Welcome

Who are RISC OS Open Limited?

RISC OS Open Limited (ROOL) manages the source code to RISC OS. We are an organisation run on a largely voluntary basis. We also offer specialist professional services to anyone who is interested in developing products around the Arm architecture or RISC OS. You can find out more information about us here.

What is RISC OS?

RISC OS is a computer operating system designed in Cambridge, England by Acorn. First released in 1987, its origins can be traced back to the original team that developed the Arm microprocessor. RISC OS is owned by RISC OS Developments Ltd. You can find out more at sites such as riscos.info, The Icon Bar and RISCOSitory.

If you are new to RISC OS, you might want to look at the introductory pages in our wiki here.

Latest news

• Charting our way (24-May-2020)
• COVID-19 update (16-Mar-2020)
• Three interesting topics for our march towards April (09-Mar-2020)
• New Desktop Development Environment reaches out (21-Feb-2020)

Recent changes in GitLab

• Pushed to branch master in Paint (Jeffrey Lee) – Adjust USBDriver scrollwheel fix (04-Jul-2020)
• Pushed to branch master in XHCIDriver (Robert Sprowson) – Fix for occasional NULL pointer read on timeout (04-Jul-2020)
• Pushed to branch master in USBDriver (Robert Sprowson) – Change to unsigned physical addresses (04-Jul-2020)
• Pushed to branch master in MUSBDriver (Robert Sprowson) – Change to unsigned physical addresses (04-Jul-2020)