The first commercial microprocessor chip, Intel's 4004, appeared in November, 1971. Since then, most designers have used fixed-ISA (instruction-set architecture) processors in their system designs-first as processor chips in board-level designs and later as processor cores in SOCs. In fact, many system designers cannot envision designing a custom processor for their projects because the use of fixed-ISA machines has become so thoroughly engrained in the conventional design methodology. A small cadre of designers created custom processors based on bit-slice technology in the 1980s for applications with very high performance requirements, but electronic system design has largely evolved into an exercise in adapting standardized processor and DSP architectures to target tasks, often with additional hardware acceleration to bridge the inevitable gap between a task's required computations and the fixed-ISA processor's abilities. © 2007 Springer Science+Business Media B.V.
CITATION STYLE
Leibson, S. (2007). Customizable processors and processor customization. In Processor Design: System-on-Chip Computing for ASICs and FPGAs (pp. 149–175). Springer Netherlands. https://doi.org/10.1007/978-1-4020-5530-0_8
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