Sandia National Labs SA3000 8085 CPU
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Sandia National Labs SA3000 8085 CPU
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Re: Sandia National Labs SA3000 8085 CPU
#2And 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...
Re: Sandia National Labs SA3000 8085 CPU
#3Very 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”
Re: Sandia National Labs SA3000 8085 CPU
#4This 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
Re: Sandia National Labs SA3000 8085 CPU
#5Interesting 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.
Re: Sandia National Labs SA3000 8085 CPU
#6This 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
Excellent find. And yes, obviously this is slop. 106 rad is exactly nothing for nuclear usage.
Re: Sandia National Labs SA3000 8085 CPU
#7> 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.
Re: Sandia National Labs SA3000 8085 CPU
#8> 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.
That number was probably shaped by minimum production-run requirements, alongside the need for software development units, along with other factors, like the use in Trident II and other quests we may not know about.
Re: Sandia National Labs SA3000 8085 CPU
#9> 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.
That number was probably shaped by minimum production-run requirements, alongside the need for software development units, along with other factors, like the use in Trident II and other quests we may not know about.
> other quests we may not know about.
Back then an interface between terrestrial computer systems and a Zeta Reticulan spacecraft required a small supercomputer on our side.
Re: Sandia National Labs SA3000 8085 CPU
#10And 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/20190…
There have been a number of rad-hard SPARC chips from different vendors tthat have flown along the way, and I know Frontgrade/Gaisler currently sells a SPARC v8 version, which isn't that far behind the 'state of the art' as the e5500 based PPCs from BEA (at least as far as state of the art in space rated, rad-hard processors goes...it's a conservative market). Quite a few rad-hard ARMs out there farther down the performance curve.
Frontgrade also advertises a rad-hard RISC-V, as does Microchip (a PIC64 variant), that I know nothing about, but seems like an inevitable next step. Seems like you could grab some Xilinx rad-hard FPGA and bobs your uncle.