> Every time we boot the kernel with the EXTMEM setting set, we get the
> following error:
>  | panic: ptdi: 1b9023

You must be running 1.2 or 1.2.1.  Add

	options	NKPDE=24

to your config file, blow away the compile directory, and
re-config/re-build your kernel.  The default value (12, I think) is
too small if you have more than 64MB of memory.  This is computed
dynamically in NetBSD-current, so the problem will go away in 1.3

--Brian;