PA-RISC Processors
PA-8900 processor
Overview
The PA-8900 is a slightly tweaked PA-8800 PA-RISC processor with a doubled L2 cache and higher clock speed, released by HP in 2005 only one year after the PA-8800 as the last PA-RISC processor in its lineup. After HP dropped its line of Itanium workstations the PA-8900-powered C8000 were one of the last HP-UX workstations.
Information on the PA-8900 is limited, as was apparent distribution in the market.
Details
- PA-RISC version 2.0, 64-bit architecture, multi-processor capable, 4-way superscalar
- Two cores and ten functional units per core: 2 integer ALUs, 2 shift/merge units, 2 complete load/store pipelines, 2 Floating Point multiply/accumulate units, 2 Floating Point divide/square root units
- IRB: 56-entry instruction queue/reorder buffer
- TLB: 240-entry fully-associative dual-ported per core
- BTAC: 32-entry Branch Target Address Cache; BHT: 2048-entry Branch History Table per core
- Cache 0.75 MB instruction and 0.75 MB data L1 per core on-chip, 4-way set associative
- Cache 64 MB L2 off-chip
- Cache L2 is shared between the cores, L2 controller is on-chip
- Memory up to 16 TB supported with 44-bit physical addresses
- Memory and I/O controllers are external
- Bi-endian support
- MAX-2 multimedia extensions subword arithmetic for multimedia applications
- Itanium 2 processor bus, 200 MHz clock, 128-bit, 6.4 GB/s bandwidth
- Up to 1.1 GHz clock speed with 1.5 V core voltage
- 23.6×15.5 mm2 die, 317,000,000 FETs, 0.13µ, 8-layer Silicon-on-Insulator CMOS
Used in
- HP 9000 rp3410, rp3440 servers
- HP 9000 rp4410, rp4440 servers
- HP 9000 rp7440, rp8440 servers
- HP C8000 workstations
- HP 9000 L1500-9X (rp5430), L2000-9X (rp5450) servers
- HP 9000 N4000-9X (rp7405, rp7410) servers
- HP 9000 Superdome mainframes (SD16B, SD32B, SD64B)
References
- Overview of the HP 9000 rp3410-2, rp3440-4, rp4410-4, and rp4440-8 Servers (PDF, 700 KB)
- Hewlett-Packard (2005).