HP 9000/725

Overview
Internals
External connectors
References
Operating systems
Benchmarks

Quick Facts
CPU	1 PA-7100 (/50, /75) 1 PA-7100LC (/100) 50-100 MHz
Caches	128-512 KB L1
RAM	256 MB
Drives	3 SCSI 1 FD
Expansion	3 EISA (/50, /75) 1 SGC/EISA (/50, /75) 1 EISA (/100) 3 GSC/EISA (/100)
Bandwidth	?
I/O	10E SCSI 2 serial parallel VGA HIL (/50, /75) SMD-10 (/100) audio

Overview

These were designated to be smaller replacements for the old 750 servers while still offering the same amount of I/O options. They are technically based on their 715 workstations counterparts.

Introduced: 1992 (725/50) to 1994 for
$17,895 (725/50).

Internals

CPU

725/50: PA-7100 50 MHz with 64/64 KB off-chip I/D L1 cache
725/75: PA-7100 75 MHz with 256/256 KB off-chip I/D L1 cache
725/100: PA-7100LC 100 MHz with with 1 KB on-chip I L1 and 256 KB off-chip unified I/D L1 cache

The 1 KB on-chip L1 cache on systems with a PA-7100LC is not really a true cache.

Chipset

725/50 and 725/75

ASP chipset.
NCR 53C700 8-bit single-ended SCSI-2
Intel 82596DX 10 Mbit Ethernet controller
WD 16C552 parallel
NS 16550A compatible serial
512 KB EPROM - the Boot ROM
8 KB EEPROM for storing system configuration status etc.
Intel 8042 microprocessor
Intel 82501AD Ethernet transceiver
CRX graphics, 8-bit
CS4215 CODEC for 16-bit stereo audio
Viper memory and I/O controller
Intel 82350 EISA bus adapter chipset (EISA to GSC)

725/100

LASI chipset.
NCR 53C710 8-bit single-ended SCSI-2
Intel 82596CA 10 Mbit Ethernet controller
WD 16C522 compatible parallel
Harmony CD/DAT quality 16-bit stereo audio
NS 16550A compatible serial
Wax chip
- EISA bus converter (GSC-to-EISA)
- Second RS232 serial
- HP-HIL
Artist graphics, 8-bit
Intel 82503 Ethernet transceiver, media auto-selection
CS4215 or AD1849 programmable CODECs
WD37C65C Floppy controller
Two AM29F010 Flash EPROMs

Buses

GSC system-level I/O bus
EISA additional I/O expansion bus
725/50, 725/75: PBus processor/memory bus
725/50, 725/75: VSC main system bus
725/50, 725/75: SGC expansion of the mainbus to the SGC expansion card
SCSI-2 single-ended narrow bus (Fast on 725/100)

Memory

72-pin ECC SIMMs
Takes 8-32 MB modules
Eight sockets
32 MB (2×16) minimum, 256 MB (8×32) maximum

Expansion

725/50, 725/75: Three EISA expansion-slots,
One slot for either a SGC (EISA formfactor) or EISA card.
725/100: One EISA expansion slot,
Three slots for either GSC (EISA formfactor) or EISA cards.

Drives

One tray for one 3.5″ Narrow SE 50-pin SCSI hard drive
One tray for one 3.5″ Floppy drive
Two trays for one half-height 5.25″ Narrow SE 50-pin SCSI drive each, externally accessible

(725/100 supports Fast-Narrow drives)

External connectors

50-pin HD SCSI-2 Narrow SE single-ended (Narrow-fast on 712/100)
Two DB9 male RS232C serial
DB25 female parallel
15-pin AUI 10 Mbit Ethernet
HD15 VGA
725/50, 725/75: HP-HIL connector for input devices
725/100: SMD-10 connector, to connect HIL/PS2 with a special adapter [pic]
Four phone jacks (microphone, headphones, line-in and ?)

References

Operating systems

725/50, 725/75: HP-UX: every release from 10.01-10.20 works.
- 10.20: runs nice on them.
- 11.00: also works, but a) it is unsupported, b) it is slow and c) some HP-UX patches can leave the system in an unrunnable state.
725/100: HP-UX: every 32-bit release from 10.01-11.11 works.
- 10.20: runs very nice.
- 11.00 and 11i: you should get the maximum of RAM. 10.20 is probably faster though.
NeXTSTEP: Version 3.3 works fine.
Linux: works.
OpenBSD: works
NetBSD: experimental support as of 5/2005.

Benchmarks

Model	SPEC95, int	SPEC95, fp
725/50	1.53	2.46
725/75	2.51	3.85
725/100	3.76	4.06

Compare these with other results on the Benchmarks page.

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