>  It would be interesting to have a
> netbsd kernel with only ethernet and then with just
> jazzsiop1 enabled to see if it's specific to jazzsiop0.
>

I might be able to do thatnormally the scsi configuration for r2200
is as follows:
arcsiop0        at jazzio?
arcsiop1        at jazzio?
scsibus*        at arcsiop?
I will try buld kernel where last line
is scsibus1 at arcsiop1 ( it may not build).

> It would be interesting to see if the clock is getting
> interrupts.