Radio Shack TRS-80 X-PAD GT-116 - Page 64

L/R Margin
When
the Pen
is within
about
1"
of either
the right or
left
margin,
this switch
will
be set
(1).
Proximity
When the
Pen
is
within
1"
of
the
Surface, this switch will
be set
(1).
Pen
Switch
When the point
of the
Pen
is
pressed,
this switch
is
set
(1).
For Example,
the Sample
Program
uses
S
=
7 to decide
on
a course of action. From
the
table,
we
can
see that
S
=
7
means
that the
Pen
is
down, within
1"
of one
of
the two
side
margins.
The Pen
Switch is
ON, the L/R
Margin
Switch
is
ON, and the Proximity
Switch
is
ON.
The
Pen
is not within
1"
of
the Top
Margin
so that
switch
is OFF.
For
a second
example,
S
=
15
would
mean
the Pen is
down
in
one
of the upper-left
or right
corner
boxes.
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