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> Up until then the pi were more like a microcontroller with a UI layer atop. This is not my area of expertise but from my understanding and reading, I would d
by lproven 3y ago
> Up until then the pi were more like a microcontroller with a UI layer atop.
This is not my area of expertise but from my understanding and reading, I would dispute that, strongly.
The Pi 1, 2 & 3 all run the ThreadX RTOS on the GPU as their "firmware" and the Arm core(s) are started by ThreadX:
https://en.wikipedia.org/wiki/ThreadX https://en.wikipedia.org/wiki/ThreadX
Now ThreadX is owned by Microsoft but it wasn't when the Pi was designed and built.
I love your turtles allusion but the Pi never was a simple or clean (or FOSS) design.
The Pi Pico is, relatively speaking, but it's not really a Pi.
- rusk 3y agoI perhaps overpaid the simplicity of the early pi’s but the point I was was making that you missed was more of comparison between the pi4 and the earlier models. Thanks.
- lproven 3y agoIs the Pi 4 so different in this regard? It has more flexibility in what it boots from and so on, but ThreadX and so on are still involved. I was told that the Pi 5 is significantly different, but not the 4. Are you perhaps mixing them up?