On Sun, 20 Sep 1998 22:41:17 -0400 (EDT)
der Mouse answered to my question.

>If you have any OS on the SS2, you can do it from the miniroot.

The internal disk is broken...

>If you have an external SCSI disk you can use, that would help; you
>could then put a Sun-compatible label on it with sunlabel (which I can
>mail to anyone who wants it)

Please mail me this. I've some spare HD.

>...newfs it on your mac68k (it won't like
>the Sun label, probably, but you can newfs the c partition anyway, with
>a small size if you don't want to take up the whole disk), untar the
>binaries, compile and run the sparc installboot on the mac68k box (I
>believe - I have used a binary built from the sun3 installboot source
>on a sparc with success), and thus generate a bootable disk for the
>SPARC.

>Once you have the SS2 booted under NetBSD from any source, you can
>label and newfs its own disk, install things, and you're home free.

Many thanks to everyone for help. Later I'll let you know if everything
runs well.

Fabrizio