Texas Instruments TI Programmable 57

a
eS
PROGRAM
EDITING:
[G70] (2nd) nn
(2od)
GN
(2nd)
ee
a
—
Tue
Bacxstep
Key
This
key
operates
in
“learn”
mode
only,
and
lets
you
step
back
through
your
program
one
step
at
a
time.
Press
repeatedly
to
go
back
through
your
program
codes.
(This
key
also
has
no
code
of
its
own
and
can't
be
entered
as
a
program
step.)
[GTO]
[2nd]
nn
As
was
already
mentioned,
this
key
sequence
can
be
used
when
out
of
“learn”
mode
to
go
directly
to
any
program
step.
Press
[RN
to
get
out
of
“learn"
mode,
then
press
05.
Then
press
again.
The
display
shows
05
71
—
you're
at
step
5
in
the
program
which
is
the
instruction.
To
CuHanceE
or
Eprr
a
Procram:
You
can
write
over
Program
steps,
blank
out
program
steps,
insert
steps
or
delete
steps,
Let's
take
a
quick
look
at
each
of
these:
To
Wrire
Over
a
Program
Step:
Just
get
to
the
exact
Step
you
want
to
write
over,
and
simply
enter
the
new
keystroke
or
keystroke
sequence.
The
new
instruction
will
write
over
the
old
one
and
replace
it.
(The
display
will
move
on
to
the
next
step
as
soon
as
you
do
this,
so
you
can
go
back
and
check
the
new
code
with
the
key.)
—
Tue
“No
Operation
on
NO-OP”
Key
SEQueNce
This
sequence
lets
you
blank
out
any
instruction
in
your
program
with
a
“NO-OP”
instruction
that's
simply
ignored
by
the
calculator.
The
L
he
|
key
sequence
lets
you
leave
blank
spaces
in
a
program
you
can
fill
in
later,
or
lets
you
“blank
out”
any
instruction
you
wish.
Just
step
to
the
instruction
you
want
to
blank
out
while
in
“learn’’
mode,
and
press
[2nd]
A
NO-OP
instruction
(code
46)
will
replace
the
old
one.
Lins}
—
“Insert”
Key
SEQUENCE
This
sequence
allows
you
to
insert
additional
steps
in
a
program
easily.
If
you
want
to
add
instructions
to
your
program,
step
to
the
program
step
that's
right
at
the
point
you'd
like
to
add
additional
steps
(while
in
“learn”
mode),
Then
press
a.
This
moves
all
instructions
from
that
point
on
down
by
one
location,
and
leaves
a
blank
space
at
the
location
you're
at.
Now
you
can
add
a
new
instruction,
To
add
more
instructions,
just
repeat
the
process,
Note:
Any
step
at
location
49
will
be
“pushed
off’
and
lost
when
you
press
ia.
3-15