<s>
The	O
Asus	B-Architecture
Media	I-Architecture
Bus	I-Architecture
is	O
a	O
proprietary	O
computer	B-General_Concept
bus	I-General_Concept
developed	O
by	O
Asus	O
,	O
which	O
was	O
used	O
on	O
some	O
Socket	B-General_Concept
7	I-General_Concept
motherboards	B-Device
in	O
the	O
middle	O
1990s	O
.	O
</s>
<s>
It	O
is	O
a	O
combined	O
PCI	B-Protocol
and	O
ISA	B-Architecture
slot	I-Architecture
.	O
</s>
<s>
While	O
similar	O
to	O
PCI-X	O
in	O
appearance	O
,	O
the	O
extension	O
contains	O
4	O
additional	O
pins	O
(	O
2	O
on	O
each	O
side	O
)	O
for	O
a	O
total	O
of	O
68	O
.	O
</s>
<s>
The	O
divider	O
between	O
the	O
PCI	B-Protocol
slot	I-Protocol
and	O
Media	O
Bus	O
extension	O
is	O
too	O
wide	O
to	O
support	O
a	O
properly-keyed	O
PCI-X	O
card	O
.	O
</s>
<s>
Despite	O
the	O
very	O
short	O
lifespan	O
,	O
there	O
were	O
at	O
least	O
two	O
revisions	O
of	O
Asus	B-Architecture
Media	I-Architecture
Bus	I-Architecture
–	O
revision	O
1.2	O
and	O
2.0	O
.	O
</s>
<s>
The	O
difference	O
between	O
them	O
is	O
that	O
the	O
latter	O
revision	O
has	O
72	O
pins	O
instead	O
of	O
68	O
so	O
it	O
does	O
not	O
have	O
to	O
use	O
any	O
PCI	B-Protocol
slot	I-Protocol
signals	O
reserved	O
for	O
PCI	B-Protocol
cards	I-Protocol
and	O
PCI	B-Protocol
slot	I-Protocol
shared	O
with	O
the	O
Media	O
Bus	O
slot	O
becomes	O
standards	O
compliant	O
.	O
</s>
<s>
The	O
gap	O
between	O
PCI	B-Protocol
slot	I-Protocol
and	O
Media	O
Bus	O
extension	O
is	O
0.32	O
in	O
.	O
</s>
<s>
Expansion	O
cards	O
designed	O
for	O
this	O
interface	O
included	O
primarily	O
combined	O
audio	O
and	O
video	O
cards	O
,	O
but	O
also	O
some	O
combined	O
SCSI	B-Architecture
and	O
audio	O
cards	O
.	O
</s>
