 1m sdb
  _S_d_b is a symbolic debugger for C programs. It may be used to examine their files and to provide a controlled environ-
  8 KB (1,218 words) - 17:40, 26 October 2009
• 32v 1m sed
  standard output, edited according to a script of commands. A script consists of editing commands, one per line, of the
  6 KB (936 words) - 21:35, 27 October 2009
• 32v 1m troff
  _T_r_o_f_f formats text in the named _f_i_l_e_s for printing on a Graphic Systems C/A/T phototypesetter; _n_r_o_f_f for
  4 KB (690 words) - 18:39, 26 October 2009
• MSV11-J memory module
  ...''''NOTE:''''' Plugging an MSV11-J card into a regular [[QBUS#Backplanes|Q/Q backplane]] will '''damage''' the MSV11-J. ...rrecting code|ECC]] which automagically corrects single-[[bit]] errors (at a slight penalty in [[access time|response time]] when an error occurs), and
  8 KB (1,374 words) - 00:43, 30 July 2023
• Installing 4.3 BSD+NFS Wisconsin Unix
  You will need the following materials to put together a 4.3 BSD+NFS Wisconsin Unix installation: *A working perl interpeter to make the tape images.<br>
  14 KB (2,267 words) - 16:59, 5 April 2010
• Installing 4.3 BSD NFS Wisconsin Unix
  You will need the following materials to put together a 4.3 BSD+NFS Wisconsin Unix installation: *A working perl interpeter to make the tape images.<br>
  15 KB (2,380 words) - 18:46, 28 October 2020
• BootHP
  M``#:'Q+0CP``!P!>T._R&```4-2`T5!>&?DH[^08``"?`````&[4@]%3C_2A M%^^L____``["#%[O$!!:4)I0K?CO&`A:4.\`!%!0>`-04,!0K?CO"!A:4)I0
  11 KB (2,368 words) - 14:43, 5 February 2016
• Installing 386BSD on BOCHS
  ...ne but you are on your own figuring out how to get the emulator networked. A good starting point is http://bochs.sourceforge.net/doc/docbook/user/bochsr Special attention has been given to the ability to run the emulator in a terminal and in the background.
  27 KB (4,355 words) - 23:38, 26 March 2023
• Snoopy Calendar
  The snoopy calendar is a semi-frequently touched on item that "[[Real Programmers Don't Use Pascal|r Here is a session of building the program with [[f2c]] under Windows NT.
  274 KB (10,852 words) - 07:00, 14 December 2018
• Installing v7 on SIMH
  ...l need the [[Mkdisttap.pl#Research Unix v7|mkdisttap.pl]] script to output a v7.tap file. NOTE: Comments at the end of a line of the form:
  6 KB (911 words) - 01:10, 22 July 2020
• Setting Up Unix - Seventh Edition
  The distribution tape can be used only on a DEC with a TU10, TU16, or TE16 tape drive. It consists of some
  27 KB (4,414 words) - 02:56, 17 January 2023
• Installing UNIX v6 (PDP-11) on SIMH
  NOTE: Comments at the end of a line of the form: I'm going to expect you to have the [[SIMH]] emulator, 3.8-1 or higher, and a Unix v6 tape [http://sourceforge.net/projects/bsd42/files/Install%20tapes/R
  6 KB (1,109 words) - 19:03, 10 March 2021
• Setting up UNIX - Sixth Edition
  I just generated this from a Unix v6 image, by simply running: Programming in C - A Tutorial
  29 KB (3,738 words) - 02:56, 17 January 2023
• Installing NetBSD 1.2 on the SIMH MicroVAX II
  Installation of [[NetBSD]] 1.2 on the [[MicroVAX II]] is a little shaky... Also I found that the miniroot from 1.3 is far more stable ...o know the geometry of a disk, and all of it's parameters.. So for me it's a tad daunting, but they do give an RD54 as an example. Here is the disktab
  17 KB (2,338 words) - 21:14, 10 April 2012
• Darwin
  In the beginning of the project it was a fork of [[OPENSTEP]]. As far as I've been able to track down there have be ...matimago.com/next/developer.apple.com/darwin/news/qa20010925.html Darwin Q&A].
  9 KB (1,352 words) - 17:58, 13 January 2024
• Visual C++ 1.1
  ...the [[Windows NT 3.1 SDK]]. Applications compiled with this version using a CRT [[DLL]] required MSVCRT10.DLL, which is not common and not preinstalled ...to truncate [[executable]]s correctly, leaving them as multiples of 2Mb. A fix for this bug was posted to Microsoft's now defunct [[FTP]] site at ftp:
  6 KB (799 words) - 13:28, 19 October 2018
• Windows NT 3.1 SDK
  ...y all over the place as promo items, as NT 3.1 was more of a freebie, then a sold product back then. The SDK did include the command line compiler, but /a Build all evaluated targets
  10 KB (1,224 words) - 03:20, 17 December 2018
• QNX
  ...oach to building an OS. Originally developed in the early 1980s, it is now a commercial product, targeted at [[embedded system]] uses. * [https://webcache.googleusercontent.com/search?q=cache:EnqHVmO55MEJ:www.qnx.com/developers/docs/qnxcar2/topic/com.qnx.doc.ne
  2 KB (337 words) - 02:49, 21 February 2024
• SIXBIT
  '''SIXBIT''' is a predecessor encoding system to [[ASCII]]; it too supported encoding various | '''4.''' || @ || A || B || C || D || E || F || G
  1 KB (174 words) - 23:15, 24 April 2024
• KD11-E/EA microcode
  ...cal. (The KD11-EA contains additional microcode associated with the [[FP11-A Floating-Point Processor]], which is not covered here.) ...son for the change is unknown. Also, a dump of the KD11-EA microcode gives a different 'next microinstuction', from that given in the prints, for microi
  31 KB (3,760 words) - 05:02, 5 November 2022
• Installing 4.0 BSD on SIMH
  * You will need a working copy of SIMH's vax780.exe for your platform. * A 4.0 BSD install tape. You can download one from [http://sourceforge.net/pr
  5 KB (848 words) - 07:12, 2 February 2016
• 4.0 BSD boot
  I wish I could upload binaries. until then use [[uudecode]] to get a working boot program. M``#:'Q+0CP``!P!>T`&?!&``(-"?`&``(%#3CP```0!0$_#0[U<4``!0U(#1
  9 KB (1,962 words) - 02:44, 25 December 2018
• Bug fixes and changes in 4.1bsd
  been substantially improved by correcting a problem Processes which are known to need only a small amount
  39 KB (5,307 words) - 05:01, 11 December 2018
• Xv6 homework 4
  ...e. Please write up your answers to the exercises below and hand them in to a 6.828 staff member at the beginning of lecture. sh-3.00$ wget -q http://pdos.csail.mit.edu/6.828/2006/src/xv6-rev0.tar.gz
  5 KB (735 words) - 15:55, 30 December 2018
• Compiling KLH10
  ...]] Gentoo machine with 2GB RAM and gcc 4.5.3-r1. The author currently has a bad cold, so please excuse any mistakes/foolishness caused by light-headedn ...2012. The system has been configured as a 'multilib' configuration, with a mixture of 32- and 64-bit. By default, gcc compiles for 64-bit.
  7 KB (1,201 words) - 06:26, 16 December 2018
• Inside OS/2
  A Division of Microsoft Corporation Although a book can have a single author, a work such as OS/2 necessarily
  627 KB (92,395 words) - 03:42, 17 December 2018
• Installing 2.9 BSD on SIMH
  This is probably a little extreme, but it does work. ...ape image, with the files found on the TUHS archive. Alternatively I have a pre-made tape [http://sourceforge.net/projects/bsd42/files/Install%20tapes/
  6 KB (835 words) - 13:57, 29 May 2020
• Installing Ultrix 4.5 on SIMH
  This WORK-IN-PROGRESS guide will be a simple guide to installing [[ULTRIX]] 4.5 for VAX on [[SIMH]]. The following is a list of things required for installation
  44 KB (6,192 words) - 09:30, 29 September 2023
• Upgrading QBUS backplanes
  ...F1 (BDAL18-BDAL21, respectively) on all '''''QBUS''''' slots together into a bus. So one wires BC1 on slot 1 to BC1 on slot 2, slot 3, etc, etc. ...n't run the extra BDAL lines to the C/D connectors, bur rather only on the A-B connectors wired for QBUS (which run down the left-hand side, when facing
  3 KB (601 words) - 02:11, 10 July 2023
• LSI-11
  ...-11.jpg|250px|thumb|right|M7264 KD11-F board (etch revision F), with KEV11-A]] The LSI-11 is a [[DEC card form factor|quad]] board (M7264) with additional functionality o
  3 KB (411 words) - 22:06, 20 December 2023
• QBUS memories
  ...ds are available both from [[Digital Equipment Corporation|DEC]], and from a large number of outside vendors who produced and sold QBUS [[main memory]] Note that although Q18 memory cards can be plugged into a Q22 machine (e.g. most [[PDP-11/23]]'s, and all [[PDP-11/73|-11/73]]'s), an
  5 KB (835 words) - 02:21, 20 September 2022
• 3BSD bootsector
  I wish I could upload binaries. until then use [[uudecode]] to get a working boot program. M``#:'Q+0CP``!0!>T`&?!``!(-`!GP0@`2#0`9\$8``@PX_D%@4`CY@Y!0!0
  8 KB (1,828 words) - 02:37, 25 December 2018
• Installing 4.1 BSD on SIMH
  * You will need a working copy of SIMH's vax780.exe for your platform. * A modified 4.1 BSD install tape. You can download one from [http://sourcefor
  7 KB (1,100 words) - 07:32, 2 February 2016
• Installing 4.1c BSD on SIMH
  You will need the following materials to put together a 4.1c BSD installation: *A working zip tool to extract .zip files
  13 KB (2,077 words) - 16:30, 7 August 2017
• Clearpoint Q-RAM 11
  ...arpoint Q-RAM 11''' is a 512 Kbyte [[QBUS]] [[main memory|memory]] card in a [[DEC card form factor|quad]] QBUS card-size format, using 64Kx1 DRAMs. ...s four banks (i.e. it has a 9x4 array of xx64 64Kx1 chips; i.e. to provide a 16 bit wide bank of 128 Kbytes, plus byte parity, there are four groups of
  2 KB (352 words) - 02:52, 14 December 2020
• Small Peripheral Controller
  ...slot, occupying [[DEC edge connector contact identification|rows C-F]] in a hex slot. ...e Reader/Punch Control|PC11]] (M781), the [[DR11-A parallel interface|DR11-A]] (M786), and the [[CR11 Controller|CR11]] (M829).)
  5 KB (868 words) - 23:38, 9 April 2022
• DEC alphabet
  A,B,C,D,E,F,H,J,K,L,M,N,P,R,S,T,U,V I.e. leaving out 'G', 'I', 'O' and 'Q', which when poorly printed might be mistaken for '0', '1', etc.
  720 bytes (132 words) - 15:42, 8 August 2023
• SS-50 bus
  ...instead of the 16 in the original. It was designed for the [[STWPC S/09]], a paged-memory 6809 system. The bus is made by a sequence of Molex connectors, with pins on the motherboard. The extension b
  6 KB (1,084 words) - 16:55, 16 February 2024
• Private Memory Interconnect
  ...CPU]]. It also provides means for the [[Central Processing Unit|CPU]] and a [[KTJ11-B UNIBUS adapter|KTJ11-B]] [[UNIBUS]] adapter to communicate in pro ...ct Memory Access|DMA]] cycles (mapped to the full 22-bit address space via a [[UNIBUS map]]), and to interrupt the CPU.
  4 KB (731 words) - 17:11, 6 February 2024
• CD interconnect
  ...nnector contact identification|C and D connectors]] of a [[QBUS#Backplanes|Q/CD backplane]]. ...connections are used to connect together board pairs, without the need of a so-called '[[over the back]]' connector cable.
  3 KB (524 words) - 16:15, 22 June 2023
• DEC asynchronous serial line pinout
  ...with a standard pin-out across all instances. Thus, all the interfaces of a given header type all took standard interface cables. ...cards (for the 40-pin header, the cable is the BC05C for EIA operation as a DTE, and the BC05M for 20mA current loop; for the 10-pin header, the BC20N
  7 KB (1,240 words) - 01:17, 16 June 2022
• KT11-B Technical Manual
  ...al. This page attempts to provide at least the high-level portions of such a manual. ...s. A latching input data multiplexor is provided to select among data from a number of sources for storage in the scratchpad.
  31 KB (4,983 words) - 18:22, 2 July 2023
• KT11-B Major State circuitry
  This is a detailed description of the the circuitry that generates the major state of ...tion 4.3; it can produce 4 different states from 2 bits, not possible with a shift register.)
  2 KB (368 words) - 18:24, 2 July 2023
• KTJ11-A
  ...SV11-Q/M/J Memory Comparisons") mentions a "KTJ11-A", but it appears to be a typo; only the [[KTJ11-B]] is known.
  181 bytes (30 words) - 16:09, 16 December 2018
• Visual C++ 2.0
  ...used on Windows 95 support. Applications compiled with this version using a CRT DLL required MSVCRT20.DLL. /A Build all evaluated targets /B Build if time stamps are equal
  6 KB (766 words) - 02:02, 17 December 2018
• Visual C++ 4.0
  ...t entered the browser wars. Applications compiled with this version using a CRT DLL required MSVCRT40.DLL. Because Visual C++ 4.0 arrived slightly aft /A Build all evaluated targets /B Build if time stamps are equal
  7 KB (835 words) - 02:03, 17 December 2018
• Visual C++ 5.0
  ...rPC had been dropped on Windows NT, so 5.0 existed as an Intel version and a RISC version which only supported Alpha. /A Build all evaluated targets
  7 KB (913 words) - 02:04, 17 December 2018
• Visual C++ 1.5
  ...sual C++ 4.0]], becoming the last 16 bit release. Although Visual C++ was a Windows IDE, the underlying compiler supported generating DOS executables a ...of memory models supported in 16 bit Windows, it was not possible to have a CRT DLL. All applications were required to statically link the correct ver
  8 KB (976 words) - 02:02, 17 December 2018
• Bootstrap
  To '''bootstrap''' (the term can also be used as a noun) means to start a computer-related system from nothing. It has two main meanings: ...[operating system]]. Earlier methods for entering the bootstrap code into a blank memory, was special hardware for reading data off an external device
  1 KB (255 words) - 09:08, 11 August 2023
• WAITS
  ...tificial Intelligence Time-Sharing" (although these may be a 'backronym' - a SAIL page which discusses the meaning of the name does not mention it). It ...from [[III]], [[raster]] displays from [[Data Disc]], robotic devices, and a powerful sound synthesis device called the [[Samson Box]].
  6 KB (920 words) - 13:33, 6 January 2024
• VT52
  The '''VT52''' was a very popular [[video terminal]] by [[Digital Equipment Corporation|DEC]], i It uses a custom processor built from [[transistor-transistor logic|TTL]] parts to ex
  4 KB (577 words) - 12:26, 16 January 2024
• Flip-flop
  ...IAS computer]]) is an extremely common element in digital [[logic]]; it is a store for one bit of state. ...out of [[transistor]]s, all forms of flip-flop and latch (there are quite a few) can be made out of gates. All involve feedback, from the outputs, to s
  5 KB (786 words) - 21:09, 8 April 2024
• ASCII
  ...h as letters, numbers, etc) into 7-[[bit]] numeric form. It was created by a predecessor to [[American National Standards Institute|ANSI]]. ...early 1960s from telegraph code. Its first commercial use, in 1963, was as a teleprinter code promoted by Bell data services for the TWX network. Later,
  6 KB (713 words) - 08:39, 9 April 2024
• Term-Mite ST Smart Terminal/TermMite.asm
  ...listings of the original which came with the Term-Mite was likely used as a guide through the code in this process. stlup mov a,#0AAH ;test regs with pattern=AA
  24 KB (5,539 words) - 03:05, 27 December 2018
• BA11-M mounting box
  ...5A of +12V); and an [[H9270 backplane|H9270-A]] 4-slot [[QBUS#Backplanes|Q/Q]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards ...was only [[QBUS#Variable_address_size|Q16]] capable, making the Q18 H9270-A backplane somewhat excessive. Later on it was used for the Q18/Q22 [[PDP-11
  2 KB (353 words) - 03:21, 11 July 2023
• BA11-N mounting box
  ...ower supply]], and an [[H9273 backplane|H9273-A]] 9-slot [[QBUS#Backplanes|Q/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] ca ...'s [[KDF11-A CPU]] (Q18 only), later revisions really were better off with a Q22 backplane, as in the up-rated [[BA11-S mounting box]].
  3 KB (577 words) - 03:22, 11 July 2023
• BA11-S mounting box
  ...] [[mounting box]] from [[Digital Equipment Corporation|DEC]]; effectively a [[QBUS#Variable_address_size|Q22]] variant of the earlier [[BA11-N mounting ...problem with this seems to have been the [[MMV11-A QBUS core memory|MMV11-A]].)
  3 KB (457 words) - 03:22, 11 July 2023
• MMV11-A QBUS core memory
  [[Image:MMV11-A.jpg|350px|thumb|right|MMV11-A board set, showing only the G653 mother-board]] '''MMV11-A''' is a [[core memory|core]] [[main memory]] module for the [[QBUS]] - the only cor
  2 KB (372 words) - 19:26, 13 July 2023
• Able Computer
  '''Able Computer''' was a company based in Irvine, California which made a variety of [[device controller]]s and similar devices (e.g. [[cache]]s) for | Q/DH || &nbsp; || quad || Y || QBUS
  4 KB (493 words) - 18:48, 5 December 2022
• Flow control
  '''Flow control''' refers to the need to prevent a sender of data from sending it so fast the receiver cannot take it all in. In [[asynchronous serial line]]s, a variety of techniques are used.
  2 KB (283 words) - 14:47, 18 October 2021
• Chaosnet interface
  ...actor|quad]] [[wire-wrap]]ped card. <!-- They therefore take up two slots; a [[grant continuity card]] is required, to plug into the second slot, to car ...the defaults are 0764140 and 0270. The [[network address]] is also set via a DIP switch.
  5 KB (709 words) - 18:28, 17 September 2023
• KEV11-C Commercial Instruction Set
  ...[[integrated circuit|chip]] for [[LSI-11 chip set]] which adds support for a subset of the [[PDP-11 Commercial Instruction Set]], sometimes known as DIS The DIS cannot be used with the [[KEV11-A floating point]] chip, not only because of the limited number of [[microcod
  1 KB (241 words) - 21:11, 2 July 2023
• Repairing un-documented MOS memory boards
  ...tic errors probably indicate a failing/failed [[integrated circuit|chip]], a common failure mode of old MOS memory chips. ...step in working with one of them, without a circuit diagram, is to create a table which translates memory chip to bits.
  5 KB (971 words) - 14:05, 18 October 2020
• Bus Arbitration on the Unibus and QBUS
  ...was a design flaw in the [[UNIBUS]] that could, on rare occasion, lead to a bus-arbitration failure, and that this was discovered and fixed in the QBUS ...erilog code, and that lead to an effort to understand the problem and find a workable solution. This paper is our attempt to document the results for th
  21 KB (3,685 words) - 04:35, 28 November 2023
• QBUS backplanes
  ...nector contact identification|group of edge connector pins]], denominated 'A'-'D'. ...d Q/Q units, both sides of each quad slot are fully wired for QBUS, and so a single slot can hold two separate dual-width QBUS [[peripheral controller|d
  4 KB (676 words) - 23:17, 6 April 2024
• MSV11-Q QBUS memory
  The '''MSV11-Q''' (M7551) is a [[DEC card form factor|quad]]-height [[QBUS]] [[Dynamic RAM|DRAM]] [[main m Each board has a single control [[register]], which can be configured in the range 172100-17
  6 KB (898 words) - 21:25, 16 March 2022
• KA650 Main Memory System
  ...Processing Unit|CPU]] card, which contains the main memory controller, and a number of MS650 boards; they communicate over the MS650 memory interconnect ...ing 256kxX DRAM chips. The data lines are carried to the RAM cards through a 50 conductor [[flat cable|ribbon cable]], while the rest of the control lin
  42 KB (5,491 words) - 12:55, 7 May 2024
• MSV11
  '''MSV11''' refers to a number of different [[semiconductor]] [[main memory]] systems for [[QBUS]] * [[MSV11-Q QBUS memory|MSV11-Q]]
  616 bytes (99 words) - 21:28, 2 July 2023
• MSV11-R memory module
  The '''MSV11-R''' (M7458) is a [[DEC card form factor|quad]]-height [[QBUS]]/[[Private Memory Interconnect ...D backplane]]. Plugging an MSV11-R card into a regular [[QBUS#Backplanes|Q/Q backplane]] will '''damage''' the MSV11-R.
  6 KB (962 words) - 15:51, 24 December 2021

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