# \#magnetic-drum

**URL:** https://scanalyst.fourmilab.ch/tag/magnetic-drum/4681.md

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## [Inside the Bendix G-15's Magnetic Drum Memory](https://scanalyst.fourmilab.ch/t/inside-the-bendix-g-15s-magnetic-drum-memory/3793)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 0\
**Last updated:** [26 September 2023 13:24 UTC](https://scanalyst.fourmilab.ch/t/inside-the-bendix-g-15s-magnetic-drum-memory/3793 "2023-09-26T13:24:01Z")

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The Bendix G-15 vacuum tube computer used a rotating magnetic drum for its main memory. Except for a few registers internal to the processor, all system memory was kept on the drum, as described in the 202…

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## [Magnetic Drum Memory from a 1950s Bendix G-15 Vacuum Tube Computer](https://scanalyst.fourmilab.ch/t/magnetic-drum-memory-from-a-1950s-bendix-g-15-vacuum-tube-computer/3637)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 0\
**Last updated:** [21 August 2023 12:33 UTC](https://scanalyst.fourmilab.ch/t/magnetic-drum-memory-from-a-1950s-bendix-g-15-vacuum-tube-computer/3637 "2023-08-21T12:33:16Z")

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Even in the era of vacuum tube computers, where every flip-flop required two vacuum tube components (sometimes in the same envelope), memory was tough. Providing sufficient high-speed (by the standards of …