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Do you have a citation for that? The Space Shuttle Avionics System top level documentation specifically calls out having "no Z80's, 8086s, 68000's, etc." http

• kristopolous 3y ago
  Intel claims they did. https://twitter.com/intel/status/497927245672218624?lang=en https://twitter.com/intel/status/497927245672218624?lang=en although what's that word "some" doing in there... And also, sigh, to demonstrate once again that when I worked in space it was 20 years ago, https://www.nytimes.com/2002/05/12/us/for-parts-nasa-boldly-goes-on-ebay.html https://www.nytimes.com/2002/05/12/us/for-parts-nasa-boldly-... (https://web.archive.org/web/20230607141742/https://www.nytimes.com/2002/05/12/us/for-parts-nasa-boldly-goes-on-ebay.html https://web.archive.org/web/20230607141742/https://www.nytim...) Knowing how 8086 timing and interrupts worked was still important for what I was doing in the early 2000s. I don't pretend to remember any of it these days.