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This page explains how to upgrade the RISC OS ROM image on some of the more popular hardware targets. It is assumed that you have already upgraded the HardDisc4 contents.
The actions listed here should be performed from the host OS (Windows/macOS/Linux).
The actions listed here are all carried out on the on the DOS (i.e. FAT16) boot partition of the SD card. You can perform the upgrade from RISC OS, or if you prefer you can use another machine (Windows/macOS/Linux) to perform the upgrade.
1 You may prefer to move the old ROM (riscos.img) and the old firmware files (bootcode.bin, fixup.dat, fixup4.dat, start.elf, start4.elf) to an “OldFiles” directory instead of overwriting them. This would allow for an easy regression to the old ROM (and firmware) if necessary.
2 You may prefer to move the old “riscos.img” to an “OldFiles” directory instead of overwriting it. This would allow for an easy regression to the old ROM if necessary.
Follow the instructions in the ROM download for your chosen hardware.
If you are just trying-out the new ROM, you are strongly advised to use the “Softload” version of the ROM image, where available. The “Flash prog” version (Iyonix, Kinetic Risc PC, Titanium) should only be used if you know that you won’t be regressing to the older ROM.