<s>
The	O
R3000	B-Device
is	O
a	O
32-bit	O
RISC	B-Architecture
microprocessor	B-Architecture
chipset	B-Device
developed	O
by	O
MIPS	O
Computer	O
Systems	O
that	O
implemented	O
the	O
MIPS	O
I	O
instruction	B-General_Concept
set	I-General_Concept
architecture	I-General_Concept
(	O
ISA	O
)	O
.	O
</s>
<s>
Introduced	O
in	O
June	O
1988	O
,	O
it	O
was	O
the	O
second	O
MIPS	O
implementation	O
,	O
succeeding	O
the	O
R2000	B-Device
as	O
the	O
flagship	O
MIPS	O
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
MIPS	O
1	O
instruction	B-General_Concept
set	I-General_Concept
is	O
small	O
compared	O
to	O
those	O
of	O
the	O
contemporary	O
80x86	B-Operating_System
and	O
680x0	B-Device
architectures	O
,	O
encoding	O
only	O
more	O
commonly	O
used	O
operations	O
and	O
supporting	O
few	O
addressing	B-Language
modes	I-Language
.	O
</s>
<s>
It	O
employed	O
a	O
5-stage	O
instruction	B-General_Concept
pipeline	I-General_Concept
,	O
enabling	O
execution	O
at	O
a	O
rate	O
approaching	O
one	O
instruction	O
per	O
cycle	O
,	O
unusual	O
for	O
its	O
time	O
.	O
</s>
<s>
This	O
MIPS	O
generation	O
supports	O
up	O
to	O
four	O
co-processors	B-General_Concept
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
CPU	O
core	O
,	O
the	O
R3000	B-Device
microprocessor	B-Architecture
includes	O
a	O
Control	O
Processor	O
(	O
CP	O
)	O
,	O
which	O
contains	O
a	O
Translation	B-Architecture
Lookaside	I-Architecture
Buffer	I-Architecture
and	O
a	O
Memory	B-General_Concept
Management	I-General_Concept
Unit	I-General_Concept
.	O
</s>
<s>
The	O
CP	O
works	O
as	O
a	O
coprocessor	B-General_Concept
.	O
</s>
<s>
Besides	O
the	O
CP	O
,	O
the	O
R3000	B-Device
can	O
also	O
support	O
an	O
external	O
R3010	B-Device
numeric	O
coprocessor	B-General_Concept
,	O
along	O
with	O
two	O
other	O
external	O
coprocessors	B-General_Concept
.	O
</s>
<s>
The	O
R3000	B-Device
CPU	O
does	O
not	O
include	O
level	O
1	O
cache	B-General_Concept
.	O
</s>
<s>
Instead	O
,	O
its	O
on-chip	B-General_Concept
cache	I-General_Concept
controller	O
operates	O
external	O
data	O
and	O
instruction	O
caches	O
of	O
up	O
to	O
256KB	O
each	O
.	O
</s>
<s>
The	O
R3000	B-Device
found	O
much	O
success	O
and	O
was	O
used	O
by	O
many	O
companies	O
in	O
their	O
workstations	B-Device
and	O
servers	O
.	O
</s>
<s>
MIPS	O
Computer	O
Systems	O
for	O
their	O
MIPS	B-Operating_System
RISC/os	I-Operating_System
Unix	B-Device
workstations	I-Device
and	O
servers	O
.	O
</s>
<s>
NEC	O
for	O
their	O
RISC	B-Architecture
EWS4800	O
workstations	B-Device
and	O
UP4800	O
servers	O
.	O
</s>
<s>
Sony	O
for	O
their	O
PlayStation	B-Device
and	O
PlayStation	B-Device
2	I-Device
(	O
SCPH-10000	O
to	O
SCPH-700XX	O
-	O
clocked	O
at	O
37.5MHz	O
for	O
use	O
as	O
an	O
I/O	O
CPU	O
and	O
at	O
33.8MHz	O
for	O
compatibility	O
with	O
PlayStation	B-Device
games	O
)	O
video	O
game	O
consoles	O
,	O
and	O
NEWS	B-Operating_System
workstations	B-Device
,	O
as	O
well	O
as	O
the	O
Bemani	B-Application
System	I-Application
573	I-Application
Analog	I-Application
arcade	O
unit	O
,	O
which	O
runs	O
on	O
the	O
R3000A	B-Device
.	O
</s>
<s>
The	O
R3000	B-Device
was	O
also	O
used	O
as	O
an	O
embedded	B-Architecture
microprocessor	I-Architecture
.	O
</s>
<s>
Companies	O
such	O
as	O
LSI	O
Logic	O
developed	O
derivatives	O
of	O
the	O
R3000	B-Device
specifically	O
for	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
The	O
R3000	B-Device
was	O
a	O
further	O
development	O
of	O
the	O
R2000	B-Device
with	O
minor	O
improvements	O
including	O
larger	O
TLB	B-Architecture
and	O
a	O
faster	O
bus	O
to	O
the	O
external	O
caches	O
.	O
</s>
<s>
The	O
R3000	B-Device
die	O
contained	O
115,000	O
transistors	O
and	O
measured	O
about	O
75,000	O
square	O
mils	O
(	O
48mm2	O
)	O
.	O
</s>
<s>
MIPS	O
was	O
a	O
fabless	B-Algorithm
semiconductor	I-Algorithm
company	I-Algorithm
,	O
so	O
the	O
R3000	B-Device
was	O
fabricated	O
by	O
MIPS	O
partners	O
including	O
Integrated	O
Device	O
Technology	O
(	O
IDT	O
)	O
,	O
LSI	O
Logic	O
,	O
NEC	O
Corporation	O
,	O
Performance	O
Semiconductor	O
,	O
and	O
others	O
.	O
</s>
<s>
Derivatives	O
of	O
the	O
R3000	B-Device
for	O
non-embedded	O
applications	O
include	O
:	O
</s>
<s>
R3000A	B-Device
-	O
A	O
further	O
development	O
by	O
MIPS	O
introduced	O
in	O
1989	O
.	O
</s>
<s>
Derivatives	O
of	O
the	O
R3000	B-Device
for	O
embedded	O
applications	O
include	O
:	O
</s>
<s>
Models	O
include	O
the	O
R3041	O
,	O
R3051	B-Device
,	O
R3052	O
,	O
R3071	O
and	O
R3081	O
.	O
</s>
<s>
Mongoose-V	B-General_Concept
-	O
A	O
radiation-hardened	O
and	O
expanded	O
10	O
–	O
15MHz	O
CPU	O
for	O
use	O
on	O
spacecraft	O
,	O
it	O
is	O
still	O
in	O
use	O
today	O
in	O
applications	O
such	O
as	O
NASA	O
's	O
New	O
Horizons	O
space	O
probe	O
.	O
</s>
