"Peter Corser" wrote in message
...
....
As an aside you may be aware that the train running numbers (set numbers)
shown in the time table were the direct digital equivalent of a hex
number - 477 digital was stored as 477 hex and 477 was the highest number
normally used (there was also nothing between x78 and x99) which also
saved bits (ot sequence machine fingers).

You may mean octal, not hex?
--
David Biddulph