Chapter 4 PA-RISC Computer Systems - OpenPA.net

HP 9000/705 & 710
4.3 HP 9000/705 & 710
4.3.1 Overview
The HP 9000/705 and HP 9000/710 are miniaturized versions of the original PA-RISC “Snakes” (720,
730 and 750). The internals of these basically were taken over, with some significant changes:
� Smaller I/D caches
� Lower CPU clock rate
� Different (narrower) connection to the memory subsystem
� Integration of several subsystems (graphics, SCSI, Ethernet) onto a single mainboard
� Reduced expansion possibilities
Introduced: 1992 for $7,490 (HP 9000/710)
4.3.2 Internals
CPU
� 705: PA-7000 35 MHz with 32/64 KB off-chip I/D L1 cache
� 710: PA-7000 50 MHz with 32/64 KB off-chip I/D L1 cache
Chipset
� ASP chipset
– NCR 53C700 8-bit single-ended SCSI-2
– Intel 82596DX 10 Mbit Ethernet controller
– WD16C552 parallel
– NS16550A compatible serial
– 512 KB EPROM - the Boot ROM
– 8 KB EEPROM for storing system configuration status etc.
– Intel 8042 microprocessor controlling:
* battery backed RTC
* system & user timers
* HP-HIL interface
* frontpanel system status LEDs
� Viper memory and I/O controller, low-cost version implemented in two chips
� Intel 82C501AD Ethernet transceiver
� PSB2160 CODEC for 8-bit mono audio
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