"Pat Flannery" wrote in message
...
This is the place to go to:
http://frode.home.cern.ch/frode/crypto/simula/

Noted - thanks.

.....they are small
downloads, and work like a charm; they even let you trace the path the
signal took through the rotors,and light up the letters as well as make
a noise as the rotors rotate.

Cor! Fun!

Steve
(who is seriously considering writing a similar GUI simulation of a
reel-to-reel tape player, simply 'cos I love watching the 10" reels going
round at 15ips.... sad, eh?)
http://www.fivetrees.com