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 professional services to anyone who is interested in developing commercial products using the ARM architecture and 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 Castle Technology Ltd. You can find out more at sites such as RISC OS Blog, 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: Headlines

• RISC OS Open at Wakefield 2018 (16-Apr-2018)
• Padlock clicks shut on network stack project (14-Mar-2018)
• RISC OS 5.24 approaches (28-Jan-2018)
• Desktop development and not a flat pack in sight (23-Jan-2018)

Recent changes in CVS

• ROOL CVS: Convert ADR to ADRL to complete build (25-Apr-2018)
• ROOL CVS: Disable error block validity checks (24-Apr-2018)
• ROOL CVS: Typo in readme (22-Apr-2018)
• ROOL CVS: Increase number of vectors supported by the kernel to 96. (19-Apr-2018)