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1
.
INTRODUCTION
The mouse
IS
a
dev1ce
wh1ch is
used for Inputting
Cartes1an
coord1nates
to
a com
~
pu
ter
The inside
of
the mouse
contains a
pair
of
d1sks
at
ngh
t
angles
to one
another
which are rotated
as
the mouse is
moved. generating
electncal pulses
which
convey coordinate information
to the
computer
The d1sks
are rotated by
a
ball which
is
mounted
in
the bottom
of
the mouse
and wh1ch c
ause
s
X and Y
coord1nate
values to be
generated when
the mouse
IS
moved 1
n any
d1
rect1on
over
a
flat
surf
ace.
The name
"mouse" is
used
simply because of
the
wh1 msi·
cal
notion that the
device's
range
of
movements
resemble the
random
mot1
ons
which a
real mouse m1ght
make.
The mouse
1S
used
by
pi uggmg 1
t
1nto
a
socket
on
the back
of
the keyboard
of
the Personal
computer
Note:
S1nce
the disks
inside
the mouse
are
rotated
by f
nct1on
between
the ball
and
the
surface over
wh1
ch
the mouse
is
moved. proper opera
tion may not be
obta1ned if
the
running surface is very slick
This
IS
not
a s1gn
of trouble w
1
th
the mouse
-
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