<s>
The	O
SGI	B-Application
Origin	I-Application
200	I-Application
,	O
code	O
named	O
Speedo	O
,	O
was	O
an	O
entry-level	O
server	B-Application
computer	I-Application
developed	O
and	O
manufactured	O
by	O
SGI	O
,	O
introduced	O
in	O
October	O
1996	O
to	O
accompany	O
their	O
mid-range	O
and	O
high-end	O
Origin	B-Application
2000	I-Application
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
same	O
architecture	O
as	O
the	O
Origin	B-Application
2000	I-Application
but	O
has	O
an	O
unrelated	O
hardware	O
implementation	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
introduction	O
,	O
these	O
systems	O
ran	O
the	O
IRIX	B-Operating_System
6.4	O
,	O
and	O
later	O
,	O
the	O
IRIX	B-Operating_System
6.5	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
The	O
Origin	B-Application
200	I-Application
was	O
discontinued	O
on	O
30	O
June	O
2002	O
.	O
</s>
<s>
The	O
Origin	B-Application
200	I-Application
consists	O
of	O
one	O
or	O
two	O
modules	O
.	O
</s>
<s>
In	O
configurations	O
with	O
two	O
modules	O
,	O
the	O
NUMAlink	B-Architecture
2	I-Architecture
(	O
originally	O
CrayLink	B-Architecture
)	O
interconnection	O
fabric	O
is	O
used	O
to	O
connect	O
the	O
two	O
modules	O
together	O
.	O
</s>
<s>
Using	O
two	O
modules	O
,	O
the	O
Origin	B-Application
200	I-Application
's	O
capabilities	O
(	O
the	O
number	O
of	O
processors	O
,	O
the	O
amount	O
of	O
memory	O
,	O
etc	O
.	O
)	O
</s>
<s>
The	O
Origin	B-Application
200	I-Application
and	O
the	O
Origin	B-Application
200	I-Application
GIGAchannel	O
enclosures	O
can	O
be	O
configured	O
as	O
a	O
tower	O
with	O
"	O
skins	O
"	O
that	O
covered	O
the	O
bare	O
metal	O
for	O
cosmetic	O
purposes	O
,	O
or	O
as	O
a	O
rackmountable	O
enclosure	O
compatible	O
with	O
19	O
-	O
or	O
21-inch	O
racks	O
.	O
</s>
<s>
In	O
configurations	O
where	O
an	O
Origin	B-Application
200	I-Application
GIGAchannel	O
expansion	O
cabinet	O
is	O
used	O
,	O
the	O
module	O
also	O
contains	O
a	O
Crosstown	O
board	O
that	O
plugs	O
into	O
the	O
motherboard	O
.	O
</s>
<s>
The	O
motherboard	O
contains	O
the	O
Hub	O
ASIC	O
,	O
a	O
PCI	O
bridge	O
,	O
two	O
SCSI	B-Architecture
controllers	O
,	O
two	O
UARTs	O
and	O
an	O
Ethernet	O
controller	O
.	O
</s>
<s>
When	O
first	O
introduced	O
,	O
the	O
Origin	B-Application
200	I-Application
supported	O
one	O
or	O
two	O
R10000	B-General_Concept
processors	O
with	O
1	O
or	O
4MB	O
L2	O
cache	O
each	O
.	O
</s>
<s>
In	O
August	O
1998	O
,	O
an	O
upgraded	O
PIMM	O
featuring	O
the	O
225MHz	O
R10000	B-General_Concept
processors	O
was	O
introduced	O
.	O
</s>
<s>
Later	O
,	O
270MHz	O
R12000	B-General_Concept
processors	O
became	O
available	O
.	O
</s>
<s>
The	O
motherboard	O
supports	O
32MB	O
to	O
2GB	O
of	O
memory	O
through	O
eight	O
DIMM	B-General_Concept
slots	O
organised	O
into	O
four	O
banks	O
.	O
</s>
<s>
DIMMs	B-General_Concept
with	O
capacities	O
of	O
16	O
,	O
32	O
,	O
64	O
and	O
256MB	O
are	O
supported	O
.	O
</s>
<s>
DIMMs	B-General_Concept
are	O
installed	O
in	O
pairs	O
.	O
</s>
<s>
The	O
Origin	B-Application
200	I-Application
GIGAchannel	O
is	O
an	O
expansion	O
cabinet	O
that	O
connects	O
to	O
the	O
Origin	B-Application
200	I-Application
modules	O
via	O
two	O
XIO	B-Architecture
cables	O
.	O
</s>
<s>
It	O
provides	O
an	O
additional	O
four	O
PCI-X	O
slots	O
and	O
five	O
XIO	B-Architecture
slots	O
.	O
</s>
<s>
The	O
GIGAchannel	O
contains	O
a	O
Crossbow	O
(	O
Xbow	O
)	O
ASIC	O
,	O
which	O
is	O
an	O
eight-port	O
crossbar	O
provides	O
the	O
five	O
datapaths	O
to	O
the	O
five	O
XIO	B-Architecture
slots	O
and	O
a	O
single	O
datapath	O
to	O
PCI	O
bridge	O
.	O
</s>
<s>
The	O
remaining	O
two	O
ports	O
on	O
the	O
ASIC	O
are	O
connected	O
to	O
the	O
XIO	B-Architecture
connectors	O
used	O
to	O
interface	O
the	O
subsystem	O
to	O
the	O
Origin	B-Application
200	I-Application
modules	O
.	O
</s>
