<s>
The	O
Intel	B-Device
Paragon	I-Device
is	O
a	O
discontinued	O
series	O
of	O
massively	B-Operating_System
parallel	I-Operating_System
supercomputers	B-Architecture
that	O
was	O
produced	O
by	O
Intel	O
in	O
the	O
1990s	O
.	O
</s>
<s>
The	O
Paragon	O
XP/S	O
is	O
a	O
productized	O
version	O
of	O
the	O
experimental	O
Touchstone	B-Device
Delta	I-Device
system	O
that	O
was	O
built	O
at	O
Caltech	O
,	O
launched	O
in	O
1992	O
.	O
</s>
<s>
The	O
Paragon	O
series	O
is	O
based	O
on	O
the	O
Intel	B-General_Concept
i860	I-General_Concept
RISC	B-Architecture
microprocessor	B-Architecture
.	O
</s>
<s>
Intel	O
intended	O
the	O
Paragon	O
to	O
run	O
the	O
OSF/1	B-Operating_System
AD	O
distributed	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
on	O
all	O
processors	O
.	O
</s>
<s>
However	O
,	O
this	O
was	O
found	O
to	O
be	O
inefficient	O
in	O
practice	O
,	O
and	O
a	O
light-weight	B-Device
kernel	I-Device
called	O
SUNMOS	O
was	O
developed	O
at	O
Sandia	O
National	O
Laboratories	O
to	O
replace	O
OSF/1	B-Operating_System
AD	O
on	O
the	O
Paragon	O
's	O
compute	O
processors	O
.	O
</s>
<s>
The	O
prototype	O
for	O
the	O
Intel	B-Device
Paragon	I-Device
was	O
the	O
Intel	O
Delta	O
,	O
built	O
by	O
Intel	O
with	O
funding	O
from	O
DARPA	O
and	O
installed	O
operationally	O
at	O
the	O
California	O
Institute	O
of	O
Technology	O
in	O
the	O
late	O
1980s	O
with	O
funding	O
from	O
the	O
National	O
Science	O
Foundation	O
.	O
</s>
<s>
During	O
system	O
software	O
development	O
,	O
a	O
light-pen	O
was	O
duct-taped	O
to	O
the	O
status	O
LED	O
on	O
one	O
board	O
and	O
a	O
timer	O
interrupt	O
was	O
used	O
to	O
bit	B-Algorithm
bang	I-Algorithm
a	O
serial	B-Protocol
port	I-Protocol
.	O
</s>
<s>
The	O
IO	O
boards	O
have	O
either	O
SCSI	B-Architecture
drive	O
interfaces	O
or	O
HiPPI	B-Architecture
network	O
connections	O
and	O
are	O
used	O
to	O
provide	O
data	O
to	O
the	O
compute	O
nodes	O
.	O
</s>
<s>
The	O
MP64	O
I/O	O
node	O
has	O
three	O
i860	O
CPUs	O
and	O
an	O
i960	B-General_Concept
CPU	O
used	O
in	O
the	O
disk	O
controller	O
.	O
</s>
