<s>
Dual-ported	B-General_Concept
RAM	I-General_Concept
(	O
DPRAM	B-General_Concept
)	O
is	O
a	O
type	O
of	O
random-access	B-Architecture
memory	I-Architecture
that	O
allows	O
multiple	O
reads	O
or	O
writes	O
to	O
occur	O
at	O
the	O
same	O
time	O
,	O
or	O
nearly	O
the	O
same	O
time	O
,	O
unlike	O
single-ported	O
RAM	B-Architecture
which	O
allows	O
only	O
one	O
access	O
at	O
a	O
time	O
.	O
</s>
<s>
Video	O
RAM	B-Architecture
or	O
VRAM	O
is	O
a	O
common	O
form	O
of	O
dual-ported	O
dynamic	O
RAM	B-Architecture
mostly	O
used	O
for	O
video	O
memory	O
,	O
allowing	O
the	O
CPU	B-General_Concept
to	O
draw	O
the	O
image	O
at	O
the	O
same	O
time	O
the	O
video	O
hardware	O
is	O
reading	O
it	O
out	O
to	O
the	O
screen	O
.	O
</s>
<s>
Apart	O
from	O
VRAM	O
,	O
most	O
other	O
types	O
of	O
dual-ported	B-General_Concept
RAM	I-General_Concept
are	O
based	O
on	O
static	B-Architecture
RAM	I-Architecture
technology	O
.	O
</s>
<s>
Most	O
CPUs	O
implement	O
the	O
processor	B-General_Concept
registers	I-General_Concept
as	O
a	O
small	O
dual-ported	O
or	O
multi-ported	O
RAM	B-Architecture
(	O
see	O
Register	B-General_Concept
File	I-General_Concept
)	O
.	O
</s>
