<s>
The	O
PlayStation	B-Operating_System
Portable	I-Operating_System
system	I-Operating_System
software	I-Operating_System
is	O
the	O
official	O
firmware	B-Application
for	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
(	O
PSP	B-Operating_System
)	O
.	O
</s>
<s>
It	O
uses	O
the	O
XrossMediaBar	B-Device
(	O
XMB	B-Device
)	O
as	O
its	O
user	B-Application
interface	I-Application
,	O
similar	O
to	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
console	O
.	O
</s>
<s>
Updates	O
add	O
new	O
functionality	O
as	O
well	O
as	O
security	O
patches	O
to	O
prevent	O
unsigned	B-Device
code	I-Device
from	O
being	O
executed	O
on	O
the	O
system	O
.	O
</s>
<s>
Direct	O
download	O
to	O
the	O
PSP	B-Operating_System
over	O
Wi-Fi	O
.	O
</s>
<s>
This	O
can	O
be	O
performed	O
by	O
choosing	O
[Settings],	O
[	O
System	O
Update ]	O
from	O
the	O
XMB	B-Device
.	O
</s>
<s>
Download	O
to	O
a	O
PC	O
,	O
then	O
transfer	O
to	O
the	O
PSP	B-Operating_System
via	O
a	O
USB	B-Protocol
cable	O
or	O
Memory	O
Stick	O
.	O
</s>
<s>
These	O
games	O
may	O
not	O
run	O
with	O
earlier	O
firmware	B-Application
than	O
the	O
version	O
on	O
their	O
UMD	O
.	O
</s>
<s>
See	O
also	O
List	B-Application
of	I-Application
PlayStation	I-Application
Portable	I-Application
system	I-Application
software	I-Application
compatibilities	I-Application
.	O
</s>
<s>
Download	O
from	O
a	O
PS3	B-Operating_System
to	O
a	O
PSP	B-Operating_System
system	O
via	O
USB	B-Protocol
cable	O
.	O
</s>
<s>
While	O
system	B-Operating_System
software	I-Operating_System
updates	O
can	O
be	O
used	O
with	O
consoles	O
from	O
any	O
region	O
,	O
Sony	O
recommends	O
only	O
downloading	O
system	B-Operating_System
software	I-Operating_System
updates	O
released	O
for	O
the	O
region	O
corresponding	O
to	O
the	O
system	O
's	O
place	O
of	O
purchase	O
.	O
</s>
<s>
System	B-Operating_System
software	I-Operating_System
updates	O
have	O
added	O
various	O
features	O
including	O
a	O
web	B-Application
browser	I-Application
,	O
Adobe	B-Operating_System
Flash	I-Operating_System
Player	I-Operating_System
6	I-Operating_System
support	O
,	O
additional	O
codecs	O
for	O
images	O
,	O
audio	O
,	O
and	O
video	O
,	O
PlayStation	B-Operating_System
3	I-Operating_System
connectivity	O
,	O
as	O
well	O
as	O
patches	O
against	O
several	O
security	O
exploits	O
,	O
vulnerabilities	O
,	O
and	O
execution	O
of	O
homebrew	B-Application
programs	O
.	O
</s>
<s>
If	O
the	O
power	O
supply	O
is	O
lost	O
while	O
writing	O
to	O
the	O
system	B-Operating_System
software	I-Operating_System
,	O
the	O
console	O
will	O
no	O
longer	O
be	O
able	O
to	O
operate	O
unless	O
the	O
system	O
is	O
booted	O
in	O
service	O
mode	O
or	O
sent	O
to	O
Sony	O
for	O
repair	O
if	O
still	O
under	O
warranty	O
.	O
</s>
<s>
The	O
PlayStation	B-Operating_System
Portable	I-Operating_System
uses	O
the	O
XrossMediaBar	B-Device
(	O
XMB	B-Device
)	O
as	O
its	O
graphical	B-Application
user	I-Application
interface	I-Application
,	O
which	O
is	O
also	O
used	O
in	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
(	O
PS3	B-Operating_System
)	O
console	O
,	O
a	O
variety	O
of	O
Sony	O
BRAVIA	O
HDTVs	B-Device
,	O
Blu-ray	O
disc	O
players	O
and	O
many	O
more	O
Sony	O
products	O
.	O
</s>
<s>
XMB	B-Device
displays	O
icons	O
horizontally	O
across	O
the	O
screen	O
that	O
be	O
seen	O
as	O
categories	O
.	O
</s>
<s>
Users	O
can	O
navigate	O
through	O
them	O
using	O
the	O
left	O
and	O
right	O
buttons	O
of	O
the	O
D-pad	B-Device
,	O
which	O
move	O
the	O
icons	O
forward	O
or	O
back	O
across	O
the	O
screen	O
,	O
highlighting	O
just	O
one	O
at	O
a	O
time	O
,	O
as	O
opposed	O
to	O
using	O
any	O
kind	O
of	O
pointer	O
to	O
select	O
an	O
option	O
.	O
</s>
<s>
Users	O
may	O
navigate	O
among	O
these	O
options	O
by	O
using	O
the	O
up	O
and	O
down	O
buttons	O
of	O
the	O
D-pad	B-Device
.	O
</s>
<s>
The	O
basic	O
features	O
offered	O
by	O
XMB	B-Device
implementations	O
varies	O
based	O
on	O
device	O
and	O
software	O
version	O
.	O
</s>
<s>
On	O
the	O
PSP	B-Operating_System
console	O
,	O
the	O
XMB	B-Device
had	O
top	O
level	O
icons	O
for	O
Photos	O
,	O
Music	O
,	O
Videos	O
,	O
Games	O
,	O
Networking	O
(	O
which	O
allows	O
the	O
use	O
of	O
the	O
web	B-Application
browser	I-Application
)	O
,	O
Settings	O
and	O
Extras	O
.	O
</s>
<s>
Also	O
,	O
XMB	B-Device
offers	O
a	O
degree	O
of	O
multitasking	B-Operating_System
.	O
</s>
<s>
With	O
the	O
PSP	B-Operating_System
,	O
using	O
the	O
Home	O
button	O
while	O
playing	O
music	O
would	O
allow	O
users	O
to	O
browse	O
photos	O
without	O
stopping	O
the	O
music	O
.	O
</s>
<s>
While	O
XMB	B-Device
proved	O
to	O
be	O
a	O
successful	O
user	B-Application
interface	I-Application
for	O
Sony	O
products	O
such	O
as	O
PSP	B-Operating_System
and	O
PS3	B-Operating_System
,	O
the	O
next	B-Application
generation	I-Application
Sony	O
video	B-Application
game	I-Application
consoles	I-Application
such	O
as	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
the	O
PlayStation	B-Device
Vita	I-Device
no	O
longer	O
use	O
this	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
For	O
example	O
,	O
the	O
XMB	B-Device
is	O
replaced	O
by	O
the	O
LiveArea	O
interface	O
on	O
the	O
PS	B-Device
Vita	I-Device
.	O
</s>
<s>
The	O
PlayStation	B-Operating_System
Portable	I-Operating_System
comes	O
with	O
a	O
web	B-Application
browser	I-Application
for	O
browsing	O
the	O
Internet	O
.	O
</s>
<s>
The	O
web	B-Application
browser	I-Application
is	O
a	O
version	O
of	O
the	O
NetFront	B-Operating_System
browser	I-Operating_System
made	O
by	O
Access	O
Co	O
.	O
Ltd	O
.	O
and	O
was	O
released	O
for	O
free	O
with	O
the	O
2.00	O
system	B-Operating_System
software	I-Operating_System
update	O
.	O
</s>
<s>
The	O
browser	B-Application
supports	O
most	O
common	O
web	O
technologies	O
,	O
such	O
as	O
HTTP	B-Application
cookies	I-Application
,	O
forms	O
,	O
CSS	B-Language
,	O
as	O
well	O
as	O
basic	O
JavaScript	B-Language
capabilities	O
.	O
</s>
<s>
The	O
version	O
2.50	O
upgrade	O
added	O
Unicode	O
(	O
UTF-8	O
)	O
character	B-General_Concept
encoding	I-General_Concept
and	O
Auto-Select	O
as	O
options	O
in	O
the	O
browser	B-Application
's	O
encoding	O
menu	O
,	O
and	O
also	O
introduced	O
the	O
saving	O
of	O
input	O
history	O
for	O
online	O
forms	O
.	O
</s>
<s>
Version	O
2.70	O
of	O
the	O
PSP	B-Operating_System
's	O
system	B-Operating_System
software	I-Operating_System
introduced	O
basic	O
Flash	B-Operating_System
capabilities	O
to	O
the	O
browser	B-Application
.	O
</s>
<s>
However	O
,	O
the	O
player	O
runs	O
Flash	B-Operating_System
version	O
6	O
,	O
five	O
iterations	O
behind	O
the	O
current	O
desktop	O
version	O
11	O
,	O
making	O
some	O
websites	O
difficult	O
to	O
view	O
.	O
</s>
<s>
The	O
browser	B-Application
also	O
has	O
basic	O
tabbed	O
browsing	O
capabilities	O
,	O
with	O
a	O
maximum	O
of	O
three	O
tabs	O
.	O
</s>
<s>
When	O
a	O
website	O
tries	O
to	O
open	O
a	O
link	O
in	O
a	O
new	O
window	O
,	O
the	O
browser	B-Application
opens	O
it	O
in	O
a	O
new	O
tab	O
.	O
</s>
<s>
Parents	O
can	O
limit	O
content	O
by	O
enabling	O
Browser	B-Application
Start	O
Up	O
Control	O
which	O
blocks	O
all	O
access	O
to	O
the	O
web	B-Application
browser	I-Application
and	O
creating	O
a	O
4-digit	O
PIN	O
under	O
 [ Settings ] 	O
in	O
 [ Security ] 	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
browser	B-Application
can	O
be	O
configured	O
to	O
run	O
under	O
a	O
proxy	B-Application
server	I-Application
and	O
can	O
be	O
protected	O
by	O
the	O
security	O
PIN	O
to	O
enable	O
the	O
use	O
of	O
web	O
filtering	O
or	O
monitoring	O
software	O
through	O
a	O
network	O
.	O
</s>
<s>
Recently	O
,	O
TrendMicro	O
for	O
PSP	B-Operating_System
was	O
added	O
as	O
a	O
feature	O
that	O
can	O
be	O
enabled	O
via	O
a	O
subscription	O
to	O
filter	O
or	O
monitor	O
content	O
on	O
the	O
PSP	B-Operating_System
.	O
</s>
<s>
The	O
PSP	B-Operating_System
browser	B-Application
is	O
slower	O
compared	O
to	O
modern	O
browsers	B-Application
and	O
often	O
runs	O
out	B-General_Concept
of	I-General_Concept
memory	I-General_Concept
due	O
to	O
limitations	O
put	O
in	O
place	O
by	O
Sony	O
.	O
</s>
<s>
Alternatively	O
,	O
homebrew	B-Application
alternatives	O
to	O
the	O
browser	B-Application
have	O
been	O
released	O
that	O
utilize	O
all	O
32/64	O
MB	O
of	O
the	O
PSP	B-Operating_System
's	O
RAM	O
,	O
which	O
allows	O
the	O
browser	B-Application
to	O
load	O
pages	O
faster	O
and	O
have	O
more	O
memory	O
for	O
larger	O
pages	O
.	O
</s>
<s>
Opera	O
Mini	O
can	O
also	O
be	O
used	O
on	O
PSP	B-Operating_System
through	O
PSPKVM	O
,	O
a	O
homebrew	B-Application
application	O
which	O
is	O
a	O
Sun	O
Java	O
Virtual	O
Machine	O
.	O
</s>
<s>
It	O
was	O
claimed	O
to	O
provide	O
much	O
faster	O
loading	O
times	O
than	O
the	O
default	O
browser	B-Application
and	O
provides	O
better	O
web	O
page	O
compatibility	O
.	O
</s>
<s>
Like	O
many	O
other	O
video	B-Application
game	I-Application
consoles	I-Application
,	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
is	O
capable	O
of	O
photo	O
,	O
audio	O
,	O
and	O
video	O
playback	O
in	O
a	O
variety	O
of	O
formats	O
.	O
</s>
<s>
However	O
,	O
unlike	O
Sony	O
's	O
home	B-Device
consoles	I-Device
such	O
as	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
,	O
it	O
is	O
not	O
possible	O
to	O
play	O
Blu-ray	O
or	O
DVD	O
movies	O
on	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
directly	O
since	O
it	O
lacks	O
a	O
standard	O
Blu-ray	O
or	O
DVD	O
drive	O
.	O
</s>
<s>
While	O
it	O
does	O
have	O
a	O
UMD	O
drive	O
and	O
there	O
exist	O
UMD	O
movies	O
,	O
the	O
UMD	O
format	O
never	O
saw	O
implementation	O
on	O
any	O
device	O
other	O
than	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
and	O
as	O
a	O
result	O
,	O
the	O
market	O
is	O
very	O
limited	O
compared	O
to	O
those	O
for	O
other	O
optical	O
media	O
formats	O
.	O
</s>
<s>
There	O
have	O
been	O
no	O
more	O
movies	O
released	O
on	O
UMD	O
since	O
2011	O
,	O
with	O
Harry	B-Application
Potter	I-Application
and	I-Application
the	I-Application
Deathly	I-Application
Hallows	I-Application
–	I-Application
Part	I-Application
2	I-Application
being	O
one	O
of	O
the	O
final	O
releases	O
on	O
the	O
format	O
.	O
</s>
<s>
The	O
PlayStation	B-Operating_System
Portable	I-Operating_System
also	O
supports	O
a	O
feature	O
known	O
as	O
Remote	B-Device
Play	I-Device
,	O
which	O
allows	O
the	O
PSP	B-Operating_System
to	O
access	O
many	O
features	O
of	O
a	O
PlayStation	B-Operating_System
3	I-Operating_System
console	O
from	O
a	O
remote	O
location	O
using	O
the	B-Operating_System
PS3	I-Operating_System
's	O
WLAN	B-Architecture
capabilities	O
,	O
a	O
home	O
network	O
,	O
or	O
the	O
Internet	O
.	O
</s>
<s>
However	O
,	O
unlike	O
the	O
later	O
Remote	B-Device
Play	I-Device
feature	O
between	O
the	O
PlayStation	B-Device
Vita	I-Device
and	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
,	O
the	O
Remote	B-Device
Play	I-Device
capabilities	O
between	O
the	O
PSP	B-Operating_System
and	O
the	B-Operating_System
PS3	I-Operating_System
are	O
much	O
more	O
limited	O
.	O
</s>
<s>
Although	O
most	O
of	O
the	B-Operating_System
PS3	I-Operating_System
's	O
capabilities	O
related	O
to	O
its	O
main	O
user	B-Application
interface	I-Application
are	O
accessible	O
with	O
Remote	B-Device
Play	I-Device
,	O
playback	O
of	O
DVDs	O
,	O
Blu-ray	O
Discs	O
,	O
PlayStation	B-Device
2	I-Device
games	O
,	O
most	O
PlayStation	B-Operating_System
3	I-Operating_System
games	O
,	O
and	O
copy-protected	O
files	O
stored	O
on	O
the	B-Operating_System
PS3	I-Operating_System
's	O
hard	O
drive	O
are	O
not	O
supported	O
.	O
</s>
<s>
Actual	O
Remote	B-Device
Play	I-Device
between	O
the	O
PSP	B-Operating_System
and	O
the	B-Operating_System
PS3	I-Operating_System
games	O
are	O
only	O
supported	O
by	O
a	O
"	O
select	O
"	O
very	O
few	O
PS3	B-Operating_System
titles	O
.	O
</s>
<s>
Furthermore	O
,	O
PSP-2000	O
,	O
PSP-3000	O
,	O
and	O
PSP-N1000	O
can	O
use	O
the	O
Skype	B-Application
VoIP	B-Application
service	O
starting	O
with	O
system	B-Operating_System
software	I-Operating_System
version	O
3.90	O
.	O
</s>
<s>
The	O
service	O
allows	O
Skype	B-Application
calls	O
to	O
be	O
made	O
over	O
Wi-Fi	O
and	O
on	O
the	O
PSP	B-Operating_System
Go	O
over	O
the	O
Bluetooth	B-Protocol
Modem	O
feature	O
.	O
</s>
<s>
It	O
is	O
not	O
possible	O
to	O
use	O
the	O
VoIP	B-Application
service	O
on	O
the	O
original	O
PSP-1000	O
console	O
due	O
to	O
hardware	O
limitations	O
.	O
</s>
<s>
There	O
also	O
existed	O
other	O
services	O
for	O
the	O
PSP	B-Operating_System
such	O
as	O
the	O
Room	B-Language
for	I-Language
PlayStation	I-Language
Portable	I-Language
,	O
similar	O
to	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
's	O
online	O
community-based	O
service	O
known	O
as	O
PlayStation	B-Protocol
Home	I-Protocol
.	O
</s>
<s>
SensMe	B-Application
channels	O
for	O
music	O
files	O
was	O
added	O
to	O
the	O
PSP	B-Operating_System
starting	O
with	O
firmware	B-Application
version	O
6.10	O
.	O
</s>
<s>
Also	O
,	O
SHOUTCast	B-Application
Radio	O
can	O
be	O
listened	O
to	O
via	O
an	O
inbuilt	O
app	O
on	O
most	O
PSPs	B-Operating_System
.	O
</s>
<s>
Homebrew	B-Device
development	I-Device
was	O
very	O
popular	O
during	O
the	O
time	O
of	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
.	O
</s>
<s>
Besides	O
the	O
official	O
firmware	B-Application
(	O
OFW	O
)	O
made	O
by	O
Sony	O
,	O
custom	O
firmware	B-Application
(	O
also	O
written	O
as	O
Custom	O
Firmware	B-Application
,	O
or	O
simply	O
CFW	O
)	O
is	O
also	O
commonly	O
seen	O
in	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
handheld	O
consoles	O
.	O
</s>
<s>
Custom	O
firmware	B-Application
allows	O
the	O
running	O
of	O
unsigned	B-Device
code	I-Device
such	O
as	O
homebrew	B-Application
applications	O
,	O
UMD	O
.ISO	O
files	O
,	O
emulators	O
for	O
other	O
consoles	O
and	O
PS1	B-Device
games	O
when	O
the	O
disc	O
images	O
are	O
converted	O
into	O
an	O
EBOOT	B-Device
file	O
.	O
</s>
<s>
This	O
is	O
in	O
stark	O
contrast	O
to	O
the	O
official	O
system	B-Operating_System
software	I-Operating_System
,	O
where	O
only	O
code	O
that	O
has	O
been	O
signed	O
by	O
Sony	O
can	O
run	O
.	O
</s>
<s>
Notable	O
custom	O
firmware	B-Application
versions	O
include	O
the	O
M33	O
Custom	O
Firmware	B-Application
by	O
Dark_AleX	O
as	O
well	O
as	O
those	O
made	O
by	O
others	O
such	O
as	O
the	O
Custom	O
Firmware	B-Application
5.50GEN	O
series	O
,	O
Minimum	O
Edition	O
(	O
ME/LME	O
)	O
CFW	O
and	O
the	O
PRO	O
CFW	O
.	O
</s>
<s>
All	O
legally	O
and	O
illegally	O
obtained	O
content	O
can	O
be	O
played	O
on	O
custom	O
firmware	B-Application
,	O
assuming	O
that	O
it	O
is	O
at	O
the	O
latest	O
version	O
(	O
currently	O
6.61	O
)	O
.	O
</s>
<s>
During	O
the	O
early	O
days	O
of	O
the	O
PSP	B-Operating_System
hacking	O
scene	O
,	O
it	O
was	O
discovered	O
that	O
firmware	B-Application
1.00	O
allowed	O
unsigned	B-Device
code	I-Device
to	O
run	O
.	O
</s>
<s>
While	O
this	O
firmware	B-Application
only	O
existed	O
on	O
PSP-1000	O
models	O
from	O
Japan	O
,	O
many	O
users	O
imported	O
these	O
models	O
to	O
run	O
and	O
develop	O
homebrew	B-Application
.	O
</s>
<s>
An	O
exploit	O
was	O
later	O
discovered	O
in	O
firmware	B-Application
1.50	O
that	O
also	O
allowed	O
unsigned	B-Device
code	I-Device
to	O
run	O
.	O
</s>
<s>
This	O
opened	O
up	O
North	O
American	O
PSP-1000	O
systems	O
for	O
homebrew	B-Application
.	O
</s>
<s>
Firmware	B-Application
1.5	O
acted	O
as	O
the	O
standard	O
firmware	B-Application
for	O
homebrew	B-Application
until	O
the	O
creation	O
of	O
eLoaders	O
(	O
which	O
use	O
various	O
exploits	O
to	O
launch	O
a	O
homebrew	B-Application
"	O
menu	O
"	O
)	O
,	O
savegame	O
exploits	O
in	O
games	O
such	O
as	O
Grand	B-Application
Theft	I-Application
Auto	I-Application
:	I-Application
Liberty	I-Application
City	I-Application
Stories	I-Application
and	O
Lumines	B-Application
:	I-Application
Puzzle	I-Application
Fusion	I-Application
and	O
eventually	O
DarkAlex	O
's	O
custom	O
firmware	B-Application
releases	O
,	O
which	O
all	O
allowed	O
PSPs	B-Operating_System
shipped	O
after	O
the	O
1.51	O
update	O
's	O
release	O
to	O
run	O
homebrew	B-Application
.	O
</s>
<s>
Sony	O
had	O
put	O
significant	O
effort	O
into	O
blocking	O
custom	O
firmware	B-Application
and	O
other	O
third	O
party	O
devices/content	O
from	O
the	O
PSP	B-Operating_System
,	O
but	O
their	O
effort	O
was	O
in	O
vain	O
.	O
</s>
<s>
In	O
July	O
2007	O
Dark_AleX	O
officially	O
stopped	O
his	O
work	O
on	O
the	O
PSP	B-Operating_System
,	O
citing	O
perceived	O
problems	O
with	O
Sony	O
as	O
one	O
of	O
the	O
reasons	O
for	O
his	O
departure	O
,	O
but	O
other	O
custom	O
firmware	B-Application
versions	O
continue	O
to	O
be	O
developed	O
or	O
updated	O
.	O
</s>
<s>
In	O
2015	O
,	O
a	O
homebrew	B-Application
tool	O
known	O
as	O
Infinity	O
was	O
developed	O
which	O
allows	O
users	O
to	O
permanently	O
install	O
CFW	O
such	O
as	O
LME	O
or	O
PRO	O
on	O
all	O
PSP	B-Operating_System
models	O
.	O
</s>
<s>
This	O
tool	O
requires	O
firmware	B-Application
6.60	O
or	O
6.61	O
.	O
</s>
