Two of them went past Pluto in 2015, inside the LORRI and PEPSSI instruments on New Horizons, running (of course) flight software in FORTH. At least one more was aboard MESSENGER at Mercury, in the MASCS instrument. That is a processor architecture with legsā¦ :-) See pp. 17 of:
http://www.boulder.swri.edu/pkb/ssr/ssr-lorri.pdf - Mark 210-522-6025 office 210-379-4635 cell On Apr 10, 2017, at 6:54 PM, dwight via cctalk <cctalk@classiccmp.org> wrote: > Harris made the RTX-2000 in a rad hardened form so they were commonly used > for satellites.