I've just put together a 3100, and it's being not nice and refusing to
netboot.  It's a KN01 V7.03 (which isn't even on my own list!).  It's
putting up the "square in the middle of the screen", and nothing else.
When I tftp boot, I get:

	>> boot -f tftp()basil
	872768+39072+71300-47c xfr addr: 0x80030000

Booting via mop just gives the "white square in the middle" after a few
seconds, and nothing else.

A quick scan of the list didn't show anything like this.  I guess I can
netboot Ultrix, and dd the diskimage to one of the RZ23Ls I stuck inside
it, but this is still a worry...

Simon.