Program Switch Settings
to
be
in error does
not
necessarily
mean
that
the
source program
cannot
be
com-
piled correctly or
that
the
object program
cannot
be
successfully run. Conversely,
a source
program
which has
been
processed
by
the
Pre-Compiler
and
found free
of error
might
have
certain
undetectable
mistakes in logic, or
be
too large for
the
particular 1620 system
in
use.
The
1620
FORTRAN
Pre-Compiler
cannot
determine
the
intent
of your pro-
gram.
Even
though
no
errors
are
present
in individual source statements,
YOll
should examine
the
final program summary to determine if any logical errors in
the
flow of
the
source program still remain to
be
corrected.
The
possible settings for
the
program switches are shown below
Print
On
Punch
Edited
Input
Typewriter
Source Program
SW
1
S\V
:2
SW
4
Cards/Tape
Yes
Yes
On
On
On
Cards/Tape
Yes
No
On
Off
On
Cards/Tape
No
Yes
On
On
Off
Cards/Tape
No
No
On
Off
Off
Typewriter
No
Yes
Off
On
On/Off
Typewriter
No No
Off Off
On/Off
Switch 3 has
the
following function:
On
-
Error
correction routines are bypassed.
Off -
Error
correction routines
are
not
bypassed.
NOTE:
Switch 4 is normally off during
typewriter
input.
When
you
make
an
error
in
typing
either
an
original or a corrected source statement,
turn
this switch
on, press
the
release
and
start keys,
and
return
the
switch to its normal
OFF
position. You
must
then
retype
the
entire statement.
Processing
with
the
Pre-Compiler
Program
Loading the
Program-
Card Deck
Loading the
Program-
Tape
File
The
sequence of operations
required
to load
the
program
card
deck is
as
follows:
1.
Clear
core storage to zeros. A suggested
method
for clearing to zero is to:
a.
Press
the
reset key.
b. Press
the
insert key.
c.
Type
the
instruction 16 00010 00000.
d. Press
the
release key.
e.
Press
the
start
key.
f.
When
all storage position
have
been
cleared, press
the
instant
stop key.
2.
Set
the
console program switches for
the
input/output
option you want.
3.
Set
the
overflow check switch to
PROGRAM
and
all
other
check switches to
STOP.
4.
Press
the
reset key.
5.
Place
the
deck
in
the
read
hopper
and
press
the
load key.
The
cards comprising
the
FORTRAN
Pre-Compiler deck
are
punched
with
sequence numbers
in
columns 76
through
80
and
the
deck
must
be
loaded in
sequence.
The
sequence of operations
required
to load
the
program
tape
is
as
follows:
1.
Clear
core storage to zeros, set
the
console program,
and
check switches
as
in
steps
1,
2,
and
3,
just given.
The
FORTRAN
Pre-Compiler Program 77
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