<s>
The	O
Xbox	B-Application
Development	I-Application
Kit	I-Application
(	O
XDK	O
)	O
is	O
a	O
software	B-Application
development	I-Application
kit	I-Application
created	O
by	O
Microsoft	O
used	O
to	O
write	O
software	O
for	O
the	O
Xbox	B-Application
gaming	O
system	O
.	O
</s>
<s>
The	O
XDK	O
includes	O
libraries	B-Library
,	O
a	O
compiler	B-Language
,	O
and	O
various	O
tools	O
used	O
to	O
create	O
software	O
for	O
the	O
Xbox	B-Application
.	O
</s>
<s>
The	O
XDK	O
has	O
the	O
option	O
to	O
integrate	O
itself	O
into	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
2002	O
or	O
2003	O
.	O
</s>
<s>
This	O
is	O
needed	O
if	O
one	O
wants	O
to	O
develop	O
applications	O
or	O
games	O
for	O
the	O
Xbox	B-Application
.	O
</s>
<s>
The	O
XDK	O
allows	O
software	O
creators	O
to	O
create	O
,	O
run	O
and	O
distribute	O
applications	O
on	O
the	O
Xbox	B-Application
platform	O
.	O
</s>
<s>
Xbox	B-Application
360	O
XDKs	O
were	O
based	O
on	O
all	O
three	O
generations	O
of	O
the	O
Xbox	B-Application
360	O
Design	O
(	O
"	O
Phat	O
"	O
,	O
"	O
Slim	O
"	O
and	O
"	O
E	O
"	O
)	O
.	O
</s>
<s>
XNA	O
Kits	O
(	O
Were	O
used	O
at	O
some	O
expos	O
and	O
given	O
to	O
game	O
studios	O
)	O
,	O
Stress	O
Kits	O
(	O
Used	O
to	O
test	O
the	O
power	O
of	O
the	O
Xbox	B-Application
360	O
and	O
various	O
conditions	O
such	O
as	O
undervolting	O
and	O
overvolting	O
and	O
issued	O
to	O
Microsoft	O
developers	O
only	O
)	O
,	O
and	O
Demo	O
kits	O
(	O
Used	O
to	O
demo	O
games	O
)	O
.	O
</s>
<s>
Some	O
,	O
but	O
not	O
all	O
,	O
XDKs	O
include	O
a	O
sidecar	O
which	O
was	O
used	O
to	O
emulate	O
the	O
DVD	O
drive	O
and	O
act	O
as	O
a	O
hard	B-Device
drive	I-Device
and	O
on	O
older	O
XDKs	O
with	O
older	O
recoveries	O
,	O
used	O
for	O
PIX	O
Debugging	O
.	O
</s>
<s>
Bundled	O
with	O
XDKs	O
is	O
the	O
Xbox	B-Application
360	O
SDK	O
used	O
to	O
connect	O
to	O
the	O
console	O
,	O
enable	O
memory	O
editing	O
,	O
file	O
management	O
,	O
and	O
integrate	O
to	O
Visual	B-Application
Studio	I-Application
2010	O
for	O
Xbox	B-Application
360	O
game	O
development	O
.	O
</s>
<s>
The	O
Xbox	B-Application
BIOS	B-Operating_System
is	O
based	O
on	O
the	O
NT	B-Application
5.0	I-Application
kernel	O
,	O
but	O
does	O
not	O
have	O
all	O
of	O
the	O
resources	O
or	O
capabilities	O
of	O
the	O
Windows	B-Application
2000	I-Application
operating	O
system	O
,	O
(	O
for	O
example	O
:	O
neither	O
DirectShow	B-Library
,	O
registry	B-Protocol
,	O
or	O
DLL	O
are	O
natively	O
supported	O
on	O
the	O
Xbox	B-Application
)	O
.	O
</s>
<s>
Because	O
of	O
the	O
constraints	O
on	O
the	O
hardware	O
and	O
environment	O
of	O
the	O
Xbox	B-Application
,	O
all	O
software	O
development	O
for	O
the	O
Xbox	B-Application
(	O
and	O
all	O
video	O
game	O
consoles	O
systems	O
in	O
general	O
)	O
are	O
focused	O
on	O
reserving	O
the	O
limited	O
resources	O
that	O
exist	O
,	O
the	O
main	O
limitation	O
of	O
which	O
is	O
the	O
amount	O
of	O
available	O
RAM	B-Architecture
.	O
</s>
<s>
The	O
Xbox	B-Application
Software	B-Application
Development	I-Application
Kit	I-Application
(	O
SDK	O
)	O
(	O
with	O
libraries	B-Library
)	O
is	O
required	O
to	O
compile	B-Language
video	O
games	O
and	O
applications	O
for	O
the	O
Xbox	B-Application
.	O
</s>
<s>
Also	O
required	O
to	O
compile	B-Language
(	O
and	O
program	B-Application
in	O
)	O
is	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
.NET	I-Application
.	O
</s>
<s>
The	O
Xbox	B-Application
does	O
not	O
have	O
an	O
operating	O
system	O
per	O
se	O
,	O
instead	O
it	O
only	O
has	O
a	O
simple	O
BIOS	B-Operating_System
.	O
</s>
<s>
Everything	O
else	O
must	O
go	O
into	O
the	O
main	O
executable	B-Application
and	O
its	O
(	O
XDK	O
and	O
own-made	O
)	O
libraries	B-Library
.	O
</s>
<s>
Only	O
a	O
single	O
process	B-Operating_System
(	O
executable	B-Application
program	I-Application
)	O
can	O
run	O
at	O
a	O
time	O
on	O
the	O
Xbox	B-Application
.	O
</s>
<s>
Xbox	B-Application
hard	B-Device
drive	I-Device
file	O
system	O
(	O
FATX	O
)	O
has	O
many	O
limitations	O
,	O
among	O
them	O
a	O
maximum	O
file	O
name	O
length	O
of	O
42	O
characters	O
.	O
</s>
<s>
The	O
Xbox	B-Application
has	O
four	O
non-standard	O
USB	B-Protocol
ports	O
but	O
the	O
Xbox	B-Application
SDK	O
does	O
not	O
contain	O
a	O
full	O
USB	B-Protocol
stack	B-Application
,	O
thus	O
to	O
add	O
support	O
for	O
USB	B-Protocol
hardware	O
devices	O
,	O
the	O
developer	O
would	O
have	O
to	O
code	O
the	O
entire	O
USB	B-Protocol
stack	B-Application
from	O
scratch	O
.	O
</s>
<s>
This	O
is	O
a	O
list	O
of	O
XDK	O
,	O
Xbox	B-Application
hardware	O
,	O
and	O
Xbox	B-Application
operating	O
system	O
specific	O
limitations	O
.	O
</s>
<s>
UDF	O
(	O
Universal	O
Disk	O
Format	O
)	O
file	O
system	O
limitation	O
:	O
The	O
Xbox	B-Application
only	O
supports	O
UDF	O
version	O
1.02	O
(	O
designed	O
for	O
DVD-Video	O
)	O
,	O
which	O
has	O
a	O
maximum	O
file	O
size	O
of	O
1GB	O
(	O
Gigabyte	O
)	O
(	O
a	O
DVD	O
in	O
a	O
newer	O
UDF	O
version	O
with	O
a	O
video	O
that	O
is	O
larger	O
than	O
1GB	O
will	O
not	O
play	O
)	O
,	O
with	O
the	O
same	O
applying	O
to	O
UDF/ISO	O
hybrid	O
formats	O
(	O
a.k.a.	O
</s>
<s>
A	O
workaround	O
is	O
to	O
burn	O
discs	O
in	O
the	O
ISO	B-Application
9660	I-Application
format	O
.	O
</s>
<s>
The	O
ISO	B-Application
9660	I-Application
format	O
has	O
a	O
2GB	O
maximum	O
file	O
size	O
,	O
which	O
cannot	O
be	O
bypassed	O
.	O
</s>
<s>
The	O
Xbox	B-Application
hard	B-Device
disk	I-Device
is	O
formatted	O
in	O
FATX	O
(	O
File	O
Allocation	O
Table	O
for	O
Xbox	B-Application
)	O
which	O
has	O
a	O
4GB	O
(	O
4096	O
Megabyte	O
)	O
maximum	O
file	O
size	O
,	O
and	O
only	O
supports	O
file/folder	O
names	O
up	O
to	O
42	O
characters	O
,	O
a	O
maximum	O
of	O
255	O
character	O
full	O
path	O
,	O
and	O
a	O
maximum	O
number	O
of	O
4096	O
files/folders	O
in	O
a	O
single	O
folder	O
,	O
plus	O
in	O
the	O
root	O
of	O
each	O
partition	O
,	O
the	O
maximum	O
number	O
of	O
files/folders	O
is	O
256	O
.	O
</s>
<s>
FATX	O
also	O
does	O
not	O
support	O
all	O
standard	O
ASCII	B-Protocol
characters	I-Protocol
in	O
file/folder	O
names	O
(	O
for	O
example	O
< >	O
=	O
?	O
</s>
<s>
The	O
USB	B-Protocol
flash	O
drive	O
reader/writer	O
class	O
used	O
by	O
the	O
Xbox	B-Application
operating	O
system	O
has	O
a	O
few	O
limitations	O
as	O
well	O
.	O
</s>
<s>
It	O
is	O
limited	O
to	O
USB	B-Protocol
flash	O
drives	O
and	O
hard	B-Device
disks	I-Device
compatible	O
with	O
USB	B-Architecture
Mass	I-Architecture
Storage	I-Architecture
Device	I-Architecture
Class	I-Architecture
following	O
the	O
USB	B-Protocol
1.1	O
standard	O
,	O
with	O
a	O
maximum	O
size	O
of	O
4GB	O
.	O
</s>
<s>
NTFS	B-Application
formatted	O
drives	O
are	O
not	O
supported	O
yet	O
.	O
</s>
<s>
With	O
its	O
733MHz	O
Intel	O
Pentium	O
III-like	O
CPU	B-Device
and	O
64MB	O
shared	B-Operating_System
memory	I-Operating_System
,	O
the	O
Xbox	B-Application
has	O
neither	O
a	O
fast	O
enough	O
CPU	B-Device
nor	O
sufficient	O
RAM	B-Architecture
to	O
play	O
HDTV	B-Device
videos	O
encoded	O
in	O
native	O
720p/1080i	O
resolution	O
.	O
</s>
<s>
However	O
,	O
the	O
Xbox	B-Application
can	O
upscale	O
all	O
standard	B-Device
definition	I-Device
movies	O
and	O
output	O
them	O
at	O
720p	O
or	O
1080i	O
.	O
</s>
