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The BITSAVERS.ORG Documents Library: Digital Equipment Corporation

Digital Equipment Corporation, also known as DEC and using the trademark DIGITAL, was a major American company in the computer industry. It was a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s, with its PDP and VAX products were the most successful (in terms of sales) minicomputers. From 1957 until 1992 its headquarters was located in a former wool mill at Clock Tower Place, Maynard, Massachusetts. DEC was acquired in June 1998 by Compaq, which subsequently merged with Hewlett-Packard in May 2002. Some parts of DEC, notably the compiler business and the Hudson, Massachusetts facility, were sold to Intel.

Digital Equipment Corporation should not be confused with the unrelated companies Digital Research, Inc or Western Digital, although the latter manufactured the LSI-11 chipsets used in DEC's low end PDP-11/03 computers.

Initially focusing on the small-end of the computer market allowed DEC to grow without its potential competitors making serious efforts to compete with them. Their PDP series of machines became popular in the 1960s, especially the PDP-8, widely considered to be the first successful minicomputer. Looking to simplify and update their line, DEC replaced most of their smaller machines with the PDP-11 in 1970, eventually selling over 600,000 units and cementing DECs position in the industry. Originally designed as a follow-on to the PDP-11, DEC's VAX-11 series was the first widely used 32-bit minicomputer, sometimes referred to as "superminis". These were able to compete in many roles with larger mainframe computers, such as the IBM System/370. The VAX was a best-seller, with over 400,000 sold, and its sales through the 1980s propelled the company into the second largest in the industry. At its peak, DEC was the second largest employer in Massachusetts, second only to the state government.

The rapid rise of the business microcomputer in the late 1980s, and especially the introduction of powerful 32-bit systems in the 1990s, quickly eroded the value of DEC's systems. DEC's last major attempt to find a space in the rapidly changing market was the DEC Alpha 64-bit RISC processor architecture. DEC initially started work on Alpha as a way to re-implement their VAX series, but also employed it in a range of high-performance workstations. Although the Alpha processor family met both of these goals, and, for most of its lifetime, was the fastest processor family on the market, it did little to affect the bottom line or repair the company's status.

The company was acquired in June 1998 by Compaq, in what was at that time the largest merger in the history of the computer industry. At the time, Compaq was focused on the enterprise market and had recently purchased several other large vendors. DEC was a major player overseas where Compaq had less presence. However, Compaq had little idea what to do with its acquisitions, and soon found itself in financial difficulty of its own. The company subsequently merged with Hewlett-Packard in May 2002. As of 2007 some of DEC's product lines were still produced under the HP name.

Original from Wikipedia


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From the bitsavers.org collection, a scanned-in computer-related document. dec :: magtape :: tm11 :: TM11 engineeringDrws
Topics: bus, cable, data, bit, sel, unit, pin, bfr, cnd, chan, data bfr, tape unit, cable cable, pin order,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: AC-F080A-MC X11monLib Sep78
Topics: mov, module, seq, routine, oooooog, globl, jsr, endif, address, inline, mov mov, common...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: Books :: 101 BASIC Computer Games Mar75
favoritefavoritefavoritefavorite ( 1 reviews )
Topics: print, vou, goto, vour, input, program, gosub, computer, game, print print, program listing,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KL10 :: MP01712 DN20F Engineering Drawings Mar84
Topics: bus, data, rev, assy, digital, corporation, dec, sheet, item, variation, equipment corporation,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0187 CMT098.MCX 750uCod
Topics: rev, clokx, clock, rate, mode, address, operand, mdr, set, clock rate, clokx rev, floating point,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp8 :: handbooks :: IntroToProgramming1969
Topics: program, tad, instruction, user, binary, location, dca, jmp, command, octal, paper tape, cla cll,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: handbooks :: 1974 Field Service Technical Manual Dec74
Topics: processor, applicability, tech, rev, author, reference, approval, cross, title, revision, cross...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197409
Topics: bfb, css, cont, cat, ipg, tpl, engr, snt, quad, arr, css css, bfb bfb, cat cat, ipg ipg, status...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: 780 :: MP00496 KA780 Nov77
Topics: data, bus, buff, sbi, csa, digital, buf, clk, alu, latch, digital equipment, read data, write data,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: LCG GoodStuffNewsletters
Topics: confidential, error, ebus, company, debug, data, diagnostic, gnd, lcg, parity, company...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197406
Topics: css, bfb, cat, snt, tpl, cont, engr, lbh, quad, ipg, css css, bfb bfb, lbh lbh, cat cat, eas eas,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0170 CJKDJB0 1123B
Topics: mov, test, emt, cpu, cmp, cluster, dnmac, mode, beq, clr, cpu cluster, mov mov, beq emt, cmp beq,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: Turnbull XXDP Feb93
Topics: xxdp, monitor, file, device, program, command, diagnostic, commands, diagnostics, memory, small...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0109 CSRQAD0 RQDX1
Topics: mov, oooooog, exerciser, error, cmp, addr, jsr, routine, seq, ascii, oooooog oooooog, test...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KL10 :: 1080 2040 2060 Engineering Functional Spec
Topics: error, spec, iii, address, parity, data, rev, memory, user, iii iii, parity error, functional spec,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: 780 :: fiche :: EP-ES0AA-DL-124 1of6 780uCode Jan82
Topics: pcs, microcode, patches, resvrd, patch, alu, fpla, fiche, code, frame, pcs microcode, microcode...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0100 COKDAB0
Topics: mov, error, cmp, test, data, apr, beq, clr, branch, jsr, mov mov, cpu error, cmp beq, oooooo...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KI10 :: KI10 Schem
Topics: key, scad, clk, clr, inst, cyc, ptr, sync, assertion, cycle, signal names, low assertion, assertion...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp8 :: handbooks :: Small Computer Handbook 1973
Topics: data, memory, dec, flag, program, instruction, interrupt, octal, device, data break, word count,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1104 :: MP00019 1104 EngrDrws Feb78
Topics: bus, assy, dec, digital, pin, gnd, rev, gno, drawing, print, bus bus, print set, digital equipment,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0174 CKKTBD0 1144mmgmt
Topics: mov, error, test, macro, stack, prt, mgmt, mode, psw, load, mov mov, mgmt prt, memory management,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: decus :: confProceedings :: DECUS 1968 Fall
Topics: data, program, system, computer, display, control, output, input, core, device, data acquisition,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: graphics :: GT40 Graphic Terminal Engineering Drawings Feb73
Topics: wire, bus, hanq, gnd, rom, dec, assy, goto, hand, corporation, hanq wire, hand wire, equipment...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: basic :: AB-2045B-SC BASIC PTS Listing Mar77
Topics: mov, hov, jsr, tst, cmp, bne, cmpb, nov, jmp, beo, mov mov, kkk kkk, hov hov, rrr rrr, aaa aaa,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1160 :: MAINDEC-11-DQFPB-B FP11-E May77
Topics: test, data, set, initial, float, mov, ptr, scope, fec, jsr, data set, test data, uata set, scope...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: 730 :: MP01270 11730 Engineering Drawings Apr82
Topics: bus, hex, assy, csr, digital, rev, ucsh, sheet, cpu, data, digital equipment, equipment...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197312
Topics: bfb, css, cat, ipg, snt, cont, tpl, engr, interface, control, bfb bfb, cat cat, css css, paper...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: ultrix-32 :: 3.0 :: AA-MF08A-TE ULTRIX-32 Supplementary Documents Vol.3-System Manager
Topics: gen, file, system, sys, command, program, pgm, files, disk, device, file system, system call, root...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1160 :: MAINDEC-11-DQKDC-A 1160cpuExerc Jan77
Topics: mov, hlt, cpu, error, address, hov, cmp, tst, stack, data, mov mov, serifs cpu, series cpu, cpu...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp8 :: handbooks :: SmallComputerHandbook 67-68
Topics: program, data, memory, instruction, flag, core, content, octal, address, core memory, data break,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: graphics :: VT11 :: GT40 Graphic Terminal Engineering Drawings Feb73
Topics: wire, bus, hand, dec, gnd, assy, rom, hanq, goto, corporation, hand wire, bus bus, hanq wire,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: rsts :: V07 :: RSTSE V7.0 InternalTraining
Topics: file, oooooo, disk, device, data, cache, caching, monitor, system, program, resident library, data...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1140 :: PDP-1140 System Engr Drawings Rev P Jun74
Topics: dec, bbbb, bus, assy, corporation, module, clk, drawing, rev, xxx, bbbb bbbb, equipment...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0107 CZRCHB0 RC25fmtr
Topics: mov, ascii, oooooog, formatter, command, rev, error, disk, patch, code, disk formatter, zrchbs...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: Books :: Bell-ComputerEngineering
Topics: memory, data, processor, design, computer, instruction, logic, figure, control, instruction set,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1105 :: 1105S Schem
Topics: goto, orr, rom, dec, assy, brg, oooo, nxt, dpf, rev, orr orr, equipment corporation, digital...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KS10 :: microcode :: KS702
Topics: microcode, micro, skip, byte, mem, vma, load, flags, pointer, store, low word, skip dpo, cross...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: unibus :: MP00105 RK611 schem Aug77
Topics: bus, gnd, ecc, clk, cyl, ubl, wrt, clr, obuf, pin, pin order, digital equipment, tsrfg bus,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197503
Topics: bfb, cont, cat, css, quad, arr, periph, interface, ipg, oem, cat cat, bfb bfb, arr arr, async...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0210 ZZ-ENSAA-7.0 DiagSuperv
Topics: frame, macro, routine, movl, fiche, address, sequence, device, error, entry, cross reference,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: ultrix-32 :: 3.0 :: AA-MF06A-TE ULTRIX-32 Supplementary Documents Vol.1-General User
Topics: gen, command, file, sys, text, commands, unix, input, lines, pgm, system call, reference manual,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197506
Topics: bfb, css, ipg, cont, cat, engr, tpl, quad, rfb, periph, bfb bfb, css css, cat cat, ipg ipg, rfb...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: Options and Modules List 197403
Topics: bfb, css, ipg, snt, cat, lbh, engr, cont, quad, tpl, bfb bfb, lbh lbh, css css, rhm rhm, ipg ipg,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: bi :: KDB50 Microcode Listing Sep88
Topics: mov, oooooo, error, sdi, buffer, bar, assembler, digital, version, nop, assembler version, digital...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KL10 :: EK-OKL10-MG-004 KL10 Maintenance Guide Update Jun86
Topics: error, command, data, port, buffer, node, address, chk, parity, debug, parity error, error code,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1144 :: MP00897 11X44sys Dec79
Topics: bus, pax, int, assy, digital, rev, data, item, code, sel, int bus, digital equipment, document...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: Sze Introduction to DEC System-10 1974
Topics: file, program, command, fortran, data, batch, user, output, terminal, commands, fortran program,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp15 :: XVM MUMPS Listing Sep75
Topics: lac, dac, jmp, char, sad, call, oac, isz, tad, mumps, char pos, call ochari, lac dac, call save,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1170 :: MP0KB11-C0 1170engDrw Nov75
Topics: mux, dec, mapa, pdrb, bus, err, adrs, digital, sapk, corporation, equipment corporation, digital...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KS10 :: MP00540 KS10 MaintSch Mar81
Topics: data, adr, bus, ibnf, rec, clk, sel, csl, code, dbus, bus data, rec ksbus, ksbus bit, crna bit, csl...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: ssi :: AA-5074O-RK System Software Information Jun88
Topics: vax, guide, spd, microvms, operating, product, software, base, manual, documentation, base...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: priceLists :: US Systems Services Price List Dec91
Topics: vms, vax, license, warranty, ultrix, model, software, system, upg, upgrade, price list, number...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1160 :: MAINDEC-11-DQFPE-A-D Sep77
Topics: oooooo, error, loop, data, nov, test, hfp, seq, clr, sea, error loop, oooooo oooooo, table ptr, nov...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp15 :: XV100 Schematics
Topics: bus, api, ind, assy, mdl, bfl, coax, dsr, ino, sum, sum bus, shift bus, bus bit, power supply, unit...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: qbus :: MP00706-ET-LSI-11 Dec81
Topics: dal, lat, bdal, dat, ram, mux, clk, kxti, mib, csr, digital equipment, equipment corporation, chk...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: decus :: programCatalogs :: DECUS Catalog PDP-8 Aug78
Topics: program, media, source, price, focal, memory, operating, fortran, programs, decus, media price,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: unibus :: RP11-C schemMay1973
Topics: gnd, bus, pin, lpr, gno, clr, silo, exceptions, remarks, bay, pin order, order bay, length...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: internal :: Digital EL-ENGRS-OM InternalGuideToDigitalOrganizations 1988-1989Edition 1988
Topics: systems, engineering, product, digital, group, development, software, products, marketing, program,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0105 CZUDCE0 UDA
Topics: mov, error, uoa, drive, xxxxxx, disk, tst, runtime, sfq, data, drive xxx, xxx runtime, xxxxxx...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: vax :: 730 :: MP01364 FP730 Apr82
Topics: hex, dot, fpoo, fpo, loc, bus, bin, froc, fpon, fpoc, bus fpo, hex loc, hex dot, dot bin, bin dot,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0113 CZRQBC0 RQDX1fmtr
Topics: mov, oooooog, rdrx, command, routine, disk, global, formatter, rev, error, rdrx disk, global...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: disc :: ra90 :: EK-ORA90-SV-003 RA90 RA92 Service Jun90
Topics: error, drive, servo, hda, ecm, internal, digital, sdi, fault, disk, digital internal, error codes,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp10 :: KA10 :: DEC-10-HMBB-D KA10 Maint Vol2 Set2
Topics: clr, set, key, pulse, lob, bus, pin, kaio, arlt, list kaio, twp list, pin color, general wiring,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp15 :: DEC-15-H2BB-D PDP-15 EngrDrwsVol2 Dec70
Topics: bus, mdl, ind, api, corporation, kpl, rddr, rpi, dch, lop, sum bus, bus bus, equipment corporation,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: modules :: modulesAndOptions :: editedOptionModuleLst Apr83
Topics: jam, dlf, mas, jbc, mgr, bin, upd, continued, jew, ldlk, jam jam, mas mas, jbc jbc, dlf dlf, ldlk...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: handbooks :: Digital Logic Handbook 1967
Topics: input, output, pulse, converter, inputs, diode, digital, load, voltage, nsec, clamped load, pulse...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0128 CZTSHD0 TS11dataRel
Topics: mov, error, seq, pll, jsr, cmd, global, command, bne, endif, mov mov, global subroutines, count...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0133 CZTSCA0 TS11pt3
Topics: mov, trap, command, jsr, tssr, packet, test, data, ckloop, fatflg, selected trap, mov mov, packet...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: 1160 :: MAINDEC-11-DQKKA-A 1160cacheDiag mar77
Topics: mov, cache, error, test, address, parity, data, tag, hov, log, parity error, mov mov, cache...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp11 :: xxdp :: fiche 200dpi :: 0254 index 85-07
Topics: apr, oct, jul, feb, dec, sep, jun, aug, nov, tech man, number description, device number, device...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: pdp8 :: handbooks :: SmallComputerHandbook Mar67
Topics: program, data, instruction, memory, content, linc, flag, octal, address, core memory, data break,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: decus :: programCatalogs :: DECUS Catalog PDP-11 Aug78
Topics: program, source, media, operating, price, programs, memory, hardware, user, fortran, media price,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: engineering :: EL-ENGRS-OM-000 Engineering Orientation Manual Apr82
Topics: engineering, product, systems, software, digital, group, products, design, development,...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: disc :: ra82 :: MP01427 RA82 Jun86
Topics: servo, rev, data, clk, item, enable, document, assembly, sel, erm, parts list, document number, top...
From the bitsavers.org collection, a scanned-in computer-related document. dec :: disc :: ra81 :: MP01359 RA81 Oct82
Topics: servo, rev, aaa, item, clk, assembly, cer, document, drive, cont, parts list, servo control, top...