HP HP-25 - Page 47

The Automatic Memory Stack 43
T 0.00
30 z 0.00
Y 16.00
X 30. 30 writes over the 16 in X.
T 0.00
4 0.00
+
Y 0.00 16 and 30 are added together.
X 46.00 The answer, 46, is displayed.
T 0.00
11
4
0.00
11
is
keyed
into
the
displayed
Y 46.00 X-register. The 46 in the stack
X 11. is automatically raised.
T 0.00
z 0.00
+
Y 0.00 46 and 11 are added together.
X 57.00 The answer, 57, is displayed.
T 0.00
17 z 0.00 17 is keyed into the X-register.
Y 57.00 57 is automatically entered
X 17.00 intoY.
T 0.00
z 0.00
Y 0.00 57 and 17 are added together
X 74.00 for the final answer.
After any calculation or number manipulation, the stack auto-
matically lifts when a new number is keyed in. Because opera-
tions are performed when the operations are pressed, the length
of such chain problems is unlimited unless a number in one of
the stack registers exceeds the range of the calculator (up to
9.999999999 x 1099),
In addition to .the automatic stack lift after a calculation, the
stack automatically drops during calculations involving both