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I'm surprised at this. I thought designing a CPU core, based on existing ARM technology, wasn't that complex. Due all respect, of course.

Or perhaps it's my misunderstanding, as it's not like ARM gives you some schematics, and then you tweak and build around them. Perhaps what ARM gives you is the instruction set and nothing else, and that's not at all like having the plans for a building.

Also, ARM might ask you for several million already in order to get a license for their ISA.

So, what does it take to make a CPU? Being it ARM makes it any easier? x86 maybe is? As I understand it would be a very lengthy explanation, pehaps there's something worth reading there that you could point me at.

By the way, congratulations Andreas: I've never seen a member here with such a "Yokemate of Keyboards" award! Are you the most posting user here? It wouldn't surprise me - and I'd say 90% of your posts are useful, that would count double than this post from mine.