The system software includes new drivers for the FireWire ports, the Ethernet port, and the wireless LAN module.
The new FireWire Interface Module (FWIM) supports 1394 OHCI (open host controller interface). The FireWire driver also includes services for mass storage devices with the SBP-2 (Serial Bus Protocol) standard.
The new Ethernet driver supports 100Base-T operation and Wake on LAN. The Ethernet driver uses the Open Transport Data Link Provider Interface (DLPI).
The driver for the wireless LAN module is not part of the Mac OS ROM image but resides in the Extensions folder.