PA-RISC information - since 1999

HP 9000/C100 and C110

Quick Facts
Introduced 1995
Period Maturity (III)
CPU PA-7200
100-120 MHz
Cache 256 KB L1
Design U2
Drives 3 SCSI
1 FD
Expansion 1 GSC
Bandwidth CPU 800 MB/s (C100)
CPU 960 MB/s (C110)
Mem 400 MB/s (C100)
Mem 480 MB/s (C110)
I/O ?
I/O 10E
2 serial
2 PS/2

The HP 9000 C100 and C110 are PA-RISC graphics workstations based on the PA-7200 processor and were introduced in 1995. They have a similar case to that of the old HP 9000 735 — built of interlocking modules of the I/O and MPU board.

The 32-bit C100 and C110 were board-upgradable to the 64-bit C160 and C180 for around $7,000 in 1996.

Model Number Introduced Price
C100 9000/777 1995 $19,715
C110 9000/777 1995 $25,715

System architecture


Model CPU Speed L1 Cache
C100 PA-7200 100 MHz 256/256 KB off-chip, 2 KB on-chip assist
C110 PA-7200 120 MHz 256/256 KB off-chip, 2 KB on-chip assist


» View a system-level ASCII-illustration of the system architecture.

System buses


Expansion slots


The disk slider can accomodate up to three SCSI drives and one floppy drive simultaneously, the internal cabling (usually) includes one Wide-SCSI cable with three 68-pin connectors and a HVD-terminator at the end, one Narrow-SCSI with one 50-pin connector and one cable for the floppy.

The Narrow-SCSI cable is normally used for the external-accessible half-height 5.25″ CD/DAT drive, although it is of course also possible to connect a 50-pin SE hard drive. The cable can also be easily replaced with a variant with more connectors to use up to three 50-pin SE hard drives. The PDC can boot off these SE drives.

The Wide-SCSI cable is normally used for the internal 3.5″ 68-pin Fast-Wide high-voltage differential system drives. Up to three hard drives can be installed in the cage, which leaves no room for an external-accessible CD/DAT drive though. The Fast-Wide drives are also bootable from the PDC.

A standard configuration could look like this:

External ports

Operating systems


Model SPEC95, int SPEC95, fp SPECrate95, int SPECrate95, fp
C100 4.98 6.59 44.8 59.4
C110 6.00 8.14 54.0 73.3


Height Width Depth Weight
138mm 539mm 447mm 21kg



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