HP 9100A - ARITHMETIC AND FUNCTIONAL KEYS; BASIC ARITHMETIC OPERATIONS

ARITHMET IC KE YS
The arithmetic keys operate on the X and Y registers, entering th e result of the calculat1on mt
the Y register and leaving the X register unchanged.
Adds the contents of the X register
to the contents of the
Y register. The sum is entered into the Y register and the
X regist er is unchanged.
8
+ 4 == 12 ~ y
t
CLEAR
8
4
+
6 + 7 +4 -= 17 ~ y
t
CLEAR
6
7
+
4 +
0.
I 2.
1.{ .
D.
I 1.
1.{ .
Subtracts the contents of the X reg1 s ter from the c ont e nt s
of the Y register. The difference 1s entered mto the Y
register and the X register is unchanged.
1 7 -9 == 8 ~ Y
CLEAR
1
t
7
9
47 - 19 - 8 + 5 -= 25 ~ y
t
CLEAR 4
7
1
9 -
8
-
5
+
D.
8.
9.
0.
2 5.
5
1