Thanks to @tubetime for providing the chip.
References:
An evaluation by JPL summarizing the chip's problems: https://ipnpr.jpl.nasa.gov/progress_report/42-63/63O.PDF
Patent on the chip: https://patents.google.com/patent/US4319325A
Documents: http://www.bitsavers.org/components/intel/2920
Datasheet: https://archive.org/details/2920-16-signal-processor
Article: https://www.worldradiohistory.com/Archive-Electronics/70s/79/Electronics-1979-03-01.pdf#page=105
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