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range. Confusion persisted about the nature of ARX amongst the wider public and press, with some believing that ARX was Acorn's own Unix variant, with this view being refined in time to accommodate ARX as Acorn's own attempt to deliver a "UNIX look-alike" whose development had been abandoned in
542:
Holgate, Chris; Davison, Rob; Burke, Stephen; Given, David; Harris, Ben; Kendrick, Rob; Bracey, Kevin; Fenelon, Pete; Blunt, Terry; druck; Markettos, Theo; Kossow, Al; Zuschlag, Jesper; Barclay, Alan; Crocker, Stephen; Pampling, Steven; et al.
213:
According to the project
Application Manager Richard Cownie, during the project, while Acorn was developing the kernel, it used the C and Acorn Modula Execution Library (CAMEL) in the Acorn Extended Modula-2 (AEM2) compiler (ported from
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271:, which led to the introduction of the SWP instruction to the instruction set of the ARMv2a version of the ARM processor. It had support of a file system for optical (
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It was not finished in time to be used in the Acorn
Archimedes range of computers, which shipped in 1987 with an operating system named Arthur, later renamed
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to the
Archimedes, David Chase developed a compiler based on AEM2 for the programming language
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275:(WORM)) disks and featured a window system, a window toolkit (and a direct manipulation
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favour of a traditional Unix version for the
Archimedes, which ultimately emerged as
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Usenet post to comp.sys.acorn detailing the relationship between ARX and Modula-2
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History of the addition of the SWP instruction to the ARM3 instruction set
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hardware). Though never released externally, CAMEL was ported to use on
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and as a result suffered performance problems due to switches into
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A set of Usenet posts detailing why ARX was abandoned for RISC OS.
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283:-based text editor, for enriched documents written in
459:"An extensible programming environment for Modula-3"
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291:precursor). The OS had to be fitted in a 512
16:Operating system developed by Acorn Computers Ltd
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2876:Category: Microkernel-based operating systems
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8:
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229:Unix computers. In an effort to port Sun's
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332:The Acorn Research Centre was acquired by
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386:"Chris's Acorns: Acorn A500 (prototype)"
357:
190:—which purchased Acorn—for Acorn's new
182:Ltd in the Acorn Research Centre (ARC)
7:
1573:
74:Low cost paperless office computing
2923:Microkernel-based operating systems
466:SIGSOFT Software Engineering Notes
14:
2908:Acorn Computers operating systems
2880:
2879:
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1572:
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199:reduced instruction set computer
194:personal computers based on the
1559:indicate discontinued systems.
302:. This suggests that ARX had a
2918:Discontinued operating systems
549:Neil Franklin's Usenet Archive
1:
602:. September 1988. p. 44
2130:Multi-Environment Real-Time
1544:Windows Subsystem for Linux
576:. February 1988. p. 50
317:(MOS) from Acorn's earlier
313:, derived from the earlier
2944:
407:"Aha—what about Modula-2?"
366:"Acorn History (untitled)"
2842:
1635:
1552:
1538:Windows Services for UNIX
1493:Microsoft POSIX subsystem
1032:
523:"Full Acorn Machine List"
498:"Brian T. Lewis - Resume"
125:and special keyboard keys
596:"PC Emulator and Arthur"
545:"Not A RISC By Thursday"
315:Machine Operating System
259:. Much of the OS ran in
123:Graphical user interface
203:central processing unit
2886:Category: Microkernels
438:"David Chase (resume)"
2913:ARM operating systems
1532:UserLAnd Technologies
457:Jordan, Mick (1990).
2865:Open-source software
2372:Java virtual machine
1527:UNIX System Services
1026:compatibility layers
843:8-bit microcomputers
834:Derivatives, clones,
279:(UI) editor) and an
273:write once read many
2824:Andrew S. Tanenbaum
1254:Other distributions
478:10.1145/99278.99285
24:
570:"Fact or fantasy?"
186:(UK) and later by
167:was an unreleased
2895:
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2809:James G. Mitchell
2794:Per Brinch Hansen
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1937:
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1854:Mac OS nanokernel
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1629:operating systems
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1022:operating systems
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900:RiscStation R7500
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767:Business Computer
673:Operating systems
405:Bruce, Cockburn.
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2247:Capability-based
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850:Prodest PC 128 S
840:
816:Network Computer
791:Archimedes range
723:
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500:. Archived from
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424:TOP3 smart moves
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296:read-only memory
257:operating system
227:Sun Microsystems
196:ARM architecture
172:operating system
155:Arthur, renamed
71:Marketing target
25:
19:Operating system
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2779:Thomas Bushnell
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666:Acorn Computers
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180:Acorn Computers
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34:Acorn Computers
20:
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5:
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2850:= discontinued
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2819:Richard Rashid
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2535:Icaros Desktop
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2461:Classic Mac OS
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2306:HarmonyOS NEXT
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2019:
2012:
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2004:Off++ → Plan B
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879:BeagleBoard-xM
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741:Systems 2 to 5
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728:microcomputers
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619:External links
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436:Chase, David.
428:
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377:
356:
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306:-type design.
277:user interface
253:multithreading
210:
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184:United Kingdom
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118:user interface
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2829:Avie Tevanian
2827:
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2799:Gernot Heiser
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1444:Compatibility
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1412:Research Unix
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1403:BlackBerry 10
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1117:DragonFly BSD
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736:Microcomputer
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504:on 2004-05-01
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63:Working state
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43:
39:
35:
32:
30:
26:
2928:Microkernels
2884:
2874:
2862:
2854:
2849:
2846:
2834:William Wulf
2708:
2702:
2696:
2688:
2675:
2625:
2617:
2604:Workplace OS
2602:
2595:
2591:
2584:AIM alliance
2571:
2489:
2483:
2459:
2452:
2437:
2430:
2399:
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2254:
2214:Nucleus RTOS
2199:
2182:
2175:
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2144:
2138:
2134:
2128:
2120:
2093:
2086:
2074:
2073:
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2014:
2007:
1997:
1984:
1968:
1957:
1949:
1941:
1926:
1907:
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1785:Microkernels
1743:Workplace OS
1639:
1577:
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1083:
1082:
1037:Architecture
959:Raspberry Pi
762:Communicator
689:
625:ARX features
604:. Retrieved
599:
590:
578:. Retrieved
573:
564:
552:. Retrieved
548:
537:
526:. Retrieved
517:
506:. Retrieved
502:the original
492:
481:. Retrieved
472:(6): 66–76.
469:
465:
452:
441:. Retrieved
431:
400:
389:. Retrieved
380:
369:. Retrieved
360:
331:
308:
249:multitasking
243:
231:workstations
221:(ETH) using
212:
164:
163:
152:Succeeded by
83:Available in
66:Discontinued
2774:Gordon Bell
2664:OpenComRTOS
2561:Singularity
2387:Chorus/Jazz
2310:OpenHarmony
1789:nanokernels
1733:Taligent OS
1500:MKS Toolkit
1311:OpenSolaris
934:BeagleBoard
836:compatibles
811:Set-Top Box
304:microkernel
281:Interscript
267:to perform
265:kernel mode
174:written in
142:Preceded by
136:Proprietary
109:Microkernel
76:workstation
2902:Categories
2766:Developers
2733:Frameworks
2670:Phantom OS
2634:ChibiOS/RT
1992:µ-velOSity
1986:MicroEmpix
1738:UNICOS MAX
1716:Tru64 UNIX
1521:PWS/VSE-AF
1418:SerenityOS
1325:Tru64 UNIX
1300:OpenServer
1052:Philosophy
1042:Filesystem
964:Touch Book
954:PandaBoard
939:DevKit8000
926:dev boards
859:32-bit PCs
772:BBC Master
554:2020-02-07
528:2010-12-27
508:2010-12-26
483:2009-09-08
443:2015-10-25
391:2022-12-19
371:2010-12-26
352:References
285:Interpress
246:preemptive
244:ARX was a
219:ETH Zurich
192:Archimedes
42:Written in
2857:Real-time
2814:Ike Nassi
2789:Dan Dodge
2553:Microsoft
2423:Unix-like
2413:Macintosh
2321:HarmonyOS
2208:Integrity
2107:Minix-vmd
2067:Unix-like
2046:Operating
1844:Macintosh
1626:Mach-like
1356:Domain/OS
1072:Operating
1019:Unix-like
881:in Kiste)
751:BBC Micro
719:Computers
680:Acorn MOS
600:RISC User
322:BBC Micro
300:ROM image
261:user mode
176:Modula-2+
169:Mach-like
92:Platforms
57:Unix-like
53:OS family
47:Modula-2+
29:Developer
2640:FreeRTOS
2597:Taligent
2529:Broadway
2523:AspireOS
2393:ChorusOS
2314:Oniro OS
2201:ChorusOS
2081:GNU Hurd
2035:Vanguard
1977:GNU Mach
1861:NuKernel
1706:NeXTSTEP
1694:Rhapsody
1567:Category
1514:P.I.P.S.
1350:Coherent
1332:UnixWare
1266:System V
1219:ChromeOS
1174:NeXTSTEP
1159:bridgeOS
1057:Security
915:Titanium
870:ARMini (
757:Electron
753:(Proton)
606:30 April
580:30 April
340:See also
334:Olivetti
239:Modula-3
216:Modula-2
209:Overview
205:(CPUs).
188:Olivetti
2847:Italics
2756:TI-RTOS
2704:Harmony
2683:SharpOS
2677:RC 4000
2646:HelenOS
2566:ThreadX
2543:MorphOS
2512:AmigaOS
2491:Symbian
2468:kernel)
2466:PowerPC
2454:Copland
2439:MacMach
2432:MachTen
2193:Partial
2139:Unix-RT
2122:MkLinux
2113:Minix 3
2059:support
2048:systems
2022:RTLinux
2016:PowerUP
1999:nucleus
1797:Kernels
1701:MkLinux
1645:Copland
1579:Commons
1557:Italics
1486:MachTen
1479:Interix
1459:Darling
1430:more...
1317:Illumos
1305:Solaris
1239:Red Hat
1209:Android
1154:watchOS
1139:audioOS
1112:OpenBSD
1102:FreeBSD
1074:systems
1047:History
949:Pandora
924:32-bit
801:Risc PC
781:32-bit
705:Galileo
700:RISC OS
695:RISC iX
574:Archive
346:RISC iX
327:RISC iX
311:RISC OS
269:mutexes
201:(RISC)
157:RISC OS
131:License
116:Default
87:English
2750:Genode
2744:Cosmos
2722:Zephyr
2627:BeRTOS
2619:Amoeba
2415:hosted
2381:JavaOS
2361:Wombat
2354:REX OS
2347:PikeOS
2341:LLinux
2334:kernel
2292:Midori
2273:CapROS
2262:KeyKOS
2256:GNOSIS
2177:UNICOS
2165:Spring
2146:OS2000
2095:MeikOS
1928:WarpOS
1915:ExecSG
1846:hosted
1808:family
1728:Spring
1689:Darwin
1672:iPadOS
1465:Eunice
1454:Cygwin
1446:layers
1373:LynxOS
1249:Ubuntu
1234:Gentoo
1229:Fedora
1224:Debian
1188:Ultrix
1144:iPadOS
1124:Darwin
1107:NetBSD
1096:386BSD
944:IGEPv2
910:Iyonix
866:A9home
821:Phoebe
726:8-bit
298:(ROM)
223:Econet
103:Kernel
2698:Thoth
2652:µC/OS
2573:Verve
2505:-type
2503:Amiga
2477:Psion
2299:NLTSS
2279:Hydra
2220:NuttX
2171:Tinix
2158:Redox
2101:Minix
2088:Lites
2057:POSIX
1943:ADEOS
1922:Quark
1901:-type
1899:Amiga
1872:Psion
1816:Eumel
1711:OSF/1
1684:macOS
1679:Lites
1424:Xenix
1391:OSF/1
1378:Minix
1342:Other
1288:HP-UX
1200:Linux
1181:SunOS
1167:DYNIX
1129:macOS
1062:Shell
969:i.MX6
885:Omega
877:BIK (
806:A7000
685:Panos
462:(PDF)
319:8-bit
2863:° =
2855:^ =
2737:kits
2716:VRTX
2707:^ →
2701:^ →
2690:SPIN
2592:Pink
2517:AROS
2485:EPOC
2285:seL4
2268:EROS
2232:RIOT
2184:VSTa
2135:MERT
2009:Opus
1970:Mach
1951:EROS
1909:Exec
1887:EKA2
1881:EKA1
1833:OKL4
1723:SPIN
1660:Mach
1655:Hurd
1624:and
1622:Mach
1507:PASE
1366:Hurd
1294:IRIX
1277:A/UX
1244:SUSE
1214:Arch
1149:tvOS
1024:and
1017:and
1015:Unix
895:Medi
890:Mico
746:Atom
710:NCOS
608:2021
582:2021
289:HTML
235:NeWS
233:Sun
105:type
36:Ltd.
2658:MQX
2226:OSE
2152:QNX
2133:^ (
2075:ARX
1959:K42
1667:iOS
1650:GNU
1640:ARX
1472:GNV
1397:QNX
1384:MOS
1361:GNU
1283:AIX
1134:iOS
1085:BSD
905:A75
783:PCs
690:ARX
474:doi
287:(a
165:ARX
146:MOS
96:ARM
23:ARX
2904::
2758:^°
2735:,
2724:^°
2672:^°
2654:^°
2642:^°
2636:^°
2630:^°
2601:→
2599:OS
2594:→
2519:°
2495:^°
2493:OS
2488:→
2401:JX
2396:^)
2363:^°
2343:^°
2332:L4
2318:→
2312:,
2287:^°
2271:→
2265:→
2259:→
2234:^°
2222:^°
2137:–
2103:°
2030:^°
1973:°
1954:^°
1890:^°
1884:→
1827:L4
1825:→
1822:L3
1819:→
1806:L4
796:A4
598:.
572:.
547:.
470:15
468:.
464:.
416:^
336:.
329:.
293:KB
251:,
241:.
2752:°
2746:°
2718:^
2710:V
2693:°
2685:°
2666:^
2660:^
2648:°
2622:°
2568:^
2537:°
2531:°
2525:°
2464:(
2404:°
2384:(
2357:^
2349:^
2316:)
2308:(
2228:^
2216:^
2210:^
2203:^
2160:°
2154:^
2141:)
2125:°
2115:°
2109:°
2083:°
2024:°
1994:^
1979:°
1962:°
1946:°
1835:°
1829:°
1787:-
1777:e
1770:t
1763:v
1614:e
1607:t
1600:v
1007:e
1000:t
993:v
874:)
658:e
651:t
644:v
610:.
584:.
557:.
531:.
511:.
486:.
476::
446:.
409:.
394:.
374:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.