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The author could focus on an existing embedded RTOS and fork from there. Enough cherries to pick one.

But is he going to find one that follows his "all has to be immutable" approach? I somewhat doubt it. Do you know of any existing OS that works like what the author describes?

The reason I posted the idea was to start with a system that is working and where you can forego the filesystem and other parts that are typically found on a full blown OS. It's not uncommon for an RTOS to dismiss the GC and leave it to the programmer.

For example, there are discussions in the RTOS world to take a closer look at Rust (Google embedded Rust) which is why the terms "new OS", "GC" and "experimental" triggered my response to look over there for a starting point.

That is a very good idea. So far I've only been able to figure out EFI booting basics.. Which is the least interesting part. Do you have any concrete suggestions?

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