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### Q: does the card have a MAC address stored in a memory? authored by Erik van der Bij's avatar Erik van der Bij
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faq.md
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in the [SPEC svn
repository.](https://www.ohwr.org/project/spec/repository/trunk/hdl/golden)
### Q: does the card have a MAC address stored in a memory?
A: No. There is no memory where the MAC address is stored. So SPEC boards do not come with a MAC address that is set or programmed by the manufacturer.<br/>
When you use the White Rabbit PTP core, it uses the ID of digital 1-wire thermometer available on the SPEC board to generate unique MAC address for each board. There is a specific [WRPTP FAQ entry about MAC addresses(https://www.ohwr.org/project/wr-cores/wikis/Wrpc-faq#mac-addresses).
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## Software
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Matthieu Cattin, Erik van der Bij, Grzegorz Daniluk, Federico Vaga - 26 February 2020
Matthieu Cattin, Erik van der Bij, Grzegorz Daniluk, Federico Vaga - 5 April 2020