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Selecting a
Stored
Program
If
the
power
has
not
been
turned off
since the
program was
stored,
that
program
is
available
by
switch
selection.
Assume you
wish
to
select
program
level
1
,
at
the
start
of
a
new
job.
(See Figure
8.)
1.
Raise
CLEAR
to
clear
the card bed. Set
PUNCH/
VERIFY
switch
to
PUNCH.
2.
Set
PROGRAM MODE
to desired
home
program
level
for
start
of next
record.
3.
Press
PROG
SEL
key.
Press
numeric
1
key
(to
select
program
level
1).
Program
level
1
has
been
selected;
the card
punch
is
ready
for the
cards.
To
verify,
set
PUNCH/VERIFY
switch
to
VERIFY,
and
start
the operation.
Note
that
program
selection at
any
position
within
a
record
may
be
done by
performing
step
3
in
the preceding
procedure.
The machine
stays
in
that
program
level until
another
manual
selection
is
made,
or
until
the
column
indicator
goes
from 00
to
01,
at
which
time the
program
level set
by
PROGRAM MODE
is
effective.
Normally,
program
selection
is
done on
field
boundary
columns,
usually the
first
(high-order) position
of
a
field.
If
a
program
selection
is
done
in
the
middle of a
field
(LZ
field
in
verify,
self-check
field,
accumulate,
etc.),
the
machine
changes the
program
level,
but combines
the
original
program with
the
newly
selected
level,
possibly
providing
incorrect
results.
Therefore,
make
a
manual
selection
only
when
in
the
first
position
of
a
field,
before
any
keystroke has
been made,
to
prevent
invalid
combina-
tion
programs
from
occurring.
Once
PROG
SEL
has
been
pressed,
the next keystroke
is
limited to data
keys
0-6;
the
keyboard
locks
if
any
other
key
is
pressed.
If
you do
not
want
to
change
the
program
level after
you
have
pressed
PROG
SEL,
then
either
select
the
level
you
are
in,
or
field
backspace
to cancel the
program-select condition,
and
continue.
Figure
8.
Selecting the
Stored
Program
If
the
column
indicator
is
in
column
00,
and you
press
PROG
SEL,
then
set
REC ADV/CARD FEED
to
AUTO
(not
a
normal
sequence); the
column
indicator
advances
to
column
01.
The
next keystroke
is
a
program-selection
keystroke;
therefore,
if
it is
not a 0-6 key, the
keyboard
locks. If
it
is
a 0-6
key, the
program
changes
to that
program
level,
and
the
column
indicator
remains
at
column
01.
Supplementary
Operations
31
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