A "Special Pattern", however, steps level with the corresponding ordinary
pattern, and accordingly when the latter is to be deltaed by Colossus, the former
must be set up in the trigger one back, in the sense that the 2nd position
of the trigger contains the first character of the wheel.
If the same pattern is used both differenced and undifferenced, the
correction cannot be made either by setting or by setting up, but must be made
internally by Colossus.
The following are all one back so as to be in the present place when used
with wheels deltaed on Colossus
(1) The TM switch at the bottom of the Q panel (including not X2oneback when BM is
cut out and the X2 determiner switch is in.)
(2) the jacks not Mu61, not Mu37, not P5, TM on either side of the special pattern
It will be noticed that the labelling is inconsistent.
(a) The five Counters
Colossus counts up to 9999 and then returns to zero.
To increase the speed of operation, Colossus has five separate counters,
which can be used simultaneously either for five (or fewer) distinct runs or for
multiple testing on a single run. Spanning and stepping must be the same for all
runs. The five counters are labelled 1,2,3,4,5, but printed on Colossus records
(b) Switching into counters
To be effective a condition must be switched ( on the Q panel) or plugged
(on the plug panel), into the proper counter. In particular in multiple testing
the condition on each of the remembered impulses must be plugged or switched
to its proper counter.
53G RECORDING OF SCORES
When a count has been completed, i.e. when the stop sign on the tape is
reached, Colossus can transfer it to the "display and the printer.
(a) Set Total
To avoid displaying and printing useless scores a "set total" can be imposed
so that only scores which exceed, or, alternatively, only scores which do not
exceed this set total appear, others being cancelled.
The set total controls for the five counters are independent, and for each
of the five, consist of decade switches reading 0000 - 9999 , and a three-way
switch "<","off",">". With the off position all scores are displayed and printed.
On Colossus 10 S.I.P. ("significance Interpretation" switch on control