Radio Shack Telephone Interface II Manual

,
^t*
—
11.
Priority
of
calculations
The
computer
performs
calculations
from
the left
to
the
right
with
some
exceptions
(for
example,
W
functions,
multiplication
or
division
has
priority
over
addition
or
subtraction).
The
following
lists
the
order
of
operations
of
the
Computer.
1.
Recalling
n and
fixed
memories
A
through
Z.
2.
Recalling
memories
in the
form
of
A
( )
(Recalling
dimensioned
memories)
3.
Power
directly
preceded
by
multiplication
(which
involves
memory)
2A
A
3,
for
example.
4.
Multiplication
where
*
is
omitted:
2A,
7rB
or
AB
(see page
30)
5.
Functions
(SIN,
COS,
TAN,
ASN,
ACS,
ATN,
LN,
LOG, EXP,
DMS,
DEG,
INT,
ABS,
SGN,
V")
6.
Power
(
A
)
other
than
as
defined
in
3 above.
7.
Sign
(+,
-)
8.
Multiplication
and
division
{
*
,
/)
9.
Addition
and
subtraction
(+,
—
)
Logical
computation
(
=
,>,<,>=,<
=
,<>)"
Calculations
in
parenthesis
will
occur
first.
In
multiple
parenthesis,
calculations
in
the
inner-
most
parentheses
have
priority
over
all
the
others.
Compound
founctions
(LN ABS A,
EXP
\/~
8)
are
calculated from
right
to left.
A
string
of
powers,
such
as
3
4
2,
is
calculated
from
the right
to
the
left.
10
Levels
of
pending
operation
7
33
3
CE
C3_5
m CD
CSD
CIDCS[SCn20[S32CX][lH^lCE3CZ][n
8
S
®
®
i
As
seen
from
the example
above,
the
Computer
performs
computations
following
a
given
mathe-
matical
formula.
But
this
presupposes
that
the
Computer
has
a place
to
temporarily
store
instructions
or
data
(numerical
values)
that
cannot
be
directly
processed.
Such a
place
is called
a stack
(a
stack
register).
Your
Pocket
Computer
has
a
16-stage function
stack
and
8-stage
data
stack.
Example:
Behavior
of
both
stacks
during
the
execution
of
1.2
+
A
*
(3.5
+
SIN
B) A A
(25)
&
Where
A
=
2.4,
B
-
30,
A(25)
=
3
Angular mode
=
DEG
29

Radio Shack Telephone Interface II Specifications

General

Brand	Radio Shack
Model	Telephone Interface II
Category	Desktop
Language	English