> >This is what I was looking for  ;-)  and having read isareg.h, it appears
> >that the addresses I'm attempting to read are beyond IO_ISAEND (0x3ff),
> >which would explain the result.
> 
> Just as an aside, have you enabled the extended registers in the Aladdin 
> configuration space?  This is the code we use in Linux to do this:

D'oh!!  No, I had missed those...it's going nicely now - thanks for your
help, David.