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Arm Architecture: Working
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The ARMv7 architecture is designed to ensure software compatibility with earlier generations of ARM processors. The ARM Cortex-M series supports Thumb-2 instructions, a superset of the existing Thumb instructions, and will execute existing Thumb code written for earlier processors. User code written for the ARM Cortex-M series processors can be 100 percent compatible with ARM Cortex-R series microprocessors providing a forward migration path. ARM Cortex-M series system code, such as real time operating systems, can be easily ported to ARM Cortex-R series-based systems. The ARM Cortex-A and -R series processors additionally support the ARM 32-bit instruction set for full backwards compatibility with earlier ARM processors ranging from the ARM7TDMI® processor introduced in 1995, up to the latest ARM11 processor family.
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Developed concurrently with ARM Architecture Version 5 this is a new floating point system giving the ARM family considerably faster floating point performance. As with the Version 5 architecture details are unavailble on exactly what this architecture implements.
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Over the last ten years, the ARM architecture has become one of the most pervasive architectures in the world, with more than 2 billion ARM-based processors embedded in products ranging from cell phones to automotive braking systems. A world-wide community of ARM developers in semiconductor and product design companies includes software developers, system designers and hardware engineers. To date no book has directly addressed their need to develop the system and software for an ARM-based system. This text fills that gap. This book provides a comprehensive description of the operation of the ARM core from a developer?s perspective with a clear emphasis on software. It demonstrates not only how to write efficient ARM software in C and assembly but ... how to optimize code.
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This new ARM processor is compliant with the ARMv5TE architecture and optimized for use in both synchronous and asynchronous system-on-chip designs, permitting easy integration by semiconductor makers. The key benefits of the processor include low Electro Magnetic emission, reducing the probability of interfering with sensitive circuitry, and low peak currents, reducing system power requirements. Because asynchronous processors consume zero dynamic power when there is no activity, they can significantly extend battery life. ARM has long recognised the potential of asynchronous design and has supported the Amulet(R) project lead by Professor Steve Furber at Manchester University.
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The ARM architecture is interesting in several respects. It clearly has a RISC lineage, but the designers were ... careful to make it a good “target” for humans writing in assembler, in addition to being a good target for C compilers. Unlike many of its RISC cousins designed for cost-is-no-object high-end servers and workstations, the ARM was designed as a “low-end” architecture. It was, in fact, originally conceived to replace the 6502 in a new line of Acorn computers.
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The summit is a two-day workshop that introduces ARM partners to a broad range of business opportunities available through integration of the ARM architecture and Windows CE .NET. The summit is an invitation-only event that will share confidential technology and business strategy information with attendees. Topics covered at the summit include marketing strategies, technology road maps, silicon-vendor case studies of successful embedded solutions and technical overviews. Keynote presentations will be given by Warren, Inglis and Mike Muller, chief technical officer at ARM. Product presentations will cover Pocket PC, Smartphone, Windows Powered Smart Displays, .NET Compact Framework, Visual Studio® .NET and Windows Media (TM) . More information on the summit can be obtained by contacting wcesvr@microsoft.com.
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