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OWMAC(4) Device Drivers Manual (sgi) OWMAC(4)

owmac
1-Wire Ethernet address

owmac* at onewire?

The owmac driver provides support for the Dallas DS1981, DS1982 and DS2502 add-only memory devices, found on SGI IOC3 devices.
These devices are used to store the Ethernet address of the ioc Ethernet interface, when such an interface is present.

intro(4), ioc(4), onewire(4)

The owmac driver first appeared in OpenBSD 4.4.
May 18, 2009 OpenBSD-current