Question on LinuxBIOS Bios Stack

[Heiko Joerg Schick]

Hello,

I can remember that (I think) 6 month ago, a system call
LOBOS was used to boot the later used Linux Kernel. Now I
saw in the document "Flexibility in ROM: A Stackable
Open Source BIOS" that a quite more complex firmware stack
is used, with the following components:
- LinuxBIOS
- ADLO
- Grub Bootloader
- Windows 2000, Linux, ...

I this always the case and how it is realized on other
platforms, like PowerPC???

Thanks in advance !!!

Regards,
    Heiko