A[
15
T t
Z z
Y
y
X 3
Recall
Arithmetic
A
12
|
T f
Z z
Y
y
STOIi-
11
A I X 3
Result:
15-3,
that
is,
A-x.
Recall
arithmetic
uses (rcl](T)/ fRcTlFI,
rRCLTxl,
or
fRCpm
to do
arithmetic in the X-register using a recalled number and to leave the
result in the display. Only the
X-register
is affected; all other stack
registers are unaffected.
New
x = Previous x
{+,
—,
x,
^-} Variable
For example, suppose you want to divide the number in the X-register
(3, displayed)by the value in A
(12).
Press
fRCLl
f+1
A.
Now x = 0.25,
while
12
is
still
in
A.*
iRCLll+U
*
12
|
T
f
Z
z
Y
y
X
0.25
12
T t
Z z
Y
y
X
3
(rcOlDla]
X
Result:
3-M2,
that
is,
x-M.
*
Recall
arithmetic
savesmemory
space
in
programs.
Using
I
RCL
I\T\ A(one
instruction)
uses
half as much memory as I
RCL
IA,
[T]
(two
instructions).
3:
Storing
Data
Into
Variables
51
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