Open Firmware 3; I have 2 OSs (OS 9 and NetBSD 2.0) on this computer.

In OF, nvalias [alias] [boot device] works as far as I can make out.
nvstore produces, without exception, 'NVRAMRC not valid.'

I've reset PRAM and tried reset-nvram in OF; neither have helped.

Is resetting PRAM the same as resetting NVRAM, or are they two 
different things? Ought my next step be downloading the 90MB Mac OS 9.1 
update so I can run the firmware updater? -- just tell me whether it 
would help, so I don't spend two days downloading for nothing. As far 
as I can see it's not NVRAM that's the problem; it's the NVRAMRC file. 
I don't know how to alter this.