36:
27:
207:") to the TCM with an array of 11 Ă— 11 solder pads. The TCM contains 33 metalized layers which distribute signals and power. "A module is connected to the next level of packaging through 1800 pins (1200 are available for signals, 500 pins are available for power, and 100 pins are spare)." (p. 7) The module is fitted with a
358:
3081 + 3081 with same serial number, but two on/off switches. In IBM's words: "four central processing units that can operate as a tightly coupled multiprocessor or as two independent "dyadic" configurations" - IBM didn't announce it as a Quad, just two
Dyadics
287:
The 3084 could run in two different modes. When running in PP-mode (Partial
Processing), it was configured as two independent systems. The other mode was called SI-mode (Single Image), then all four processors were running as one system.
283:
While all 3081/3083 shared the same physical footprint, the 3084 system doubled this setup, the CPU was double in length, two 3082, and two 3087 was used. For systems using the optional 3089, two units were required.
276:
Announced
September 3, 1982 and withdrawn August 4, 1987. It could be configured with 32, 48 or 64 million bytes of main memory. Later on the 3084X could have up to 128 MB of storage. The 3084 was a 14 MIPS machine.
142:
All models of 3081 and 3083 had the same size, components and footprint; the CPU itself (3081 or 3083), the service processor that also contained the channels (3082), and the water pump/coolant unit (3087).
130:
The 3081D was announced Nov 12, 1980; the 3081K came nearly a year later; the 3081G was introduced
September 3, 1982 as part of the initial 3084 announcement. The 3081G was replacing the 3081D models.
146:
The 308X Processor
Complex was using 400 Hz power, this could be supplied by either an optional motor/generator unit (3089), or it could be supplied by an external power source.
112:(S/370-XA) required by the new MVS/SP V2 and the Start Interpretive Execution (SIE) instruction used by the new Virtual Machine/eXtended Architecture Migration Aid (VM/XA MA).
133:"The IBM 3081 Processor Complex offers flexible growth steps in the 308X family of processors, between the 3083 Model Groups C, E, B and J over 3081G and 3081K to the 3084."
211:-filled metal cap, which contains one piston per chip; the piston presses against the back of each chip to provide a heat conduction path from the chip to the cap. A
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was described by an IBMer as "never intended to be built," adding that the 308X was to only be the 3081 and 3084, and that the 3083 was aimed at "the
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chips (which were not compatible with the TTL chips sold on the open market by many manufacturers) were joined face-down (sometimes called "
166:, using up to 704 logic circuits per chip, which provided the required performance, reliability, and serviceability that were design goals
215:
cold plate is attached to the cap; the water temperature is approximately 24 °C. This arrangement provides cooling of the module
952:
648:
Pittler, M. S.; Powers, D. M.; Schnabel, D. L. (1982). "System
Development and Technology Aspects of the IBM 3081 Processor Complex".
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714:
105:
Later models in the series were the 3083 and the 3084. The 3083 was announced March 31 and the 3084 on
September 3, both in 1982.
1036:
460:
331:
IBM used a capital X when referring to 308X, as did others needing an official reference; see the
Congressional Record reference.
264:
The 3083 Models J and JX have an instruction execution rate ranging from 1.8 to 2.0 times the 3083 Models E and EX, respectively.
261:
The 3083 Models B and BX have an instruction execution rate ranging from 1.4 to 1.5 times the 3083 Models E and EX, respectively.
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239:
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The 3081 was "two processors in a single box ... it was not possible to partition it and run it as two independent machines."
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280:"The 3084 was two 3081 tied together to make a 4-way SMP." ("that can operate .. as two independent" dual-processors)(
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Of the various 3083 models listed by IBM in their announcement, the CX has the slowest instruction execution rate.
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All three 308X systems, which IBM had marketed as "System/370-Compatibles," were withdrawn August 4, 1987.
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machine. The next offering, the 3081K, was a 7 MIPS machine. Last came the 3081G, again a 5 MIPS machine.
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on the order of 10 watts per square meter, which is about a tenfold increase over the 3033 processor.
172:
Water cooling, which provides heat removal from chips beyond the ability of conventional air cooling
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Some key technological features of the 3081, compared to the previous most powerful processor, the
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102:, was introduced November 12, 1980. It consisted of a 3081 Processor Unit with supporting units.
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The 3083 Model CX has an instruction execution rate of about 0.75 times that of a 3083 Model EX.
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199:(TCM), a flat ceramic module containing about 30,000 logic circuits on up to 118 chips. The
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Next in speed are the E and EX, followed by B and BX. The J and JX are the fastest 3083s.
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Reduced power consumption, 23 kilowatts for a 3081-D16 versus 68 kilowatts for a 3033-U16
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The elimination of a layer of packaging was achieved through the development of the
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620:"IBM 9020 computers used by FAA (was Re: EPO stories (was: HELP IT'S HOT!!!!!))"
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Collectively, the fastest is 2.667 times the performance of the slowest.
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26:
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A machine cycle time of 26 nanoseconds (38 MHz equivalent CPU)
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567:"IBM Archives: System/370-Compatibles Dates and characteristics"
169:"Elimination of one complete level of packaging, the card level"
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Approximately double the instruction-execution rate of the 3033
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89:
50:
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The dyadic concept offers "under the cover" dual processors.
462:
IBM System/370 Extended
Architecture Principles of Operation
515:
494:(Announcement letter). October 21, 1981. LTR ENUS283-042
192:(as many as 24), and main memory (up to 32 megabytes).
541:"Virtual Machine/eXtended Architecture Migration Aid"
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222:The internal code name of the 3081 was Adirondack.
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45:
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547:(Announcement letter). October 21, 1981. ZP81-0811
16:Series of IBM mainframe computer models from 1980s
468:(Second ed.). IBM. January 1987. SA22-7085-1
521:(First ed.). IBM. January 1984. SA22-7095-0
73:1980 for the 3081; 1982 for the 3083 & 3084
788:
721:— Chapter 9 (pp. 241–254) describes the 308X.
123:The initial 3081 offered, the 3081D, was a 5
49:International Business Machines Corporation (
8:
19:
349:range of relative performance = 2.0 / 0.75
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588:. IBM (marketing brochure). Archived from
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1042:PC-based IBM mainframe-compatible systems
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488:"IBM Large Systems Announcement Overview"
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705:IBM Mainframes: Architecture and Design
650:IBM Journal of Research and Development
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188:Both central processors have access to
1007:Basic Assembly Language and successors
445:. IBM. 23 January 2003. Archived from
416:. IBM. 23 January 2003. Archived from
162:About 800,000 circuits implemented in
7:
678:. FAS. July 12, 1989. p. H3666
14:
569:. 23 January 2003. Archived from
391:. 23 January 2003. Archived from
108:The IBM 308X line introduced the
1037:Language for Systems Development
242:market" which wanted a "fast...
184:Two central processor components
110:System/370 Extended Architecture
98:, of which the first model, the
34:
25:
958:2540 punched-card reader–writer
948:270x communications controllers
953:3705 Communications Controller
254:IBM's information sheet says:
1:
1116:IBM System/360 mainframe line
100:Model 3081 Processor Complex
1137:
1027:Hexadecimal floating-point
1055:
618:Anne & Lynn Wheeler.
197:Thermal Conduction Module
150:3081 as successor to 3033
81:August 4, 1987 (all 308X)
33:
24:
586:"3081 Processor Complex"
439:"3084 Processor Complex"
410:"3083 Processor Complex"
381:"3081 Processor Complex"
164:large scale integration
1090:IBM zEnterprise System
974:DOS/360 and successors
676:"Congressional Record"
628:alt.folklore.computers
158:, were the following:
979:OS/360 and successors
701:Prasad, N.S. (1989).
449:on December 15, 2004.
395:on December 26, 2004.
592:on December 26, 2004
573:on January 16, 2005.
1047:Program status word
662:10.1147/rd.261.0002
96:mainframe computers
21:
766:2017-01-16 at the
754:2017-01-16 at the
742:2017-01-13 at the
420:on March 11, 2005.
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590:the original
584:IBM (1982).
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571:the original
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549:. Retrieved
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523:. Retrieved
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498:November 17,
496:. Retrieved
491:
482:
470:. Retrieved
461:
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447:the original
443:IBM Archives
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418:the original
414:IBM Archives
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393:the original
385:IBM Archives
384:
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88:
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78:Discontinued
70:Release date
46:Manufacturer
1075:IBM zSeries
1017:Channel I/O
1012:Bus and Tag
941:Peripherals
928:9370 models
923:43xx models
902:308X series
897:303X series
890:(1977–1990)
820:(1970–1977)
656:(1): 2–11.
551:October 27,
525:October 27,
472:October 27,
1110:Categories
1085:System z10
1065:System/370
1060:System/360
818:System/370
367:References
340:32Ă—2 bytes
1080:System z9
877:Model 195
872:Model 168
867:Model 165
862:Model 158
857:Model 155
852:Model 148
847:Model 145
842:Model 138
837:Model 135
832:Model 125
827:Model 115
624:Newsgroup
359:(twins)."
217:heat flux
205:flip chip
1032:Hercules
967:Software
764:Archived
761:IBM 3084
752:Archived
749:IBM 3083
740:Archived
737:IBM 3081
313:IBM 3090
308:IBM 303X
292:See also
272:IBM 3084
232:IBM 3083
226:IBM 3083
190:channels
119:IBM 3081
65:IBM 3084
63:IBM 3083
61:IBM 3081
40:IBM 3081
20:IBM 308X
1000:Related
991:TSS/370
916:Low-end
626::
1022:ES EVM
984:OS/VS1
811:Models
731:Photos
713:
209:helium
1095:IBM Z
519:(PDF)
466:(PDF)
319:Notes
907:3090
887:30XX
711:ISBN
684:2008
598:2008
553:2022
527:2022
500:2022
474:2022
230:The
156:3033
125:MIPS
92:308X
87:The
658:doi
545:IBM
492:IBM
389:IBM
246:."
240:TPF
236:ACP
201:TTL
90:IBM
51:IBM
1112::
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238:/
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