<s>
Serial	B-Device
Digital	I-Device
Video	I-Device
Out	I-Device
(	O
SDVO	B-Device
)	O
is	O
a	O
proprietary	O
Intel	O
technology	O
introduced	O
with	O
their	O
9xx-series	O
of	O
motherboard	B-Device
chipsets	I-Device
.	O
</s>
<s>
SDVO	B-Device
makes	O
it	O
possible	O
to	O
use	O
a	O
16-lane	O
PCI	O
express	O
slot	O
to	O
add	O
additional	O
video	O
signalling	O
interfaces	O
such	O
as	O
VGA	B-Protocol
and	O
DVI	B-Protocol
monitor	O
outputs	O
,	O
SDTV	B-Device
and	O
HDTV	B-Device
television	O
outputs	O
,	O
or	O
TV	O
tuner	O
inputs	O
to	O
a	O
system	O
board	O
containing	O
an	O
integrated	O
Intel	O
9xx-series	O
graphics	O
processor	O
.	O
</s>
<s>
SDVO	B-Device
adaptor	O
cards	O
are	O
variously	O
designated	O
as	O
ADD2	O
(	O
advanced	O
digital	O
display	O
,	O
second	O
generation	O
)	O
or	O
the	O
more	O
feature-rich	B-Architecture
MEC	O
(	O
media	B-Device
expansion	I-Device
card	I-Device
)	O
.	O
</s>
<s>
MEC	O
is	O
sometimes	O
designated	O
as	O
ADD2+	B-Device
in	O
Intel	O
documents	O
.	O
</s>
<s>
Intel	O
often	O
refers	O
to	O
SDVO	B-Device
as	O
Serial	B-Device
DVO	I-Device
to	O
distinguish	O
it	O
from	O
other	O
forms	O
of	O
digital	O
video	O
out	O
associated	O
with	O
prior	O
product	O
generations	O
,	O
such	O
as	O
the	O
AGP	B-Architecture
implementation	O
of	O
DVO	O
and	O
older	O
AGP-style	O
ADD	O
expansion	O
cards	O
which	O
are	O
not	O
SDVO	B-Device
compatible	O
.	O
</s>
<s>
Intel	O
's	O
non-standard	O
extension	O
of	O
the	O
PCI	O
express	O
interface	O
is	O
subject	O
to	O
a	O
patent	O
application	O
Mapping	O
SDVO	B-Device
functions	O
from	O
PCI	O
express	O
interface	O
(	O
)	O
filed	O
on	O
12	O
December	O
2003	O
.	O
</s>
<s>
The	O
patent	O
relates	O
a	O
"	O
presence	O
detect	O
"	O
mechanism	O
to	O
detect	O
SDVO-type	O
expansion	O
cards	O
and	O
enable	O
a	O
pin-remapping	O
of	O
the	O
PCI	O
Express	O
socket	O
to	O
convey	O
SDVO	B-Device
signals	O
.	O
</s>
<s>
As	O
of	O
January	O
2007	O
,	O
Intel	O
has	O
not	O
publicly	O
documented	O
an	O
intent	O
to	O
promote	O
SDVO	B-Device
as	O
an	O
industry	O
standard	O
,	O
despite	O
its	O
potential	O
applicability	O
to	O
any	O
PCI	O
express	O
platform	O
with	O
an	O
Integrated	O
Graphics	O
Processor	O
(	O
IGP	O
)	O
,	O
or	O
the	O
desirability	O
from	O
the	O
consumer	O
perspective	O
that	O
SDVO	B-Device
adaptor	O
cards	O
be	O
compatible	O
and	O
freely	O
interchangeable	O
among	O
all	O
such	O
systems	O
.	O
</s>
<s>
Instead	O
,	O
Intel	O
is	O
actively	O
promoting	O
the	O
development	O
of	O
SDVO	B-Device
drivers	O
across	O
the	O
broad	O
range	O
of	O
operating	O
systems	O
which	O
run	O
on	O
the	O
Intel	O
9xx	O
platform	O
.	O
</s>
<s>
The	O
upshot	O
is	O
that	O
SDVO	B-Device
cards	O
are	O
compatible	O
with	O
a	O
narrow	O
range	O
of	O
Intel-only	O
hardware	O
platforms	O
,	O
but	O
a	O
broad	O
range	O
of	O
software	O
environments	O
within	O
that	O
platform	O
.	O
</s>
<s>
SDVO	B-Device
encoders	O
can	O
be	O
integrated	O
into	O
the	O
motherboard	O
or	O
placed	O
on	O
a	O
PCI	O
express	O
card	O
,	O
allowing	O
video	O
connectors	O
to	O
be	O
added	O
or	O
exchanged	O
at	O
low	O
cost	O
.	O
</s>
<s>
SDVO	B-Device
adaptor	O
cards	O
can	O
be	O
designed	O
for	O
the	O
following	O
purposes	O
(	O
from	O
Intel	O
ADD2	O
quoted	O
verbatim	O
)	O
:	O
</s>
<s>
SDVO	B-Device
adaptor	O
cards	O
are	O
designated	O
as	O
ADD	O
(	O
advanced	O
digital	O
display	O
)	O
or	O
MEC	O
(	O
media	B-Device
expansion	I-Device
card	I-Device
)	O
or	O
the	O
equivalent	O
ADD2+	B-Device
.	O
</s>
<s>
Older	O
ADD	O
cards	O
were	O
AGP-based	O
and	O
did	O
not	O
provide	O
a	O
standard	O
interface	O
,	O
posing	O
difficulties	O
for	O
driver	O
development	O
.	O
</s>
<s>
There	O
are	O
,	O
however	O
,	O
two	O
distinct	O
flavours	O
of	O
ADD2	O
cards	O
:	O
ADD2-N	B-Device
(	O
normal	O
)	O
and	O
ADD2-R	B-Device
(	O
reverse	O
)	O
.	O
</s>
<s>
The	O
ADD2-N	B-Device
cards	O
are	O
reported	O
to	O
work	O
without	O
fuss	O
under	O
Linux	O
with	O
Intel	B-Device
chipsets	I-Device
ranging	O
from	O
the	O
915	O
through	O
to	O
the	O
965	O
.	O
</s>
<s>
A	O
different	O
source	O
claims	O
that	O
ADD2-N	B-Device
are	O
for	O
ATX	B-Language
form-factor	O
systems	O
while	O
ADD2-R	B-Device
is	O
for	O
BTX	B-Device
form-factor	O
systems	O
.	O
</s>
<s>
However	O
,	O
some	O
BTX	B-Device
systems	O
require	O
ADD2-N	B-Device
(	O
e.g.	O
</s>
<s>
According	O
to	O
Reseller	O
Advocate	O
(	O
RAM	O
magazine	O
)	O
a	O
Media	B-Device
Expansion	I-Device
Card	I-Device
(	O
MEC	O
)	O
is	O
"	O
an	O
x16	O
PCIe	O
card	O
with	O
an	O
SDVO	B-Device
silicon	O
module	O
for	O
VGA	B-Protocol
,	O
DVI	B-Protocol
,	O
S-Video	O
,	O
composite	O
,	O
or	O
component	O
output	O
combined	O
with	O
an	O
x1	O
PCIe	O
analog	O
TV	O
tuner	O
"	O
introduced	O
as	O
a	O
"	O
945G	O
platform	O
add-on	O
descended	O
from	O
the	O
old	O
ADD	O
and	O
ADD2	O
cards.	O
"	O
</s>
<s>
The	O
application	O
note	O
for	O
the	O
945G	O
describes	O
the	O
SDVO	B-Device
card	O
interface	O
as	O
requiring	O
a	O
full	O
x16	O
PCI-E	O
slot	O
.	O
</s>
<s>
Intel	O
documents	O
SDVO	B-Device
as	O
existing	O
within	O
the	O
chipsets	O
integrating	O
an	O
Intel	B-Device
Graphics	I-Device
Media	I-Device
Accelerator	I-Device
(	O
GMA	O
900	O
through	O
3000	O
families	O
)	O
.	O
</s>
<s>
The	O
Intel	O
G965	O
series	O
chipsets	O
implement	O
the	O
graphics	O
controller	O
,	O
the	O
consumer	O
engine	O
of	O
the	O
Intel	B-Device
Graphics	I-Device
Media	I-Device
Accelerator	I-Device
3000	O
family	O
.	O
</s>
<s>
From	O
the	O
Intel	O
Desktop	O
board	O
DG965RY	O
Technical	O
Product	O
Specification	O
,	O
section	O
1.5.1.4	O
"	O
Advanced	O
Digital	O
Display	O
(	O
ADD2/ADD2	O
+	O
)	O
Card	O
Support	O
"	O
:	O
</s>
<s>
The	O
GMCH	O
routes	O
two	O
multiplexed	O
SDVO	B-Device
ports	O
that	O
are	O
each	O
capable	O
of	O
driving	O
up	O
to	O
a	O
200	O
MHz	O
pixel	O
clock	O
to	O
the	O
PCI	O
Express	O
x16	O
connector	O
.	O
</s>
<s>
The	O
SDVO	B-Device
ports	O
can	O
be	O
paired	O
for	O
a	O
dual	O
channel	O
configuration	O
to	O
support	O
up	O
to	O
a	O
400	O
MHz	O
pixel	O
clock	O
.	O
</s>
<s>
When	O
an	O
ADD2/ADD2	O
+	O
card	O
is	O
detected	O
,	O
the	O
Intel	B-Device
GMA	I-Device
X3000	O
graphics	O
controller	O
is	O
enabled	O
and	O
the	O
PCI	O
Express	O
x16	O
connector	O
is	O
configured	O
for	O
SDVO	B-Device
mode	O
.	O
</s>
<s>
SDVO	B-Device
mode	O
enables	O
the	O
SDVO	B-Device
ports	O
to	O
be	O
accessed	O
by	O
the	O
ADD2/ADD2	O
+	O
card	O
.	O
</s>
<s>
An	O
ADD2/ADD2	O
+	O
card	O
can	O
either	O
be	O
configured	O
to	O
support	O
simultaneous	O
display	O
with	O
the	O
primary	O
VGA	B-Protocol
display	O
or	O
can	O
be	O
configured	O
to	O
support	O
dual	O
independent	O
display	O
as	O
an	O
extended	O
desktop	O
configuration	O
with	O
different	O
color	O
depths	O
and	O
resolutions	O
.	O
</s>
<s>
This	O
chipset	O
allows	O
the	O
ADD2/MEC	O
design	O
to	O
support	O
TV-out	B-Device
(	O
composite	O
video	O
)	O
,	O
TMDS	B-Protocol
for	O
DVI	B-Protocol
1.0	O
,	O
LVDS	B-Architecture
,	O
single	O
device	O
operating	O
in	O
dual-channel	O
mode	O
,	O
VGA	B-Protocol
output	O
,	O
HDTV	B-Device
output	O
,	O
HDMI/UDI	O
support	O
(	O
when	O
used	O
with	O
the	O
HD	O
Audio	O
Link	O
)	O
.	O
</s>
