
HP 9000/720, 730 & 750 Internals
Intel 82350 EISA bus adapter chipset (EISA to GSC)
Buses
PBus processor/memory bus at processor clock (720: 50MHz with 200MB/s, 730/750: 66MHz
with 264MB/s)
VSC main system bus at 0.5 of processor clock (720: 25MHz with 100MB/s, 730/750: 33MHz
with 132MB/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
Memory
HP proprietary memory modules (some shared with 735/755)
720: 8 slots
730: 8 slots and 16MB onboard
272MB (8×32+16) maximum
750: 12 slots
768MB (12×64) maximum
Expansion
720/730:
– one SGC (DIO-II formfactor) expansion slot
– one EISA slot
750:
– Two SGC (DIO-II formfactor) expansion slots
– Four EISA slots
Drives
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
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