
HP 9000/745i & 747i VME Workstations
4.12 HP 9000/745i & 747i VME Workstations
4.12.1 Overview
These Pace named models were one of the first PA-RISC workstations for industrial/medical use. They
are technically very similar to the older 715 workstations and 725 workstations while being built in
ruggedized, rack-mountable cases. The CPU and I/O controllers sit on a VME SBC (single board
computer) which is identical on both 745i and 747i. The latter systems are built in an even bigger case
and feature VME slots, which the 745i do not have. Both have a HP-IB interface, which was used
mainly for controlling and/or instrumental use. Interestingly these machines have two pairs of LED
banks, one at the front and the other directly on the CPU board on the back.
4.12.2 Internals
CPU
745i/50: PA-7100 50MHz with 64/64KB off-chip I/D L1 cache
747i/50: PA-7100 50MHz with 64/64KB off-chip I/D L1 cache
745i/100: PA-7100 100MHz with 256/256KB off-chip I/D L1 cache
747i/100: PA-7100 100MHz with 256/256KB off-chip I/D L1 cache
Chipset
ASP chipset, featuring:
– NCR 53C700 8-bit single-ended SCSI-2
– Intel 82596DX 10Mb Ethernet controller
– WD 16C552 parallel
– NS 16550A compatible serial
– 512KB EPROM - the Boot ROM
– 8KB EEPROM for storing system configuration status etc.
– Intel 8042 microprocessor controlling:
*
battery backed RTC
*
system & user timers
*
audio generator
*
HP-HIL interface
*
frontpanel system status LEDs
Viper memory and I/O controller
Intel 82501AD Ethernet transceiver
Intel 82350 EISA bus adapter chipset (EISA to GSC)
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