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Train-numbers on the LU
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February 21st 04, 06:11 PM posted to uk.transport.london
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First recorded activity at LondonBanter: Jul 2003
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Train-numbers on the LU
In article ,
(Adrian) wrote:
) gurgled happily, sounding much like they
were saying :
Binary Coded Decimal is used a lot
with the programme machines and the various remote control of the IMRs
etc. and describers.
In BCD the decimal number is represented by the digits 0 and 1. The
number 4 is represented by 100, 5-101, 6-110, 7-111, 8-1000, 16-10000
Umm, not quite.
In normal Binary, 16 is 10000, but in BCD each decimal digit is coded
separately in four-bit Binary, so 16 would be 0001 0110 - which is why
it's called Binary Coded Decimal.
Note - I have no idea about whether BCD or normal Binary was used...
Sorry, my mistake. I forgot about that. I'll have to look at the programme
machine roll and check what is used - I think it just uses plain binary.
Roger
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