Back حوسبة دقيقة بمجموعة تعليمات مخفضة Arabic PA-RISC Czech PA-RISC German PA-RISC Esperanto PA-RISC Spanish PA-RISC Finnish PA-RISC French PA-RISC Hungarian PA-RISC ID PA-RISC Italian

PA-RISC

PA-RISC (HP/PA)
DesignerHewlett-Packard
Bits64-bit (32→64)
Introduced1986 (1996 PA-RISC 2.0)
Version2.0 (1996)
DesignRISC
EncodingFixed
BranchingCompare and branch
EndiannessBig
ExtensionsMultimedia Acceleration eXtensions (MAX), MAX-2
OpenNo
SuccessorPA-WideWord → Itanium[1]
Registers
General-purpose32
Floating point32 64-bit (16 64-bit in PA-RISC 1.0)
HP PA-RISC 7300LC microprocessor
HP 9000 C110 PA-RISC workstation booting Debian GNU/Linux

Precision Architecture RISC (PA-RISC) or Hewlett Packard Precision Architecture (HP/PA or simply HPPA), is a general purpose computer instruction set architecture (ISA) developed by Hewlett-Packard from the 1980s until the 2000s.

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.[2][3] HP stopped selling PA-RISC-based HP 9000 systems at the end of 2008 but supported servers running PA-RISC chips until 2013.[4] PA-RISC was succeeded by the Itanium (originally IA-64) ISA, jointly developed by HP and Intel.[5]

  1. ^ "Inventing Itanium: How HP Labs helped create the next-generation chip architecture". HP Labs. 1 June 2001. Archived from the original on 7 February 2002. Retrieved 24 March 2024.
  2. ^ "One Year Ago". (26 February 1987). Computer Business Review.
  3. ^ Rosenbladt, Peter (September 1987). "In this Issue" (PDF). Hewlett-Packard Journal. 38 (9): 3. Archived (PDF) from the original on 26 April 2019. Retrieved 8 June 2018. ... In the March 1987 issue we described the HP 3000 Series 930 and HP 9000 Model 840 Computers, which were HP's first realizations of HP Precision Architecture in off-the-shelf TTL technology. ...
  4. ^ "How long will HP continue to support HP 9000 systems?". Archived from the original on 19 February 2012. Retrieved 29 February 2008.
  5. ^ "HP Completes Its PA-RISC Road Map With Final Processor Upgrade". Archived from the original on 13 February 2008. Retrieved 24 July 2007.

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