RISC OS Open

RISC OS  OPEN


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

Latest news


New IYONIX ROM release (version 5.16)

Posted by Steve Revill Sat, 23 Jan 2010 20:34:00 GMT

RISC OS Open (ROOL) are pleased to announce the immediate release of the very latest RISC OS ROM release from Castle Technology (Castle) for the IYONIX pc desktop computer.

This is an official release from Castle and represents the second formal ROM release to include changes and improvements which have been fed back into the shared source project.

You can download your copy of RISC OS 5.16, either as a softload (to try it out) or as a ROM programmer tool, from this page.

Please note that in order to fix the incorrect date bug seem on some machines in 2010 with RISC OS 5.15 or earlier, you must program the ROM into Flash.

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IYONIX pc 2012 date problem

Posted by Steve Revill Tue, 05 Jan 2010 01:22:00 GMT

Many of you will be aware of a bug in the handling of a year counter in the IYONIX pc which means that the date on some machines changes to 2012 when they are booted. This is a software problem and a number of work-arounds already exist.

However, Castle Technology feel that this is a sufficiently severe fault to justify starting work on the next official release of RISC OS 5 for the IYONIX pc – RISC OS 5.15.

The latest version will not only address the date problem mentioned above, but will include many of the changes and improvements implemented since RISC OS 5.14 was released back in April 2009. Once it is available, users should program the new release into their machines using a supplied flash programmer to ensure that the date bugfix is correctly installed.

Keep an eye on the RISC OS Open web site over the next week or two for further news on the testing and release process.

Note to developers: the development version of RISC OS will move to 5.16 (beta) as soon as the new official version is released.

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C/C++ Tools Upgrade for half price!

Posted by Steve Revill Fri, 02 Oct 2009 13:58:00 GMT

RISC OS Open will open a new special offer at the London Show on Saturday. All existing owners of the C/C++ Tools CD with a C compiler newer than version 4.99 qualify for a half price upgrade to the latest version of the tools.

If you own the C/C++ Tools CD with a compiler version 5.00 or newer, you can update to the current newest toolset (version 5.68) for half price! Once your purchase has been confirmed, this tools update will be posted direct to you.

Come and see us at our stand at the London Show to place your order tomorrow!

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Official Tools CD available for online purchase

Posted by Steve Revill Thu, 30 Apr 2009 20:25:00 GMT

Some time ago, RISC OS Open took over the official set of C/C++ Development Tools for RISC OS. We are pleased to announce that these can now be purchased for £50 (plus £1 p&p, plus VAT) from our sale page here.

There are already some minor updates and fixes to our latest build of the Tools, including:

  • fix to divide by zero error in modsqz
  • fix to buffer overrun in the link tool
  • minor changes to the C compiler, cc
  • the decaof tool now supports a significant number of ARM v6 an v7 instructions

We hope to continue to add to and improve the Tools for as long as they are the only sensible way to build the published RISC OS sources.

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

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