Specifications
MOUSE
POSITION
REGISTER
The
MOUSE
POSITION
reSister
is
used
as
a
count/direction
resister
by
the
68000
cpu.
This
reSister
will
contain
the
value
of
increments
that
the
mouse
was
moved
since
the
last
·MOUSE
POSITION
REG-
read
by
the
68000
cpu.
address
=
800060
(HEX)
read
only
bit
15
8
7
o
I
Y7
----------------------
YO
I
X7-----------------------
XO
I
-----------------------------------------------~------
---------
bit
15
=
Y7
The
M.S.B.
of
the
Y
position
reSister.
Used
to
indicate
the
direction
of
mouse
movement
in
the
vertical
axis
(Y
axis).
10Sic
1
(3v)
=
losie
0
(Ov)
=
bit
14-8
=
the
value
of
the
mouse
movement
in
the
·Y·
direction
bit
7 =
X7
The
M.S.B.
of
the
X
position
resister.
Used
to
indicate
the
direction
of
mouse
movement
in
the
horizontal
axis
(X
axis).
loSic
1
(3v)
=
loSie
0
(Ov)
=
bit
6-0
=
the
value
of
the
mouse
movement
in
the
·X·
direction.