About ZPU licensing: The license for HDL implementations is FreeBSD to be friendly towards commercial projects and other open source projects, however the architecture, documentation and tools will be GPL. This means that all updates to the architecture must be shared, but actual implementations(which are small and can be very project speific) can be friendly towards commercial considerations. Patches to update files w/correct licensing info will be most appreciated! The ZPU and all the files are per 1/1-2008 Copyright Zylin AS, i.e. Zylin is free to decide upon the BSD license for HDL implementation and GPL for architecture, tools and documentation.