It's likely an MBus issue. The original Galaxy architecture specification
did not, IIRC, envision MBus speeds that high. It envisioned a couple of
Ross modules and the first Viking modules, but that's it. Then Ross
suicided with early HyperSparc (like, having a srmmu implementation that
randomly cleared MODIFIED bits in ptes).

From what you said, I would doubt it's an OBP issue, but I sure could 
be wrong. At any rate, I would worry about running this board on a 690
anyway.


On Sun, 9 Jan 2000, Herb Peyerl wrote:

> buhrow@lothlorien.nfbcal.org (Brian Buhrow)  wrote:
>  > 	What version of PROM is in the 690?  It could be it takes a different 
>  > firmware version than the 100MHZ version?  Also, what's the MBUS speed set
>  > to?  I believe the 150MHZ chips want 50MHZ MBUS, but the 100MHZ might want
>  > 40?
> 
> hmm... I don't know about the firmware version. Though '2.1' rings a bell
> but I could be way out to lunch.
> 
> but MBUS speed is interesting. I'll check that too.
> 
> thanks for the pointers.
>