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The PA-8000 (PCX-U), code-named Onyx, is a microprocessor developed and fabricated by Hewlett-Packard (HP) that implemented the PA-RISC 2.0 instruction set architecture (ISA).[1] It was a completely new design with no circuitry derived from previous PA-RISC microprocessors. The PA-8000 was introduced on 2 November 1995 when shipments began to members of the Precision RISC Organization (PRO).[2] It was used exclusively by PRO members and was not sold on the merchant market. All follow-on PA-8x00 processors (PA-8200 to PA-8900, described further below) are based on the basic PA-8000 processor core.
The PA-8000 was used by:
- HP in its HP 9000 and HP 3000[3] workstations and servers
- NEC in its TX7/P590 server
- Stratus Technologies in its Continuum fault-tolerant servers
- ^ Hunt 1995
- ^ "HP Announces Release of PA-8000 to PRO Partners".
- ^ Cooper, Kevin (22 July 2008). "MPE/iX 7.5 and HP e3000 PA-8700 performance update" (PDF). HP. Retrieved 3 July 2024.