This is not the case of AmigaOS, however. Commodore supplied very thurough documentation on every major release of the AmigaOS, detailing the API's in every detail. I own two copies of these documents, purchased on eBay. This means less guesswork about the API's and more getting down to getting things done.
AROS and MorphOS both utilized these public documents published with Commodore's blessing. Commodore didn't care, they were protected by patents.
The one thing people seem to forget is that people at Phase5 had access to the Amiga source code and they are working now on the MorphOS source code. This fact puts more the burden on the MorphOS developers to proof they did take precautions that no Amiga source code was used for the competitive product they are developing.
