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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: Privilege Levels Below User
Date: Wed, 12 Jun 2024 02:50:24 -0000 (UTC)
Organization: A noiseless patient Spider
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On Tue, 11 Jun 2024 14:04:59 GMT, Scott Lurndal wrote:

> Lawrence D'Oliveiro <ldo@nz.invalid> writes:
>
>>On Mon, 10 Jun 2024 15:23:51 GMT, Anton Ertl wrote:
>>
>>> Given that ARM is able to charge an architecture licensing fee for the
>>> instruction set alone ...
>>
>>I think that applies to newer versions, not the older ones. Given that
>>ARM goes back to the 1980s, any patents from the earliest years would
>>have expired by now.
> 
> It has nothing to do with patents.
> 
> The architecture license provides far more than the ability to implement
> the arm instruction set.   BTDT.

IANAL, but there are four kinds of “intellectual property”: copyrights, 
patents, trademarks and trade secrets.

If you were incorporating logic components developed by ARM, then 
licensing those might be covered by copyrights and trade secrets.

But if you’re a company like Apple, which designs and builds its own 
chips, then they need neither of those things.