cmdline.txt (Raspberry Pi) – Parameters passed to the RISC OS ROM on boot.

config.txt (Raspberry Pi) – Settings needed for the Raspberry Pi bootloader.

Raspberry Pi Firmware – The other files you need to get RISC OS to load on the Raspberry Pi.

Dual-format SD card – Why the SD card needs to be in a special format.

Boot-up issues – What to do if your first boot of RISC OS doesn’t work.

Installing RISC OS – How to create your own SD card image.

Hardware compatibility list – peripherals seen to work with the Raspberry Pi.

Beta RPi ROM – The latest development build, for the more adventurous user.

RPi ROM stable – The RISC OS 5.28 ROM, for people who prefer to “roll their own”.

Installation instructions (including an indication of other software you will need to download) are given on the linked pages. The remaining builds are for the more experienced user. This downloads the software and writes it to the SD card in a single process.

If you prefer, you can use Raspberry Pi Imager (Windows/macOS/Linux) to install RISC OS.

Once this has been done, you can plug the card into your Raspberry Pi and switch on. This archive contains an SD card image which needs to be written to a microSD card using a utility such as Win32DiskImager or Etcher.

The most straightforward to use is RISC OS Pi.

RISC OS builds available for the Raspberry Pi

On the Pi Zero 2 W, the GPIO pins may be inaccessible at RISC OS 5.28.

The USB3 ports on the Pi 4 will only work at USB2 speeds.

One of the open bounties should address this issue.

The onboard WiFi chip (in the Pi Zero W, Pi Zero 2 W, Pi 3 and Pi 4) is not currently supported.

RISC OS can only run in a single core: the other cores in the four-core Raspberry models are currently unused.

Pi Zero (including the Pi Zero W and Pi Zero 2 W).

RISC OS can be used on nearly all Raspberry Pi models: If you are new to RISC OS you may wish to read the Introduction to RISC OS and the RISC OS Beginners FAQ. This section of the wiki contains information to assist users who wish to run RISC OS on the Raspberry Pi.

Raspberry pi zero w install os