I understood that the limitation of the ROL licence was to keep them out of the set-top box market. I doubt very much if castle would want to complain about ROL's licencing of embedded products:
8th February 2002
Embedded RISC OS announced.
RISCOS Ltd today announces the development of Embedded RISC OS.
Work is now progressing on developing a new version of RISC OS which will primarily aimed at the embedded products market.
Target devices will include ARM 7500, SA110 and eventually the SA1100/SA1110.
The first product to use Embedded RISC OS is being developed by Castle Technology using their Neuron system."