Software information: RaspberryPi: Beta RPi ROM (Rev #16, changes)
Showing changes from revision #15 to #16:
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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. Some hardware features are non-functional on the Raspberry Pi 4 – see Raspberry Pi 4 port status? for details.
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 on a Pi 1, Pi 2 or Pi 3
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.
Please If note you that are upgrading from an older release ofRISC OS OS, 5.27 you cannot will use also have to replace the Raspberry Pi firmware files files. (bootcode.bin, Instructions fixup.dat on and how start.elf) to supplied obtain with updated earlier firmware releases can of be found atRISC OS. Instructions on how to obtain updated firmware can be found at Software information: Raspberry Pi: Firmware.
Full step-by-step instructions for performing upgrading the from upgrade an can older be release found of here RISC? OS can be found here.
Using the beta ROM on a Pi 4
If you are already using RISC OS 5.27 on an earlier model of Raspberry Pi, that build will require the following modifications to support the Pi 4:
- This ROM image as a direct replacement for the existing RISC OS ROM image
- Additional firmware, as mentioned on Software information: Raspberry Pi: Firmware
- A 3-line modification to config.txt – see config.txt (Raspberry Pi) for details
See Raspberry Pi 4 port status? for more information (including hardware restrictions).
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.
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