[GreenKeys] Rock and Roll Teletype 'experts'

[John Honniball]

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