Hi,
I can imagine a syntax like this:
<controller type='usb' index='0' model='ich9-ehci1'>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master id='usb' startport='0'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master id='usb' startport='2'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master id='usb' startport='4'/>
</controller>
I think this should have been just something like ...
<controller type='usb' model='ich9-ehci-with-companions' />
... since day one. It's not like those are 4 independant usb controllers.
cheers,
Gerd