HP 25 Owner's Handbook Manual page 48

44 The Automatic Memory Stack
the X- and Y-registers. It happened in the above example , but
let ' s do the problems differently to see this feature more clearly.
First pressB!3 to clear the X-register. Now, again solve 16
+
30
+
II
+
17
=
?
Press Stack Contents
T
0.00
16
Z
0.00
16 is keyed into the displayed
y
r---:-::
X-register.
~OO
X
L 16.
T
I
0.00
I
mmiD
z
~
16 is copied into Y.
Y
16~
X
16.00
I
T
0.00
30
Z
0.00
30 is written over the 16 in X .
y
16.00
X
30.
T
0.00
mmiD
Z
16.00
30 is entered into Y. 16 is
y
30.00
lifted up to Z.
X
30.00
' T
0.00
II
Z
16.00
II is keyed into the displayed
y
t
30.00
register.
X
11.
T
16.00
mmiD
Z
30.00
11 is copied into Y. 16 and 30
y
11.00
are lifted up to
T and Z
X
11.00
respectively.
T
16.00
l
17
Z
30.00
17 is written over the II in X .
y
11.00-l
X
17~