A software engineer has reconfigured the only remaining Apollo Guidance Computer (AGC) that still works to mine for bitcoin. Tinkerer Ken Shirriff, who has an extensive back catalogue of system restorations and reverse engineering for famous legacy technology, took on a project to restore the 52-year-old guidance computer which was used on-board each Apollo command module (CM) and Apollo Lunar Module (LM) during the Famous NASA space program – including the first Moon landing in 1969. However, Shirriff isn’t planning on reaching the moon, instead, he’s hacked the computer to mine for the bitcoin cryptocurrency – with mixed results.
“Now that we have the world’s only working AGC, I decided to write some code for it,” Shirriff wrote in his blog. “Trying to mine Bitcoin on this 1960s computer seemed both pointless and anachronistic, so I had to give it a shot.
“Implementing the Bitcoin hash algorithm in assembly code on this 15-bit computer was challenging, but I got it to work. Unfortunately, the computer is so slow that it would take about a billion times the age of the universe to successfully mine a Bitcoin block.”
It’s often said that the CPU in the Apollo vehicles wouldn’t power a modern smartphone, but it was actually dated long before that by pocket calculators of the 1980s. It doesn’t even have a microprocessor since it was built years before they were developed. As such, its capability for modern tasks – like mining cryptocurrency from a CPU – is very limited. To put it in perspective, a $70 USB stick miner performs 130 billion hashes per second.
Shirriff’s efforts are shown in a YouTube video where the results are displayed on a custom made DSKY (Display/Keyboard) because he wasn’t able to find an original DSKY that worked.
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