...
1.
INTRODUCTION
The mouse IS a dev1ce wh1ch is used
for
Inputting Carte
s1an
coo
rd1nates toa
c
om
~
put
er
The inside
of
t
he
mouse contains a pair
of
d1sk
s at nght angles
to
one
another
which
are rotated as t
he
mouse
is
moved. generating electnc
al
pulses
which
convey
coordinate information
to
the
computer
The
d1sks
a
re
rotated
by
a ball
which
is
mounted
in
the
bottom
of
the
mouse
an
d wh1ch c
au
ses X and Y
coord1nate values
to
be generated
when
the
mouse
IS
moved 1n any d1rect1on
over a flat surface. The name
"mouse"
is used simply because
of
the
wh
1ms
i·
cal notion that the device's range
of
movements resemble
the
random
mot
1ons
which
a real mouse
m1ght
make. The mouse
1S
used by pi uggmg 1t
1n
to a socket
on
the
back
of
the
keyboard
of
the
Personal
computer
Note
:
S1nce
the disks inside
the
mouse are rotated by fnct1on b
etween
the
ball
and the surface
over
wh
1
ch
the
mouse
is
moved. proper operation may
not
be
obta1ned
if
the
running surface is very slick This IS
not
a
s1gn
of trouble w1
th
the mouse
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