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1l
PCI/I-486SP3G
User's Manual
Using Your Mainboard
In
addition
to the operating instructions in
your system
manual,
there
are a few additional
things
specific
to the mainboard
you
may
need
to know.
This
section explains
how to make hardware
settings
on
the mainboard and how the
system configuration
record works.
Following are
useful information
on
the board's "Green"
features,
IRQs, 1/0
ports and peripheral device
coru1ectors.
Hardware Settings
There are a
variety
of
hardware
setting options on
the board.
These specify
what hardware is installed
on
the board. The
settings
are made
using
something called 'jumpers'. A
jumper
is a set of
two
or
more metal
pins with a plastic
base mounted
on
the mainboard.
A plastic jumper 'cap'
is used
to establish
hardware
settings. This cap
has
a
metal
contact inside
which
fits over
two pins to
create an elec-
trical contact between
them.
Some
jumpers
only
have two
pins, others
have three. The jump-
ers are sometimes combined into sets called
jumper blocks,
where all
the jumpers
in
the
block
must
be set
together to
establish the
hard-
ware
setting.
The
figure below shows
how this looks.
Jumpers
and caps
ill il
. , . , . , ,
ll!llllllBll'
.erl
Jumper cap
3-pin jumper
2-pin jumper
Jumper block
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1 - 6
Feature Guide
1l
On the mainboard, the
settings
for
each
jumper
are
printed
on
the
board
with a stylized
bird's-eye view.
For example,
if
a
jumper has
three pins,
connecting, or 'shorting',
the first
and second
pins
creates
one
setting and shorting
the
second
and third
pins creates another.
The
same
type
of
diagram is used in this manual. The jumpers
are
always shown
from the
same
point of view
as shown
in the whole-
board diagram in this
chapter.
The figures below
show
what the
manual diagrams look like and what they represent.
Jumper diagrams
Jumpers are shown like this
Jumper caps like this
Jumper settings like this
Io
G-€)1
Io G-€)1
I G-€) ol
Jumpers in
a 'block'
u
ill
.,.,.,,
.,
..
[O
OJ
[O
0
O
]
[ 0
G-€)[
~
Some jumpers are oriented
vertically; if the pin position
needs to be shown, pin 1 is
marked.
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