Here is the lists of operating systems that I'm able and not able to run on QEMU PPC:

- DEBIAN 5.0.5 PPC it works
- OPENSUSE 11.1 PPC it works

- FreeBSD 8.1 PPC hangs (see below details)
- NETBSD 5.0.2 PPC and PPC64 does not load with defaults (see below details)
- SLES 11 SP1 PPC does not load with defaults (see below details)
- AIX 4.3.3, 5.1 and 6.1 do not load (see below details)


Some time ago I remember that the "working" OSs  was more that now :-(
--
Cordiali Saluti/Best Regards

Massimo Montecchi
Modena - Italy




DETAILS:

-------------------------------------------------------------------------------
FreeBSD 8.1 PPC

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...
Consoles: Open Firmware console  

FreeBSD/powerpc Open Firmware loader, Revision 0.1
(root@xserve.lan.xcllnt.net, Sun Jul 18 04:50:11 UTC 2010)
Memory: 1048576KB
Booted from: cd

Loading /boot/defaults/loader.conf 
/boot/kernel/kernel data=0x72c6b8+0x3e280 syms=[0x4+0x5ac10+0x4+0x7d8ad]
/
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...               
Kernel entry at 0x100100 ...


-------------------------------------------------------------------------------
NETBSD 5.0.2 (netbsd-ofppccd-5.0.2.iso) PPC64


C>> annot manage 'OHCI USB controller' PCI device type 'usb':
>>  106b 3f (c 3 10)

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 3
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,970FX
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...


-------------------------------------------------------------------------------
NETBSD 5.0.2 (netbsd-ofppccd-5.0.2.iso) PPC

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...


-------------------------------------------------------------------------------
NETBSD 5.0.2 (netbsd-prepcd-5.0.2.iso) PPC

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...
>> Not a bootable ELF image
No valid state has been set by load or init-program

0 > 


-------------------------------------------------------------------------------
SLES 11 SP1 PPC

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...
No valid state has been set by load or init-program

0 > 


-------------------------------------------------------------------------------
AIX 4.3.3 PPC, AIX 5.1 PPC, AIX 6.1 PPC

>> =============================================================
>> OpenBIOS 1.0 [Aug 17 2010 14:41]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
Welcome to OpenBIOS v1.0 built on Aug 17 2010 14:41
Trying cd:,\\:tbxi...