Software information: RaspberryPi: Beta RPi ROM

The beta RPi ROM – available from the downloads page – provides the latest beta ROM image (a file ‘riscos/img’) for the Raspberry Pi.

This software is suitable for all models of Raspberry Pi, including the Pi 4B and the Pi 400.

Please note that the beta ROM is untested, work-in-progress software. Some components may be unfinished and/or contain serious bugs: that is what development is about! You should only use the beta ROM if you are willing to accept the risks involved and have a suitable backup strategy in place.

If you are new to RISC OS you may prefer to download one of the “stable release” images instead (e.g. the RISC OS Pi SD image, which contains all the necessary elements ready to be copied to a blank SD card).

Installing the beta ROM

The ROM image can be used as a direct replacement for your existing RISC OS ROM image.

You should also download the “Nightly Beta HardDisc4” image from the Miscellaneous downloads page, as that contains the latest development version of !Boot.

If you are upgrading from an older release of RISC OS, you will also have to replace the firmware files. Instructions on how to obtain updated firmware can be found at Software information: Raspberry Pi: Firmware.

Full step-by-step instructions for upgrading from an older release of RISC OS can be found here.

Further information

For more on bootloader files (including config.txt and cmdline.txt) see Software information: Raspberry Pi: Firmware.

You may also wish to read Using RISC OS on the Raspberry Pi.

An explanation of how the Raspberry Pi port works is also available.