Before the age of Starlink size satellite fleets (which are below the van Allen belts anyway), radiation hardened CPUs fell into the last of these four categories:
* Zero cost like microcontrollers
* Zero time to perform tasks
* Zero power like mobile and IoT today
* Zero units including military stuff
As long as the max power draw isn't really high, and waste heat is generally useful for outer system stuff, I don't see any reason not to make such CPUs generally capable. Closer to the zero time set, while of course they're zero units, I remember a typical prices of $100K each which is cheap for their types of missions.
Brave AI agrees with my memory: https://search.brave.com/search?q=rad+hard+cpus
Of course that doesn't count the early stuff in the 1970s when eight bit CPUs were the cutting edge of what you could do in a single chip, like the rad hard RCA 1802 which may still be in production:
https://search.brave.com/search?q=is+the+rad+hard+RCA+1802+still+in+production
Sinistra delenda est.
npub13r…m3jlt
2026-04-07 00:07:34 UTC
in reply to nevent1q…kd4t
Author Public Key
npub13rp7r4aglr7nlktkj0k4y3m2trxv0ulphu4pm7qv3w0vwnvzntjsvm3jltSeen on
wss://relay.momostr.pinkPublished at
2026-04-07 00:07:34 UTCEvent JSON
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