Datron 1062 - Page 45

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3. 8. 1.1 Software Overview
The system uses the
technique
of
a
looping
prioritised
job
scheduler
(see
Fig. 3.34).
Each job
driven from
the
scheduler is
controlled by a flag
in the system workspace
which is set when the job
is required to be run and cleared
when completed.
Priority of activation
is
ensured by
making each job exit
on completion, to the top of the
schedule.
Program
Modules:
The program
memory is split
into
a
series of
functional
modules,
each module
corresponding
fairly
closely to a
major
functional area and
hence to
one
of the
jobs
activated by
the job
scheduler, the
larger ones
being
sub-divided,
see Drawing
No. 890043.
FIG.
3.34
JOB SCHEDULER