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PA-RISC Chipsets

ASP system design

HP 9000 workstations and servers based on the 32-bit PA-7000 and PA-7100 processors use the ASP chipset and Viper memory controller. They utilize the VSC CPU/memory, GSC system main and SGC and EISA expansion buses, with servers using HP-PB I/O buses, all provided by separate I/O adapters/bus bridges.

View a single-CPU system design and one for multi-CPU.

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ASP

ASP is the chipset used in many older 32-bit PA-RISC workstations with SGC bus and PA-7000 and PA-7100 processors. Being an integrated chipset, ASP includes separate chips to provide the I/O subsystem and contains several modules from third-party vendors.

There are two variants of ASP: Coral or Cobra I/O subsystem, is the original ASP and ASP2 Hardball, an improved design with fast/wide SCSI and FDDI networking, apparently used only on the 735/755 workstations.

Details

ASP2 additional features

Used in

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Viper

Viper is the memory and I/O controller MIOC on systems with PA-7000 and PA-7100 processors. The chip is similar on both, and sometimes counted into the ASP I/O chipset. It handles all memory and I/O traffic between the processor and the rest of the system.

Details

Used in

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References

  1. Midrange PA-RISC Workstations with Price/Performance Leadership (.pdf) Andrew J. DeBaets and Kathleen M. Wheeler (August 1992: Hewlett-Packard Journal) pp. 6-11
  2. VLSI Circuits for Low-End and Midrange PA-RISC Computers (.pdf) Craig A. Gleason (August 1992: Hewlett-Packard Journal) pp. 12-22
  3. High-Performance Design for Low-Cost PA-RISC Desktops (.pdf) Craig Fink et al (August 1992: Hewlett-Packard Journal) pp. 56-63
  4. Hardball I/O Subsystem, External Reference Specification (.pdf) Hewlett-Packard Company (September 1991, Version 1.1)
  5. The EISA standard for the HP 9000 Series 700 workstations (.pdf) Vicente Cavanna and Christopher S. Liu (December 1992, Hewlett-Packard Journal) pp. 78
  6. Midrange PA-RISC Workstations with Price/Performance Leadership (.pdf) pp. 6-11 Andrew J. DeBaets and Kathleen M. Wheeler (August 1992: Hewlett-Packard Journal)
  7. VLSI Circuits for Low-End and Midrange PA-RISC Computers (.pdf) pp. 12-22 Craig A. Gleason (August 1992: Hewlett-Packard Journal)
  8. High-Performance Design for Low-Cost PA-RISC Desktops (.pdf) pp. 56-63 Craig Fink et al (August 1992: Hewlett-Packard Journal)