# Planux

> Notes on embedded systems, open source and the Zephyr RTOS.

## Blog
- [From Three Architectures to a Truly Cross-Architecture RTOS](https://planux.com/blog/architecture-evolution): The evolution of architecture support in Zephyr, from three ports to a kernel designed to be portable from the start.
- [Zephyr on the Nokia N900](https://planux.com/blog/zephyr-on-the-n900): A 2009 phone, a signed bootloader that cannot be replaced, no serial cable and a webcam pointed at the screen: how Zephyr went from a question to a working phone with a touchscreen, camera, sound and its own drivers.