> > We still need a sparc tapeboot of some kind.

I have a QIC60 on a Sun4 and it may be in working condition. I may
even find a QIC150. But, I looked at the Sun3 script and I must admit
that I don't quite get the pieces together (in my mind):

molle# head -10 /usr/src/distrib/sun3/MakeBootTape 
#!/bin/sh
#
# Here is a generic script that makes a Sun3 boot tape using
# the files in this directory.  The tape layout is:
#
#   segment 0:  tapeboot
#   segment 1:  netbsd.sun3  (RAMDISK3)
#   segment 2:  netbsd.sun3x (RAMDISK3X)
#   segment 3:  miniroot image
#

I have not found any evidence how to build the tapeboot.  How many
segments should follow? Is one enough (as we need only one type of
kernel) or is there some fixed number expected (one for sun4, sun4c,
sun4m)? 

What is a good kernel config for this? Enable SUN4 in
/usr/src/sys/arch/sparc/conf/INSTALL.

# Options for variants of the Sun SPARC architecure.
# We currently support three architecture types; at least one is required.
options         SUN4            # sun4/100, sun4/200, sun4/300
options         SUN4C           # sun4c - SS1, 1+, 2, ELC, SLC, IPC, IPX, etc.
options         SUN4M           # sun4m - SS10, SS20, Classic, etc.

What more have I forgotten? :-)

Harald.