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- haunterAnd if you are curious about the modern radiation hardened CPUs then the current state of the art ones are the MOOG BRE440 [0] and the BAE RAD5500 [1], 5545 [2] being the highest performance multi core one.Even more interesting that they both use the IBM POWER architecture!0, https://www.moog.com/products/avionics/spacecraft-avionics/b...1, https://en.wikipedia.org/wiki/RAD55002, https://web.archive.org/web/20190226111129/https://www.baesy...
- grosswaitVery interesting! Definitely some jargon I’ve not come across before.“The chips were made on a n-on-n+ epitaxial substrate to provide latchup control, extensive guard rings around transistors were used and hardened oxides”
- kjs3Interesting combination of 'remarkable' and 'wtf' that we fling nuclear weapons around with the computational equivalent of a couple of TRS-80s[1]. I can only imagine the sighs of relief from the devs when things like the MIL-STD-1750a and later rad-hard SPARC and PPC variants came along.[1] yes...I know the TRS-80 had a z80, not an 8085. Close enough.
- anonymous_user9This is slop, but perhaps the old-fashioned kind.> An 8085 processor that could handle 1×106 rads of radiation with only a 25% reduction in performance, and 3×106 rads with a 40% drop.Hmm, from where did they copy-paste this mangled scientific notation?Ah here we are, pg. 37 (46 in PDF file): https://apps.dtic.mil/sti/tr/pdf/ADA063902.pdf
- egorfine> Galileo space probe [..] How many IC’s were needed? Over 50,000 for the probe itself, backups, testing chips etc.I seriously doubt you need to fabricate 50k CPUs for a single space probe, including backups, testing chips, etc.