<s>
DCB	O
(	O
Digital	B-Architecture
Control	I-Architecture
Bus	I-Architecture
,	O
Digital	O
Connection	O
Bus	O
or	O
Digital	B-Architecture
Communication	I-Architecture
Bus	I-Architecture
in	O
some	O
sources	O
)	O
was	O
a	O
proprietary	O
data	B-General_Concept
interchange	I-General_Concept
interface	O
by	O
Roland	O
Corporation	O
,	O
developed	O
in	O
1981	O
and	O
introduced	O
in	O
1982	O
in	O
their	O
Roland	O
Juno-60	O
and	O
Roland	O
Jupiter-8	O
products	O
.	O
</s>
<s>
The	O
DCB	O
interface	O
was	O
made	O
in	O
2	O
variants	O
,	O
the	O
earlier	O
one	O
used	O
20-pin	O
sockets	O
and	O
cables	O
,	O
later	O
switching	O
to	O
the	O
14-pin	O
Amphenol	O
DDK	O
connector	O
vaguely	O
resembling	O
a	O
parallel	B-Device
port	I-Device
.	O
</s>
