The computers covered by this site are based on HP PA-RISC architecture and processors from the 1980s to 2000s. Most of the chipsets and system designs used were custom HP for its PA-RISC servers and workstations.
The following PA-RISC components are covered with individual articles:
- PA-RISC Processors: HP developed more than a dozen 32-bit and 64-bit PA-RISC processors, from the early PA 1.0 to the PA-7000 and PA-8000 families.
- PA-RISC Architecture: Details of PA-RISC architecture and processors.
- Chipsets: HP PA-RISC computers used proprietary HP chipsets and system designs, usually specific to a group of processors and computers.
- Buses: Many custom HP buses were used in PA-RISC for processors, memory and I/O devices, like GSC, VSC and HP-PB but also industry standard such as EISA and PCI.
- SCSI Controllers: Storage used industry-standard SCSI buses and third-party SCSI controllers.
- Graphics adapters: HP sold PA-RISC with its own range of CRX and Visualize graphics adapters.
Four phases of PA-RISC architecture can be seen in PA-RISC computers by HP:
|I||Infancy: Early Architecture|
|TS-1, NS-1, NS-2, PCX||Early||SIU/SPI, CTB|
|II||Growth: 32-bit 1990s|
|PA-7000, PA-7100||ASP/Viper||Viper. ASP|
|III||Maturity: The heydays|
|PA-7100LC, PA-7300LC||LASI||MIOC, LASI, Wax, Dino|
|PA-7200, PA-8000, PA-8200||U2/UTurn||MMC/SMC,
LASI, Wax, Dino, Cujo
|PA-8500, PA-8600, PA-8700||Astro||Astro, Elroy|
|Stretch||DEW, Prelude, IKE, Elroy|
|IV||Decline: 64-bit to Itanium|
|PA-8700, PA-8800 PA-8900||Cell||CC, XBC, SBA, Elroy|
|PA-8800 PA-8900, Itanium 2||zx1||Pluto, Mercury|
Several pages with older, unmaintained PA-RISC content are kept on this site for archival reasons, listed in Archived PA-RISC pages.