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. https://www.

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. https://www.youtube.com/watch?v=2BIx2x-Q2fE https://www.youtube.com/watch?v=2BIx2x-Q2fE