15 Jun
2005
15 Jun
'05
11:58 a.m.
Tony Duell wrote:
Said books also contain a description of a lovely
electromechanical FIFO
system used to store train descriptors on the London Underground (and its
associated binary to 1-of-n decoder) ...
You can see the 1-of-n decoder in the London Transport museum
in Covent Gardern. At least, you could last time I went there,
once again it was some years ago. Anyone been there recently?
The actual decoder, BTW, is all done in massive brass, copper and
Bakelite. It's a form of relay logic, I suppose.
--
John Honniball
coredump at gifford.co.uk