Chapter 4 PA-RISC Computer Systems - OpenPA.net

HP 9000/745i & 747i VME Workstations Internals
Buses
� CRX graphics, 8-bit
� HP-IB controller
� 747i: VME controller
� PSB2160 CODEC for 8-bit mono audio
� PBus processor/memory bus
� VSC main system bus
� GSC system-level I/O bus
� EISA I/O expansion bus
� HP-IB bus (IEEE-488); peripheral bus
� SCSI-2 narrow single-ended bus
� 747i: SGC expansion of the mainbus to the SGC expansion slot
� 747i: VME bus
Memory
� 72-pin ECC SIMM
� 8-32 MB modules (/100 models take 64 MB modules)
� Four sockets
� /50 models: 16 MB (2×8) minimum, 128 MB (4×32) maximum
� /100 models: 16 MB (2×8) minimum, 256 MB (4×64) maximum
Expansion
� 745i:
� 747i:
Drives
– Four EISA expansion slots
– Two EISA expansion slots
– One SGC (DIO-II formfactor) expansion slot
– Six VME slots
� One bay for an external-accessible 5.25″ half-height SCSI drive
� One bay for an external-accessible 3.5″ SCSI drive or floppy
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