> >>This didn't probe properly with NetBSD 1.4.2 at boot - the memory
> >>size couldn't be determined.

This sounds like an error from the if_ae driver, but...

> >>The largest chip is labelled:
> >>S9148AP C4
> >>DP83932BVF
> >>XJ02197U

...that's a SONIC (if_sn) device.

The problem is probably that it's not probing correctly, so the wrong
driver is trying to attach to it and obviously failing miserably.

If you'd like to look into fixing it, the interesting code will be in
nubus.h, if_ae_nubus.c, if_sn_nubus.c, if_snvar.h, and maybe if_sn.c
and if_snreg.h.

-allen