<s>
In	O
computing	O
,	O
a	O
zoomed	B-Architecture
video	I-Architecture
port	I-Architecture
(	O
often	O
simply	O
ZV	B-Architecture
port	I-Architecture
)	O
is	O
a	O
unidirectional	O
video	O
bus	B-General_Concept
allowing	O
a	O
device	O
in	O
a	O
PC	B-Architecture
card	I-Architecture
slot	O
to	O
transfer	O
video	O
data	O
directly	O
into	O
a	O
VGA	B-Protocol
frame	B-Algorithm
buffer	I-Algorithm
,	O
so	O
as	O
to	O
allow	O
laptops	B-Device
to	O
display	O
real-time	O
video	O
.	O
</s>
<s>
The	O
standard	O
was	O
created	O
by	O
the	O
PCMCIA	B-Architecture
to	O
allow	O
devices	O
such	O
as	O
TV	O
tuners	O
,	O
video	O
inputs	O
and	O
MPEG	O
coprocessors	B-General_Concept
to	O
fit	O
into	O
a	O
PC	B-Architecture
card	I-Architecture
form	O
factor	O
and	O
provide	O
a	O
cheap	O
solution	O
for	O
both	O
the	O
laptop	B-Device
manufacturer	O
and	O
consumer	O
.	O
</s>
<s>
The	O
ZV	B-Architecture
port	I-Architecture
is	O
a	O
direct	O
connection	O
between	O
the	O
PC	B-Architecture
card	I-Architecture
slot	O
and	O
VGA	B-Protocol
controller	O
.	O
</s>
<s>
Video	O
data	O
is	O
transferred	O
in	O
real	O
time	O
without	O
any	O
buffering	O
,	O
removing	O
the	O
need	O
for	O
bus	B-Architecture
mastering	I-Architecture
or	O
arbitration	O
.	O
</s>
<s>
The	O
ZV	B-Architecture
port	I-Architecture
was	O
invented	O
as	O
an	O
alternative	O
to	O
such	O
methods	O
as	O
the	O
VAFC	B-Architecture
(	O
VESA	B-Architecture
Advanced	I-Architecture
Feature	I-Architecture
connector	I-Architecture
)	O
.	O
</s>
