<s>
Stella	B-Application
is	O
an	O
emulator	O
of	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
game	O
console	O
,	O
and	O
takes	O
its	O
name	O
from	O
the	O
console	O
's	O
codename	O
.	O
</s>
<s>
It	O
is	O
open-source	B-Application
,	O
and	O
runs	O
on	O
most	O
major	O
modern	O
platforms	O
including	O
Windows	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
Stella	B-Application
was	O
originally	O
written	O
in	O
1996	O
(	O
and	O
known	O
as	O
Stella	B-Application
96	O
)	O
by	O
Bradford	O
W	O
.	O
Mott	O
,	O
and	O
is	O
now	O
maintained	O
by	O
Stephen	O
Anthony	O
.	O
</s>
<s>
Stella	B-Application
is	O
written	O
in	O
the	O
C++	B-Language
programming	I-Language
language	I-Language
and	O
thus	O
is	O
highly	O
portable	O
.	O
</s>
<s>
The	O
emulator	O
supports	O
all	O
Atari	B-General_Concept
2600	I-General_Concept
cartridge	O
bank	B-General_Concept
switching	I-General_Concept
schemes	O
and	O
has	O
support	O
for	O
nearly	O
all	O
Atari	B-General_Concept
2600	I-General_Concept
titles	O
.	O
</s>
<s>
It	O
has	O
cycle-exact	O
emulation	O
for	O
the	O
TIA	O
chip	O
(	O
graphics	O
and	O
sound	O
)	O
;	O
the	O
Stella	B-Application
Team	O
estimates	O
that	O
current	O
TIA	O
emulation	O
is	O
nearing	O
100%	O
completion	O
.	O
</s>
<s>
Stella	B-Application
emulates	O
most	O
Atari	B-General_Concept
2600	I-General_Concept
peripheral	O
devices	O
,	O
including	O
standard	O
joysticks	B-Device
,	O
paddle	B-Device
controllers	I-Device
,	O
the	O
Atari	O
Video	O
Touch	O
Pad	O
,	O
the	O
Atari	O
Keyboard	O
Controller	O
,	O
Atari	O
Indy	O
500	O
Driving	O
Controllers	O
,	O
the	O
CBS	O
Booster-Grip	O
controller	O
,	O
the	O
Atari	O
TrakBall/AtariMouse/AmigaMouse	O
trackball	B-Device
controllers	O
,	O
the	O
Sega	B-Operating_System
Genesis	I-Operating_System
controller	O
,	O
and	O
the	O
AtariVox	O
and	O
SaveKey	O
controllers	O
.	O
</s>
<s>
Stelladaptor	O
and	O
2600-daptor	O
support	O
allows	O
real	O
joysticks	B-Device
,	O
paddles	B-Device
,	O
and	O
driving	O
controllers	O
to	O
be	O
used	O
,	O
and	O
support	O
is	O
also	O
included	O
to	O
access	O
a	O
real	O
AtariVox	O
device	O
plugged	O
into	O
a	O
serial	O
port	O
(	O
and	O
actually	O
generate	O
sound	O
from	O
the	O
AtariVox	O
device	O
)	O
.	O
</s>
<s>
Stella	B-Application
does	O
not	O
yet	O
support	O
the	O
cassette-based	O
titles	O
designed	O
to	O
work	O
with	O
the	O
Coleco	O
KidVid	O
cassette	B-Device
player	O
but	O
does	O
have	O
support	O
for	O
titles	O
designed	O
to	O
work	O
with	O
the	O
Starpath	O
Supercharger	O
and	O
Spectravideo	B-Language
Compumate	I-Language
.	O
</s>
<s>
Stella	B-Application
includes	O
many	O
facilities	O
for	O
homebrew	B-Application
developers	O
,	O
including	O
an	O
extensive	O
built-in	O
interactive	O
debugger	B-Application
and	O
disassembler	O
supporting	O
breakpoints	O
,	O
read/write	O
traps	O
,	O
etc	O
.	O
</s>
<s>
Stella	B-Application
uses	O
the	O
TIA	O
emulation	O
core	O
from	O
,	O
a	O
collection	O
of	O
emulators	O
for	O
MOS	O
6502	O
based	O
systems	O
written	O
in	O
TypeScript	O
and	O
runnable	O
from	O
a	O
web	O
page	O
.	O
</s>
