Note the disclaimer: "This course has not yet been updated to work with the Raspberry Pi models B+ and A+. Some elements may not work, in particular the first few lessons about the LED. It has also not been updated for Raspberry Pi v2."
Reminds me of the experimental version of Stanford's CS 140/212, CS 140e, which used Rust to develop a simple operating system kernel for the Raspberry Pi 3B:
Note the disclaimer: "This course has not yet been updated to work with the Raspberry Pi models B+ and A+. Some elements may not work, in particular the first few lessons about the LED. It has also not been updated for Raspberry Pi v2."
And presumably not updated for the Pi 3,4,5 too!