Unfortunately, an OBP upgrade from 4.13.2 to 4.17.1 hasn't solved the CDROM booting issue for me. More errors are now reported:
Loading initial ramdisk.... ERROR: Last Trap: Illegal Instruction
Error -256 ERROR: Last Trap: Memory Address Not Aligned
Error -256 Stack Underflow ok
Unfortunately, an OBP upgrade from 4.13.2 to 4.17.1 hasn't solved the CDROM booting issue for me. More errors are now reported:
Loading initial ramdisk....
ERROR: Last Trap: Illegal Instruction
Error -256
ERROR: Last Trap: Memory Address Not Aligned
Error -256
Stack Underflow
ok