HP 15c Scientific manual Lost

34 Section 3: The Memory Stack, LAST X, and Data Storage

shading indicates that the contents of that register will be written over when the next number is keyed in or recalled.)

T

Z

Y

X Keys:

t

z

y

x

lost

z

y

x

1

1

lost

y

x

1

1

v2

y

x

1

2

lost

x

1

2

2

v

T	x
Z	1
Y	2
X	2

Keys: 3

x

1

2

3

lost

1

2

3

3

v4

1

2

3

4

) (roll down), ( (roll up), and ® (X exchange Y). ) and ( roll the contents of the stack registers up or down one register (one value moves between the X- and the T-register). No values are lost. ® exchanges the numbers in the X- and Y-registers. If the stack were loaded with the sequence 1, 2, 3, 4, the following shifts would result from pressing ))and ®.

T

Z

Y

X

Keys:

1

2

3

4

4

1

2

3

)

1

2

3

4

(

1

2

4

3

®