HP 9000 715 Workstations

Quick Facts
Introduced 1992 and 1994-1995
Period Growth (II)
Maturity (III)
Series 700 Series
CPU (33, 50, 75):
PA-7100 32-bit
(64, 80, 100):
PA-7100LC 32-bit
33-100 MHz
Caches 128 KB-1 MB L1
RAM 192 MB (33)
256 MB (others)
Design ASP (33, 50, 75)
LASI (64, 80, 100)
Drives 2 SCSI
1 SCSI/FD
Expansion 1 SGC (33, 50, 75)
1 GSC (64, 80, 100)
I/O Ethernet
SCSI
2 serial
parallel
VGA
HIL (33, 50, 75)
SMD-10 (64, 80, 100)
audio

HP 9000 715 are 32-bit PA-RISC workstations released by HP in two groups in the mid-1990s. Often used for technical design, CAD/CAM and engineering, 715 workstations were powerful, expandable HP-UX systems and a popular choice of the RISC and Unix-era of the 1990s.

HP 9000 715
© Hewlett Packard 1994

HP 9000 715 were marketed against other Unix workstations of the 90s: SGI Indy, DEC Alpha, IBM RS/6000. With advanced video adapters, 715 were often used for graphics (2D and 3D) and visual design on Unix software.

There were two different 715 designs. Early versions in 1992 used HP ASP chipset with PA-7100 CPUs: 715/33, 715/50 and 715/75 with Apollo branding, the 715/33 being one of the slowest and worst PA-RISC workstations ever.

The second generation in 1994 used integrated HP LASI design and PA-7100LC: 715/64, 715/80, 715/100 and 100XC, close to the pizzabox HP 9000 712. The HP 9000 715/100XC workstation was a rather fast machine for the 1990s.

HP 715/64 running NeXTSTEP
715 NeXTSTEP, Thomas Schanz CC BY-SA 4.0

HP marketed the 1994-vintage LASI HP 9000 715 as supporting bi-endian switching for current and future operating systems, a reference to aborted Windows NT PA-RISC and other 1990s plans for operating systems. 715 workstations did support NeXTSTEP on PA-RISC well.

With easy installation, upgradability, expansion, and serviceability HP 9000 715 were popular Unix computers of the 1990s throughout industry and academia, followed by a second life in the 2000s in hobbyist circles.

HP 9000 715 desktop PA-RISC workstations were followed by HP Visualize B132L et al. and Visualize C110 in 1996.

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System

Processors

System CPU Speed Cache
HP 9000 715/33 PA-7100 PA-RISC 32-bit 33 MHz 128 KB off-chip
HP 9000 715/50 PA-7100 PA-RISC 32-bit 50 MHz 128 KB off-chip
HP 9000 715/64 PA-7100LC PA-RISC 32-bit 64 MHz 1 KB on-chip and 64 KB off-chip
HP 9000 715/75 PA-7100 PA-RISC 32-bit 75 MHz 512 KB off-chip
HP 9000 715/80 PA-7100LC PA-RISC 32-bit 80 MHz 1 KB on-chip and 256 KB off-chip
HP 9000 715/100 PA-7100LC PA-RISC 32-bit 100 MHz 1 KB on-chip and 256 KB off-chip
HP 9000 715/100XC PA-7100LC PA-RISC 32-bit 100 MHz 1 KB on-chip and 1024 KB off-chip

Chipset

715/33, 50 and 75 (first version, ASP)

The first version of HP 9000 715 workstations used PA-7100 processors and an early-1990s HP architecture based on HP LASI chipset and a PBus/VSC design, which was not as highly integrated as the later, LASI-based second 715 design.

HP 715 ASP Architecture
715 ASP, © HP 1992

715/64, 80 and 100 (second version, LASI)

HP 9000 715 workstations with PA-7100LC 32-bit processors use HP LASI, a custom and highly integrated HP chipset, which combines many functions and I/O on a single chip. Together with the on-CPU memory controller (MIOC), this resulted in a very integrated system design.

HP 715 ASP Architecture
715 LASI, © HP 1994

HP LASI was primarily designed for cost-reduction while still providing all required I/O functions in a single chip. It was used as the main system controller in most PA-7100LC and PA-7300LC systems.

System buses

Expansion

Memory

Expansion cards

Storage

Ports

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Operating systems

Unix was the main operating system for HP 9000 715 with good support for HP-UX between HP-UX 9.05 and HP-UX 11.00 or 11i as well as native NeXTSTEP support.

HP 9000 715 were often used in the open source scene of the 2000s, when many 715 became available second or third hand. Most open source systems support them well.

Many research and development operating systems were ported to 715 workstations during the 1990s with broad development support:

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Pictures

HP 9000 715/100 HP 9000 715/100
HP 9000 715/100, © HP 1997
HP 9000 715/100XC HP 9000 715/100XC
HP 9000 715/100XC, Thomas Schanz 2013, CC BY-SA 4.0
HP 9000 715/100 HP 9000 715/100 HP 9000 715/100 HP 9000 715/100
HP 9000 715/100, Thomas Schanz 2010, CC BY-SA 4.0
HP 9000 715/80 HP 9000 715/80 HP 9000 715/80
HP 9000 715/80, Thomas Schanz 2013, CC BY-SA 4.0
HP 9000 715/50 HP 9000 715/50
HP 9000 715/50, Thomas Schanz 2013, CC BY-SA 4.0

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Performance

HP 9000 715 with 32-bit PA-RISC processors were quick, medium-level Unix workstations of the early to mid-1990s. Depending on the CPU, 715 were similar or slightly faster than contemporary MIPS, Alpha, SPARC and Intel designs and usually faster in floating point. Intel’s Pentium Pro and Alpha were eventually much faster than PA-7100/PA-7100LC.

The main competition of HP 9000 715 workstations in the mid-1990s were other technical Unix workstations for CAD/CAM, like faster Sun SPARCstations and DEC AlphaStations, or SGI Indy and Indigo2, which were usually on par or a bit slower, depending the exact RISC processor. PA-RISC and 715 were usually faster than mid-level Pentium PCs.

PA-RISC SPEC scores of HP 9000 computers
System Processor SPEC92
int/fp
SPEC95
int/fp
715/33 PA-7100 33 MHz 32.5 52.4 1.01 1.58
715/50 PA-7100 50 MHz 49.2 78.8 1.53 2.46
715/64 PA-7100LC 64 MHz 80.6 109.4 2.52 3.31
715/75 PA-7100 75 MHz 82.6 127.2 2.51 3.85
715/80 PA-7100LC 80 MHz 96.3 123.2 3.01 3.50
715/100 PA-7100LC 100 MHz 115.1 138.7 3.76 4.06
715/100XC PA-7100LC 100 MHz 132.2 184.6 4.55 4.70
Based on old SPEC92 and SPEC95 archives
System Processor SPEC92
int/fp
SPEC95
int/fp
Intel Alder Pentium Pro 150MHz 276.3 220.0 6.08 5.42
Sun Ultra 1 Sun UltraSPARC 143MHz 215.0 303.0 5.41 7.90
HP 9000 C110 PA-7200 120 MHz 167.0 269.0 6.00 8.14
DEC Alphastation 250 Alpha 21064A 266MHz 198.6 262.5 4.18 6.27
HP 9000 735/125 PA-7150 125 MHz 136.0 201.0 3.97 4.61
IBM RS/6000 43P PowerPC 604 100 MHz 128.0 120.2 3.59 3.20
HP 9000 755/99 PA-7150 99 MHz 109.1 167.9 3.22 4.06
Siemens PCE-5S Intel Pentium 100MHz 96.2 81.2 4.04 2.35
SGI Indy MIPS R4400SC 75MHz 88.1 96.6
DEC AlphaStation 200 DEC Alpha 21064 100MHz 74.6 95.2 1.48 2.79
SGI IRIS Indigo IP20 MIPS R4000 100MHz 57.6 60.3
Digital DECpc XL Intel Pentium 66MHz 51.6 47.5
Sun SPARCstation 10 Sun SuperSPARC 40MHz 50.2 60.2 1.13 1.38
HP 9000 730 PA-7000 66 MHz 47.8 75.4 1.50 2.30
HP Vectra VL2 Intel 486DX4 100MHz 45.8 23.1
DECstation 5000 MIPS R4000 50MHz 43.2 42.1
Siemens PCE-4C Intel 486DX2 66MHz 35.8 16.1
Motorola 8000 Motorola 88100 33MHz 27.7 18.8
SGI IRIS Indigo IP12 MIPS R3000 33MHz 22.4 24.2

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Documentation

Most HP documentation is only available at archive.org and other archives, with most official sources, articles and journals having disappeared in the 2010s.

Manuals

LED messages

Product sheets

ROM update

There is a firmware update available for the 715/64, /80 and /100.

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