Programming 75
Introductory Program
The
area
of
a sphere program you wrote, recorded, and executed
in
the introduction showed you that the sequence
of
keystrokes
used to solve a problem manually
is
the same s
equence
used
in
a program.
Now
let's return
our
attention to that program to
exp
lain the information displayed in
PRGM
mode.
First, set the
PRGM
-
RUN
switch to
PRGM
PRGM'-RUN
so th
at
the sequence
of
keystrokes w
ill
be re
corded
for later
exec
ut
io
n. Second, press D I PRGM I to clear the calcul
ator
of
previous programs.
The
display wi
ll
show:
I 00
T
hi
s te
ll
s you that you are at the beginning
of
program memory.
Step
00
contains an
automa
tic stop instruction and
ca
nnot be
used to
record
your
program keys
trokes
. Program
keystrokes
are
recorded
in
steps
01
through 49. (See figure below.)
Stack
Storage
W
Ro
R,
R,
I
LASTX
I
R3
R.
Rs
R6
R7
Program
Memory
Step
00
Step
01
Step
02
r---....
..........
Step
46
Step
47
Step
48
Step
49
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