NASA Office of Logic Design

NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.

80x86, 80386, 80486, Pentium, and Peripherals


Hubble Space Telescope 486 Processor

The CPU is P/N 5962-9310504QXX an Intel military i486DX2 microprocessor rated at 33MHz.  It is operated at 25 MHz.

Design of a Low-Cost Single Board Computer System for Use in Low-Earth Orbit Small Satellite Missions

Dino B. Milanil
Faculty Advisor - Dr. John Pokoski2
Small Satellite Laboratory
, Institute for the Study of Earth, Oceans & Space, University of New Hampshire

10th Annual AIAA/ Utah State University Conference on Small Satellites


A single-board computer system created specifically to meet the demands of a new generation of small satellite missions is being designed, built and tested by students at the University of New Hampshire. The Satellite Single-Board Computer (SSBC) is an Intel 80C186 based system that is qualified for explicit use in low-earth orbit missions. The SSBC serves as a low-cost, high-c~uality alternative to commercially available systems which are usually very costly and designed for much harsher space environments. These "off-the-shelf" systems are normally out of price range for most very low-cost satellite projects. At the other end of the spectrum, however, are inexpensive commercial-quality computer boards that do not offer any space-hardened characteristics.  These systems are typically not designed to survive the cosmic radiation and extreme temperature levels usually found in low-earth orbit. The SSBC fills in the gap between these two alternatives. It offers a flexible design that is based on the industry standard Intel x86 architecture. It can be used in a variety of applications where total dose be kept at a minimum. The production cost for a complete SSBC flight board is expected to be under $20,000.

80386, 80486, and Peripheral Radiation Data

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Last Revised: February 03, 2010
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