Introduction
The TRS-80 X-Pad
is basically
an X-Y coordinate
digitizer that
converts
a
position on the X-Pad
into an
equivalent
position
on the TV Screen of
the
Color
Computer-
After coordinates
are
digitized by the X-Pad and
sent
to
the Color
Computer, the
Computer reads the data (e.g.,
the
X-Y
coordinates)
and interprets that
information
according
to the program you're currently
running.
Sometimes you
might
use
the X-Pad to calculate
the
distance
between
two points or compute the
area
of
a
geometric
figure. Other times, your
program
might
allow
you to draw lines, boxes, circles, or any other graphic
display you can imagine.
In other words, the
same graphic
figures
you're
drawing
on the X-Pad appear on the Color Computer's TV Screen
—
but in
full
color. As you can imagine, the graphic
possibilities are nearly endless!
It's important to remember, however, that the X-Pad does
not do this "automatically". The action of the X-Pad
depends upon the program you're running with the Color
Computer.
In this manual, we've included many sample programs
you can use, but we're also going to show you how to write
your
own
programs
(and we hope you will!).
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