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ripple through of carrys which may have started just prior to `
reset.
During the storage command pulse, the clock oscillator
is momentarily clamped preventing any new pulses from entering
the counter.
At the termination of the storage pulse L, the storage registers
4
are locked up at their new condition and the read out tubes they
drive remain fixed in display.
The trailing edge of the storage pulse activates two more functions.
It commands
storage of the state of the "thousands" counter U12B
into storage register U12A.
Also, it triggers overrange Flip-
Flop U13B.
This register is set to zero (lamp off) at the start of
to.
It will toggle to "1" (lamp on) when triggered only if both
Steering inputs are low.
This condition "B" low will occur after
the count of 2, 000 and up to 4,000, which is the stable overrange
condition.
14
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