I have a PowerBook6,8 with 7447a v1.5( PRV 80030105 ), and I've been trying to get OS 9 to boot on it.
I'm assuming this is one of the last G4's that can't boot OS 9 at this time?
I was able to get the the OS 9 boot screen, but the system bombs out while it's loading. I removed everything from the Systems Folder but the Mac OS ROM, Finder, and System suitcase.
Just to make things a little easier, I used diskutil in Tiger to create a USB drive with OS 9 drivers.
diskutil partitionDisk /dev/disk1 1 OS9Drivers HFS+ MacHD 0b
Then I copied a OS 9 System folder to the drive and blessed it with:
sudo bless -folder /path/to/your/os9/System Folder
I think that was the command, I'll have to check. We should be able to bless the drive with --setboot, but I haven't figured out the correct commands for that, yet.
Anyway, if I can help here, I will, and maybe we'll kill to non-9 booting Macs with one stone, as it were.
Sorry, forgot the boot command to boot a USB drive from Open Firmware.
Check the dev tree and see what port your usb drive is on, then dev alias to see the alias of the port.
For me, it usb0.
So:
boot usb0/disk:10,\\:tbxi