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The Advanced Technology Airborne Computer (ATAC) was a product of Itek (a division of Litton Industries), used on US naval aircraft, and the NASA Galileo (spacecraft).
The ATAC was built using AMD 2901 4-bit processors and had a basic cycle time of 250 ns. It could be programmed in HAL/S, and could be microprogrammed to add new instructions. The Galileo project added four instructions.
Use on US Naval aircraft
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Use by Galileo project
The Galileo Attitude and Articulation Control System (AACSE) was controlled by two Itek Advanced Technology Airborne Computers (ATAC), built using radiation-hardened 2901s. The project wrote their own GRACOS (Galileo realtime Attitude Control Operating System).
The Galileo project had radiation-hardened 2901 processors made (by Sandia National Lab) for the spacecraft.
References
- ^ Tomayko, James E. (March 1988). Computers in Spaceflight: The NASA Experience (PDF) (Report). NASA History Office. Retrieved 29 October 2020.
Further reading
- Tomayko, James E. (March 1988). "Computers in Spaceflight: The NASA Experience". Distributed Computing On Board Voyager and Galileo. NASA. Retrieved August 26, 2014.
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