On 11/04/2023 11.34, D. Hugh Redelmeier via talk wrote:
As you say, Linux doesn't run on an ESP32. But there is a youtube
video of someone who has built a PDP-11 emulator with an ESP32 and
runs 2.11 BSD UNIX on it.
<https://www.youtube.com/watch?v=jtmNOZVrz98>
So cute!
Ah, Sprite_tm's project: Sprites mods - Tiny PDP11 - Intro —
https://spritesmods.com/?art=minipdp11
It's a little hard to find the exact EP32 module used for that
simulation. That's part of the problem: there are many different chips
called ESP32 /something/, but many of them are incompatible. Some have
one core, most have two. Some have the ability to take a few megabytes
of extra external (slow-ish) RAM, many don't. Some are even RISC V in
disguise (the new ESP32-C6 is fully RISC V) , or have a tiny RISC V
acting as an Ultra Low Power Processor that can do basic electronic
logic and while the main processor is asleep.
I wonder if uClinux could be ported to ESP32. But not enough to try!
It's not clear to me that it would be very useful.
Apparently it can —
https://www.cnx-software.com/2021/07/18/linux-5-0-esp32-processor/ - but
it's doing it via RISC V emulation. I can't see how it would be useful
at all, though
cheers,
Stewart
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