HP 9000/720, 730 & 750
|Caches||384-512 KB L1|
|RAM||272 MB (730)
|Drives||2 SCSI (720/730)
4 SCSI (750)
|Expansion||1 SGC, 1 EISA (720/730)
2 SGC, 4 EISA (750)
|Bandwidth||CPU 264 MB/s (730/750)
CPU 200 MB/s (720)
Sys 132 MB/s (730/750)
Sys 100 MB/s (720)
These machines were the first PA-RISC workstations, called the Snakes, and were
based on the first PA-RISC 1.1 processors.
They were built into very solid cases, consisting of interlocking
exchangeable modules (
The storage subsystem has its own
slider, connected to the main I/O board with a short external cable.
The 720 and 730 share the same backplane and I/O board and can be upgraded through
the exchange of the CPU board.
Later HP 9000/735 workstations share a similar system setup and
720/730 CPU and I/O boards can be swapped together for 735 boards, and vice versa
(as 735 I/O boards do not work with 720 CPU boards, both boards have to be exchanged).
- 720: PA-7000 50 MHz with 128/256 KB off-chip I/D L1 cache
- 730: PA-7000 66 MHz with 128/256 KB off-chip I/D L1 cache
- 750: PA-7000 66 MHz with 256/256 KB off-chip I/D L1 cache
- ASP chipset, featuring:
- 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
- Viper memory and I/O controller
- Intel 82C501AD Ethernet transceiver
- Intel 82350 EISA bus adapter chipset (EISA to GSC)
- PBus processor/memory bus at processor clock (720: 50 MHz with 200 MB/s, 730/750: 66 MHz with 264 MB/s)
- VSC main system bus at 0.5 of processor clock (720: 25 MHz with 100 MB/s, 730/750: 33 MHz with 132 MB/s)
- GSC system-level I/O bus
- EISA additional I/O expansion bus
- SGC expansion of the mainbus to the SGC expansion cards
- SCSI-2 narrow single-ended bus
- HP proprietary memory modules (some shared with 735/755)
- 720: 8 slots
- 730: 8 slots and 16 MB onboard
272 MB (8×32+16) maximum
- 750: 12 slots
768 MB (12×64) maximum
- one SGC (DIO-II formfactor) expansion slot
- one EISA slot
- Two SGC (DIO-II formfactor) expansion slots
- Four EISA slots
- 720/730: one tray for two 3.5″ Narrow SE 50-pin SCSI hard drives
- 750: one tray for two half-height 5.25″ Narrow SE 50-pin SCSI drives and two trays for one full-height 5.25″ Narrow SE 50-pin SCSI drive each
- 50-pin HD SCSI-2 single-ended
- Two DB9 male RS232C serial (up to 115200 baud)
- DB25 female parallel
- 15-pin AUI 10 Mbit & 10Base2 BNC Ethernet
- Graphics depend on installed SGC framebuffer
- HP-HIL connector for input devices
- Jack for beep audio
- Midrange PA-RISC Workstations with Price/Performance Leadership (.pdf) pp. 6-11 Andrew J. DeBaets and Kathleen M. Wheeler (August 1992: Hewlett-Packard Journal)
- HP-UX: every release from 10.01-10.20 works.
- Linux: works.
- OpenBSD: works.
|Model||SPEC92, int||SPEC92, fp||SPEC95, int||SPEC95, fp|
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