OpenPA.net

The second incarnation of the L-Class servers are, similar to their direct predecessors L1000 and L2000, 7U rack-mountable servers with either 1-2 or 1-4 processors, 8GB or 16GB RAM and a large set of I/O options and expandability.

The rp7405/rp7410 N4000 servers are up to 8-way multiprocessing servers and the smallest HP systems which can be partitioned into (two) logical servers (nPartitions).

The rp4400 series are the bigger brothers of the rack-mountable rp3400 — the dual-processor rp4410 and quad-processor rp4400 are 4U 19″ systems also build around the zx1 Itanium 2 chipset, with minor changes to the rp3400’s architecture.

The rp3400 series are the defacto successors to the rack-mountable A-Class systems — they use 2U of space in a 19″ rack.

The page on the early PA-RISC history (mid-1980s to early-1990s) has been completely rewritten and greatly expanded, with more details and many corrections.

As fallout from the improved early PA-RISC HP 9000/800 server article much information on the first PA-RISC processors was compiled and added to the PA-RISC processors page.

In the mid- to late-1990s Winbond Electronics designed and sold a range of 32-bit PA-RISC embedded processors, targeted at set-top boxes and Internet Appliances.

The OpenPA Print Edition, available in two versions as PDF, was updated with new content and corrections from about Summer 2006 till Fall 2007.

Support for the newer 64-bit PA-8x00 systems has been recently added to OpenBSD/hppa.

Operational note: OpenPA can now also be reached via IPv6.

A second attempt at a page detailing the roots and origins of PA-RISC has been made, starting with a subsection on the (very) early days of PA-RISC processors and systems at the time of the original PA 1.0 architecture, including lesser known CPUs as TS,…

A first edition of a complete, offline viewable version of the OpenPA Project is available as a PDF book.

The Mako is the integration of two PA-8700+ processor cores onto a single die in combination with a very large off-die 32MB L2 cache, placed on the CPU module.

The PA-8900 is more or less only a slightly improved PA-8800 (Mako) and will supposedly be the last processor of HP's PA-RISC family.

The C8000 is probably the last PA-RISC powered HP-UX workstation, featuring one or two of the dual core PA-8800 or PA-8900 processors.

The ports of the now rather unknown MkLinux (Linux based on Mach-Kernel) and HPBSD operating systems to early HP PA-RISC hardware were among the first non-commercial, usable OS offerings besides HP-UX.

HP was the first to introduce Single Instruction Multiple Data (SIMD) instructions tailored for the accelation of multimedia applications on a general purpose processor.

The CSS definitions for print media were greatly reworked to produce a much smoother and more readable output when printed out.

The existing stylesheet for screen media was greatly reworked to increase the usability of the site.

FOCUS was one of HP's first tries to design and implement a CPU architecture and was used in the HP 9000/500 series.

Through the use of so-called shortcuts the model pages of the various PA-RISC computers can be directly accessed.

Information on the SCSI-bus, -chips and -adapters used in in HP PA-RISC based computers, compiled on a single page.

Descriptions of some of the graphics adapters that were frequently used in HP PA-RISC based workstations.

The page describing the various i960 and MIPS-based X-Terminals from HP has been rewritten and restructured greatly to provide more and clearer information.

The A400 and A500 in its various incarnations were the 64-bit successors to the popular A180 rack-servers, sharing a very similar 2U 19" case.

The 748i and 748 were the integration of 743i and 744 VME PA-RISC boards into a ruggedized case, for industrial applications.

The old navigation and page scheme was thrown out in favor of a completely new designed CSS-based site structure.

Collection of the the available benchmarks results for PA-RISC systems, including SPEC 92, 95 and 2000 cpu and rate.

Discusses various microarchitecture technologies and features employed in the PA-RISC CPU architecture.

Description of the latest shipping PA-RISC CPU before the upcoming PA-8800.

Better in-depth explanations of Stratus' fault-tolerant PA-RISC servers.