Central Line Timetable
In message , Peter Corser
writes
The half minute timing accuracy was down to the programme (sequence)
machines stepping every half minute. The timetables on the machines ran in
half-minute time (from 0300 to 0300 the next day) with 0 at midday - half
minute time was the most you could do within the limits of a computer
integer (8 bit - +/-32767 IIRC).
The Central Line computer control ran internally to quarter minute timings,
but the Timetable software used in developing and printing of the published
timetables (and also the computer control timetables) could only cope with
half minute resolution.
Thank you I've saved that.
--
Clive.
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