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Hi all,

I'm trying to make my OS for the following targets: x86-32, x86-64, ppc-32 & ppc-64. I've already build the cross compilers and i'm stuck at the PowerPC side. Does anyone know how to boot a PPC? Is there code available or documents?

x86-32 & x86-64 are booting already and i like to add the PPC builds. This enables me to seperate architecture, kernel and application from each other. (more or less ;D)

Tanks in advance,

Greets,

Rene

Unfortunately, there is no such thing as "a PPC PC". There's Apple and - somewhat older - its compatibles, and there is... erm... oh yes, the Amiga One and the Pegasos... IBM once intended to build a "reference platform" (POP), but that failed to materialize...

Apple is notorious for not documenting their machines. There is UBOOT and OpenFirmware, but I know little more than those monikers. I also saw references to "Old World" and "New World", but that might be totally different things.

Sorry to be so fuzzy, but as I said, it's not as if there's one well-documented standard for PPC booting...

I once installed Gentoo on a eMac PPC. Difference is between New World machines ( that uses yaboot to start ) and Old World ( that uses BootX ).

http://penguinppc.org/bootloaders/yaboot/
http://penguinppc.org/~benh/

Anything later than the Mac G3 Blue&White MUST use Yaboot to start.
You can have a look at these bootloaders to extract some useful info.

Axel

So you have...

• OpenFirmware
• UBOOT
• yaboot
• BootX

...depending on the system used. And there the PPC enthusiasts wonder why their pet platforms aren't as widely supported.

Thanks for the information. Something tells me that i only have to focus on the 'New World' machines so yaboot it is.

Anyone knows if PearPC supports 64-bit PPC? Couldn't be clearly found on their website and i don't know all to PPC processors yet.

Greets,

Rene