<s>
The	O
commonly	O
shortened	O
to	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
or	O
just	O
Disk	B-Device
System	I-Device
,	O
is	O
a	O
peripheral	O
for	O
Nintendo	O
's	O
Family	O
Computer	O
home	B-Device
video	I-Device
game	I-Device
console	I-Device
,	O
released	O
only	O
in	O
Japan	O
on	O
February	O
21	O
,	O
1986	O
.	O
</s>
<s>
It	O
uses	O
proprietary	O
floppy	B-Device
disks	I-Device
called	O
"	O
Disk	O
Cards	O
"	O
for	O
cheaper	O
data	O
storage	O
and	O
it	O
adds	O
a	O
new	O
high-fidelity	O
sound	O
channel	O
for	O
supporting	O
Disk	B-Device
System	I-Device
games	O
.	O
</s>
<s>
Fundamentally	O
,	O
the	O
Disk	B-Device
System	I-Device
serves	O
simply	O
to	O
enhance	O
some	O
aspects	O
already	O
inherent	O
to	O
the	O
base	O
Famicom	O
system	O
,	O
with	O
better	O
sound	O
and	O
cheaper	O
gamesthough	O
with	O
the	O
disadvantages	O
of	O
high	O
initial	O
price	O
,	O
slow	O
speed	O
,	O
and	O
lower	O
reliability	O
.	O
</s>
<s>
This	O
includes	O
the	O
vast	O
,	O
open	O
world	O
,	O
progress-saving	O
adventures	O
of	O
the	O
best-selling	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
(	O
1986	O
)	O
and	O
Metroid	B-Device
(	O
1986	O
)	O
,	O
games	O
with	O
a	O
cost-effective	O
and	O
swift	O
release	O
such	O
as	O
the	O
best-selling	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
2	I-Application
,	O
and	O
nationwide	O
leaderboards	O
and	O
contests	O
via	O
the	O
in-store	O
Disk	O
Fax	O
kiosks	O
,	O
which	O
are	O
considered	O
to	O
be	O
forerunners	O
of	O
today	O
's	O
online	O
achievement	O
and	O
distribution	O
systems	O
.	O
</s>
<s>
By	O
1989	O
,	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
was	O
inevitably	O
obsoleted	O
by	O
the	O
improving	O
semiconductor	O
technology	O
of	O
game	B-Protocol
cartridges	I-Protocol
.	O
</s>
<s>
The	O
Disk	B-Device
System	I-Device
's	O
lifetime	O
sales	O
reached	O
4.4million	O
units	O
by	O
1990	O
,	O
making	O
it	O
the	O
most	B-Application
successful	I-Application
console	I-Application
add-on	I-Application
of	I-Application
all	I-Application
time	I-Application
,	O
despite	O
not	O
being	O
sold	O
outside	O
of	O
Japan	O
.	O
</s>
<s>
Retailers	O
also	O
requested	O
for	O
cheaper	O
games	O
;	O
the	O
cost	O
of	O
chips	O
and	O
semiconductors	O
made	O
cartridges	B-Protocol
expensive	O
to	O
make	O
,	O
and	O
often	O
cost	O
a	O
lot	O
of	O
money	O
for	O
both	O
stores	O
and	O
consumers	O
to	O
purchase	O
.	O
</s>
<s>
It	O
turned	O
towards	O
the	O
home	O
computer	O
market	O
for	O
inspiration	O
;	O
Nintendo	O
specifically	O
looked	O
to	O
floppy	B-Device
disks	I-Device
which	O
were	O
quickly	O
becoming	O
the	O
standard	O
for	O
storage	O
media	O
for	O
personal	O
computers	O
.	O
</s>
<s>
Floppy	B-Device
disks	I-Device
were	O
cheap	O
to	O
produce	O
and	O
rewritable	O
,	O
allowing	O
games	O
to	O
be	O
easily	O
produced	O
during	O
the	O
manufacturing	O
process	O
.	O
</s>
<s>
For	O
its	O
proprietary	O
diskette	B-Device
platform	O
,	O
which	O
they	O
dubbed	O
the	O
"	O
Disk	O
Card	O
"	O
,	O
Nintendo	O
chose	O
to	O
base	O
it	O
on	O
Mitsumi	O
's	O
Quick	O
Disk	O
media	O
format	O
,	O
a	O
cheaper	O
alternative	O
to	O
floppy	B-Device
disks	I-Device
for	O
Japanese	O
home	O
computers	O
.	O
</s>
<s>
The	O
Disk	O
Card	O
format	O
presented	O
a	O
number	O
of	O
advantages	O
over	O
cartridges	B-Protocol
,	O
such	O
as	O
increased	O
storage	O
capacity	O
that	O
allowed	O
for	O
larger	O
games	O
,	O
additional	O
sound	O
channels	O
,	O
and	O
the	O
ability	O
to	O
save	O
player	O
progress	O
.	O
</s>
<s>
Following	O
several	O
delays	O
,	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
was	O
released	O
on	O
February	O
21	O
,	O
1986	O
,	O
at	O
a	O
retail	O
price	O
of	O
¥15000	O
(	O
US$80	O
)	O
.	O
</s>
<s>
The	O
same	O
day	O
,	O
Nintendo	O
released	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
as	O
a	O
launch	O
title	O
,	O
alongside	O
disk	O
re-releases	O
of	O
earlier	O
Famicom	O
games	O
.	O
</s>
<s>
Marketing	O
material	O
for	O
the	O
Disk	B-Device
System	I-Device
featured	O
a	O
yellow	O
mascot	O
character	O
named	O
Diskun	O
,	O
or	O
Mr.	O
</s>
<s>
The	O
Famicom	B-Device
Disk	I-Device
System	I-Device
sold	O
over	O
300,000	O
units	O
within	O
three	O
months	O
,	O
jumping	O
to	O
over	O
2million	O
by	O
the	O
end	O
of	O
the	O
year	O
.	O
</s>
<s>
Nintendo	O
remained	O
confident	O
the	O
Disk	B-Device
System	I-Device
would	O
be	O
a	O
sure-fire	O
success	O
,	O
and	O
ensured	O
that	O
all	O
future	O
first-party	O
releases	O
would	O
be	O
exclusive	O
to	O
the	O
peripheral	O
.	O
</s>
<s>
Coinciding	O
with	O
the	O
Disk	B-Device
System	I-Device
's	O
release	O
,	O
Nintendo	O
installed	O
several	O
"	O
Disk	O
Writer	O
"	O
kiosks	O
in	O
various	O
toy	O
and	O
electronic	O
stores	O
across	O
the	O
country	O
.	O
</s>
<s>
Nintendo	O
also	O
introduced	O
special	O
high-score	O
tournaments	O
for	O
specific	O
Disk	B-Device
System	I-Device
games	O
,	O
where	O
players	O
could	O
submit	O
their	O
scores	O
directly	O
to	O
Nintendo	O
via	O
"	O
Disk	O
Fax	O
"	O
machines	O
found	O
in	O
retail	O
stores	O
.	O
</s>
<s>
Winners	O
would	O
receive	O
exclusive	O
prizes	O
,	O
including	O
Famicom-branded	O
stationary	O
sets	O
and	O
a	O
gold-colored	O
Punch-Out	B-Application
!!	I-Application
</s>
<s>
cartridge	B-Protocol
.	O
</s>
<s>
Nintendo	O
of	O
America	O
announced	O
plans	O
to	O
release	O
the	O
Disk	B-Device
System	I-Device
for	O
the	O
Famicom	O
's	O
international	O
counterpart	O
,	O
the	O
Nintendo	O
Entertainment	O
System	O
,	O
however	O
these	O
plans	O
were	O
eventually	O
scrapped	O
.	O
</s>
<s>
Despite	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
's	O
success	O
and	O
advantages	O
over	O
the	O
Famicom	O
itself	O
,	O
it	O
also	O
imposed	O
many	O
problems	O
of	O
its	O
own	O
.	O
</s>
<s>
Most	O
common	O
was	O
the	O
quality	O
of	O
the	O
Disk	O
Cards	O
;	O
Nintendo	O
removed	O
the	O
shutters	O
on	O
most	O
Disk	B-Device
System	I-Device
games	O
to	O
reduce	O
costs	O
,	O
instead	O
placing	O
them	O
in	O
a	O
wax	O
sleeve	O
and	O
clear	O
plastic	O
shell	O
.	O
</s>
<s>
Third-party	O
developers	O
for	O
the	O
Disk	B-Device
System	I-Device
were	O
also	O
angered	O
towards	O
Nintendo	O
's	O
strict	O
licensing	O
terms	O
,	O
requiring	O
that	O
it	O
receive	O
50%	O
copyright	O
ownership	O
of	O
any	O
and	O
all	O
software	O
released	O
—	O
this	O
led	O
to	O
several	O
major	O
developers	O
,	O
such	O
as	O
Namco	O
and	O
Hudson	O
Soft	O
,	O
refusing	O
to	O
produce	O
games	O
for	O
it	O
.	O
</s>
<s>
Four	O
months	O
after	O
the	O
Disk	B-Device
System	I-Device
was	O
released	O
,	O
Capcom	O
released	O
a	O
Famicom	O
conversion	O
of	O
Ghosts	B-Application
'	I-Application
n	I-Application
Goblins	I-Application
on	O
a	O
128k	O
cartridge	B-Protocol
-	O
larger	O
than	O
the	O
Disk	O
Card	O
's	O
112k	O
capacity	O
-	O
which	O
,	O
as	O
a	O
result	O
,	O
made	O
consumers	O
and	O
developers	O
less	O
impressed	O
with	O
the	O
Disk	B-Device
System	I-Device
's	O
technological	O
features	O
.	O
</s>
<s>
The	O
Disk	B-Device
System	I-Device
's	O
vague	O
error	O
messages	O
,	O
long	O
loading	O
times	O
,	O
and	O
the	O
poor	O
quality	O
of	O
the	O
rubber	O
drive	O
belt	O
that	O
spun	O
the	O
disks	O
are	O
also	O
cited	O
as	O
attributing	O
to	O
its	O
downfall	O
.	O
</s>
<s>
By	O
1989	O
,	O
advancements	O
in	O
technology	O
made	O
cartridge	B-Protocol
games	O
much	O
cheaper	O
and	O
easier	O
to	O
produce	O
,	O
leaving	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
obsolete	O
.	O
</s>
<s>
Retailers	O
were	O
critical	O
of	O
Nintendo	O
simply	O
abandoning	O
the	O
Disk	O
Writers	O
and	O
leaving	O
stores	O
with	O
large	O
kiosks	O
that	O
took	O
up	O
vital	O
space	O
,	O
while	O
companies	O
began	O
to	O
release	O
or	O
move	O
their	O
games	O
from	O
the	O
Disk	B-Device
System	I-Device
to	O
a	O
standard	O
cartridge	B-Protocol
;	O
towards	O
the	O
end	O
of	O
development	O
,	O
Squaresoft	O
ported	O
Final	B-Application
Fantasy	I-Application
over	O
to	O
the	O
Famicom	O
as	O
a	O
cartridge	B-Protocol
game	O
,	O
with	O
its	O
own	O
battery	O
backup	O
save	O
feature	O
.	O
</s>
<s>
Nintendo	O
officially	O
discontinued	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
in	O
1990	O
,	O
selling	O
around	O
4.4million	O
units	O
total	O
.	O
</s>
<s>
Sharp	O
released	O
the	O
Twin	B-Device
Famicom	I-Device
,	O
a	O
Famicom	O
model	O
that	O
features	O
a	O
built-in	O
Disk	B-Device
System	I-Device
.	O
</s>
<s>
In	O
1986	O
,	O
as	O
video	O
gaming	O
had	O
increasingly	O
expanded	O
from	O
computers	O
into	O
the	O
video	B-Application
game	I-Application
console	I-Application
market	O
,	O
Nintendo	O
advertised	O
a	O
promise	O
to	O
install	O
10,000	O
Famicom	O
Disk	O
Writer	O
kiosks	O
in	O
toy	O
and	O
hobby	O
stores	O
across	O
Japan	O
within	O
one	O
year	O
.	O
</s>
<s>
Players	O
could	O
take	O
advantage	O
of	O
the	O
dynamic	O
rewritability	O
of	O
blue	O
floppy	B-Device
disk	I-Device
versions	O
of	O
Disk	B-Device
System	I-Device
games	O
(	O
such	O
as	O
Famicom	O
Grand	O
Prix	O
:	O
F1	O
Race	O
and	O
Golf	O
Japan	O
Course	O
)	O
in	O
order	O
to	O
save	O
their	O
high	O
scores	O
at	O
their	O
leisure	O
at	O
home	O
,	O
and	O
then	O
bring	O
the	O
disk	O
to	O
a	O
retailer	O
's	O
Disk	O
Fax	O
kiosk	O
,	O
which	O
collated	O
and	O
transmitted	O
the	O
players	O
 '	O
scores	O
via	O
fax	O
to	O
Nintendo	O
.	O
</s>
<s>
In	O
subsequent	O
console	O
generations	O
,	O
Nintendo	O
would	O
relaunch	O
this	O
online	O
national	O
leaderboard	O
concept	O
with	O
the	O
home	O
satellite-based	O
Satellaview	B-Device
subscription	O
service	O
in	O
Japan	O
from	O
1995-2000	O
for	O
the	O
Super	B-Application
Famicom	I-Application
.	O
</s>
<s>
It	O
would	O
relaunch	O
the	O
model	O
of	O
games	O
downloadable	O
to	O
rewritable	O
portable	O
media	O
from	O
store	O
kiosks	O
,	O
with	O
the	O
Nintendo	B-Application
Power	I-Application
service	O
in	O
Japan	O
which	O
is	O
based	O
on	O
rewritable	O
flash	O
media	O
cartridges	B-Protocol
for	O
the	O
Super	B-Application
Famicom	I-Application
and	O
Game	B-Device
Boy	I-Device
from	O
1997	O
–	O
2007	O
.	O
</s>
<s>
NintendoLife	O
said	O
it	O
"	O
was	O
truly	O
ground-breaking	O
for	O
its	O
time	O
and	O
could	O
be	O
considered	O
a	O
forerunner	O
of	O
more	O
modern	O
distribution	O
methods	O
[	O
such	O
as ]	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
,	O
PlayStation	B-Device
Network	I-Device
,	O
and	O
Steam	B-Application
"	O
.	O
</s>
<s>
The	O
device	O
is	O
connected	O
to	O
the	O
Famicom	O
console	O
by	O
plugging	O
its	O
RAM	B-Architecture
Adapter	O
cartridge	B-Protocol
into	O
the	O
system	O
's	O
cartridge	B-Protocol
port	O
,	O
and	O
attaching	O
that	O
cartridge	B-Protocol
's	O
cable	O
to	O
the	O
disk	O
drive	O
.	O
</s>
<s>
The	O
RAM	B-Architecture
Adapter	O
contains	O
32kilobytes	O
(	O
KB	O
)	O
of	O
RAM	B-Architecture
for	O
temporarily	O
caching	O
program	O
data	O
from	O
disk	O
,	O
8KB	O
of	O
RAM	B-Architecture
for	O
tile	O
and	O
sprite	O
data	O
storage	O
,	O
and	O
an	O
ASIC	O
named	O
the	O
2C33	O
.	O
</s>
<s>
The	O
ASIC	O
acts	O
as	O
a	O
disk	B-General_Concept
controller	I-General_Concept
,	O
plus	O
single-cycle	O
wavetable-lookup	O
synthesizer	O
sound	O
hardware	O
.	O
</s>
<s>
The	O
Disk	B-Device
System	I-Device
is	O
capable	O
of	O
running	O
on	O
six	O
C-cell	O
batteries	O
or	O
the	O
supplied	O
AC	O
adapter	O
.	O
</s>
<s>
The	O
Disk	B-Device
System	I-Device
's	O
Disk	O
Cards	O
are	O
somewhat	O
proprietary	O
71mm	O
×	O
76mm	O
(	O
2.8	O
×	O
3	O
in	O
)	O
56K-per-side	O
double-sided	O
floppy	B-Device
.	O
</s>
<s>
In	O
addition	O
to	O
branding	O
the	O
disk	O
,	O
this	O
acts	O
as	O
a	O
rudimentary	O
form	O
of	O
copy	B-Application
protection	I-Application
-	O
a	O
device	O
inside	O
the	O
drive	O
bay	O
contains	O
raised	O
protrusions	O
which	O
fit	O
into	O
their	O
recessed	O
counterparts	O
,	O
ostensibly	O
ensuring	O
that	O
only	O
official	O
disks	O
are	O
used	O
.	O
</s>
<s>
An	O
advertisement	O
containing	O
a	O
guide	O
for	O
a	O
simple	O
modification	O
to	O
a	O
Quick	O
Disk	O
to	O
allow	O
its	O
use	O
with	O
a	O
Famicom	B-Device
Disk	I-Device
System	I-Device
was	O
printed	O
in	O
at	O
least	O
one	O
magazine	O
.	O
</s>
<s>
There	O
are	O
about	O
200	O
games	O
in	O
the	O
Famicom	B-Device
Disk	I-Device
System	I-Device
's	O
library	O
.	O
</s>
<s>
Some	O
are	O
FDS	O
exclusives	O
,	O
some	O
are	O
Disk	O
Writer	O
exclusives	O
,	O
and	O
many	O
were	O
re-released	O
years	O
later	O
on	O
the	O
cartridge	B-Protocol
format	O
such	O
as	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
for	O
NES	O
in	O
1987	O
and	O
for	O
Famicom	O
in	O
1994	O
.	O
</s>
<s>
The	O
most	O
notable	O
FDS	O
originals	O
include	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
,	O
Zelda	B-Application
II	I-Application
:	I-Application
The	I-Application
Adventure	I-Application
of	I-Application
Link	I-Application
,	O
Kid	B-Application
Icarus	I-Application
,	O
Metroid	B-Device
,	O
and	O
Akumajō	O
Dracula	O
(	O
Castlevania	B-Application
)	O
.	O
</s>
<s>
Square	O
Co.	O
,	O
Ltd	O
.	O
had	O
a	O
branch	O
called	O
Disk	O
Original	O
Group	O
,	O
a	O
software	O
label	O
that	O
published	O
Disk	B-Device
System	I-Device
games	O
from	O
Japanese	O
PC	O
software	O
companies	O
.	O
</s>
<s>
Final	B-Application
Fantasy	I-Application
was	O
to	O
be	O
released	O
for	O
the	O
FDS	O
,	O
but	O
a	O
disagreement	O
over	O
Nintendo	O
's	O
copyright	O
policies	O
caused	O
Square	O
to	O
change	O
its	O
position	O
and	O
release	O
the	O
game	O
as	O
a	O
cartridge	B-Protocol
.	O
</s>
<s>
Nintendo	O
released	O
a	O
disk	O
version	O
of	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
in	O
addition	O
to	O
the	O
cartridge	B-Protocol
version	O
.	O
</s>
<s>
The	O
Western-market	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
2	I-Application
originated	O
from	O
a	O
disk-only	O
game	O
called	O
Yume	O
Kōjō	O
:	O
Doki	O
Doki	O
Panic	O
.	O
</s>
<s>
Nintendo	O
utilized	O
the	O
cheaper	O
and	O
more	O
dynamic	O
disk	O
medium	O
for	O
a	O
Disk	O
Writer	O
exclusive	O
,	O
as	O
an	O
early	O
advergame	B-Application
.	O
</s>
<s>
Kaettekita	O
Mario	B-Application
Bros	I-Application
.	I-Application
(	O
lit	O
.	O
</s>
<s>
The	O
Return	O
of	O
Mario	B-Application
Bros	I-Application
.	I-Application
)	O
is	O
a	O
remastered	O
version	O
of	O
Mario	B-Application
Bros	I-Application
.	I-Application
with	O
enhanced	O
jump	O
controls	O
and	O
high	O
score	O
saving	O
,	O
plus	O
a	O
new	O
slot	O
machine	O
minigame	O
co-branded	O
for	O
the	O
Nagatanien	O
food	O
company	O
.	O
</s>
<s>
The	O
final	O
FDS	O
game	O
release	O
was	O
Janken	O
Disk	O
Jō	O
in	O
December	O
1992	O
,	O
a	O
rock	O
paper	O
scissors	O
game	O
featuring	O
the	O
Disk	B-Device
System	I-Device
mascot	O
,	O
Disk-kun	O
.	O
</s>
<s>
The	O
Famicom	B-Device
Disk	I-Device
System	I-Device
briefly	O
served	O
as	O
an	O
enabling	O
technology	O
for	O
the	O
creation	O
of	O
a	O
new	O
wave	O
of	O
home	B-Device
console	I-Device
video	O
games	O
and	O
a	O
new	O
type	O
of	O
video	O
game	O
experience	O
,	O
mostly	O
due	O
to	O
tripling	O
the	O
size	O
of	O
cheap	O
game	O
storage	O
compared	O
to	O
affordable	O
cartridge	B-Protocol
ROMs	O
,	O
and	O
by	O
storing	O
gamers	O
 '	O
progress	O
within	O
their	O
vast	O
new	O
adventures	O
.	O
</s>
<s>
These	O
games	O
include	O
the	O
open	O
world	O
design	O
and	O
enduring	O
series	O
launches	O
of	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
(	O
1986	O
)	O
and	O
Metroid	B-Device
(	O
1986	O
)	O
,	O
with	O
its	O
launch	O
game	O
Zelda	O
becoming	O
very	O
popular	O
and	O
leading	O
to	O
sequels	O
which	O
are	O
considered	O
some	O
of	O
the	O
greatest	O
games	O
of	O
all	O
time	O
.	O
</s>
<s>
Almost	O
one	O
decade	O
ahead	O
of	O
Nintendo	O
's	O
Satellaview	B-Device
service	O
,	O
the	O
FDS	O
's	O
writable	O
and	O
portable	O
storage	O
technology	O
served	O
as	O
an	O
enabling	O
technology	O
for	O
the	O
innovation	O
of	O
online	O
leaderboards	O
and	O
contests	O
via	O
the	O
in-store	O
Disk	O
Fax	O
kiosks	O
,	O
which	O
are	O
now	O
seen	O
as	O
the	O
earliest	O
forerunners	O
of	O
modern	O
online	B-Application
gaming	I-Application
and	O
distribution	O
.	O
</s>
<s>
Within	O
its	O
library	O
of	O
200	O
original	O
games	O
,	O
some	O
are	O
FDS-exclusive	O
and	O
many	O
were	O
re-released	O
one	O
or	O
two	O
years	O
later	O
on	O
cartridges	B-Protocol
for	O
Famicom	O
and	O
NES	O
,	O
though	O
without	O
the	O
FDS	O
's	O
additional	O
sound	O
channel	O
.	O
</s>
