Default arguments break in sam460ex configuration

I've found a guide to install AmigaOS through this qemu command line:

` ./qemu-system-ppc -machine sam460ex -rtc base=localtime \
-drive if=none,id=cd,file=Sam460InstallCD-53.58.iso,format=raw \
-device ide-cd,drive=cd,bus=ide.1`

* UTM Version: 3.1.4 (52)
* OS Version: MacOS 12.3.1
* Intel or Apple Silicon? Silicon

I tried to create a VM, with PowerPC machine and sam460ex processor, but sadly it never starts. What it the configuration I need to create in UTM to replicate this command line?
Thanks

_Originally posted by @ecstaticax in https://github.com/utmapp/UTM/discussions/3932_