<s>
The	O
C-One	B-Device
is	O
a	O
single-board	B-Device
computer	I-Device
(	O
SBC	O
)	O
created	O
in	O
2002	O
as	O
an	O
enhanced	O
version	O
of	O
the	O
Commodore	O
64	O
,	O
a	O
home	O
computer	O
popular	O
in	O
the	O
1980s	O
.	O
</s>
<s>
Designed	O
by	O
Jeri	O
Ellsworth	O
and	O
Jens	O
Schönfeld	O
from	O
Individual	O
Computers	O
,	O
who	O
manufactured	O
the	O
boards	O
themselves	O
,	O
the	O
C-One	B-Device
has	O
been	O
re-engineered	O
to	O
allow	O
cloning	O
of	O
other	O
8-bit	O
computers	O
.	O
</s>
<s>
The	O
machine	O
uses	O
a	O
combination	O
of	O
configurable	O
Altera	O
field-programmable	B-Architecture
gate	I-Architecture
array	I-Architecture
(	O
FPGA	B-Architecture
)	O
chips	O
and	O
modular	O
CPU	B-General_Concept
expansion	O
cards	O
to	O
create	O
compatibility	O
modes	O
that	O
duplicate	O
the	O
function	O
of	O
many	O
older	O
home	O
computers	O
.	O
</s>
<s>
The	O
default	O
CPU	B-General_Concept
is	O
the	O
W65C816S	B-General_Concept
(	O
by	O
Western	O
Design	O
Center	O
)	O
which	O
is	O
used	O
in	O
Commodore	O
64	O
compatibility	O
mode	O
as	O
well	O
as	O
the	O
C-One	B-Device
'	O
s	O
native	O
operating	O
mode	O
.	O
</s>
<s>
The	O
C-One	B-Device
is	O
not	O
merely	O
a	O
software	B-Application
emulator	I-Application
,	O
it	O
loads	O
various	O
core	O
files	O
from	O
a	O
card	O
to	O
configure	O
the	O
FPGA	B-Architecture
hardware	O
to	O
recreate	O
the	O
operation	O
of	O
the	O
core	B-Device
logic	I-Device
chipsets	I-Device
found	O
in	O
vintage	O
computers	O
.	O
</s>
<s>
This	O
provides	O
for	O
a	O
very	O
accurate	O
and	O
customizable	O
hardware	O
emulation	B-Application
platform	O
.	O
</s>
<s>
The	O
C-One	B-Device
is	O
not	O
limited	O
to	O
recreating	O
historical	O
computers	O
:	O
its	O
programmable	O
core	O
logic	O
can	O
be	O
used	O
to	O
create	O
entirely	O
new	O
custom	O
computer	O
designs	O
.	O
</s>
<s>
In	O
2004	O
,	O
the	O
platform	O
was	O
expanded	O
to	O
include	O
an	O
Amstrad	B-Device
CPC	I-Device
core	O
made	O
by	O
Tobias	O
Gubener	O
.	O
</s>
<s>
In	O
2006	O
,	O
Peter	O
Wendrich	O
ported	O
his	O
FPGA-64	O
project	O
(	O
originally	O
intended	O
for	O
a	O
Xilinx	O
FPGA	B-Architecture
)	O
and	O
enhanced	O
it	O
for	O
the	O
C-One	B-Device
.	O
</s>
<s>
This	O
core	O
supported	O
both	O
PAL	O
and	O
NTSC	O
machine	O
emulation	B-Application
,	O
and	O
aimed	O
to	O
be	O
cycle-exact	O
and	O
emulate	O
many	O
of	O
the	O
bugs	O
and	O
quirks	O
of	O
the	O
original	O
hardware	O
.	O
</s>
<s>
In	O
2008	O
,	O
after	O
development	O
of	O
an	O
"	O
Extender	O
"	O
card	O
which	O
added	O
a	O
third	O
FPGA	B-Architecture
,	O
Tobias	O
Gubener	O
added	O
Amiga	B-Device
500	I-Device
compatibility	O
by	O
porting	O
Dennis	O
van	O
Weeren	O
's	O
Minimig	O
code	O
to	O
the	O
board	O
.	O
</s>
<s>
This	O
core	O
replaced	O
the	O
physical	O
68000	O
CPU	B-General_Concept
and	O
the	O
PIC	O
chip	O
from	O
the	O
original	O
with	O
his	O
own	O
TG68	O
CPU	B-General_Concept
core	O
on	O
the	O
FPGA	B-Architecture
.	O
</s>
<s>
A	O
new	O
version	O
of	O
the	O
CPC	O
core	O
was	O
also	O
released	O
in	O
mid-2009	O
,	O
featuring	O
an	O
embedded	O
SymbOS	O
core	O
for	O
control	O
of	O
device	O
emulation	B-Application
,	O
and	O
a	O
clock	O
unlocked	O
mode	O
for	O
CPU	B-General_Concept
speeds	O
of	O
up	O
to	O
80MHz	O
.	O
</s>
<s>
So	O
far	O
,	O
C-One	B-Device
circuit	O
boards	O
have	O
been	O
produced	O
by	O
German	O
company	O
Individual	O
Computers	O
,	O
and	O
they	O
sell	O
for	O
€333	O
with	O
the	O
FPGA	B-Architecture
extender	O
card	O
.	O
</s>
