June 29, 2026
Nukes, space, and a tiny old brain
Sandia National Labs SA3000 8085 CPU
How an old-school chip for space and nukes sparked awe, nitpicks, and "wait, WTF?"
TLDR: Sandia built a super-tough 8085-based chip for space missions and nuclear weapons, and it stayed reliable in extreme radiation. Commenters were torn between admiration for the engineering, shock at how old the tech was, and arguments over whether parts of the write-up were sloppy or exaggerated.
A blast from the Cold War past just dropped: Sandia National Labs built a radiation-tough version of Intel’s ancient 8085 chip so it could survive space missions and even nuclear warheads. On paper, that’s already a wild story — a government lab making special computer chips because normal ones would fry in extreme conditions. But in the comments, the real show began, with readers swinging between genuine amazement, nerdy fact-checking, and full-on “excuse me, they used what in a warhead?” energy.
The biggest mood? A mix of respect and disbelief. One commenter basically summed up the vibe as “remarkable” meets “wtf”, joking that world-ending weapons were being guided by something with the computing feel of an old home computer. That joke landed because it’s both funny and unsettling: this wasn’t some sci-fi superchip, but a ruggedized relic built to keep working while humans absolutely would not. Others loved the sheer engineering obsession, even if they admitted the article’s dense wording felt like a jargon avalanche. And then came the classic internet plot twist: the nitpick brigade. One reader called the write-up “slop,” complained about the scientific notation, and pulled receipts with a source link. Another threw shade at the claim that 50,000 chips were needed for the Galileo mission, basically saying, “for one probe? Be serious.”
Still, the thread wasn’t all side-eye. Some zoomed out to today’s radiation-proof chips and marveled that modern space hardware now uses IBM POWER-based processors. So yes, the history lesson landed — but only after the comments turned it into a delightful pileup of awe, skepticism, and dark humor.
Key Points
- •Sandia National Laboratories developed internal IC design and fabrication capabilities to produce radiation-hardened chips for weapons systems and space missions that were not available commercially.
- •By 1982, Sandia had upgraded its fab to 4-inch wafers with 2-micron features and used that capability to produce radiation-hardened ICs for the Galileo space probe, including an RCA 1802 derivative.
- •Sandia converted the Intel 8085 from HMOS to a CMOS radiation-hardened design, creating the SA3000 with about 18,000 transistors on a 3-micron process.
- •The SA3000 used specific hardening techniques such as n-on-n+ epitaxial substrate, guard rings, hardened oxides, and frequent substrate and well contacts to improve latchup control and radiation tolerance.
- •According to the article, the SA3000 was deployed in the W88 warhead and Trident II systems and was also used in Ball Aerospace hardware and on the CRRES satellite.