Finally we could close another ancient PR port-arc/11443.
After several years, we got the native bootloader and then had
sysinst which would do apprpriate partitioning for the bootloader,
so I've noted the last difficult part, how to specify boot commands
on the ARC BIOS.
I still wonder how many possible users of NetBSD/arc are there
who will need this topic though... ;-p
tsutsui