HP stopped selling PA-RISC-based HP 9000 systems at the end of 2008 but supported servers running PA-RISC chips until 2013. ==History== In the late 1980s, HP was building four series of computers, all based on CISC CPUs.
Later implementations were multi-chip VLSI designs fabricated in NMOS processes (NS1 and NS2) and CMOS (CS1 and PCX). They were first used in a new series of HP 3000 machines in the late 1980s – the 930 and 950, commonly known at the time as Spectrum systems, the name given to them in the development labs.
HP planned to use Spectrum to move all of their non-PC compatible machines to a single RISC CPU family. Work began on the Precision Architecture at HP Laboratories in early 1982 defining the instruction set and virtual memory system, and the first TTL implementation began in April 1983, with simulation of the processor occurring in 1983, and with a complete processor delivered to software developers in July 1984.
HP planned to use Spectrum to move all of their non-PC compatible machines to a single RISC CPU family. Work began on the Precision Architecture at HP Laboratories in early 1982 defining the instruction set and virtual memory system, and the first TTL implementation began in April 1983, with simulation of the processor occurring in 1983, and with a complete processor delivered to software developers in July 1984.
HP planned to use Spectrum to move all of their non-PC compatible machines to a single RISC CPU family. Work began on the Precision Architecture at HP Laboratories in early 1982 defining the instruction set and virtual memory system, and the first TTL implementation began in April 1983, with simulation of the processor occurring in 1983, and with a complete processor delivered to software developers in July 1984.
Systems prototyping followed, with "lab prototypes" being produced in 1985 and product prototypes in 1986. The first processors were introduced in products during 1986.
The design is also referred to as HP/PA for Hewlett Packard Precision Architecture. The architecture was introduced on 26 February 1986, when the HP 3000 Series 930 and HP 9000 Model 840 computers were launched featuring the first implementation, the TS1. PA-RISC has been succeeded by the Itanium (originally IA-64) ISA, jointly developed by HP and Intel.
One line was the IBM PC compatible Intel i286-based Vectra Series, started in 1986.
Systems prototyping followed, with "lab prototypes" being produced in 1985 and product prototypes in 1986. The first processors were introduced in products during 1986.
Another innovation of the PA-RISC was the addition of vectorized instructions (SIMD) in the form of MAX, which were first introduced on the PA-7100LC. Precision RISC Organization, an industry group led by HP, was founded in 1992, to promote the PA-RISC architecture.
Members included Convex, Hitachi, Hughes Aircraft, Mitsubishi, NEC, OKI, Prime, Stratus, Yokogawa, Red Brick Software, and Allegro Consultants, Inc.. The ISA was extended in 1996 to 64 bits, with this revision named PA-RISC 2.0.
HP stopped selling PA-RISC-based HP 9000 systems at the end of 2008 but supported servers running PA-RISC chips until 2013. ==History== In the late 1980s, HP was building four series of computers, all based on CISC CPUs.
HP stopped selling PA-RISC-based HP 9000 systems at the end of 2008 but supported servers running PA-RISC chips until 2013. ==History== In the late 1980s, HP was building four series of computers, all based on CISC CPUs.
All text is taken from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License .
Page generated on 2021-08-05