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    That’s impressive…but what device in 2021 needs to boot from a floppy? Today’s embedded devices are typically smaller than a floppy drive, and find something like microSD to be more appropriate, which also means having an absurd amount of storage available.

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      I’m gonna guess “something old”

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        Because it’s fun.

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          just pandering to a specific crowd being nostalgic with older things.

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          This is how my first Linux router in the late 1990s worked-ish. There was a Linux distribution called fli4l.

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            Yeah, but can it run Doom?

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              Doom needed four floppies. Doom 2 took 5.

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                Perhaps it could be loaded into memory from a DAT cassette.

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                  Most of the Doom data is game assets and levels though, I think? You might be able to squeeze the game engine and a small custom level in 400k.

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                    Yes it is. But the engine itself is about 700k. The smallest engine (earliest releases) were a little over 500k. You could probably build a smaller one with modern techniques and a focus on size though.

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                      Good news, ADoom for Amiga is only 428k! Bad news, Amigas only have double density FDDs so you only have 452k for the rest of the distro.

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                muLinux used to be something like this, but some ~25 years ago.