K
YBOARD
Switches ac line power
to
the Calculator. Application
of
ac line power lights the register designators
at
the
right
of
the cathode ray tube.
Selects the entry and
display units
for
the trigonometric
functions.
Selects the mode
of
operation.
RUN:
used to perform calculations, address the pro-
gram counter and execute a program.
PROGRAM:
used to enter a program
from
the keyboard
and verify a program.
Selects the mode
of
display.
FLOATING
DECIMAL
POINT
: the d1splay consists
of
a ten-
digit
number and a
two-d1g1t
exponent. indicat-
ing the power
of
ten
multiplier.
NUMBER
12,345.67898
DISPLAY
1.234567898
X
104
I 2 34
56
7 898
0'1
FIXED
DECIMAL
POINT
: the number is displayed with the
decimal pomt
correctly located. The dec1mal
wheel
sets the number
of
places
to
the
nght
of
the dec1mal point. The least sign1ficant
d1g1t
1s
rounded.
lf
the number overflows
to
the left
of
the decimal point,
the
display
for
the overflowed
register reverts
to
floatmg
dec1mal point.
DECIMAL WHEEL SETTING
5
3
7
DISPLAY
I 2 3
'I
5.6
7 8 9 8
12
3 4
56
1_9_
t
Leading Zeros
Blanked
t
Last
D1g1t
Rounded
Number too
large for
th
is settmg - automatically
s
hift
s to
floating
decimal
point.
T.
h7
error
light
indicates an illegal operation such as
di
-
~tSion
by 0 .•.
-v=:-;,
.
sin-t
x ( x > 1),
ln
x
(x
<
O).
An
Illegal operatton
dunng
program execution will not stop
the program.
7
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