<s>
PSXLinux	B-Operating_System
(	O
also	O
known	O
as	O
Runix	B-Operating_System
)	O
is	O
a	O
Linux	O
kernel	B-Operating_System
and	O
development	O
kit	O
for	O
the	O
PlayStation	B-Device
(	O
MIPS-NOMMU	O
)	O
.	O
</s>
<s>
PSXLinux	B-Operating_System
is	O
based	O
on	O
the	O
μClinux	B-Application
2.4.x	O
kernel	B-Operating_System
and	O
contains	O
specific	O
support	O
for	O
the	O
Sony	B-Device
PlayStation	I-Device
.	O
</s>
<s>
Various	O
attempts	O
to	O
compile	O
the	O
kernel	B-Operating_System
resulted	O
into	O
either	O
errors	O
or	O
people	O
unable	O
to	O
run	O
the	O
kernel	B-Operating_System
from	O
suggested	O
bootmethods	O
.	O
</s>
<s>
A	O
cross	B-Application
compiler	I-Application
is	O
required	O
to	O
make	O
the	O
kernel	B-Operating_System
compatible	O
for	O
the	O
PlayStations	B-Device
CPU	O
.	O
</s>
<s>
Loading	O
the	O
compiled	O
RUNIX	B-Operating_System
binary	O
(	O
PS-EXE	O
)	O
into	O
a	O
PlayStation	B-Device
may	O
be	O
done	O
by	O
using	O
a	O
Serial	O
Adapter	O
(	O
such	O
as	O
the	O
Net	O
Yaroze	O
Serial	O
Cable	O
)	O
or	O
Parallel	B-Device
Port	I-Device
device	O
(	O
Xplorer	O
,	O
Caetla	O
)	O
.	O
</s>
<s>
Another	O
method	O
is	O
by	O
installing	O
a	O
modchip	O
within	O
the	O
PlayStation	B-Device
and	O
burning	O
a	O
CD-ROM	B-Device
containing	O
the	O
executable	O
data	O
that	O
will	O
allow	O
the	O
system	O
to	O
boot	O
burned	O
discs	O
.	O
</s>
<s>
Runix	B-Operating_System
did	O
supply	O
some	O
tools	O
on	O
their	O
website	O
to	O
transfer	O
files	O
if	O
one	O
had	O
obtained	O
or	O
built	O
their	O
own	O
serial	O
cable	O
.	O
</s>
<s>
Due	O
to	O
Linux	O
ELF	O
format	O
not	O
supported	O
by	O
the	O
PlayStation	B-Device
,	O
conversion	O
is	O
required	O
and	O
a	O
suggested	O
path	O
is	O
to	O
first	O
convert	O
the	O
Linux	O
kernel	B-Operating_System
file	O
to	O
ECOFF	O
,	O
the	O
NetYaroze	O
native	O
executable	O
standard	O
.	O
</s>
<s>
This	O
can	O
be	O
done	O
with	O
an	O
enclosed	O
tool	O
called	O
elf2ecoff	O
inside	O
the	O
kernel	B-Operating_System
source	O
.	O
</s>
<s>
Next	O
step	O
is	O
converting	O
the	O
ECOFF	O
file	O
to	O
PS-EXE	O
file	O
,	O
the	O
format	O
found	O
on	O
PlayStation	B-Device
game	O
disks	O
,	O
after	O
CD-ROM	B-Device
mastering	O
a	O
valid	O
disk	O
image	O
.	O
</s>
<s>
From	O
Beta1	O
on	O
the	O
Runix	B-Operating_System
sources	O
support	O
Multiple	O
or	O
single	O
memorycards	O
of	O
the	O
PlayStations	B-Device
default	O
size	O
or	O
larger	O
.	O
</s>
<s>
Multiple	O
memory	O
cards	O
could	O
have	O
been	O
formatted	O
using	O
a	O
tool	O
Runix	B-Operating_System
supplied	O
on	O
their	O
website	O
to	O
format	O
into	O
Ext2	B-Application
.	O
</s>
