4 ms·

Fun fact: a CRT was the first RAM! https://www.computerhistory.org/storageengine/williams-demonstrates-crt-storage/ https://www.computerhistory.org/storageengi

• dredmorbius 5y ago
  The principle of a decaying memory register requiring a refresh on a regular basis is actually not too far distant from how MOSFET DRAM memory works, to the extent I understand it (poorly). Or, on a broader basis, education within a human population (we spend 15 years sinking information into the infosponges of children and hope that enough of that keeps over a lifetime to sink it into the next generation of infosponges). Or of manuscript documents, rewritten by hand by scribes. Or palimpsests. All data storage is ultimately a palimpsest, I'm increasingly convinced. See also, BTW, delay-line memory: https://en.wikipedia.org/wiki/Delay-line_memory https://en.wikipedia.org/wiki/Delay-line_memory
• formerly_proven 5y ago
  I've been told (many years ago) that CRTs for safety-critical applications like railway control used pretty much the same technique to read the image back and comparing it end-to-end to what the display is supposed to be. Never found a peep about that online though, and it seems to me like it'd be easier to just monitor deflection and beam current instead.