523:
753:
accepting a static RAM card acting as a cache or shared memory. The Hydra card provided arbitration logic to manage the multiprocessor functionality, avoiding the need for each processor card to have such logic (as was the case with the 486 processor card which had an ASIC for this purpose), thus providing the hardware basis of a multiprocessing solution for the Risc PC. Simtec were considering Taos and Helios as potential operating systems to make use of the card.
515:
2159:
249:
258:
76:
792:
the OmniBus
Workstation, and a customised version of the A7000+ built into a 19-inch rack mount unit, known as the OmniBus Interface Unit, were used to control/automate multiple television broadcast devices from other manufacturers in a way that was unusual at the time. In 2002, OmniBus products were "in constant use worldwide at nearly 100 broadcasters" including the BBC and ITN.
507:
35:
773:
178:
791:
were used in television for broadcast automation, programmed by the UK company OmniBus
Systems: once considered "the world leader in television station automation" and at one point automating "every national news programme on terrestrial television in the United Kingdom". The Risc PC, in the form of
752:
Hydra multi-processor development system from Simtec. This plugged into the front processor slot and propagated the two original slots from the standard Risc PC, adding five extra slots, four being used by processor cards (these being the existing ARM610 or ARM710 cards at that time) with one slot
947:
significantly faster than the computer had been designed for. Acorn had originally expected ARM CPUs to progress from the 30 MHz ARM6 to the 40 MHz ARM7, and then onto the ARM8 cores, which at the time were clocked at around 50–80 MHz. In 2000, Castle released "Kinetic", a new
486:
The Risc PC had a novel case design where additional chassis, known as "slices", could be stacked on top of each other, expanding the height of the machine. Up to six additional slices could be stacked, each containing additional drives or expansion cards (known as "podules"). At the time the IBM
856:
case. Slated for release in late 1998, the project was abandoned just before completion, when Acorn's
Workstation Division was closed. Only two prototypes were ever built, and one was publicly displayed for historical interest at the RISC OS 2001 show in
702:
of
Cambridge Product Design (designer of the BBC Micro case). Custom plastic-based design with a 'slice' feature which allows extra case modules to be added to increase internal expansion space. Each slice adds two podule bays at the rear, and two
476:. Cards could often be added to other machines of the era to run DOS software but more usually these would implement the majority of an IBM PC clone on the card. The Risc PC required only the addition of the relevant CPU with some interface logic.
463:
In contrast to most contemporary IBM clones, the machines supported multiple processors as a standard feature. Secondary (or "guest") CPUs did not need to be ARM based and could be an entirely different architecture. It was possible to add an
444:
At launch, the original Risc PC 600 model was fitted as standard with an ARM 610, a 32-bit RISC CPU with 4KB of cache and clocked at 30MHz. CPU technology advanced rapidly in this period though and within only two years a DEC
707:(one 3.5-inch, one 5.25-inch) at the front, covered by a retractable flap to hide cosmetic inconsistencies in hue. Some slices were internally sprayed with nickel paint to meet electromagnetic and radio emissions regulations.
487:
clone industry was standardised around the PCI bus, but Acorn used its own bus implementation that was not compatible and required its own unique expansion cards. The machines did use the then industry standard IDE or
1790:
955:, which was available in systems at the time of the Risc PC's introduction, is over 20 times faster. The transfer of 650 MB would take 2 minutes via podule, compared to 5 seconds via PCI.
869:
In 2003 it was confirmed that no more Risc PCs would be produced. However RISC OS computers based on other ARM processors machines have been manufactured by companies since this date.
483:
with data shared between them. While now a ubiquitous technology, this was a less common feature in 1994 and more usually only one operating system would run at once on a single PC.
951:
The podule bus on the Risc PC can achieve a maximum data throughput of approximately 6100 KByte/s. It is 32-bit and Risc PC predecessors have a 16-bit bus. For comparison, the
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continued manufacturing the machines until 2003 and subsequently then produced their own similar designs. RISC OS is still available after becoming an open source product.
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1776:
807:
1996 – 200 MHz StrongARM CPU upgrade released, offering a five-fold increase in raw processing power compared to the ARM7 used in the previous high-end machines.
479:
Alternate operating systems ran concurrently with RISC OS in a window. Applications from both operating systems could run at the same time in a similar fashion to a
2461:
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support in common with
Archimedes-series machines. The Risc PC also offers DMA support in the first two podules on the bus. Third parties produced similar cards.
948:
StrongARM processor board with its own onboard memory slots augmenting main memory, reducing the need to negotiate the slow front-side bus for memory accesses.
1006:(October 12th 1998), Cambridge, UK-Acorn announced today that it has completed negotiations with Castle Technology for them to distribute Acorn products.
915:
Significantly better performance has been reached on the aged Risc PC design by using the newer 203 (and later 236) MHz StrongARM CPU, using third-party
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1997 – Acorn launch Acorn J233 StrongARM Risc PC, featuring an uprated 233 MHz model of StrongARM and including
Browser and Java software.
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Acorn has been pressed to give its users access to
Windows Multimedia PC CDs ... there are still doubts about full compatibility.
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operating system which has a windowed cooperative multi-tasking design. Unusually for a PC of the period the O/S was stored in
823:
2001 – Viewfinder Podule, AGP adapter allows the use of IBM PC clone AGP graphics cards (e.g. a range of ATI Rage and Radeon).
1944:
1521:
1035:
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2000 – In May, Castle
Technology reveal the Kinetic Risc PC range which included a faster processor card with onboard memory.
97:
850:
561:
Additionally prototypes of 33 MHz ARM700 and 55 MHz ARM810 processors were developed by Acorn, but not released.
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series. The machines had a unique architecture unrelated to IBM PC clones and were notable for using the Acorn developed
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is usually recognised as being the most significant fault of the computer; and the arrival of the (five times faster)
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Risc PC with lid removed, showing fixing lugs. The top slice has not been internally sprayed for RF shielding.
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641:, stored in 4 MiB ROM (RISC OS 3.50 shipped on 2 MiB ROMs) supplemented by disc-based components.
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acquire the rights to continue to market and produce the Risc PC during the breakup of Acorn
Computers.
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The modular design of the new computer allows a PC 486 processor to be added using a card ...
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The Acorn ACA56 Acorn PC card upgrade, showing the user guide, software disc, and card itself
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Customised Risc PC, running OmniBus
Systems's OUI software, shown here in a training centre
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861:, England. The remaining cases were bought by CTA Direct who sold them off to the public.
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Acorn discontinued production of the Risc PC in 1998 after a corporate reorganisation but
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986:"Acorn announces distribution deal with Castle Technology for RISC based products"
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2003 – Castle Technology announce the end of production and sale of the Risc PC.
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Acorn Risc PC 600 with two case slices, 3.5-inch disk drive and DVD-ROM drive
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located upon them to sidestep the speed bottleneck of the slow system bus.
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RISC OS 4, RISC OS Select, RISC OS Adjust and RISC OS 6 are available from
2311:
2301:
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Many composers bought an Archimedes simply to have access to the program.
1201:"Used Acorn 586 ACA57 Risc PC IBM 5x86C 100MHz Second Generation PC Card"
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1999:
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1995 – 40 MHz ARM710 CPU upgrade and Risc PC 700 model launched.
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The Risc PC was used by music composers and scorewriters to run the
535:: Dual-processor slots, one host processor and one guest processor.
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1994 – Risc PC 600 launched, featuring a 30 MHz ARM610 CPU.
762:: 117 (182 for two centre-sections) × 355 × 384 mm (H×W×D).
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could be installed at 233MHz which was around 8 times faster.
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controller, with optional dual-port VRAM up to 2 MiB.
607:
slots, supporting a maximum memory size of 256 MiB.
199:
713:: Optional extra, offering limited compatibility with
429:
was a range of personal computers launched in 1994 by
468:
CPU which enabled use of operating systems including
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as a replacement for the Acorn-implemented versions.
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and software allow PC compatible software to be run.
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1119:"RiscPC processors - ARM 610, ARM710 and StrongARM"
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100:. Unsourced material may be challenged and removed.
441:CPU which is now widely used in mobile devices.
943:processor in 1996 meant that the Risc PC had a
923:, and having specially-designed CPU cards with
1749:Risc PC, including pizza oven and kitchen sink
1558:
1556:
1554:
1170:"Computers: System that holds the right cards"
558:at 203 MHz, 236 MHz or 300 MHz.
2133:
1784:
1715:Hill, Andrew; Williams, Chris (2 June 2004).
460:, which enabled a relatively fast boot time.
8:
735:keyboard, Acorn mouse, headphone audio out,
241:
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581:co-processors at up to 133 MHz. These
63:Learn how and when to remove these messages
2140:
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2118:
1973:
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1791:
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1769:
1754:Castle reveal Kinetic Risc PC to the press
1216:IBM 5x86C 100MHz Second Generation PC Card
1063:Developers' Newsletter No. 33 – April 1994
240:
229:Learn how and when to remove this message
160:Learn how and when to remove this message
2457:Computers designed in the United Kingdom
591:chips (third party) were also available.
984:Acorn Computers Ltd (12 October 1998).
976:
787:Between 1994 and 2008, the Risc PC and
2462:Computer-related introductions in 1994
1387:"Simtec multi-processor board arrives"
1441:Nightingale, Julie (5 January 1999).
1412:Bourgeois, Derek (11 November 2001).
992:. Acorn Computers Ltd. Archived from
658:RISC OS 3.71 (StrongARM Risc PC J233)
7:
1591:"Castle reveal Kinetic to the press"
1563:Williams, Chris (11 November 2003).
678:with the CPU running in 32-bit mode.
98:adding citations to reliable sources
1689:Goodwin, Richard (12 August 2000).
1522:"Chris's Acorns: ART StrongARM CPU"
1097:"Chris's Acorns: Risc PC Computers"
518:An ARM 710 CPU card for the Risc PC
491:drives found in contemporary PCs.
1018:Mike Williams (11 November 2003).
698:: Designed by industrial designer
25:
1565:"Castle bids farewell to Risc PC"
1494:Barlow, Richard (December 1995).
1357:"Trading on misguided loyalties?"
1355:Lambert, Andy (20 October 1995).
911:based on the ARM7500-FE processor
549:610 at 30 MHz or 33 MHz
44:This article has multiple issues.
2158:
2157:
655:RISC OS 3.70 (StrongARM Risc PC)
375:384 mm (15.1 in)
369:355 mm (14.0 in)
256:
247:
176:
74:
33:
2417:Addition of major functionality
2345:ARM system-on-chip architecture
1589:Bailey, Alasdair (9 May 2000).
1168:Penman, Danny (15 April 1994).
363:117 mm (4.6 in)
85:needs additional citations for
52:or discuss these issues on the
1644:. Acorn Computers. August 1998
1545:"Acorn J233 StrongARM Risc PC"
841:Acorn set about designing the
661:RISC OS 4.03 (Kinetic Risc PC)
191:format but may read better as
1:
1642:"Clan Newsletter August 1998"
1443:"Radio ham makes the TV news"
1414:"Score yourself an orchestra"
1259:"Chris's Acorns: RISC OS Ltd"
1020:"Risc PC to Cease Production"
1475:. RISCOS Ltd. 14 August 2002
1469:RISC OS Promotional Brochure
1362:Times Educational Supplement
1079:... on Friday April 15th ...
1056:"Acorn launches the Risc PC"
2397:The Electronic Font Foundry
1664:"Risc PC 2 at RISC OS 2001"
433:and replaced the preceding
2478:
2164:Category: RISC OS software
1393:. December 1995. p. 9
1281:"ARM Linux Acorn Overview"
834:
652:RISC OS 3.60 (Risc PC 700)
649:RISC OS 3.50 (Risc PC 600)
313:11 November 2003
2410:
2155:
1764:Risc PC production ceases
1324:Burley, Ian (June 1994).
746:Additional configurations
255:
246:
2447:ARM-based home computers
502:Technical specifications
1616:"Viewfinder 2 revealed"
1524:. Chris Whytehead. 2009
1334:Personal Computer World
1261:. Chris Whytehead. 2009
1144:"RISC OS Open: Welcome"
1099:. Chris Whytehead. 2009
1028:comp.sys.acorn.announce
784:scorewriting software.
200:converting this article
2414:Current companies only
2355:Related and historical
1691:"Phoebe cases on sale"
884:ARM processor and PCI
777:
684:– no longer supported.
527:
519:
511:
297:; 30 years ago
1759:Risc PC 10th Birthday
901:S3C2440 ARM processor
775:
742:, network (optional).
552:ARM710 at 40 MHz
525:
517:
509:
452:The machines ran the
2292:Bundled applications
1977:8-bit microcomputers
1968:Derivatives, clones,
1233:Application Note 254
849:slots, and a yellow
645:Fitted as standard:
577:-class and at least
94:improve this article
1717:"Podule Bus review"
1326:"Acorn RISC PC 600"
1123:www.retro-kit.co.uk
243:
2452:Personal computers
2382:History of RISC OS
1543:Whytehead, Chris.
1148:www.riscosopen.org
778:
731:serial, parallel,
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295:15 April 1994
202:, if appropriate.
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2199:Archimedes series
2178:Castle Technology
2115:
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2034:RiscStation R7500
1963:
1962:
1901:Business Computer
1807:Operating systems
1745:Acorn's 10-slice
1622:. 19 January 2002
874:Castle Technology
837:Phoebe (computer)
815:Castle Technology
603:: Two 72-pin FPM
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16:(Redirected from
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1984:Prodest PC 128 S
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1950:Network Computer
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1496:"ARM710 upgrade"
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1303:"NetBSD/acorn32"
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1283:. ARMLinux. 2009
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1229:"APDL RiscWorld"
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935:The 16 MHz
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326:Operating system
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1069:. 30 April 1994
1067:Acorn Computers
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700:Allen Boothroyd
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674:RISC OS 5 from
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611:Video subsystem
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540:Host processors
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481:virtual machine
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150:February 2021
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105:Find sources:
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83:This article
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57:
56:
51:
50:
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40:
31:
30:
27:
19:
2367:ARM Holdings
2343:
2321:OS utilities
2244:Key software
2235:VirtualAcorn
2183:RISC OS Open
2093:Raspberry Pi
1934:
1896:Communicator
1746:
1724:. Retrieved
1710:
1698:. Retrieved
1695:The Icon Bar
1684:
1672:. Retrieved
1658:
1646:. Retrieved
1636:
1624:. Retrieved
1610:
1598:. Retrieved
1595:The Icon Bar
1584:
1572:. Retrieved
1538:
1526:. Retrieved
1516:
1504:. Retrieved
1502:. p. 51
1499:
1489:
1477:. Retrieved
1468:
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1450:. Retrieved
1447:The Guardian
1446:
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1428:
1421:. Retrieved
1418:The Guardian
1417:
1407:
1395:. Retrieved
1390:
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1366:. Retrieved
1360:
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1332:
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1232:
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1208:. Retrieved
1204:
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1180:. Retrieved
1173:
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1153:10 September
1151:. Retrieved
1147:
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1128:11 September
1126:. Retrieved
1122:
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1101:. Retrieved
1078:
1071:. Retrieved
1062:
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1038:. Retrieved
1013:
1005:
998:. Retrieved
994:the original
989:
979:
950:
934:
921:overclocking
914:
882:Intel XScale
868:
840:
786:
779:
759:
745:
724:
711:CD-ROM drive
710:
695:
676:RISC OS Open
634:
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567:
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493:
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462:
451:
443:
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364:
310:Discontinued
292:Release date
278:Manufacturer
225:
212:January 2011
209:
204:Editing help
186:
156:
147:
137:
130:
123:
116:
104:
92:Please help
87:verification
84:
60:
53:
47:
46:Please help
43:
26:
2068:BeagleBoard
1970:compatibles
1945:Set-Top Box
1747:Rocket Ship
1506:15 November
1368:10 November
1182:6 September
965:Acorn A7000
931:Limitations
917:video cards
905:RiscStation
865:After Acorn
854:form-factor
601:Memory type
386:Predecessor
343:ARMv3/ARMv4
2431:Categories
2392:RISCOS Ltd
2372:Element 14
2256:Impression
2098:Touch Book
2088:PandaBoard
2073:DevKit8000
2060:dev boards
1993:32-bit PCs
1906:BBC Master
1528:26 January
1500:Acorn User
1391:Acorn User
1265:26 January
1210:8 November
1103:26 January
1073:26 January
971:References
760:Dimensions
715:multimedia
705:drive bays
669:RISCOS Ltd
474:Windows 95
435:Archimedes
390:Archimedes
357:Dimensions
317:2003-11-11
302:1994-04-15
120:newspapers
49:improve it
2328:MakeModes
2287:BBC BASIC
2223:Emulation
2015:in Kiste)
1885:BBC Micro
1853:Computers
1814:Acorn MOS
1726:30 August
1700:19 August
1674:13 August
1648:19 August
1626:30 August
1600:13 August
1574:30 August
1340:30 August
1309:13 August
1287:13 August
1243:30 August
1040:30 August
1024:Newsgroup
1000:6 January
941:StrongARM
878:Iyonix PC
859:Berkshire
843:Risc PC 2
831:Risc PC 2
621:Expansion
579:IBM 5x86C
556:StrongARM
447:StrongARM
405:Iyonix PC
397:Successor
268:Developer
109:"Risc PC"
55:talk page
2312:Ram disk
2302:Icon bar
2282:AIF file
2251:ArtWorks
2192:Hardware
2049:Titanium
2004:ARMini (
1891:Electron
1887:(Proton)
1479:31 March
1452:31 March
1178:. London
959:See also
796:Timeline
782:Sibelius
625:Eurocard
583:PC cards
349:Graphics
2442:RISC OS
2377:Galileo
2261:NetSurf
2230:Aemulor
2149:RISC OS
2083:Pandora
2058:32-bit
1935:Risc PC
1915:32-bit
1839:Galileo
1834:RISC OS
1829:RISC iX
1397:1 April
1032:Usenet:
1026::
953:PCI bus
899:Samsung
813:1998 –
719:CD-ROMs
639:RISC OS
627:-sized
454:RISC OS
427:Risc PC
415:Related
331:RISC OS
315: (
300: (
242:Risc PC
134:scholar
2387:Phoebe
2214:A9home
2209:Iyonix
2162:
2078:IGEPv2
2044:Iyonix
2000:A9home
1955:Phoebe
1860:8-bit
1670:. 2001
1423:10 May
1034:
895:A9home
789:A7000+
729:RS-232
688:NetBSD
629:Podule
615:VIDC20
409:A9home
401:Phoebe
392:series
352:VIDC20
187:is in
136:
129:
122:
115:
107:
18:RiscPC
2337:Books
2103:i.MX6
2019:Omega
2011:BIK (
1940:A7000
1819:Panos
1721:Drobe
1668:Drobe
1620:Drobe
1569:Drobe
1473:(PDF)
1329:(PDF)
1059:(PDF)
909:R7500
725:Ports
682:Linux
431:Acorn
419:A7000
193:prose
141:JSTOR
127:books
2402:NCOS
2277:ADFS
2029:Medi
2024:Mico
1880:Atom
1844:NCOS
1728:2019
1702:2009
1676:2009
1650:2009
1628:2019
1602:2009
1576:2019
1530:2018
1508:2021
1481:2022
1454:2022
1425:2011
1399:2021
1370:2011
1342:2013
1311:2009
1289:2009
1267:2018
1245:2019
1212:2017
1205:eBay
1184:2011
1155:2023
1130:2023
1105:2018
1075:2018
1042:2019
1002:2011
737:DE15
733:PS/2
696:Case
605:SIMM
489:SCSI
472:and
189:list
113:news
2307:OLE
2039:A75
1917:PCs
1824:ARX
945:CPU
925:RAM
886:bus
851:NLX
847:PCI
768:Use
740:VGA
717:PC
589:DSP
575:486
547:ARM
533:CPU
470:DOS
466:x86
458:ROM
439:ARM
377:(d)
371:(w)
365:(h)
338:CPU
96:by
2433::
1930:A4
1719:.
1693:.
1666:.
1618:.
1593:.
1567:.
1553:^
1498:.
1445:.
1427:.
1416:.
1389:.
1372:.
1359:.
1331:.
1235:.
1231:.
1214:.
1203:.
1186:.
1172:.
1146:.
1121:.
1086:^
1077:.
1065:.
1061:.
1030:.
1022:.
1004:.
988:.
919:,
907:–
893:–
876:–
748::
727::
637::
623::
613::
570::
542::
407:,
403:,
284:,
58:.
2141:e
2134:t
2127:v
2008:)
1792:e
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210:(
196:.
163:)
157:(
152:)
148:(
138:·
131:·
124:·
117:·
90:.
65:)
61:(
20:)
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