<s>
The	O
Hewlett-Packard	O
FOCUS	O
microprocessor	B-Architecture
,	O
launched	O
in	O
1982	O
,	O
was	O
the	O
first	O
commercial	O
,	O
single	O
chip	O
,	O
fully	O
32-bit	O
microprocessor	B-Architecture
available	O
on	O
the	O
market	O
.	O
</s>
<s>
used	O
multi-chip	O
bit-slice-CPU	O
designs	O
,	O
while	O
single-chip	O
designs	O
like	O
the	O
Motorola	B-Device
68000	I-Device
were	O
a	O
mix	O
of	O
32	O
and	O
16-bit	B-Device
.	O
</s>
<s>
Introduced	O
in	O
the	O
Hewlett-Packard	O
HP	O
9000	O
Series	O
500	O
workstations	O
and	O
servers	O
(	O
originally	O
launched	O
as	O
the	O
HP	O
9020	O
and	O
also	O
,	O
unofficially	O
,	O
called	O
HP	O
9000	O
Series	O
600	O
)	O
,	O
the	O
single-chip	O
CPU	O
was	O
used	O
alongside	O
the	O
I/O	O
Processor	O
(	O
IOP	O
)	O
,	O
Memory	O
Controller	O
(	O
MMU	O
)	O
,	O
Clock	O
,	O
and	O
a	O
number	O
of	O
128-kilobit	O
dynamic	O
RAM	B-Architecture
devices	O
as	O
the	O
basis	O
of	O
the	O
HP	O
9000	O
system	O
architecture	O
.	O
</s>
<s>
It	O
was	O
a	O
32-bit	O
implementation	O
of	O
the	O
16-bit	B-Device
HP	B-Device
3000	I-Device
computer	O
's	O
stack	B-Application
architecture	I-Application
,	O
with	O
over	O
220	O
instructions	O
(	O
some	O
32	O
bits	O
wide	O
,	O
some	O
16	B-Device
bits	I-Device
wide	O
)	O
,	O
a	O
segmented	O
memory	O
model	O
,	O
and	O
no	O
general	O
purpose	O
programmer-visible	O
registers	B-General_Concept
.	O
</s>
<s>
The	O
design	O
of	O
the	O
FOCUS	O
CPU	O
was	O
richly	O
inspired	O
by	O
the	O
custom	O
silicon	B-Algorithm
on	I-Algorithm
sapphire	I-Algorithm
(	O
SOS	O
)	O
chip	O
design	O
HP	O
used	O
in	O
their	O
HP	B-Device
3000	I-Device
series	O
machines	O
.	O
</s>
<s>
Because	O
of	O
the	O
high	O
density	O
of	O
HP	O
's	O
NMOS-III	B-Algorithm
IC	O
process	O
,	O
heat	O
dissipation	O
was	O
a	O
problem	O
.	O
</s>
<s>
The	O
Focus	O
CPU	O
is	O
microcoded	B-Device
with	O
a	O
9,216	O
by	O
38-bit	O
microcode	B-Device
control	B-General_Concept
store	I-General_Concept
.	O
</s>
<s>
Internal	O
data	O
paths	O
and	O
registers	B-General_Concept
are	O
all	O
32-bit	O
wide	O
.	O
</s>
