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Ask HN: Interest for open source ARM v4T processor?
Hi,
I'm designing an open source ARM v4T soft processor (https://github.com/krevanth/ZAP) with cache and memory management support. Looking for feedback regarding the project. Would you be interested?
- NonEUCitizen 10y agoARM is litigious -- Thumb might still be protected by patents. Try RISC-V instead?
- krevanth 10y agoIf I remove Thumb support, is my design clean? Is the ARM v4 still protected by patents or is free to implement.
- kjs3 10y agoIt may be a clean design (IANAL, but don't think so) but wouldn't stop ARM from suing you to stop.
- NonEUCitizen 10y agoYou should assume not, because they would've patented everything they can. How old is ARM v4? Is it old enough that patents have expired? You would then need to check country by country (where they have filed patents), as each country has its own patent laws. Disclaimer: I am not a lawyer.
- kjs3 10y agoThe Hitachi SuperH is patent free and is being reimplemented as an open project (http://0pf.org/about-ocf.html http://0pf.org/about-ocf.html).