PA-7100

The PA-7100 is a microprocessor developed by Hewlett-Packard (HP) that implemented the PA-RISC 1.1 instruction set architecture (ISA). It is also known as the PCX-T and by its code-name Thunderbird. It was introduced in early 1992 and was the first PA-RISC microprocessor to integrate the floating-point unit (FPU) on-die. It operated at 33 - 100 MHz and competed primarily with the Digital Equipment Corporation (DEC) Alpha 21064 in the workstation and server markets. PA-7100 users were HP in its HP 9000 workstations and Stratus Computer in its Continuum fault-tolerant servers.

Die shot of PA-7150
A PA-7150 microprocessor

It was based on the PA-7000 (PCX-S) chip set, a previous PA-RISC implementation consisting of a microprocessor and FPU. The PA-7100 contains 850 000 transistors and measures 14.3 x 14.3 mm for an area of 204.49 mm². It was fabricated by HP in their CMOS26B process, a 0.8 μm complementary metal–oxide–semiconductor (CMOS) process. The PA-7100 is packaged in a 504-pin ceramic pin grid array that has a copper-tungsten heat spreader.

An improved PA-7100, the PA-7150 was introduced in 1994. It operated at 125 MHz, due to improved circuit design. It was fabricated in the same CMOS26B process as the PA-7100.

Both microprocessors were fabricated at HP's Corvallis, Oregon and Fort Collins, Colorado fabrication plants.[1]

The PA-7100LC and PA-7200 microprocessors were also based on the PA-7100.[2][3]

Notes
  1. DeTar, "HP spins PA-RISC architecture; part of five-year roadmap".
  2. Chan, "Design of the HP PA 7200 CPU".
  3. Gwennap, "PA-7200 Enables Inexpensive MP Systems".
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gollark: An actual employee? No. We'll use HTech™ Personality Constructs™.
gollark: Also, to help with sleep monitoring, it will ship with an optional EEG headset.
gollark: A what? No, this is the osmarksßßsmartwatch™.
gollark: Anyway, the osmarksßßsmartwatch™ will also incorporate the latest sensor technology, like an accelerometer, a compass for some reason also, a thermometer, a barometer, a humidity sensor, a light level/UV/IR sensor, an ultrasonic distance sensor, a regular microphone, an irregular microphone, lidar, radar, an infrared thing, two incompatible software defined radios, that one weird IC some company made for some reason to detect lightning strikes nearby, a spectrometer, LEDs abused as photodetectors, a DVD player (DVDs must be shrunken or trimmed before use), a portable DNA sequencer, a multi-axis Hall effect sensor, phased array satellite transceivers, atmospheric bismuth concentration meters, an apiometer, a mouse trackball, an optical mouse (miniaturized), a full 22-key keyboard, 3 dedicated hardware buttons, a fan noise detector and estimator, and a blood oxygen concentration reader.

See also

References
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