PATH
The Macintosh Name Registry contains the information in the updated Open Firmware device tree. This functionality is unchanged by the NewWorld architecture except to provide new mechanisms that provide communication with Open Firmware. The Open Firmware config variables used by Open Firmware during boot are modifiable from the Mac OS by using the existing Name Registry API calls. Properties saved in NVRAM (nonvolatile RAM) by the Mac OS are available to Open Firmware FCode drivers as well as Mac OS runtime drivers. See New Name Registry Functionality for more details.