<s>
The	O
PC-50x	B-Application
Family	I-Application
(	O
also	O
known	O
as	O
SD-050	B-Application
,	O
SD-070	B-Application
,	O
SD-090	B-Application
,	O
9015	B-Application
)	O
is	O
a	O
series	O
of	O
home	B-Device
video	I-Device
game	I-Device
consoles	I-Device
belonging	O
to	O
the	O
first	B-Device
generation	I-Device
prevalent	O
in	O
Europe	O
between	O
1977	O
and	O
the	O
early	O
1980s	O
,	O
all	O
produced	O
in	O
Asia	O
.	O
</s>
<s>
The	O
designation	O
PC-50x	O
of	O
the	O
series	O
derives	O
from	O
the	O
name	O
of	O
the	O
cartridges	B-Protocol
(	O
PC-501	O
,	O
PC-502	O
...	O
)	O
.	O
</s>
<s>
The	O
consoles	O
do	O
not	O
have	O
a	O
central	O
processor	O
;	O
all	O
the	O
games	O
are	O
implemented	O
thanks	O
to	O
the	O
individual	O
chips	O
in	O
the	O
cartridges	B-Protocol
,	O
all	O
based	O
on	O
the	O
chip	O
family	O
AY-3-8xxx	O
of	O
General	O
Instrument	O
.	O
</s>
<s>
The	O
family	O
also	O
includes	O
the	O
so-called	O
"	O
9015	B-Application
"	O
series	O
in	O
which	O
it	O
changes	O
the	O
name	O
(	O
9015-A	O
,	O
9015-B	O
...	O
)	O
and	O
changes	O
the	O
shape	O
of	O
the	O
cartridges	B-Protocol
but	O
uses	O
the	O
same	O
AY-3-8xxx	O
chips	O
.	O
</s>
<s>
Features	O
common	O
to	O
all	O
the	O
consoles	O
in	O
the	O
family	O
are	O
the	O
10	O
keys	O
for	O
choosing	O
the	O
game	O
,	O
a	O
start/reset	O
button	O
,	O
4/5	O
switches	O
for	O
game	O
settings	O
and	O
two	O
joystick	B-Device
with	O
one	O
button	O
on	O
each	O
.	O
</s>
