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Power ISA is a reduced instruction set computer (RISC) instruction set architecture (ISA) currently developed by the OpenPOWER Foundation, led by IBM. It was originally developed by IBM and the now-defunct Power.org industry group.
IBM POWER is a reduced instruction set computer (RISC) instruction set architecture (ISA) developed by IBM. The name is an acronym for Performance Optimization With Enhanced RISC. [1] The ISA is used as base for high end microprocessors from IBM during the 1990s and were used in many of IBM's servers, minicomputers, workstations, and ...
It is the first processor written from scratch using the open Power ISA 3.0, and is released by the OpenPOWER Foundation as a reference design. The project started as a demo, proof of concept and a reference implementation for the release of the opensource initiative regarding Power ISA 3.0. [15]
An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.
The OpenPOWER Foundation is a collaboration around Power ISA-based products initiated by IBM and announced as the "OpenPOWER Consortium" on August 6, 2013. [5] IBM's focus is to open up technology surrounding their Power Architecture offerings, such as processor specifications, firmware, and software with a liberal license, and will be using a collaborative development model with their partners.
It is largely based on the earlier IBM POWER architecture, and retains a high level of compatibility with it; the architectures have remained close enough that the same programs and operating systems will run on both if some care is taken in preparation; newer chips in the Power series use the Power ISA.
IBM joined the discussion and the three founded the AIM alliance to build the PowerPC ISA, heavily based on the POWER ISA, but with additions from both Apple and Motorola. It was to be a complete 32/64 bit RISC architecture, and to range from very low end embedded microcontrollers to the very high end supercomputer and server applications.
OpenPOWER – Power ISA, an open-source hardware instruction set architecture initiated by IBM; OpenSPARC – Sun's, later Oracle's high-performance processor; Parallax Propeller – a multi-core microcontroller with eight 32-bit RISC cores; Parallella – single-board computer with a manycore coprocessor and field-programmable gate array (FPGA)