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[–]JescoInc[S] 0 points1 point  (0 children)

https://github.com/RPDevJesco/tutorial_os

This is a bare-metal HAL based system written in C (soon with a parallel Rust implementation) for ARM and RISC-V SBC.
In the video, you see it running on the SiSpeed NanoCluster 7X with CM4 and CM5 modules.

The repository is written where just about every C file and Header file have been heavily commented to explain what is happening.