I am looking for any technical information for the ROM file for new world Macs. This is the Mac OS ROM file that resides inside of the System folder on any "New World" PPC's. I know the actual ROM or BIOS is an OpenFirmware implementation, and I can find tons of information about that. Any information would be greatly appreciated.
About all I know is that it is a CHRP script that contains a routine that determines information for Mac OS and passes it to the system as it starts. It also contains a copy of the Macintosh Toolbox that it loads into RAM.