Chapter 4 PA-RISC Computer Systems - OpenPA.net

HP 9000/725
4.7 HP 9000/725
4.7.1 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).
4.7.2 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)
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