794K views · Nov 30, 2017 · 9:20 · 1 HN recommender · 3 mentions · discussed 2017–2023
Cliff Stoll shows and explains his two Friden EC-132 electronic calculators for Numberphile. The video covers how these early machines worked, including their unusual acoustic delay line memory.
Why Hacker News points people here: It is the go-to visual explanation of delay-line memory and early electronic calculators whenever the topic comes up.
“There is also a fantastic video where Cliff Stoll describes the Friden EC-132 calculator and shows off its acoustic delay line here”HN comment, 2017
“There is also a fantastic video where Cliff Stoll describes the Friden EC-132 calculator and shows off its acoustic delay line here”
Cliff Stoll shows Friden EC-132's acoustic delay line.
There is also a fantastic video where Cliff Stoll describes the Friden EC-132 calculator and shows off its acoustic delay line here: this video
“It was the Friden ec-132”
Shows Friden EC-132 storing bits in vibrating wire.
Cool way to store the bits. I saw the other day a video about an old eletronic calculator that stores itens in memory usinglike a piano wire, and microfones, and small speakers, to make the cord vibrate, and store the value. It was the Friden ec-132 this video
“There were a lot of delay–line memories back in the day.”
Illustrates delay-line memory from before memory chips.
There were a lot of delay–line memories back in the day. It wasn’t just that they didn’t have memory chips; memory chips hadn’t been invented yet. this video
