> Some documents relating to the UltraSPARC-T1 CPUs (niagara) can be
> found here:
> 
> http://opensparc.sunsource.net/nonav/opensparct1.html
> 
> Darren

the main problem (as pointed out at misc@openbsd.org btw) is that 
documentation of the CPU itself, but not about the glue logic 
surrounding it, is (usually) not sufficient.

they claim to be 'open', but there surely are huge differences on the 
meaning of openness ;)