On 13/10/12 06:37, Segher Boessenkool wrote:
On a Mac-partitioned disk, there is no such thing as a
partition" (that is a DOS thing).
Apple OF looks at the partition types (which are strings), and
uses the first one that is "Apple_Boot", "Apple_HFS", or
if you do not give a partition number (or partition # 0).
Oh that's interesting. Perhaps the reason I'm getting distracted is by
looking at the partition flags #defines in the code:
kPartitionAUXIsValid = 0x00000001,
kPartitionAUXIsAllocated = 0x00000002,
kPartitionAUXIsInUse = 0x00000004,
kPartitionAUXIsBootValid = 0x00000008,
kPartitionAUXIsReadable = 0x00000010,
kPartitionAUXIsWriteable = 0x00000020,
kPartitionAUXIsBootCodePositionIndependent = 0x00000040,
kPartitionISMountedAtStartup = 0x40000000,
kPartitionIsStartup = 0x80000000,
kPartitionIsChainCompatible = 0x00000100,
kPartitionIsRealDeviceDriver = 0x00000200,
kPartitionCanChainToNext = 0x00000400,
This would in itself suggest that kPartitionAUXIsBootValid or
kPartitionIsStartup would be good indicators of which partition to
choose. Unfortunately I don't have any PPC OS X images or much Apple
experience, so guesswork is all I have at the moment.
Do you have a source for your algorithm above?
FWIW, it normally boots "hd:,\\:tbxi" which
means the disk with
alias "hd", potentially some partition on that, in the blessed
folder ("\\"), the file with any creator and file type "tbxi"
(which is a bootinfo file) (":tbxi").
Yes, I believe this is currently what happens when attempting a boot.
I don't think you want to recreate all the logic
(and lack of it!)
behind how Macs boot.