RISC OS Open

RISC OS  OPEN


A fast and easily customised operating system for devices using ARM processor cores.

Source code

Source code

The old source code pages were quite confusing, so this section of the site was restructured. Everything that used to be here and more besides can now be found in the downloads section.

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Commercial use

For commercial enquiries, please contact the owners of RISC OS, Castle Technology Ltd.

ROOL Store

The official C/C++ Development kit and more here.

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