HP 25 Owner's Handbook Manual page 47

30
11
17
The Automatic Memory Stack 43
T
Z
Y
X
T
Z
Y
X
T
Z
Y
x
0.00
0.00
16.00
30.
0.00
0.00
0.00
46.00
0.00
0.00
46.00
11.
T
0.00
z
y
X
T
Z
Y
X
0.00
0.00
57.00
0.00
0.00
57.00
17.00
T
0.00
z
y
X
0.00
0.00
74.00
30 writes over the 16 in X.
16 a nd 30 are ad ded together.
The answer, 46, is displ ayed.
11 is keyed into the displayed
X-register. The 46 in the stack
is automatically raised .
46 a nd 11 are add ed together.
The a nswer, 57 , is displayed .
17 is keyed into the X-register.
57 is a utomaticall y entered
into Y .
57 a nd 17 are added together
for the final a nswer.
After any calculation or number manipu lation , th e stack auto-
matically lifts when a new number is keyed in. Beca use opera-
tion s are perfo rmed when the operations are pressed, the length
of suc h chain problems is unlimited unless a number in one of
the stack registers exceed s the range of the calc ulator (up to
9.999999999
x
10
99 ).
In additio n to the automa tic stack lift after a calculation , the
stack a utoma ticall y drops durin g calcu lations involving both