OTRONA ATTACHE Series Manual page 41

calculator
~ ~
and
X
Registers
For simple calculations, the X and Y Registers are the only areas of the
display where figures appear. The X register is the "active" area for
the current entry that is being keyed, and also serves as the first
storage register in the stack.
'When you key a number, it appears as the current entry on the X Register
line of the display. When
RETURN
or a function key is pressed, the
Dumber is "stored" in the X Register and another number can be keyed as
the current entry.
For example, if you key
100
and press
RETURN
Y. REG.
0.00
x.
REG. 100
(first number)
The number you keyed was displayed as the current entry in the active
area when
it
was keyed. When
RE~RN
was pressed, the number was stored
in the X Register. When a second number is keyed, that number appears as
the current entry on the X Register line of the display and the first
number is "bumped" up to the Y Register.
For example,
if
you key
50
Y. REG. 100
(first number)
x.
REG. 50
(second number)
The first number is now stored in the Y Register and the second number is
displayed in the active area of the X Register. When a function key is
activated, the function is performed on the numbers displayed in the X
and Y registers. The result of the calculation is stored in the X
Register.
For example, if
you press the + key
Y. REG.
0.00
(cleared)
X. REG. 150
(the result of the calculation 100
+
50)
Notice in the example above that the X Register is highlighted on the
display before any entries are made, but when a number is keyed, the new
number is not highlighted. Then when the value is "stored" in the X
Register, it appears highUghted again.
Highlighting differentiates between the current entry and the stored
value in the X Register. The stored value is highlighted and the current
entry appears without screen highlighting.
6-5
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