The HP 9000 brand was introduced in 1984 to encompass several extant technical workstation models launched formerly in the early 1980s. Most of these were based on the Motorola 68000 series, but there were also entries based on HP's own FOCUS designs. From the mid-1980s, the line was transitioned to HP's new PA-RISC architecture. Finally, in the 2000s, systems using the IA-64 were added.
The HP 9000 server line was discontinued in 2003, being superseded by Itanium-based Integrity Servers running HP-UX. The HP 9000 workstation line was discontinued in 2009, being superseded by HP Z.
History
HP 9000 model J6000 system board
The first HP 9000 models comprised the HP 9000 Series 200 and Series 500 ranges. These were rebadged existing models, the Series 200 including various Motorola68000 (68k) based workstations such as the HP 9826 and HP 9836, and the Series 500 using HP's FOCUSmicroprocessor architecture introduced in the HP 9020 workstation. These were followed by the HP 9000 Series 300 and Series 400 workstations which also used 68k-series microprocessors. From the mid-1980s onward, HP began changing to its own microprocessors based on its proprietary PA-RISCinstruction set architecture (ISA), for the Series 600, 700, 800, and later lines. More recent models use either the PA-RISC or its successor, the HP–Intel IA-64 ISA.
All of the HP 9000 line run various versions of the HP-UXoperating system, except earlier Series 200 models, which ran standalone applications or the Basic Workstation / Pascal 3.1 Workstation[1] operating systems. HP released the Series 400, also known as the Apollo 400, after acquiring Apollo Computer in 1989. These models had the ability to run either HP-UX or Apollo's Domain/OS.
From the early 1990s onward, HP replaced the HP 9000 Series numbers with an alphabetical Class nomenclature. In 2001, HP again changed the naming scheme for their HP 9000 servers. The A-class systems were renamed as the rp2400s, the L-class became the rp5400s, and the N-class the rp7400s. The rp prefix signified a PA-RISC architecture, while rx was used for IA-64-based systems, later rebranded HPE Integrity Servers.
In 2003, HP launched the xw series, which uses x86 processors and runs Windows. The xw series remained until 2009 when it was replaced by HP Z.
On 30 April 2008, HP announced end of sales for the PA-RISC-based HP 9000. The last order date for PA-RISC-based HP 9000 systems was 31 December 2008 and the last ship date was 1 April 2009. The last order date for new HP 9000 PA-RISC options was December 31, 2009, with a last ship date of 1 April 2010. HP intends to support these systems through to 2013, with possible extensions.[2]
The end of life for HP 9000 also marks the end of an era, as it essentially marks HP's withdrawal from the Unix workstation market (the HP 9000 workstations are end of life, and there are no HP Integrity workstations, so there is no longer a solution which targets HP/UX at the desktop). When the move from PA-RISC (9000) to Itanium (Integrity) was announced, Integrity workstations running either HP/UX or Windows were initially announced and offered, but were moved to end of sales life relatively quickly, with no replacement (arguably because x86-64 made IA-64 uncompetitive on the desktop, and HP/UX does not support x86-64, with HP offering desktop Linux as an alternative, not fully compatible, solution).
1 MBit Magnetic bubble memory board from early HP 9000/200 series computer
The Series 200 workstations originated before there were any "Series" at HP. The first model was the HP 9826A, followed by the HP 9836A. Later, a color version of the 9836 (9836C) was introduced. There was also a rack-mount version, the HP 9920A. These were all based on the Motorola 68000 chip. There were 'S' versions of the models that included memory bundled in. When HP-UX was included as an OS, there was a 'U' version of the 9836s and 9920 that used the 68012 processor. The model numbers included the letter 'U' (9836U, 9836CU, and 9920U). Later versions of the Series 200's included the 9816, 9817, and 9837. These systems were soon renamed as the HP Series 200 line, before being renamed again as part HP 9000 family, the HP 9000 Series 200.
There was also a "portable" version of the Series 200 called the Integral. The official model was the HP9807. This machine was about the size of a portable sewing machine, contained a MC68000 processor, ROM based HP-UX, 3½ inch floppy disk drive, inkjet printer, a keyboard, mouse, and an electroluminescent display similar to the early GRiD Compass computers. It was not battery powered, and unlike the other Series 200's that were manufactured in Fort Collins, Colorado, it was made in Corvallis, Oregon.
The Series 300 workstations were based around Motorola 68000-series processors, ranging from the 68010 (Model 310, introduced 1985[3]) to the Motorola 68040 (Model 38x, introduced 1991[4]). The Series 400 (introduced 1990[5]) were intended to supersede the Apollo/Domain workstations and were also based on the 68030/040. They were branded "HP Apollo" and added Apollo Domain/OS compatibility. The suffix 's' and 't' used on the Series 400 represented "Side" (as in Desk side) and "Top" (as in Desk top) model. The last two digits of the Series 400 originally was the clock frequency of the processor in MHz (e.g. 433 was 33MHz). At introduction, the Series 400 had a socket for the MC68040, but since they were not available at the time, an emulator card with an MC68030 and additional circuitry was installed. Customers who purchased systems were given a guaranteed upgrade price of $5,000USD to the MC68040, when they became available. The Series 300 and 400 shared the same I/O interface as the Series 200. The 32-bit DIO-II bus is rated at 6MB/s.[6]
Series 500
The Series 500s were based on the HP FOCUS microprocessor. They began as the HP 9020, HP 9030, and HP 9040, were renamed the HP Series 500 Model 20, 30, and 40 shortly after introduction, and later renamed again as the HP 9000 Model 520, 530 and 540. The 520 was a complete workstation with built-in keyboard, display, 5.25-inch floppy disk, and optional thermal printer and 5MB hard disk. The 520 could run BASIC or HP-UX and there were three different models based on the displays attached (two color and one monochrome). The 530 was a rackmount version of the Series 500, could only run HP-UX, and used a serial interface console. The 540 was a 530 mounted inside a cabinet, similar to the disk drives offered then and included a serial multiplexer (MUX). Later models of the Series 500s were the 550 and 560, which had a completely different chassis and could be connected to graphics processors. The processors in the original Series 500s ran at 20MHz, and could reach a benchmark speed of 1 million instructions per second (MIPS), equivalent to a VAX-11/780, then a common benchmark standard. They could be networked together and with 200 and 300 series using the Shared Resource Manager (SRM).
Because of their performance, the US government placed the 500 series on its export restricted list. The computers were only permitted to be sold in Western Europe, Canada, Australia, and New Zealand, with any other country needing written approval.
Series 700
HP 9000 model 735 running the Common Desktop Environment (CDE) login managerHP 9000 model 735 running HP-UX with CDEHP 9000 model 715HP 9000 model 712 running HP-UX with CDE
The first workstations in the series, the Model 720, Model 730 and Model 750 systems were introduced on 26 March 1991 and were code-named "Snakes". The models used the PA-7000 microprocessor, with the Model 720 using a 50MHz version and the Model 730 and Model 750 using a 66MHz version. The PA-7000 is provided with 128 KB of instruction cache on the Model 720 and 730 and 256 KB on the Model 750. All models are provided with 256 KB of data cache. The Model 720 and Model 730 supported 16 to 64MB of memory, while the Model 750 supported up to 192MB. Onboard SCSI was provided by an NCR 53C700 SCSI controller. These systems could use both 2D and 3D graphics options, with 2D options being the greyscale GRX and the color CRX. 3D options were the Personal VRX and the Turbo GRX.[7]
In early January 1992, HP introduced the Model 705, code-named "Bushmaster Snake", and the Model 710, code-named "Bushmaster Junior". Both systems are low-end diskless workstations, with the Model 705 using a 32MHz PA-7000 and the Model 710 using a 50MHz version. At introduction, the Model 705 was priced at under US$5,000, and the Model 710 under US$10,000.[8]
The first Series 700 workstations were superseded by the Model 715/33, 715/50, 725/50 low-end workstations and the Model 735/99, 735/125, 755/99 and 755/125 high-end workstations on 10 November 1992.[9] The existing Model 715 and Model 725 were later updated with the introduction of the Model 715/75 and 725/75 in September 1993. The new models used a 75MHz PA-7100.[10]
Increasing integration led to the introduction of the Model 712/60 and Model 712/80i workstations on 18 January 1994.[11] Code-named "Gecko", these models were intended to compete with entry-level workstations from Sun Microsystems and high-end personal computers.[12] They used the PA-7100LC microprocessor operating at 60 and 80MHz, respectively. The Model 712/80i was an integer only model, with the floating point-unit disabled. Both supported 16 to 128MB of memory.[13]
The Model 715/64, 715/80, 715/100 and 725/100 were introduced in May 1994, targeted at the 2D and 3D graphics market. These workstations use the PA-7100LC microprocessor and supported 32 to 128MB of memory, except for the Model 725/100, which supported up to 512MB.[14]
The Model 712/100 (King Gecko), an entry-level workstation, and Model 715/100 XC, a mid-range workstation, were introduced in June 1995. The Model 712/100 is a Model 712 with a 100MHz PA-7100LC and 256 KB of cache while the Model 715/100 XC is a Model 715/100 with 1MB of cache.[15]
The Model 712 and 715 workstations feature the Lasi ASIC, connected by the GSC bus. The Lasi ASIC provided an integrated NCR 53C710 SCSI controller, an Intel Apricot 10Mbit Ethernet interface, CD-quality sound, PS/2 keyboard and mouse, a serial and a parallel port. All models, except for the 712 series machines also use the Wax ASIC to provide an EISA adapter, a second serial port and support for the HIL bus.
The SGC bus (System Graphics Connect), which is used in the earlier series 700 workstations, has similar specifications as PCI with 32-bit/33MHz and a typical bandwidth of about 100MB/s .
HP 9000 B180L displaying the CDE login managerHP 9000 C360 displaying the CDE login managerHP 9000 C8000 running HP-UX with CDE
The C100, C110, J200, J210 and J210XC use the PA-7200 processor, connected to the UTurn IOMMU via the Runway bus. The C100 and C110 are single processor systems, and the J200 and J210 are dual processor systems. The Uturn IOMMU has two GSC buses. These machines continue to use the Lasi and Wax ASICs.
The B132L (introduced 1996[19]), B160L, B132L+, B180L, C132L, C160L and C180L workstations are based on the PA-7300LC processor, a development of the PA-7100LC with integrated cache and GSC bus controller. Standard graphics is the Visualize EG. These machines use the Dino GSC to PCI adapter which also provides the second serial port in place of Wax; they optionally have the Wax EISA adapter.
The C160, C180, C180-XP, J280 and J282 use the PA-8000 processor and are the first 64-bit HP workstations. They are based on the same Runway/GSC architecture as the earlier C and J class workstations.
The C200, C240 and J2240 offer increased speed with the PA-8200 processor and the C360 uses the PA-8500 processor.
The B1000, B2000, C3000, J5000 and J7000 were also based on the PA-8500 processor, but had a very different architecture. The U2/Uturn IOMMU and the GSC bus is gone, replaced with the Astro IOMMU, connected via Ropes to several Elroy PCI host adapters.
The B2600, C3600 and J5600 upgrade these machines with the PA-8600 processor. The J6000 is a rack-mountable workstation which can also be stood on its side in a tower configuration.
The C3650, C3700, C3750, J6700 and J6750 are PA-8700-based.
The C8000 uses the dual-core PA-8800 or PA-8900 processors, which uses the same bus as the McKinley and Madison Itanium processors and shares the same zx1 chipset. The Elroy PCI adapters have been replaced with Mercury PCI-X adapters and one Quicksilver AGP 8x adapter.
The D-class are entry-level and mid-range servers that succeeded the entry-level E-class servers and the mid-range G-, H-, I-class servers. The first models were introduced in late January 1996, consisting of the Model D200, D210, D250, D310 and D350.[20] The Model D200 is a uniprocessor with a 75MHz PA-7100LC microprocessor, support for up to 512MB of memory and five EISA/HP-HSC slots. The Model D210 is similar, but it used a 100MHz PA-7100LC. The Model D250 is dual-processor model and it used the 100MHz PA-7100LC. It supported up to 768MB of memory and had five EISA/HP-HSC slots. The Model D310 is a uniprocessor with a 100MHz PA-7100LC, up to 512MB of memory and eight EISA/HP-HSC slots. The Model D350 is a high-end D-class system, a dual-processor, it had two 100MHz PA-7100LCs, up to 768MB of memory and eight EISA/HP-HSC slots.
In mid-September 1996, two new D-class servers were introduced to utilize the new 64-bit PA-8000 microprocessor, the Model D270 uniprocessor and the Model D370 dual-processor. Both were positioned as entry-level servers. They used the 160MHz PA-8000 and supported 128MB to 1.5GB of memory.[21]
In January 1997, the low-end Model D220, D230, D320 and D330 were introduced, using 132 and 160MHz versions of the PA-7300LC microprocessor.[22]
The D-class are tower servers with up to two microprocessors and are architecturally similar to the K-class. They sometimes masquerade as larger machines as HP shipped them mounted vertically inside a large cabinet containing a power supply and multiple disks with plenty of room for air to circulate.
R-class
The R-class is simply a D-class machine packaged in a rack-mount chassis. Unlike the D-class systems, it does not support hot-pluggable disks.
N-class
N-class HP 9000
The N-class is a 10U rackmount server with up to eight CPUs and 12 PCI slots. It uses two Merced buses, one for every four processor slots. It is not a NUMA machine, having equal access to all memory slots. The I/O is unequal though; having one Ike IOMMU per bus means that one set of CPUs are closer to one set of I/O slots than the other.
The N-class servers were marketed as "Itanium-ready", although when the Itanium shipped, no Itanium upgrade was made available for the N class. The N class did benefit from using the Merced bus, bridging the PA-8x00 microprocessors to it via a special adapter called DEW.
The N4000 was upgraded with newer processors throughout its life, with models called N4000-36, N4000-44 and N4000-55 indicating microprocessor clock frequencies of 360, 440, and 550MHz, respectively. It was renamed to the rp7400 series in 2001.
L-class
The L-class servers are 7U rackmount machines with up to 4 CPUs (depending on model). They have 12 PCI slots, but only 7 slots are enabled in the entry-level L1000 system. Two of the PCI slots are occupied by factory integrated cards and cannot be utilized for I/O expansion by the end-user.
The L1000 and L2000 are similar to the A400 and A500, being based on an Astro/Elroy combination. They initially shipped with 360MHz and 440MHz PA-8500 and were upgraded with 540MHz PA-8600.
The L3000 is similar to the N4000, being based on a DEW/Ike/Elroy combination. It shipped only with 550MHz PA-8600 CPUs.
The L-class family was renamed to the rp5400 series in 2001.
A-class
The A180 and A180C were 32-bit, single-processor, 2U servers based on the PA-7300LC processor with the Lasi and Dino ASICs.
The A400 and A500 servers were 64-bit, single and dual-processor 2U servers based on the PA-8500 and later processors, using the Astro IOMMU and Elroy PCI adapters. The A400-36 and A500-36 machines used the PA-8500 processor running at 360MHz; the A400-44 and A500-44 are clocked at 440MHz. The A500-55 uses a PA-8600 processor running at 550MHz and the A500-75 uses a PA-8700 processor running at 750MHz.
The A-class was renamed to the rp2400 series in 2001.
S/X-class
The S- and X-class were Convex Exemplar SPP2000 supercomputers rebadged after HP's acquisition of Convex Computer in 1995. The S-class was a single-node SPP2000 with up to 16 processors, while the X-class name was used for multi-node configurations with up to 512 processors. These machines ran Convex's SPP-UX operating system.
V-class
The V-class servers were based on the multiprocessor technology from the S-class and X-class. The V2200 and V2250 support a maximum of 16 processors, and the V2500 and V2600 support a maximum of 32 processors. The V-class systems are physically large systems that need extensive cooling and three-phase electric power to operate. They provided a transitional platform between the T-class and the introduction of the Superdome.
Apart from HP-UX and Domain/OS (on the 400), many HP 9000s can also run the Linux operating system. Some PA-RISC-based models are able to run NeXTSTEP.
Berkeley Software Distribution (BSD) Unix was ported to the HP 9000 as HPBSD; the resulting support code was later added to 4.4BSD. Its modern variants NetBSD and OpenBSD also support various HP 9000 models, both Motorola 68k and PA-RISC based.
In the early 1990s, several Unix R&D systems were ported to the PA-RISC platform, including several attempts of OSF/1, various Mach ports and systems that combined parts of Mach with other systems (MkLinux, Mach 4/Lites). The origin of these ports were mostly either internal HP Labs projects or HP products, or academic research, mostly at the University of Utah.
One project conducted at HP Laboratories involved replacing core HP-UX functionality, specifically the virtual memory and process management subsystems, with Mach functionality from Mach 2.0 and 2.5. This effectively provided a vehicle to port Mach to the PA-RISC architecture, as opposed to starting with the Berkeley Software Distribution configured to use the Mach kernel infrastructure and porting this to PA-RISC, and thereby delivered a version of HP-UX 2.0 based on Mach, albeit with certain features missing from both Mach and HP-UX. The motivation for the project was to investigate performance issues with Mach related to the cache architecture of PA-RISC along with potential remedies for these issues.[23]
Itanium is a discontinued family of 64-bit Intel microprocessors that implement the Intel Itanium architecture. The Itanium architecture originated at Hewlett-Packard (HP), and was later jointly developed by HP and Intel. Launched in June 2001, Intel initially marketed the processors for enterprise servers and high-performance computing systems. In the concept phase, engineers said "we could run circles around PowerPC...we could kill the x86." Early predictions were that IA-64 would expand to the lower-end servers, supplanting Xeon, and eventually penetrate into the personal computers, eventually to supplant reduced instruction set computing (RISC) and complex instruction set computing (CISC) architectures for all general-purpose applications.
Precision Architecture RISC (PA-RISC) or Hewlett Packard Precision Architecture, is a general purpose computer instruction set architecture (ISA) developed by Hewlett-Packard from the 1980s until the 2000s.
HP-UX is Hewlett Packard Enterprise's proprietary implementation of the Unix operating system, based on Unix System V and first released in 1984. Current versions support HPE Integrity Servers, based on Intel's Itanium architecture.
A workstation is a special computer designed for technical or scientific applications. Intended primarily to be used by a single user, they are commonly connected to a local area network and run multi-user operating systems. The term workstation has been used loosely to refer to everything from a mainframe computer terminal to a PC connected to a network, but the most common form refers to the class of hardware offered by several current and defunct companies such as Sun Microsystems, Silicon Graphics, Apollo Computer, DEC, HP, NeXT, and IBM which powered the 3D computer graphics revolution of the late 1990s.
Convex Computer Corporation was a company that developed, manufactured and marketed vector minisupercomputers and supercomputers for small-to-medium-sized businesses. Their later Exemplar series of parallel computing machines were based on the Hewlett-Packard (HP) PA-RISC microprocessors, and in 1995, HP bought the company. Exemplar machines were offered for sale by HP for some time, and Exemplar technology was used in HP's V-Class machines.
Apollo/Domain is a series of workstations that were developed and produced by Apollo Computer from c. 1980 to 1989. The machines were built around the Motorola 68k series of processors, except for the DN10000, which has from one to four of Apollo's RISC processors, named PRISM.
The HP 3000 series is a family of 16-bit and 32-bit minicomputers from Hewlett-Packard. It was designed to be the first minicomputer with full support for time-sharing in the hardware and the operating system, features that had mostly been limited to mainframes, or retrofitted to existing systems like Digital's PDP-11, on which Unix was implemented. First introduced in 1972, the last models reached end-of-life in 2010, making it among the longest-lived machines of its generation.
GSC is a bus used in many of the HP 9000 workstations and servers. The acronym has various explanations, including Gecko System Connect, Gonzo System Connect and General System Connect.
The HP-HIL is the name of a computer bus used by Hewlett-Packard to connect keyboards, mice, trackballs, digitizers, tablets, barcode readers, rotary knobs, touchscreens, and other human interface peripherals to their HP 9000 workstations. The bus was in use until the mid-1990s, when HP substituted PS/2 technology for HIL. The PS/2 peripherals were themselves replaced with USB-connected models.
HPE Integrity Servers is a series of server computers produced by Hewlett Packard Enterprise since 2003, based on the Itanium processor. The Integrity brand name was inherited by HP from Tandem Computers via Compaq.
The Runway bus is a front-side bus developed by Hewlett-Packard for use by its PA-RISC microprocessor family. The Runway bus is a 64-bit wide, split transaction, time multiplexed address and data bus running at 120 MHz. This scheme was chosen by HP as they determined that a bus using separate address and data wires would have only delivered 20% more bandwidth for a 50% increase in pin count, which would have made microprocessors using the bus more expensive. The Runway bus was introduced with the release of the PA-7200 and was subsequently used by the PA-8000, PA-8200, PA-8500, PA-8600 and PA-8700 microprocessors. Early implementations of the bus used in the PA-7200, PA-8000 and PA-8200 had a theoretical bandwidth of 960 MB/s. Beginning with the PA-8500, the Runway bus was revised to transmit on both rising and falling edges of a 125 MHz clock signal, which increased its theoretical bandwidth to 2 GB/s. The Runway bus was succeeded with the introduction of the PA-8800, which used the Itanium 2 bus.
The Hewlett-Packard FOCUS microprocessor, launched in 1982, was the first commercial, single chip, fully 32-bit microprocessor available on the market. At this time, all 32-bit competitors used multi-chip bit-slice-CPU designs, while single-chip designs like the Motorola 68000 were a mix of 32 and 16-bit.
The HPE Superdome is a high-end server computer designed and manufactured by Hewlett Packard Enterprise. The product's most recent version, "Superdome 2," was released in 2010 supporting 2 to 32 sockets and 4 TB of memory. The Superdome used PA-RISC processors when it debuted in 2000. Since 2002, a second version of the machine based on Itanium 2 processors has been marketed as the HP Integrity Superdome.
HP X-Terminals are a line of X terminals from Hewlett Packard introduced in the early- to mid-1990s, including the 700/X and 700/RX, Envizex and Entria, and the Envizex II and Entria II. They were often sold alongside PA-RISC-based HP 9000 Unix systems. The primary use case was connecting several graphical consoles to a single server or workstation to allow multiple users access the same (expensive) processing system from terminal systems. These X-Terminals all allowed high-resolution, color-graphics access to the main server from which they downloaded their operating system and necessary program files. All models featured limited expandability, in most cases additional I/O options for peripherals and memory for more programs or local storage. HP did not use its own PA-RISC platform for these systems, the first design used an Intel CISC processor, while all later systems used RISC platforms, first Intel i960 and later the popular MIPS.
The Alpha 21064 is a microprocessor developed and fabricated by Digital Equipment Corporation that implemented the Alpha instruction set architecture (ISA). It was introduced as the DECchip 21064 before it was renamed in 1994. The 21064 is also known by its code name, EV4. It was announced in February 1992 with volume availability in September 1992. The 21064 was the first commercial implementation of the Alpha ISA, and the first microprocessor from Digital to be available commercially. It was succeeded by a derivative, the Alpha 21064A in October 1993. This last version was replaced by the Alpha 21164 in 1995.
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). 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). It was used exclusively by PRO members and was not sold on the merchant market. All follow-on PA-8x00 processors are based on the basic PA-8000 processor core.
The PA-7100LC is a microprocessor that implements the PA-RISC 1.1 instruction set architecture (ISA) developed by Hewlett-Packard (HP). It is also known as the PCX-L, and by its code-name, Hummingbird. It was designed as a low-cost microprocessor for low-end systems. The first systems to feature the PA-7100LC were introduced in January 1994. These systems used 60 and 80 MHz clock rates. A 100 MHz part debuted in June 1994. The PA-7100LC was the first PA-RISC microprocessor to implement the MAX-1 multimedia instructions, an early single instruction, multiple data (SIMD) multimedia instruction set extension that provided instructions for improving the performance of MPEG video decoding.
The PA-7100 is a microprocessor developed by Hewlett-Packard (HP) that implemented the PA-RISC 1.1 instruction set architecture (ISA). It is also known as the PCX-T and by its code name Thunderbird. It was introduced in early 1992 and was the first PA-RISC microprocessor to integrate the floating-point unit (FPU) on-die. It operated at 33 – 100 MHz and competed primarily with the Digital Equipment Corporation (DEC) Alpha 21064 in the workstation and server markets. PA-7100 users were HP in its HP 9000 workstations and Stratus Computer in its Continuum fault-tolerant servers.
The HP Precision bus is the data transfer bus of the proprietary Hewlett Packard architecture HP 3000 and later many variants of the HP 9000 series of UNIX systems. This bus has a 32-bit data path with an 8 MHz clock. It supports a maximum transfer rate of 23 MB/s in burst mode. That bus was also used to directly support the Programmable Serial Interface (PSI) cards, which offered multi-protocol support for networking, notably IBM Bisync and similar systems.The 920, 922 and 932 series supported up to three PSI cards, and up to five cards in the 948 and 958 series.
NetServer was a line of x86-based server and workstation computers sold by Hewlett-Packard (HP) from 1993 to 2002. It was Hewlett-Packard's first entry in the commodity local area networking (LAN) market.
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