Radio Shack Telephone Interface II Manual

The
memories
of
the
TRS-80
Pocket
Computer
(A,
A$,
A(1),
A$(1)
B,
B$,
A(2).
A$(2)
26
memories'
Z,
Z$,
A(26),
A$(26)
Data
memory
(Fixed
memory)
A(27),A$(27)
178
memories
or
1424
steps
A(204),A$<204)
Program
memory
Any
program
memory
left
open
(unused)
after
the
programs
are
stored
can
also
be
used
for
data
memories.
When
used
for
Data
memory
it
is
called
a
flexible
memory.
Thus,
the
number
of
available
memories
varies
depending
on
how
many
steps
are
used
to store
programs.
So,
when
using
the
flexible
memory,
you
should
always
check
in
advance
how
many
memory
locations
are
available
(by
using
the
MEM
command).
(For
MEM
command,
refer
to
page
73.)
NOTE:
8
steps
of
program
equals
one
data
memory.
Indirect
designation
An
indirect
designation
of
memories
(variables)
is
a
method
of
designating
an
arbitrary
memory
(numerical
variable)
corresponding
to
its
contents.
The
indirect
designation
is
made
in the
form
of A(B) or
A$(B);
that
is,
a
numerical
variable
is
put
in
a set
of
parentheses.
With
this
method
you
can
specify
all
data
memories
(variables)
according
to
their
contents
-
only
the
integer
parts
of
them
are
effective.
Example:
A(A)
-+
A
numerical
variable
that
is given
a
serial
number
corresponding
to
variable
A.
A$(A(3))
->
A
character
variable
that
is
given
a
serial number
corresponding
to
variable
A(3),
namely
C
(3rd
fixed
memory
location).
Following
are
some
examples
of the
advantages
of
indirect
memory
designation.
47

Radio Shack Telephone Interface II Specifications

General

Brand	Radio Shack
Model	Telephone Interface II
Category	Desktop
Language	English