OTRONA ATTACHE Series Manual page 44

calculator
Key 25
Y. REX:.
x.
REG.
and then press /
Y. REX:.
X. REXi.
500
25
0.00
20
(the previous result)
(the new number)
(cleared)
(the result of the calculation 500 / 25)
The previous result (500) is bumped to the Y Register when the new number
(20) is keyed. The function (/) then divides 500 by 25. The resul t (20)
is then displayed (and stored) in the X Register.
The next step in the problem requires a calculation (5 x 30) that is
independent of the previous calculations, but the results of the previous
calculation must be retained for inclusion at a later time. The RETURN
key will separate the previous result from the current calculation by
bumping that value up the stack.
Key
5
Y. REX:.
20
(the previous result)
X. REG.
5
(the new number displayed as the current entry)
and then press RETORN
Y. REX:. 20
(the previous resul t)
X. REG.
5
(the new number stored in the X Register)
Notice that "5" became highlighted when
you
pressed RETURN. This
indicates that "5" is now the stored value in the X Register (previously
5 was the displayed value). The intermediate (20) was bumped to the Y
Register when the current entry was keyed.
In all of the previous calculations, the second number was keyed and then
a function was performed. The value that was actually stored in the X
Register was the result of the operation, not the second number.
By pressing RETURN instead of a function,
you
have indicated that a new
calculation is being made independent of the previous operations. The
new value in the X Register (5) is the first number in the new
calculation and the second number (30) will
be
entered next.
6-8