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GEM(4)                   BSD Kernel Interfaces Manual                   GEM(4)

     gem -- ERI/GEM/GMAC Ethernet device driver

     device miibus
     device gem

     The gem driver provides support for the GMac Ethernet hardware found
     mostly in the last Apple PowerBooks G3s and most G4-based Apple hardware,
     as well as many Sun UltraSPARCs.

     Cards supported by gem driver include:

     o   Sun GEM gigabit Ethernet
     o   Sun ERI 10/100 Mbps Ethernet
     o   Apple GMAC

     On sparc64 the gem driver respects the local-mac-address? system configu-
     ration variable which can be set in the Open Firmware boot monitor using
     the setenv command or by eeprom(8).  If set to ``false'' (the default),
     the gem driver will use the system's default MAC address for all of its
     devices.  If set to ``true'', the unique MAC address of each interface is
     used if present rather than the system's default MAC address.

     Supported interfaces having their own MAC address include the on-board
     Sun ERI 10/100 Mbps and GEM gigabit Ethernet Interfaces on boards
     equipped with more than one Ethernet interface and the Sun GEM gigabit
     Ethernet add-on cards.

     hme(4), miibus(4), netintro(4), eeprom(8), ifconfig(8)

     The gem device driver appeared in NetBSD 1.6.  The first FreeBSD version
     to include it was FreeBSD 5.0.

     The gem driver was written by Eduardo Horvath <eehATNetBSD.org>.  The man
     page was written by Thomas Klausner <wizATNetBSD.org>.

BSD                             August 15, 2004                            BSD