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RISCOS Ltd / RISC OS Open Ltd Joint Press Release     date 23rd Nov 2007
Right back to the days of Acorn, there have been two distinct strands of RISC
OS development. These two strands were developed to exploit different markets
and hardware platforms. The Castle Technology strand is used in a number of
products, including the IYONIX PC and various set top boxes. The RISCOS Ltd
strand is also used in a number of different products, including the A9Home,
the VirtualAcorn range of software emulators and as upgrades to existing
Acorn computers via the RISC OS Select scheme.
Sources to both strands are available free of charge to developers. One
strand is gradually being published under the Castle Technology Shared Source
initiative by RISC OS Open Ltd. The RISCOS Ltd strand is available to
Registered Developers and Hardware Manufacturers under NDA or as part of the
Authorised Manufacturer Scheme, for both commercial and non-commercial
Today, RISC OS Open (ROOL) and RISCOS Ltd (ROL) are pleased to announce an
agreement to enable co-operation in the development of these two strands of
It is envisaged that this will be a two-step process:
Step One: to jointly co-ordinate future developments in order to avoid work
being carried out on one strand of RISC OS which is incompatible with work on
the other. For example, ensuring that when new features are added, they are
implemented in a way which can interact as smoothly as possible with those
features where they already exist on the other strand. This will broadly be
achieved through the publishing and maintenance of public API documentation
and guiding developers to that documentation.
Step Two: to investigate ways to improve the current situation for developers
of software. It is hoped that RISC OS Open and RISCOS Ltd can implement
solutions to problems which developers are currently faced with, for example
the existing situation with software version numbers being divergent on the
two different RISC OS strands.
RISC OS Open and RISCOS Ltd are committed to ensuring that RISC OS users and
developers will see real benefits from this co-operation over the coming
months and into the years ahead.
For further details contact:-  and/or

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 Last edit: 10th Apr 2016 at 4:56pm (3028 days ago)

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