HP HP-67 User Manual

54 The Automatic Memory Stack
Manipulating Stack Contents
The /¥ (roll down), BY(roll up), and (X<} (x exchange y) keys allow
you to review the stack contents or to shift data within the stack for
computation at any time.
Reviewing the Stack
To see how the key works, first load the stack with numbers 1
through 4 by pressing:
4 ENED 3 EFED 2 E5ED |
The numbers that you keyed in are now loaded into the stack, and
its contents look like this:
4.00
3.00
2.00
1. Display.
X
<N
-
When you press @3 (R¥), the stack contents shift downward one
register. So the last number that you have keyed in will be rotated
around to the T-register when you press @3 (RY). When you press
0 again, the stack contents again roll downward one register.
When you press @) (R¥), the stack contents are rotated...
...from this... ...to this.
T 4.00 T 1.00
Z 3.00 Z 4.00
Y 2.00 Y 3.00
X 1. Display. X 2.00 Display.
Notice that the contents of the registers are shifted. The actual
registers themselves maintain their positions. The contents of the
X-register are always displayed, so is now visible.

HP HP-67 Specifications

General

Brand	HP
Model	HP-67
Category	Calculator
Language	English