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Unformatted text preview: M processors. The ARM was originally developed at Acorn Computers Limited of Cambridge, England, between 1983 and 1985. It was the first RISC microprocessor developed for commercial use and has some significant differences from subsequent RISC architectures. The principal features of the ARM architecture are presented here in overview form; the details are postponed to subsequent chapters. In 1990 ARM Limited was established as a separate company specifically to widen the exploitation of ARM technology, since when the ARM has been licensed to many semiconductor manufacturers around the world. It has become established as a market-leader for low-power and cost-sensitive embedded applications. No processor is particularly useful without the support of hardware and software development tools. The ARM is supported by a toolkit which includes an instruction set emulator for hardware modelling and software testing and benchmarking, an assembler, C and C++ compilers, a linker and a symbolic debugger. 35 36 The ARM Architecture 2.1 The Acorn RISC Machine The first ARM processor was developed at Acorn Computers Limited, of Cambridge, England, between October 1983 and April 1985. At that time, and until the formation of Advanced RISC Machines Limited (which later was renamed simply ARM Limited) in 1990, ARM stood for Acorn RISC Machine. Acorn had developed a strong position in the UK personal computer market due to the success of the BBC (British Broadcasting Corporation) microcomputer. The BBC micro was a machine powered by the 8-bit 6502 microprocessor and rapidly became established as the dominant machine in UK schools following its introduction in January 1982 in support of a series of television programmes broadcast by the BBC. It also enjoyed enthusiastic support in the hobbyist market and found its way into a number of research laboratories and higher education establishments. Following the success of the BBC micro, Acorn's engineers looked at various microprocessors to build a successor machine around, but found all the commercial offerings lacking. The 16-bit CISC microprocessors that were available in 1983 were slower than...
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This document was uploaded on 10/30/2011 for the course CSE 378 380 at SUNY Buffalo.

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