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Re: El Torito Dual Boot.

From: Andrei Warkentin
Subject: Re: El Torito Dual Boot.
Date: Wed, 22 Mar 2006 15:12:34 -0600

Take anything I say with a grain of salt, but...

AFA I understand, if the disk is an HFS or hybrid HFS/ISO, OpenFirmware scans it for a "blessed" folder, and looks for a file with a resource type "tbxi", which it then runs. This is usually (always?) a bootinfo script that specifies further actions. I do not know if it is possible to boot off straight ISO9660 disks from OpenFirmware - maybe it just looks for a file called bootinfo or bootscript? Mkisofs can be used to master hybrid HFS/ISO disks that can boot on Pmacs. On OS X, one would use the native "hdimage" and "bless" utilities.

Andrei Evgenievich Warkentin
Cell: (+1) (847) 321-15-55

On 22.03.2006, at 14:50, Jun OKAJIMA wrote:

And, it is interesting if the CD can boot on Intel Mac also.
I mean, if you put the CD to Intel Mac, it boots x86 *Mac* (=EFI) loader up, and then runs x86 *Mac* binary, which I think it must be same as x86 IBM-PC


With my understanding of El Torito ( CD boot ) specification,
I guess that "dual boot" CD for both Mac(PowerPC) and IBM-PC seems to be possible.
I mean, a CD which acts like this ---.
- When you put a CD to Mac, boots PowerPC boot loader up, and then runs on PowerPC.
   - When you put a CD to IBM-PC, boots x86 boot loader up, and....

I am not sure that here is right place to ask this question,
but anyway, do somebody know
     --- info about this kind of dual boot CD
     --- or place (ML or BBS or.. ) to ask this question.

TIA,   Okajima, Jun. Tokyo, Japan.

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