<s>
picoJava	B-Language
is	O
a	O
microprocessor	B-Architecture
specification	O
dedicated	O
to	O
native	B-Language
execution	I-Language
of	O
Java	B-Language
bytecode	I-Language
without	O
the	O
need	O
for	O
an	O
interpreter	B-Application
or	O
just-in-time	O
compilation	O
.	O
</s>
<s>
The	O
aim	O
is	O
to	O
speed	O
bytecode	O
execution	O
up	O
by	O
up	O
to	O
20	O
times	O
,	O
compared	O
to	O
standard	O
Intel	O
CPU	B-General_Concept
with	O
a	O
Java	B-Language
virtual	I-Language
machine	I-Language
.	O
</s>
<s>
GNU	B-Application
Compiler	I-Application
Collection	I-Application
has	O
been	O
available	O
until	O
version	O
3.2.3	O
as	O
machine	O
definition	O
'	O
pj	O
,	O
'	O
probably	O
first	O
patch	O
was	O
for	O
version	O
2.9	O
.	O
</s>
<s>
GNU	B-Application
Binutils	I-Application
is	O
still	O
available	O
as	O
machine	O
definition	O
'	O
pj	O
,	O
'	O
as	O
of	O
Binutil	O
version	O
2.28	O
.	O
</s>
<s>
GNU	B-Language
Debugger	I-Language
was	O
once	O
implemented	O
,	O
but	O
code	O
might	O
be	O
lost	O
.	O
</s>
<s>
Sun	O
Microsystems	O
provided	O
instruction	B-Application
set	I-Application
simulator	I-Application
worked	O
with	O
GDB	B-Language
as	O
SCSL	O
open	B-Application
source	I-Application
code	I-Application
.	O
</s>
<s>
This	O
approach	O
results	O
in	O
the	O
fastest	O
Java	B-Language
runtime	I-Language
performance	O
with	O
a	O
small	O
memory	B-General_Concept
footprint	O
and	O
competitive	O
performance	O
on	O
code	O
not	O
written	O
in	O
the	O
Java	O
language	O
.	O
</s>
<s>
The	O
picoJava	B-Language
specification	O
does	O
not	O
include	O
any	O
memory	B-General_Concept
or	O
I/O	B-General_Concept
interface	I-General_Concept
logic	O
,	O
so	O
that	O
developers	O
can	O
add	O
their	O
own	O
logic	O
to	O
customize	O
memory	B-General_Concept
and	O
an	O
interface	B-Application
.	O
</s>
<s>
picoJava	B-Language
was	O
originally	O
designed	O
to	O
be	O
used	O
in	O
consumer	O
electronic	O
products	O
that	O
run	O
Java	O
applications	O
.	O
</s>
<s>
The	O
Verilog	B-Language
code	O
of	O
picoJava	B-Language
was	O
later	O
released	O
under	O
SCSL	O
open	B-Application
source	I-Application
code	I-Application
,	O
but	O
the	O
download	O
page	O
is	O
currently	O
not	O
available	O
.	O
</s>
<s>
In	O
2000	O
Fujitsu	O
released	O
the	O
J-Starter	O
Kit	O
,	O
a	O
development	O
system	O
featuring	O
a	O
picoJava	B-Language
Architecture	O
processor	O
.	O
</s>
<s>
The	O
open-source	B-Application
version	O
of	O
picoJava	B-Language
has	O
been	O
implemented	O
in	O
an	O
FPGA	B-Architecture
.	O
</s>
