Reduced Instruction Set Computer

Research Institute for Symbolic Computation (Reference: org., Oesterreich)

Reduced Instruction Set Code (Reference: CPU)

eSi-RISC is a configurable CPU architecture. It is available in five implementations: the eSi-1600, eSi-1650, eSi-3200, eSi-3250 and eSi-3264.

Berkeley RISC is one of two seminal research projects into reduced instruction set computer (RISC) based microprocessor design taking place under the Defense Advanced Research Projects Agency Very Large Scale Integration (VLSI) VLSI Project. RISC was led by David Patterson (who coined the term RISC) at the University of California, Berkeley between 1980 and 1984.

<operating system> (Reduced Instruction Set Computer Operating System) The operating system originally developed by {Acorn Computers} for their Archimedes family of {personal computers}. RISC OS replaced the Arthur operating system used on the first Archimedeses. It is written in ARM assembly code and distributed on ROM so it takes up no disk space and takes no time to load. It supports cooperative multitasking with memory management and includes a graphical user interface or "WIMP". It is written in a highly modular style and makes extensive use of vectors so it is easy to modify and extend by loading new modules in RAM. Many system calls (called "SWIs" - software interrupts) are available to application programmers and some of these are available as user comands via a built-in command-line interpreter. RISC OS also supported {outline fonts} when only bitmap fonts were available on most other platforms. Following the virtual demise of Acorn, development of RISC OS 4 was taken over by RISCOS Ltd on 1999-03-05 and released on 1999-07-01. Latest version: 4.39, as of 2004-09-21. (2004-09-21)

<company> (ARM) A company formed in 1990 by Acorn Computers Ltd., Apple Computer, Inc. and VLSI Technology to market and develop the Advanced RISC Machine microprocessor family, originally designed by Acorn. ARM Ltd. also designs and licenses peripheral chips and supplies supporting software and hardware tools. In April 1993, Nippon Investment and Finance, a Daiwa Securities company, became ARM's fourth investor. In May 1994 Samsung became the sixth large company to have a licence to use the ARM processor core. The success of ARM Ltd. and the strategy to widen the availability of RISC technology has resulted in its chips now being used in a range of products including the {Apple Newton}. As measured by an independent authority, more ARM processors were shipped than SPARC chips in 1993. ARM has also sold three times more chips than the PowerPC consortium. http://systemv.com/armltd/index.html. E-mail: armltd.co.uk. Address: Advanced RISC Machines Ltd. Fulbourn Road, Cherry Hinton, Cambridge CB1 4JN, UK. Telephone: +44 (1223) 400 400. Fax: +44 (1223) 400 410. (1994-11-03)

Advanced RISC Computing (ARC) is a specification promulgated by a defunct consortium of computer manufacturers (the Advanced Computing Environment project), setting forth a standard MIPS RISC-based computer hardware and firmware environment.

<processor> The original name of the Advanced RISC Machine. (1995-03-07)