25:
916:
926:
306:, and most of the firmware in the DEC 4000 AXP. For controlling the Futurebus+ and to interface the I/O module to the system bus, two IONIC ASICs are used. The Ethernet functionality in the I/O function is provided by the TGEC (Third Generation Ethernet Chip), also known as the DC253, while the SCSI/DSSI buses are provided by four
237:
The MS430 memory module has capacities of 32, 64, 128, 256 and 512 MB of memory. The memory is organised into four banks, each 280 bits wide, of which 256 bits are used to store data and 24 bits are used to store error detection and correction (EDC) information. The memory is protected by EDC logic,
345:
The BA640 cabinet has a width of 49.9 cm (20 in), a height of 88.3 cm (35 in) and a depth of 77.5 cm (31 in). It has a maximum weight of 124 kg (275 lb). The BA641 19-inch rackmountable enclosure has a width of 48.26 cm (19 in), a height of 44.4 cm (17.5 in) and a depth of 75.7 cm (29.8 in) with
255:
Located on the module are two CMIC ASICs which control the memory and interface the module to the system bus. Each CMIC ASIC is responsible for managing half of the 280-bit memory bus and the 128-bit system bus. The CMIC ASICs are fabricated in a CMOS process and are packaged in a 299-position
283:/SCSI buses and one Ethernet port. The second variant however only has half the bandwidth of the SCSI-2 buses of the first variant, although the advanced features of DSSI justified its use in some cases. Aside from these differences, the rest of the I/O module was essentially the same.
202:
Two models of CPU module were used in the DEC 4000 AXP, the KN430 (also known as the B2001-BA), used in the Model 600 Series, and the B2012-AA, used in the Model 700 Series. The KN430 contains a 160 MHz
271:
The DEC 4000 AXP uses the KFA40 I/O module, which contains the entire I/O subsystem. The I/O module is the largest module in the system, and two variants existed. The first variant offered four
321:
The DEC 4000 AXP has four fixed media mass storage compartments, each capable of holding one 5¼ inch or four 3½ inch devices. A single removable media mass storage compartment held the
218:
on the CPU module provide a number of functions, such as implementing the B-cache controller and the bus interface unit (BIU), which interfaces the microprocessor to the 128-bit
370:
Maskas, Barry A., Shirron, Stephen F. and
Warchol, Nicholas A. (1992). "Design and Performance of the DEC 4000 AXP Departmental Server Computing Systems",
955:
194:
modules, and in the storage backplane, were one to four fixed media mass storage compartments and one removable media mass storage compartment.
54:
337:
The DEC 4000 AXP systems used the
Futurebus+ Profile B for expansion, with six slots. These slots provided a peak transfer rate of 160 MB/s.
388:
379:
186:, a system backplane and a storage backplane. Plugged in the system backplane were one or two CPU modules, one to four memory modules, an
229:
system bus to enable communication between the CPU, memory and I/O modules. These ASICs were fabricated in a 0.8 micrometre process.
329:. In addition to internal storage, an external storage cabinet could be attached via an external SCSI port to provide more storage.
215:
929:
482:
263:
The memory module is the same size as the CPU module and connects to the backplane via two 129-pin and four 24-pin connectors.
313:
Most of the I/O devices are connected to the local I/O bus, known as the "Lbus", a 32-bit address and data multiplexed bus.
280:
214:), whereas the B2012-AA contains a 190 MHz DECchip 21064 with 4 MB of B-cache. Two C (Command, Control and Communication)
76:
47:
886:
960:
840:
491:
98:
286:
I/O module features common to both variants are an additional SCSI-2 bus for removable media drives only, a
870:
784:
249:
108:
101:
introduced on 10 November 1992. These systems formed part of the first generation of systems based on the
660:
166:
The possible values of 'x' is 1 or 2. These numbers specify the number of microprocessors in the system.
475:
162:: 190 MHz DECchip 21064 (EV4) processor(s) with 4 MB L2 cache each. It was introduced in October 1993.
965:
500:
175:
37:
242:
41:
33:
369:
950:
919:
741:
423:
178:(SMP) capable systems that are housed in either a BA640 half-height cabinet or a BA641 19-inch
58:
238:
which is capable of detecting and correcting 1-bit errors and common 2-, 3- and 4-bit errors.
901:
468:
407:
When applied to computer memory (RAM or cache) the quantities KB, MB and GB are defined as:
361:
891:
299:
245:
850:
460:
310:
SCSI/DSSI controllers and their associated DSSI drivers (second I/O module variant only).
8:
252:(DRAM) chips with capacities of 1, 4 and 16 Mb that reside on both sides of the module.
94:
799:
647:
619:
556:
518:
119:
896:
435:
When applied to communication rates the quantities KB, MB and GB are defined as:
383:
307:
303:
223:
365:, EK-KN430-TM. A01, First Printing, December 1992, Digital Equipment Corporation
789:
257:
207:
944:
845:
807:
865:
830:
637:
322:
187:
774:
860:
759:
711:
295:
226:
219:
204:
149:
126:
855:
779:
706:
326:
116:
822:
812:
716:
211:
191:
183:
179:
105:
731:
726:
721:
701:
696:
276:
764:
598:
586:
112:
346:
mounting brackets. It has a typical weight of 65.7 kg (146 lb).
691:
655:
632:
603:
593:
569:
546:
102:
769:
736:
627:
581:
576:
541:
536:
531:
526:
287:
564:
490:
439:
411:
291:
272:
751:
683:
125:
The DEC 4000 AXP was succeeded by the end of 1994 by the
451:
356:
358:, EK-KN430-SP. A01, Digital Equipment Corporation
111:, and at the time of introduction, ran Digital's
942:
389:AlphaServer comparison chart, March 1994 edition
46:but its sources remain unclear because it lacks
363:DEC 4000 AXP Model 600 Series Technical Manual
476:
279:ports, and the second variant offered four
152:(EV4) processor(s) with 1 MB L2 cache each.
483:
469:
137:There are two models of the DEC 4000 AXP:
77:Learn how and when to remove this message
290:85C30 Serial Communications Controller (
887:Compaq Professional Workstation 1000 XP
956:Computer-related introductions in 1992
943:
464:
925:
241:The memory is implemented using 280
129:2000 and 2100 departmental servers.
18:
13:
14:
977:
924:
915:
914:
232:
23:
841:DEC 7000 AXP and DEC 10000 AXP
429:
401:
169:
97:developed and manufactured by
1:
492:Digital Equipment Corporation
349:
340:
266:
197:
174:The DEC 4000 AXP are two-way
99:Digital Equipment Corporation
871:Digital Personal Workstation
785:Digital Personal Workstation
332:
250:dynamic random access memory
182:enclosure that contains two
93:is a series of departmental
7:
10:
982:
316:
16:Series of server computers
910:
879:
821:
798:
750:
682:
646:
618:
555:
517:
508:
499:
450:consistent with standard
372:Digital Technical Journal
176:symmetric multiprocessing
132:
394:
32:This article includes a
61:more precise citations.
742:VAX 7000 and VAX 10000
210:with 1 MB of B-cache (
961:Alpha-based computers
902:List of VAX computers
424:JEDEC memory standard
892:Itsy Pocket Computer
422:consistent with the
300:Dallas Semiconductor
294:) that provides two
246:dual in-line package
192:Futurebus+ Profile B
382:2011-06-07 at the
190:module, up to six
34:list of references
938:
937:
813:DECsystem servers
678:
677:
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120:operating systems
87:
86:
79:
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966:64-bit computers
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661:DEC Professional
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95:server computers
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57:this article by
48:inline citations
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897:Jupiter project
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447:1 GB = 1000 MB,
434:
430:
419:1 GB = 1024 MB,
406:
402:
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384:Wayback Machine
352:
343:
335:
319:
304:real-time clock
269:
260:(PGA) package.
243:surface mounted
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38:related reading
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444:1 MB = 1000 KB
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416:1 MB = 1024 KB
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275:buses and two
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258:pin grid array
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208:microprocessor
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67:September 2016
42:external links
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15:
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951:DEC computers
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846:DECpc AXP 150
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323:CD-ROM drives
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233:Memory module
230:
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217:
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209:
206:
205:DECchip 21064
195:
193:
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185:
181:
180:rackmountable
177:
167:
161:
158:, code named
157:
154:
151:
150:DECchip 21064
147:
144:, code named
143:
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139:
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128:
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121:
118:
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81:
78:
70:
60:
56:
50:
49:
43:
39:
35:
30:
21:
20:
866:AlphaStation
851:DEC 2000 AXP
836:DEC 4000 AXP
835:
831:DEC 3000 AXP
638:DECSYSTEM-20
438:1 KB = 1000
431:
410:1 KB = 1024
403:
374:
371:
362:
355:
344:
336:
320:
312:
296:serial lines
285:
270:
262:
254:
248:(DIP) 4-bit
240:
236:
201:
173:
165:
159:
155:
145:
141:
136:
124:
109:architecture
91:DEC 4000 AXP
90:
88:
73:
64:
53:Please help
45:
861:AlphaServer
760:Rainbow 100
327:tape drives
227:multiplexed
170:Description
127:AlphaServer
113:OpenVMS AXP
59:introducing
945:Categories
808:DECstation
775:DECstation
707:VAXstation
350:References
341:Enclosures
308:NCR 53C710
267:I/O module
198:CPU module
184:backplanes
148:: 160 MHz
717:VAXserver
494:computers
333:Expansion
156:Model 7x0
142:Model 6x0
117:OSF/1 AXP
106:Alpha AXP
920:Category
880:See also
732:VAX 9000
727:VAX 4000
722:VAX 6000
702:VAX 8000
697:MicroVAX
380:Archived
277:Ethernet
212:L2 cache
930:Commons
765:VAXmate
712:Firefly
599:DECmate
587:PDP-8/e
317:Storage
302:DS1287
220:address
55:improve
856:Multia
790:HiNote
780:Multia
692:VAX-11
656:PDP-11
648:16-bit
633:PDP-10
620:36-bit
604:PDP-14
594:PDP-12
570:LINC-8
557:12-bit
547:PDP-15
519:18-bit
454:usage.
273:SCSI-2
133:Models
103:64-bit
823:Alpha
770:DECpc
737:VAXft
628:PDP-6
582:PDP-8
577:PDP-5
542:PDP-9
537:PDP-7
532:PDP-4
527:PDP-1
395:Notes
288:Zilog
216:ASICs
146:Cobra
40:, or
800:MIPS
565:LINC
377:(4).
325:and
298:, a
292:UART
281:DSSI
224:data
222:and
160:Fang
89:The
752:x86
684:VAX
501:PDP
188:I/O
115:or
947::
452:SI
122:.
44:,
36:,
484:e
477:t
470:v
440:B
426:.
412:B
375:4
80:)
74:(
69:)
65:(
51:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.