====== Open Firmware ======
==== Commands ====
^ ^ Command ^ Description ^
^ Navigation ^ ^ ^
| | list all devices (entire tree) | ''dev / ls'' |
| | list all aliases | ''devalias'' |
| | list directory contents | ''dir hd:\'' |
| | | ''dir /ht/pci@2/usb@b,1/disk@1:,\'' |
| | | ''dir /ht/pci@3/firewire@e/node@/sbp-2@4020/disk@0:,\'' |
| | eject optical disc | ''eject cd'' |
^ Booting ^ ^ ^
| | boot with default settings | ''mac boot'' |
| | boot from optical disc | ''boot cd'' |
| | boot from USB device | ''boot ud'' |
| | boot from specific path | ''boot /ht/pci@2/usb@b,1/disk@1:,\install\yaboot'' |
^ NVRAM settings ^ ^ ^
| | print settings | ''printenv'' |
| | change settings | ''setenv boot-device mac-io/ata-4@1f000/@0:2,\System\Library\CoreServices\BootX'' |

[[http://www.macfreek.nl/memory/Open_Firmware|More info]]