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 this driver include:
•
Sun GEM gigabit ethernet (SX fibre variants)
The GEM family supports hardware checksumming to assist in computing IPv4 TCP checksums. The
gem driver supports this feature of the chip. See
ifconfig(8) for information on how to enable this feature.