Re: decapped CBM MOS

From: smf <smf_at_null.net>
Date: Mon, 30 May 2016 14:58:47 +0100
Message-ID: <beb98e9f-80f1-e7e6-8824-4254f6f00c8b@null.net>
On 30/05/2016 10:59, Marko Mäkelä wrote:
>
> Which law do you think would apply (other than the laws of physics)? 
> If it was legal for Nintendo to use the Ricoh 2A03 that was basically 
> a mask-level copy of the 6502, with some transistor(s) disabled to 
> prevent the patented BCD mode from operating, then I (not being a 
> lawyer) do not see any legal problem with the fine work that 
> visual6502.org are doing.  U.S. Patent 3,991,307 on the 6502 BCD mode 
> should have expired by now too.

Things changed around 1989

https://en.wikipedia.org/wiki/Integrated_circuit_layout_design_protection

Dumping the contents of an internal mask rom by decapping is also a 
copyright violation.

However in both of these cases it would be a civil rather than criminal 
matter, so I wouldn't expect the police to turn up.

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Received on 2016-05-30 14:01:50

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