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RISC OS
RISC OS is a computer operating system originally designed by Acorn Computers Ltd in Cambridge, England. First released in 1987, it was designed to run on the ARM chipset, which Acorn had designed concurrently for use in its new line of Archimedes personal computers. RISC OS takes its name from the reduced instruction set computer (RISC) architecture it supports. Between 1987 and 1998, RISC OS was included in every ARM-based Acorn computer model, including the Acorn Archimedes line, Acorn's R line (with RISC iX as a dual-boot option), RiscPC, A7000, and prototype models such as the Acorn NewsPad and Phoebe computer. A version of the OS, named NCOS, was used in Oracle Corporation's Network Computer and compatible systems. After the break-up of Acorn in 1998, development of the OS was forked and continued separately by several companies, including , Pace Micro Technology, and Castle Technology. Since then, it has been bundled with several ARM-based desktop computers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RISCOS Ltd
RISCOS Ltd. (also referred to as ROL) was a limited company engaged in computer software and IT consulting. It licensed the rights to continue the development of and to distribute it for desktop machines (as an upgrade or for new machines) from Element 14 and subsequently Pace Micro Technology. Company founders include developers who formerly worked within Acorn's dealership network. It was established as a nonprofit company. On or before 4 March 2013 3QD Developments acquired RISCOS Ltd's flavour of RISC OS. RISCOS Ltd was dissolved on 14 May 2013. History RISCOS Ltd was formed to continue end-user-focused development of RISC OS after the de-listing of Acorn Computers, following its purchase by Morgan Stanley Dean Witter in order to benefit from the shareholding that Acorn held in ARM Ltd. In March 1999, RISCOS Ltd obtained exclusive rights to develop and sell RISC OS 4 for the desktop market from Element 14. A few weeks later Pace purchased Acorn's Cambridge headquarters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RISC OS Open
RISC OS Open Ltd. (also referred to as ROOL) is a limited company engaged in computer software and IT consulting. It is managing the process of publishing the source code to RISC OS. Company founders include staff who formerly worked for Pace, the company which acquired RISC OS after Acorn's demise. The source code publication was initially facilitated by a shared source initiative (SSI) between ROOL and Castle Technology (CTL), prior to a switch to the more widely recognised Apache licence in October 2018. ROOL hopes that by making the RISC OS source code available for free it will help stimulate development of both the RISC OS source code and the platform as a whole. Operations ROOL set initial goals to make the source code easily available (on the web), and also to establish a wiki, forum and bug tracker. These have been available since December 2006. Operations exist to facilitate tasks related to ROOL's goals. Additionally, staff undertake development work on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn Computers
Acorn Computers Ltd. was a British computer company established in Cambridge, England, in 1978. The company produced a number of computers which were especially popular in the United Kingdom, UK, including the Acorn Electron and the Acorn Archimedes. Acorn's computer dominated the UK educational computer market during the 1980s. Though the company was acquired and largely dismantled in early 1999, with various activities being dispersed amongst new and established companies, its legacy includes the development of reduced instruction set computing (RISC) personal computers. One of its operating systems, , continues to be developed by RISC OS Open. Some activities established by Acorn lived on: technology developed by Arm (company), Arm, created by Acorn as a joint venture with Apple, Inc., Apple and VLSI Technology, VLSI in 1990, is dominant in the mobile phone and personal digital assistant (PDA) microprocessor market. Acorn is sometimes referred to as the "British Apple" and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn MOS
The Machine Operating System (MOS) or OS is a discontinued computer operating system (OS) used in Acorn Computers' BBC computer range. It included support for four-channel sound, graphics, file system abstraction, and digital and analogue input/output (I/O) including a daisy-chained expansion bus. The system was single-tasking, monolithic and non- reentrant. Versions 0.10 to 1.20 were used on the BBC Micro, version 1.00 on the Electron, version 2 was used on the B+, and versions 3 to 5 were used in the BBC Master series. The final BBC computer, the BBC A3000, was 32-bit and ran RISC OS, which kept on portions of the Acorn MOS architecture and shared a number of characteristics (e.g. "star commands" CLI, "VDU" video control codes and screen modes) with the earlier 8-bit MOS. Versions 0 to 2 of the MOS were 16 KiB in size, written in 6502 machine code, and held in read-only memory (ROM) on the motherboard. The upper quarter of the 16-bit address space (0xC000 to 0xFFFF) is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Network Computer
The Network Computer (or NC) was a diskless desktop computer device made by Oracle Corporation from about 1996 to 2000. The devices were designed and manufactured by an alliance, which included Sun Microsystems, IBM, and others. The devices were designed with minimum specifications, based on the Network Computer Reference Profile. The brand was also employed as a marketing term to try to popularize this design of computer within enterprise and among consumers. The NC brand was mainly intended to inspire a range of desktop computers from various suppliers that, by virtue of their diskless design and use of inexpensive components and software, were cheaper and easier to manage than standard fat client desktops. However, due to the commoditization of standard desktop components, and due to the increasing availability and popularity of various software options for using full desktops as diskless nodes, thin clients, and hybrid clients, the Network Computer brand never achieved th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oracle Corporation
Oracle Corporation is an American multinational computer technology corporation headquartered in Austin, Texas. In 2020, Oracle was the third-largest software company in the world by revenue and market capitalization. The company sells database software and technology (particularly its own brands), cloud engineered systems, and enterprise software products, such as enterprise resource planning (ERP) software, human capital management (HCM) software, customer relationship management (CRM) software (also known as customer experience), enterprise performance management (EPM) software, and supply chain management (SCM) software. History Larry Ellison co-founded Oracle Corporation in 1977 with Bob Miner and Ed Oates under the name Software Development Laboratories (SDL). Ellison took inspiration from the 1970 paper written by Edgar F. Codd on relational database management systems ( RDBMS) named "A Relational Model of Data for Large Shared Data Banks." He heard about t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NCOS
A non-commissioned officer (NCO) is a military officer who has not pursued a commission. Non-commissioned officers usually earn their position of authority by promotion through the enlisted ranks. (Non-officers, which includes most or all enlisted personnel, are of lower rank than any officer.) In contrast, commissioned officers usually enter directly from a military academy, officer candidate school (OCS), or officer training school (OTS) after receiving a post-secondary degree. The NCO corps usually includes many grades of enlisted, corporal and sergeant; in some countries, warrant officers also carry out the duties of NCOs. The naval equivalent includes some or all grades of petty officer. There are different classes of non-commissioned officers, including junior (lower ranked) non-commissioned officers (JNCO) and senior/staff (higher ranked) non-commissioned officers (SNCO). Function The non-commissioned officer corps has been referred to as "the backbone" of the armed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phoebe (computer)
The Phoebe 2100 (or ) was to be Acorn Computers' successor to the RiscPC, slated for release in late 1998. However, in September 1998, Acorn cancelled the project as part of a restructuring of the company. Specification :233 Megahertz, MHz Intel StrongARM SA110 Revision S Central processing unit, CPU. Support for multiple CPUs on daughter cards available, but multiple CPU support was not available in RISC OS :64 MHz front-side bus :up to 512 MiB of synchronous dynamic random-access memory, SDRAM :IOMD2 I/O Controller ::PLX Technology PCI bridge PCI9080 :::4 PCI slots (33MHz) ::PC Style Joystick/Game Port ::3 Acorn Podule expansion sockets ::SMC37672 SuperIO chip supporting: :::PS/2 Keyboard and Mouse :::Two Advanced Technology Attachment, EIDE channels supporting up to four devices (6.4 Gigabyte, GB unit supplied) :::Two serial ports :::Parallel Port :::Single Floppy drive :VIDC20 Revision R video controller supporting: ::4 Megabyte, MiB of EDO Video RAM, VRAM runni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn A7000
The A7000 and A7000+ were Acorn Computers' entry level computers based somewhat on the Risc PC architecture. Launched in 1995, the A7000 was considered a successor to the A5000, fitting into Acorn's range between the A4000 and Risc PC600, featuring a 32 MHz ARM7500 system-on-a-chip (SoC) and either 2 MB, 4 MB or 8 MB of RAM soldered to the motherboard, with a single memory slot permitting up to 128 MB of additional RAM. In performance terms, the A7000 was described as being three to four times faster than the A4000 and slightly faster than a Risc PC 600 model without video RAM fitted, also having comparable MIPS and Dhrystone performance ratings to 66 MHz Intel 486DX2 systems. Unlike the Risc PC, the A7000 had been "designed with the rigours of school life in mind", aiming for "a 7-year classroom lifespan". The machine's case was similar to the Acorn Online Media set-top box design incorporating the same SoC, and the product was considered to have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RiscPC
The Risc PC is Acorn Computers's RISC OS/ARM architecture, Acorn RISC Machine computer, launched on 15 April 1994, which superseded the Acorn Archimedes. The Acorn PC card and software allows IBM PC compatible, PC compatible software to be run. Like the Archimedes, the Risc PC continues the practice of having the RISC OS operating system in a read-only memory, ROM module. Risc PC augments the ROM-based core OS with a disk-based directory structure containing configuration information, and some applications which had previously been kept in ROM. At the 1996 BETT Educational Computing & Technology Awards, the machine was awarded Gold in the hardware category. Technical specifications Use The Risc PC was used by music composers and scorewriters to run the Sibelius (computer program), Sibelius scorewriting software. Between 1994 and 2008, the Risc PC and Acorn A7000, A7000+ were used in television for broadcast automation, programmed by the UK company OmniBus Systems: on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RISC IX
RISC iX is a discontinued Unix operating system designed to run on a series of workstations based on the Acorn Archimedes microcomputer. Heavily based on 4.3BSD, it was initially completed in 1988, a year after Arthur but before RISC OS. It was introduced in the ARM2-based R140 workstation in 1989, followed up by the ARM3-based R200-series workstations in 1990. Features Acorn chose BSD 4.3 as the basis for RISC iX due to its academic origins, these being considered as making the software more appropriate for Acorn's principal target market of tertiary education. SunOS and NeXTSTEP systems were given as examples of other "modern high-performance workstations that use BSD". Other reasons for choosing BSD included better integration of networking and connectivity tools in comparison to System V. * X11 (initially Release 2) with Ardent Window Manager, Tab Window Manager and Ultrix Window Manager available by default, plus X.desktop from IXI Limited * System V virtual memory e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reduced Instruction Set Computer
In computer engineering, a reduced instruction set computer (RISC) is a computer designed to simplify the individual instructions given to the computer to accomplish tasks. Compared to the instructions given to a complex instruction set computer (CISC), a RISC computer might require more instructions (more code) in order to accomplish a task because the individual instructions are written in simpler code. The goal is to offset the need to process more instructions by increasing the speed of each instruction, in particular by implementing an instruction pipeline, which may be simpler given simpler instructions. The key operational concept of the RISC computer is that each instruction performs only one function (e.g. copy a value from memory to a register). The RISC computer usually has many (16 or 32) high-speed, general-purpose registers with a load/store architecture in which the code for the register-register instructions (for performing arithmetic and tests) are separate f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
