OpenFirmware

This page is specifically for saving OF commands and info that I regularly forget and had to track down elsewhere. No more!

General

Switch to boot picker from OF:

multi-boot

Switch to OF from boot picker: (hold option after chime)

control z

Eject CD at boot picker: hold E at cursor (not watch)

Disable boot picker network scan:

setenv skip-netboot? true

Launch firewire target disk mode

target-mode

Set Date and Time:

time&date hh:mm:ss mm/dd/yyyy

or

decimal dev rtc sec min hour day month year set-time
decimal dev rtc 10 15 23 31 12 2005 set-time

OS X Specific

https://superuser.com/questions/255176/is-there-a-list-of-available-boot-args-for-darwin-os-x

Verbose boot

setenv boot-args -v

Disable altivec:

setenv boot-args novmx=1

Booting from USB

On some machines (which?) USB devices simply show up in the boot picker. If not…

OF v4.9 / 5.2 and newer

boot ud:,\\:tbxi

Older OF

Determine USB device path with dev / ls and devalias

Look for something like this:

/pci@f2000000/usb@1b,1/hub@1/disk@1

Then boot with:

boot usb0/disk:2,\\:tbxi
openfirmware.txt · Last modified: 2021/10/09 04:11 by john
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