396:
27:
249:
237:
383:
334:
The initial PC 7300 model offered a modest 512 KB of memory and a small, low performance 10 MB hard drive. This model, although progressive in offering a Unix system for desktop office operation, was underpowered and produced considerable fan and drive bearing noise even when idling. The
384:
386:
387:
385:
833:
AUDIX Voice Power (“Speech
Processor”) card allowed for the capture and digital recording of voice conversations. This was an option of the "Integrated Solution" package for the
280:
At least 512 KB RAM on main board (1 MB or 2 MB were also options), expandable up to an additional 2 MB via expansion cards (4 MB max total)
788:
RAM could be added using 512 KB RAM or 2 MB RAM cards, up to a maximum of 4 MB (2 MB on the motherboard and 2 MB on expansion cards).
859:
Expansion chassis card was hard-wired to the externally-powered
Expansion Unit with five additional S4BUS slots (manufactured by Alloy Computer Products)
355:
67 MB hard drive. This cover change added a 'hump' to the case, expanded onboard memory to 1 or 2 MB, as well as added a better power supply.
1506:
1481:
1275:
228:. The system was tailored for use as a productivity tool in office environments and as an electronic communication center.
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1183:
339:
was innovative, and the machine gained notoriety appearing in numerous movies and TV shows as the token "computer".
902:
Three prototypes of a follow-on "P6" model were alleged to have been built with the specifications claimed to be:
1516:
411:
224:, and often dubbed the "3B1". Despite the latter name, the system had little in common with AT&T's line of
1209:
703:
691:
468:
268:
1521:
564:
947:
217:
1432:
1511:
1526:
823:
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1468:, article from BYTE magazine Volume 11 Number 05: Multiprocessing (May 1986), pp. 254–262
1462:, article from BYTE magazine Volume 10 Number 05: Multiprocessing (May 1985), pp. 98–106
1449:
1307:
1143:
1255:
777:
math co-processor. Mouse, floppy, modem (on COM1), and printer are shared in a DOS session.
827:
169:
1087:
8:
1402:
791:
EIA/RAM combo cards contained extra RAM (512 KB, 1 MB, or 1.5 MB) and two
225:
1236:
220:
in the mid- to late-1980s. The system was codenamed "Safari 4" and is also known as the
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1168:
805:
657:
484:
937:
707:
626:
173:
1465:
1459:
819:
205:
101:
1486:
957:
713:
533:
479:
371:
351: (equivalent to $ 24,100 in 2023). The cover was redesigned to accommodate a
912:
906:
834:
587:
417:
Windowing software (xt/layers) from SVR3 was provided to allow connection to a
258:
124:
1500:
414:, System V Release 3 and Convergent Technologies. The last release was 3.51.
407:
317:
766:
739:
710:
which are otherwise not available without installing the
Ethernet software)
336:
798:
Dual EIA port card (same card as the EIA/RAM but without the RAM sockets)
352:
311:
89:
847:
778:
763:
747:
518:
Business
Graphics (produces chart graphics from 20/20 spreadsheet data)
363:
Convergent
Technologies offered an S/50 which was a re-badged PC 7300.
293:
271:
151:
395:
347:
An enhanced model, "3B/1", was introduced in
October 1985 starting at
1453:
1260:
952:
887:
569:
286:
16 KB ROM (up to 32 KB ROM supported using 2x 27128 EPROMs)
1471:
773:-compatible, with 512 KB RAM, an RS-232 COM2 port and optional
1418:
1360:
843:
PC/PBX Connection
Package 4 for AT&T PBX System 75 or System 85
815:
758:
The UNIX PC has three proprietary S4BUS slots for expansion cards:
601:
527:
1388:
1169:"AT&T Introduces Computer Gear Aimed at IBM-Led Office Market"
801:
743:
724:
718:
641:
636:
494:
241:
26:
878:
repository provided by AT&T and accessible via dialup UUCP.
781:
was included. This board was designed and built for AT&T by
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261:(16-bit external bus, 32-bit internal) with custom, discrete
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774:
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681:
474:
444:
274:, originally 10 MB, later models with up to 67 MB
202:
111:
107:
1318:
248:
236:
733:
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released the "Olivetti AT&T 3B1 Computer" in Europe.
140:
1491:
1184:"UNISYS Corp Puts Ely in Charge of $ 2,000m UNIX Group"
1137:
1135:
1133:
1131:
846:
Floppy Tape card provided interface for 23 MB MFM
299:
Monochrome green phosphor 12-inch (300 mm) monitor
150:
10 MB, Optional 20 MB, 40 MB, and 67 MB
1129:
1127:
1125:
1123:
1121:
1119:
1117:
1115:
1113:
1111:
804:
1 Mbit/s (1BASE5) network over twisted-pair wire
862:
Piiceon Model SR-2048 (2 MB) RAM expansion card
840:
where the UNIX PC served as the "Master
Controller".
545:/AT&T Write Power 2 (word processor/spreadsheet)
1108:
1498:
1181:
1487:http://bitsavers.trailing-edge.com/pdf/att/3b1/
1081:
1079:
1077:
1075:
1276:"Vendors of Multiuser Microcomputer Products"
1073:
1071:
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1067:
1065:
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1059:
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983:
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979:
977:
975:
973:
410:Release 2, with extensions from 4.1 and 4.2
1336:"A Look at Software for AT&T's Unix PC"
554:Sound Presentations (presentation graphics)
1052:
252:Motorola 68010 in an AT&T 7300 UNIX PC
25:
970:
866:
399:AT&T PC 7300 compiling and running a
231:
183:RS-232 port, Parallel port, 3 phone jacks
1450:AT&T Leapfrogs IBM With the Unix PC.
1333:
1253:
424:
394:
381:
366:
247:
235:
76: (equivalent to $ 14,400 in 2023) -
1477:AT&T 3B1/7300 (UNIX PC) Information
558:
548:Samna Plus (word processor/spreadsheet)
512:
1507:Computer-related introductions in 1985
1499:
1264:. Vol. 7, no. 41. p. 8.
1182:CBR Staff Writer (December 13, 1988).
1141:
897:
730:SPICE/NUTMEG (circuit simulation tool)
1482:AT&T UNIX PC at old-computers.com
1308:"Samna Plans Unix-based Product Line"
1222:AT&T, Select Code 999-601-311IS,
1097:. No. May 1986. pp. 254–262
1088:"System Review: The AT&T UNIX PC"
918:SIMM sockets for up to 16 MB RAM
886:The FreeBee emulator is available at
80: (equivalent to $ 20,700 in 2023)
391:Video of an AT&T PC 7300 booting
1404:AT&T System 25 Reference Manual
1375:"Comp.sources.3b1 Archive Volume 1"
1294:"Olivetti Technical Specifications"
1254:Petrosky, Mary (October 14, 1985).
1210:"NEW AT&T COMPUTER OFFICE GEAR"
377:
13:
1216:
1212:. Chicago Tribune. March 27, 1985.
1144:"At Last, AT&T's 7300/Unix PC"
753:
575:
14:
1538:
1443:
1085:
406:The operating system is based on
335:modern-looking "wedge" design by
161:12 inches (30 cm), 720 x 348
1456:, April 15, 1985, pp. 15–17
1334:Satchell, Stephen (1985-09-23).
1256:"6300 Plus Launched By AT&T"
342:
1425:
1411:
1395:
1381:
1367:
1353:
1300:
1286:
1268:
1224:AT&T UNIX PC Owner's Manual
1190:. New Statesman Media Group Ltd
1247:
1229:
1202:
1175:
1161:
1:
963:
539:Paint Power (drawing package)
1314:. June 16, 1986. p. 17.
1142:Howitt, Doran (1984-04-08).
881:
850:(e.g. Cipher FloppyTape 525)
769:card running at 8 MHz,
277:Internal 5-1/4" floppy drive
218:AT&T Information Systems
7:
1466:The AT&T Unix PC Review
931:
551:SMART System (Office Suite)
16:1980s Unix desktop computer
10:
1543:
669:
329:
818:10 Mbit/s LAN card (
187:
179:
165:
157:
146:
139:512 KB to 4 MB
135:
118:
100:
84:
69:
54:
46:
36:
24:
1389:"Miscellaneous Software"
856:-02 card for tape backup
608:
302:Internal 300/1200 bit/s
208:originally developed by
58:March 26, 1985
943:Convergent Technologies
783:Alloy Computer Products
581:AT&T Word Processor
358:
322:3 S4BUS expansion slots
210:Convergent Technologies
191:40 lb (18 kg)
41:Convergent Technologies
20:UNIX PC / PC 7300 / 3B1
1433:"SVR3.5 + source code"
1086:Mayer, Alastair J. W.
876:public domain software
867:Public domain software
403:
392:
253:
245:
232:Hardware configuration
131:clocked at 10 MHz
1517:Computer workstations
1492:http://www.unixpc.org
1241:Starring the Computer
425:Programming languages
398:
390:
367:Olivetti AT&T 3B1
251:
239:
50:Professional Computer
1460:The AT&T Unix PC
848:Tape Cartridge Drive
830:TCP/IP stack/drivers
595:SMART Word Processor
565:20/20 (Supercomp 20)
559:Spreadsheet software
513:Application software
461:LPI DEBUG (debugger)
289:2 KB SRAM (for
1522:68k-based computers
927:60 MB QIC tape
898:Cancelled successor
570:Microsoft Multiplan
421:graphics terminal.
226:3B series computers
216:), and marketed by
212:(later acquired by
21:
1512:AT&T computers
1237:"AT&T PC 7300"
938:AT&T 6300 Plus
835:AT&T System 25
808:typically used in
806:local area network
785:of Framingham, MA.
404:
393:
254:
246:
70:Introductory price
19:
1407:. September 1989.
771:Hercules graphics
719:MGR window system
388:
195:
194:
1534:
1527:32-bit computers
1472:comp.sys.3b1 FAQ
1437:
1436:
1429:
1423:
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1415:
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1347:
1342:. pp. 32–33
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1031:
948:DEC Professional
738:Various Shells:
389:
378:Operating system
350:
240:Exterior of the
206:desktop computer
199:AT&T UNIX PC
110:v3.51 (Based on
102:Operating system
79:
75:
65:
63:
31:AT&T UNIX PC
29:
22:
18:
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1033:
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971:
966:
958:IBM System 9000
934:
924:2400 baud modem
900:
884:
869:
756:
754:Expansion cards
672:
658:Super-Rogue 9.0
611:
578:
576:Word processors
561:
515:
480:Microsoft BASIC
427:
382:
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369:
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348:
345:
332:
283:32 KB VRAM
234:
77:
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32:
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1444:External links
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913:Motorola 68881
909:
907:Motorola 68020
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844:
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826:connector and
822:-based) using
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588:Microsoft Word
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584:Crystal Writer
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430:AT&T BASIC
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259:Motorola 68010
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125:Motorola 68010
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1282:. 1986-10-13.
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921:Color monitor
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797:
795:serial ports.
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408:Unix System V
402:
397:
375:
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364:
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343:AT&T 3B/1
340:
338:
325:3 phone jacks
324:
321:
319:
318:parallel port
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28:
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1403:
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1383:
1369:
1355:
1344:. Retrieved
1339:
1311:
1302:
1288:
1279:
1270:
1259:
1249:
1240:
1231:
1223:
1218:
1204:
1194:November 29,
1192:. Retrieved
1188:Tech Monitor
1187:
1177:
1163:
1152:. Retrieved
1150:. p. 17
1147:
1099:. Retrieved
1094:
1042:. Retrieved
1038:
901:
885:
871:
870:
809:
767:co-processor
757:
690:(implements
680:HoneyDanBer
416:
405:
370:
362:
346:
337:Mike Nuttall
333:
257:10 MHz
221:
198:
196:
180:Connectivity
127:with custom
90:floppy disks
55:Release date
37:Manufacturer
1419:"The STORE"
1296:. Olivetti.
694:, built-in
505:SVS Fortran
464:LPI Fortran
353:full-height
316:Centronics
312:serial port
172:, 3-button
152:hard drives
92:, optional
1501:Categories
1346:2019-07-30
1154:2019-08-01
1101:2019-08-01
1039:unixpc.org
964:References
872:The STORE!
828:Wollongong
779:MS-DOS 3.1
592:Samna Word
508:SVS Pascal
294:page table
272:hard drive
62:1985-03-26
1454:InfoWorld
1340:Infoworld
1312:InfoWorld
1280:Infoworld
1261:InfoWorld
1148:Infoworld
1035:"3b1 FAQ"
953:IBM RT PC
911:Optional
882:Emulation
820:AMD Lance
652:Asteroids
524:III (DBM)
401:C program
349:US$ 8,495
267:Internal
106:AT&T
78:US$ 7,290
74:US$ 5,095
1044:1 August
932:See also
816:Ethernet
623:Mahjongg
617:Klondike
602:WordStar
598:WordMarc
528:Informix
419:DMD 5620
372:Olivetti
242:AT&T
170:Keyboard
88:5¼-inch
1361:"Games"
888:FreeBee
802:StarLAN
762:DOS-73
725:ProComm
723:Pcomm (
684:package
670:Utility
650:Rocks (
642:Pac-Man
637:NetHack
495:Fortran
440:GNU C++
330:PC 7300
222:PC 7300
158:Display
147:Storage
60: (
1226:(1986)
892:GitHub
874:was a
812:format
793:RS-232
746:, and
740:Bourne
727:clone)
714:Kermit
708:finger
700:telnet
663:Tetris
654:clone)
647:Robots
534:Oracle
469:Pascal
309:RS-232
214:Unisys
136:Memory
1091:(PDF)
676:EMACS
665:clone
644:clone
632:Moria
614:Chess
609:Games
543:Samna
536:(DBM)
530:(DBM)
522:dBASE
501:BASIC
489:COBOL
457:COBOL
434:dBase
304:modem
201:is a
174:Mouse
166:Input
96:tapes
85:Media
1196:2021
1095:Byte
1046:2019
810:star
775:8087
764:8086
748:Korn
704:SMTP
692:SLIP
688:KA9Q
682:UUCP
627:Larn
620:Life
604:2000
499:SMC
475:PL/I
473:LPI
467:LPI
455:LPI
449:LPI
445:LISP
359:S/50
203:Unix
197:The
188:Mass
112:SVR2
108:UNIX
47:Type
915:FPU
890:on
854:QIC
838:PBX
824:AUI
734:TeX
696:FTP
493:RM/
436:III
412:BSD
291:MMU
269:MFM
263:MMU
244:3B1
141:RAM
129:MMU
120:CPU
94:QIC
1503::
1452:,
1338:.
1320:^
1310:.
1278:.
1258:.
1239:.
1186:.
1146:.
1110:^
1093:.
1054:^
1037:.
972:^
894:.
742:,
706:,
702:,
698:,
485:RM
1435:.
1421:.
1391:.
1377:.
1363:.
1349:.
1243:.
1198:.
1171:.
1157:.
1104:.
1048:.
744:C
487:/
451:C
296:)
114:)
64:)
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