I don't have a KA655 handy.  The rom revision on the KA650 is 5.6, which has
a full set of commands like show dev, etc.  My other KA650 is a very early one
with no commands except for what is in the KA630 rom.  I believe that its rom
revision level is something like 1.2 or close to that.  Strange board that 
one.
I can try swapping the early boardset in and see if that does anything.  I was
thinking that the later boardset/rom was the best one to use.  If I get some 
time,
I may try swapping the board into my 4000/200 and seeing if it can recognize
drives at that speed.  Alas, when it crashed, it totally trashed my usr fs on 
the
affected system, so it will take a day or so to rebuild it enough to get it 
onto more
than its surviving root fs.  Ed is your true friend when all you have left is 
your root
fs...(:+}}...