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1
6
Sun-3/75
Hardware
Installation
Manual
keyboard now.
CAUTION
Once
the
system has been
powered up by
turning the
AC
power
ON
(described further on)
DO NOT
connect or disconnect
either
the
keyboard
or
the
mouse. Connection or
disconnection of the
keyboard
or
mouse when
the
AC
power
has been turned
ON
could
result in
permanent
loss
of
func-
tionality to
the
keyboard
or the
mouse.
Take
out
the
mouse
pad,
a hard shiny
metallic plate
about
9
inches
by
1
inches.
The mouse
sits
on
the
shiny
side
of
the
pad which
has
the
grid,
and
the
pad must be
oriented
so
that
its
length
is
horizontal
in relation
to
the
mouse
(see the figure
below, "Orienting
the
Mouse on
its
Pad").
NOTE
After
you
have
set
up your
system,
installed
UNIX.t and
run
SunWindows™,
you
will
notice that
moving
the
mouse
across
the
face of
the
pad
will
cause
an
arrow-shaped
cursor
to
move
across
the display.
Figure 2-7
Orienting
the
Mouse
on
its
Pad
Connecting
the
Ethernet
Cable
to
the
Sun-3/75t
Find
the
Ethernet cable.t
It
is
a
thick
cable
with
15-pin
D
connectors
at
both
ends.
NOTE
Before going
on,
you
may
wish
to
make
certain
that
your Sun-3
175
CPU
board
is
properly configured for
your
particular Ethernet
transceiver.
The board comes
from
the
factory
set
for Level
2.
If
you
are using
a
Level
1
Ethernet
transceiver,
the
shunt
shorting pins
7 and 8 cfJ2503tt
at
board
location
K-J
1
must
be
IN. If
you
are using
a
Level 2 Ethernet
transceiver, the
shunt
must be
OUT.
IfJ2503
is
tUNDC
is
a
trademark of
AT&T
Bell Laboratories.
tThis
section
is
optional,
and
is
only
for those
who
need
to
connect
their
Sun-3/75
to
an
Ethernet.
ttOn some
early
versions of the
CPU
board,
this
was
labelled
J2505
Revision
A
of
31
September 1986
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