<s>
The	O
C64	B-Device
Direct-to-TV	I-Device
,	O
called	O
C64DTV	B-Device
for	O
short	O
,	O
is	O
a	O
single-chip	O
implementation	O
of	O
the	O
Commodore	O
64	O
computer	O
,	O
contained	O
in	O
a	O
joystick	B-Device
(	O
modeled	O
after	O
the	O
mid-1980s	O
Competition	O
Pro	O
joystick	B-Device
)	O
,	O
with	O
30	O
built-in	O
games	O
.	O
</s>
<s>
The	O
circuitry	O
of	O
the	O
C64DTV	B-Device
was	O
designed	O
by	O
Jeri	O
Ellsworth	O
,	O
a	O
computer	O
chip	O
designer	O
who	O
had	O
previously	O
designed	O
the	O
C-One	B-Device
.	O
</s>
<s>
There	O
exist	O
multiple	O
versions	O
of	O
the	O
C64DTV	B-Device
.	O
</s>
<s>
DTV1	O
(	O
NTSC	O
television	O
type	O
)	O
comes	O
with	O
2	O
MB	O
ROM	B-Device
.	O
</s>
<s>
DTV2	O
(	O
called	O
C64D2TV	O
sometimes	O
)	O
is	O
a	O
revised	O
version	O
for	O
the	O
European	O
and	O
world	O
markets	O
(	O
PAL	B-Language
television	O
type	O
)	O
and	O
appeared	O
in	O
late	O
2005	O
.	O
</s>
<s>
The	O
ROM	B-Device
has	O
been	O
replaced	O
by	O
flash	B-Device
memory	I-Device
in	O
these	O
devices	O
.	O
</s>
<s>
However	O
,	O
the	O
DTV2/PAL	O
version	O
suffers	O
from	O
a	O
manufacturing	O
fault	O
,	O
which	O
results	O
in	O
poor	O
colour	O
rendering	O
(	O
the	O
resistors	O
in	O
the	O
R-2R	O
ladder	O
DACs	O
for	O
both	O
the	O
chroma	O
and	O
the	O
luma	O
have	O
been	O
transposed	O
)	O
.	O
</s>
<s>
In	O
the	O
DTV3	O
,	O
a	O
problem	O
with	O
the	O
blitter	B-General_Concept
was	O
fixed	O
.	O
</s>
<s>
Games	O
unique	O
to	O
the	O
NTSC	O
or	O
PAL	B-Language
versions	O
are	O
noted	O
below	O
.	O
</s>
<s>
Since	O
the	O
internal	O
circuit	O
board	O
has	O
exposed	O
solder	O
points	O
for	O
floppy-drive	O
and	O
keyboard	O
ports	O
,	O
hardware	O
modifications	O
of	O
the	O
C64DTV	B-Device
are	O
relatively	O
simple	O
.	O
</s>
<s>
The	O
internal	O
flash	B-Device
memory	I-Device
is	O
accessible	O
as	O
device	O
1	O
.	O
</s>
<s>
People	O
made	O
their	O
own	O
game	O
compilations	O
,	O
adding	O
popular	O
(	O
sometimes	O
DTV-fixed	O
)	O
games	O
that	O
were	O
not	O
in	O
the	O
original	O
DTV	O
,	O
added	O
boot	O
menus	O
to	O
make	O
homebrew	O
software	O
development	O
easier	O
or	O
enable	O
new	O
features	O
,	O
for	O
example	O
transfer	O
programs	O
like	O
DTVtrans	O
for	O
transferring	O
data	O
from	O
PC	O
to	O
DTV	O
RAM	B-Architecture
and	O
vice	O
versa	O
via	O
the	O
PC	O
parallel	B-Device
port	I-Device
(	O
or	O
USB	O
)	O
and	O
the	O
DTV	O
joystick	B-Device
port	O
.	O
</s>
