Datron 1061 - Software Overview

34
3.8.1.1
Software
Overview
The
system
uses
the
technique
of
a
loop.ing
prioritised
job
scheduLr
i;Ë¡;.';:ääi.'Ëã.r'
job
driven
from
the
scheduler
¡t
"oi.roriuj'b;;iì.;l;
the
svstem
workspace
which
is
*,
*nå"
,iï¡."J
i. rräiirr¿
io
oâ
run
and
cleared
when
compl.i.l.
'Ë.¡år'*-"
åi'.",iru,io¡
is
ensured
bv
makins
u."tr
io¡'
.;i;;;'"JroiJon,
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.
I
I
I
I
I
I
I
I
I
I
¡
I
;
¡
;
FITTED
?
OPTION
IS PROGRAM
BUFFER
NON-EMPTY
EB
UT
ts
ROR READ-O
REOUIRED
?
HAS
DATA
BEEN
ACCEPTED
FROM
A-D ?
HAS
DATA
BEEN
PROCESSED
?
FOR
IN
ADY
IS
BCD
DATA
ONF
IS
A-D
READY ?
ts
KEYEOARD
BUFFER
NON-EMPTY
?
OUTPUT
DATA
TO
REMOTE
INTERFACE
COMPUTE
LIMIT
OF UNCERTAINTY
ACCEPT
DATA
FROM
A-D
CONVERTER
CA
COMPUTE
FUNCTION
OT
READING
AS
REOUIRED
AA
PROCESS
REMOTE
COMMAND
PROCESS
KEYBOARD
COMMAND
DISPLAY
DATA
ON
FRONT
PANEL
RESTART
SUSPENDED
PROGRAM
INITIALISE
HAS TIME
GUARD
EXPIRED
?
Yes
No
Yes
(}
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
FIG.3.34
JOB
SCHEDULER