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This 18-bit machine, first shipped in 1962, was a compromise: "with slower memory and different packaging" than the PDP-1, but priced at $ 65,000 - less than half the price of its predecessor. All later 18-bit PDP machines
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and non-removable - were an available option, but were not in the spirit of the “personal” or serially shared systems that DEC offered.
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The system's memory cycle is 8 microseconds, compared to 5 microseconds for the PDP-1.
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It was a one-pass assembler; paper-tape input did not have to be read twice.
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compiler. The assembler was different from that of the PDP-1 in two ways:
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207:, more powerful than, but based on the same concepts as, the 12-bit
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473:. A Fourth Survey of Domestic Electronic Digital Computing Systems.
385:
DIGITAL EQUIPMENT CORPORATION - Nineteen Fifty-Seven To The
Present
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280:, initially called "MicroTape", for both the PDP-1 and PDP-4.
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261:-based systems. The only use, if any, for IBM-compatible 200
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Bell, C. Gordon; Mudge, J. Craig; McNamara, John E. (2014).
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was for data. The use of "mass storage" drums - not even a
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Computer
Engineering: A DEC View of Hardware Systems Design
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740:
245:The PDP-4 weighs about 1,090 pounds (490 kg).
406:
437:
1052:
486:"Architectural Evolution in DEC's 18b Computers"
504:Brochure F-71 - "Programmed Data Processor - 7"
404:
16:1962 computer made by Digital Electronics Corp
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348:
378:
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276:It was in this setting that DEC introduced
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34:
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944:Compaq Professional Workstation 1000 XP
203:) are based on a similar, but enlarged
1076:Computer-related introductions in 1962
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510:. Digital Equipment Corporation. 1964.
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395:
391:. Digital Equipment Corporation. 1975.
108: (equivalent to $ 654,719 in 2023)
521:
477:
230:The PDP-4's console typewriter was a
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13:
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257:and the PDP-4 were introduced as
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898:DEC 7000 AXP and DEC 10000 AXP
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431:
342:
1:
549:Digital Equipment Corporation
467:"PROGRAMMED DATA PROCESSOR 4"
409:A History of Modern Computing
335:
176:Digital Equipment Corporation
58:Digital Equipment Corporation
1014:. You can help Knowledge by
928:Digital Personal Workstation
842:Digital Personal Workstation
465:Weik, Martin H. (Jan 1964).
238:reader and paper tape punch.
218:Approximately 54 were sold.
7:
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288:DEC provided an editor, an
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89:; 62 years ago
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144:1,090 pounds (490 kg)
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330:Programmed Data Processor
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174:was the successor to the
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68:Programmed Data Processor
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33:
24:
1071:Transistorized computers
405:Paul E. Ceruzzi (2012).
40:The PDP-4 on display at
44:'s auditorium stage in
1010:-related article is a
799:VAX 7000 and VAX 10000
349:Robert Slater (1989).
239:
959:List of VAX computers
234:ASR, with a built in
229:
949:Itsy Pocket Computer
352:Portraits in Silicon
304:were not supported.
21:
1081:Minicomputer stubs
300:Unlike the PDP-1,
240:
102:Introductory price
19:
1061:DEC minicomputers
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1022:
995:
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870:DECsystem servers
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232:Teletype Model 28
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1066:18-bit computers
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718:DEC Professional
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116:Approximately 54
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46:Washington, D.C.
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954:Jupiter project
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64:Product family
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903:DECpc AXP 150
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471:ed-thelen.org
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1016:expanding it
1008:minicomputer
1005:
997:
923:AlphaStation
908:DEC 2000 AXP
893:DEC 4000 AXP
888:DEC 3000 AXP
695:DECSYSTEM-20
588:
503:
497:
484:Bob Supnik.
479:
470:
460:
440:
433:
408:
384:
351:
344:
287:
275:
252:
249:Mass storage
244:
241:
217:
189:
171:
169:
84:Release date
78:Minicomputer
918:AlphaServer
817:Rainbow 100
265:or 556 BPI
149:Predecessor
1055:Categories
865:DECstation
832:DECstation
764:VAXstation
413:. p.
366:0262691310
355:. p.
336:References
294:FORTRAN II
259:paper tape
236:paper tape
136:DEC 18-bit
125:Paper tape
113:Units sold
106:US$ 65,000
774:VAXserver
551:computers
290:assembler
253:Both the
215:series.
159:Successor
54:Developer
977:Category
937:See also
789:VAX 9000
784:VAX 4000
779:VAX 6000
759:VAX 8000
754:MicroVAX
324:See also
292:, and a
284:Software
271:megabyte
222:Hardware
132:Platform
987:Commons
822:VAXmate
769:Firefly
656:DECmate
644:PDP-8/e
278:DECtape
186:History
92: (
913:Multia
847:HiNote
837:Multia
749:VAX-11
713:PDP-11
705:16-bit
690:PDP-10
677:36-bit
661:PDP-14
651:PDP-12
627:LINC-8
614:12-bit
604:PDP-15
576:18-bit
448:
421:
363:
312:Photos
302:macros
48:, 1964
1006:This
880:Alpha
827:DECpc
794:VAXft
685:PDP-6
639:PDP-8
634:PDP-5
599:PDP-9
594:PDP-7
589:PDP-4
584:PDP-1
508:(PDF)
489:(PDF)
389:(PDF)
318:PDP-4
255:PDP-1
213:PDP-8
209:PDP-5
180:PDP-1
172:PDP-4
163:PDP-7
153:PDP-1
121:Media
20:PDP-4
1012:stub
857:MIPS
622:LINC
446:ISBN
419:ISBN
361:ISBN
199:and
170:The
141:Mass
94:1962
87:1962
74:Type
42:NARA
809:x86
741:VAX
558:PDP
415:209
357:210
263:BPI
178:'s
1057::
469:.
444:.
417:.
397:^
375:^
359:.
201:15
195:,
182:.
1043:e
1036:t
1029:v
1018:.
541:e
534:t
527:v
491:.
454:.
427:.
369:.
211:/
197:9
193:7
191:(
96:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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