4 ms·
I'm not sure if there's a RAD hard z80 variant. They've got their own chips and protocols going back just as far, like https://en.wikipedia.org/wiki/MIL-STD-15
by monocasa 3y ago
I'm not sure if there's a RAD hard z80 variant.
They've got their own chips and protocols going back just as far, like https://en.wikipedia.org/wiki/MIL-STD-1553 https://en.wikipedia.org/wiki/MIL-STD-1553
- kristopolous 3y agoThe space shuttle used both z80 and 8086 until it ended in 2011. The international space station runs on among other chips, 80386SX-20s. IBM/BAE also has a few RADs based on POWER chips.
- monocasa 3y agoDo 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." https://ntrs.nasa.gov/api/citations/19900015844/downloads/19900015844.pdf https://ntrs.nasa.gov/api/citations/19900015844/downloads/19...
- kristopolous 3y agoIntel 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.