Sandia National Labs SA3000 8085 CPU

And 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/RAD5500

2, https://web.archive.org/web/20190226111129/https://www.baesy...

> Back in the late 1970’s and early 1980’s Sandia National Laboratory (in Albuquerque NM USA) began building the capacity to design, fab, and test IC’s at scale (packaging was handled by Fairchild and Allied Signal).

We need more of this kind of thing, generally: government agencies building up in-house technical capability, instead of outsourcing everything to contractors.

For instance: there should be a government-controlled pharmaceutical manufacturer of last resort. The clear benefits would be to provide extra capacity and prevent things like Martin Shkreli's scams with Retrophin/Turing Pharmaceuticals (https://en.wikipedia.org/wiki/Martin_Shkreli#Thiola_price_hi...).

Very 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”

Interesting 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.

> 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.

This 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