probing pci slots during OpenFirmware based boot operation
 

How do we disable probing of a particular PCI slot thru nvram parameters ?

There is a parameter in nvram pci-probe-mask -1 which means , to probe all the pci slots by defaults.

What value should we set so that , slot say 1 is disabled for probing. ..

Where is this information to be found/explained further ?

Thanks in advance