Hi, On 8/8/07, Brad Boyer <[EMAIL PROTECTED]> wrote:
> > - the /install folder is -hfs-blessed, but don't know what that means, > > - there is another chrp descriptor called ofboot.b, but I don't know what > > it is, > > - the yaboot boot loader is present, but I couldn't find what enables it, > of the path is a special Mac shortcut that says to look for a > particular file type (tbxi is a code for a bootloader). Older Mac ROM > code was hard-coded to only look in the blessed folder for the System > file. > > Because of this, booting from a blessed folder on a CD could use a > boot path as simple as "cd:,\\:tbxi". Ah, I see, so the mapfile does the magic here: .b Raw 'UNIX' 'tbxi' "bootstrap" So, this is neither prep nor chrp, yes? > The ofboot.b file is a way to give boot options and configuration > to Open Firmware. I haven't used it on a CHRP system, but on a Mac >From what I've read in the CHRP paper, it looks for a file called bootinfo.txt; it said nothing about other files... > it allows you to set an icon for a drive and load a secondary > bootloader. The ofboot.b file is generally given the HFS file > type of tbxi to fit in with the default settings Apple sets. Here > are the relevant files on a real install: > The yaboot bootloader can be set directly in the firmware or it > can be referenced from the ofboot.b file. My system has the following > command set as one of the possibilities in ofboot.b: > > : bootyaboot " Loading second stage bootstrap..." .printf 100 ms load-base > release-load-area " /[EMAIL PROTECTED],f2000000/[EMAIL PROTECTED]/[EMAIL > PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED]:2,\\yaboot" $boot ; I see. But in the debian-cd's map, yaboot gets a filetype of boot (just like in your setup). But you said that the firmware was looking for tbxi... > This is telling the firmware to create a command bootyaboot that will > load and run the file yaboot in the blessed folder on the 2nd partition > on the SATA disk. The ofboot.b file also has a menu to choose a boot > method which can run this command based on the user input. Yes, and it has the same format as bootinfo.txt, it confuses me completely :) > With an Open Firmware that can directly load an ELF file, the yaboot > file could be specified as the boot-file setting. This would mean > that the firmware would always load yaboot as the normal boot process. i see... So, the boot process you described would be: firmware, if used with boot "cd:,\\:tbxi", locates a blessed folder with a tbxi file on it: the ofboot.b, which calls yaboot. Right? Do you know anything about the remaining bits I've found? Thanks a lot! -- Martín Ferrari
