<s>
The	O
Intel	B-Device
80186	I-Device
,	O
also	O
known	O
as	O
the	O
iAPX	B-Device
186	I-Device
,	O
or	O
just	O
186	B-Device
,	O
is	O
a	O
microprocessor	B-Architecture
and	O
microcontroller	B-Architecture
introduced	O
in	O
1982	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
the	O
Intel	B-General_Concept
8086	I-General_Concept
and	O
,	O
like	O
it	O
,	O
had	O
a	O
16-bit	B-Device
external	O
data	O
bus	O
multiplexed	O
with	O
a	O
20-bit	O
address	B-Architecture
bus	I-Architecture
.	O
</s>
<s>
The	O
80188	B-Device
variant	I-Device
,	O
with	O
an	O
8-bit	O
external	O
data	O
bus	O
was	O
also	O
available	O
.	O
</s>
<s>
The	O
80186	B-Device
series	O
was	O
generally	O
intended	O
for	O
embedded	B-Architecture
systems	I-Architecture
,	O
as	O
microcontrollers	B-Architecture
with	O
external	O
memory	O
.	O
</s>
<s>
Therefore	O
,	O
to	O
reduce	O
the	O
number	O
of	O
integrated	O
circuits	O
required	O
,	O
it	O
included	O
features	O
such	O
as	O
clock	O
generator	O
,	O
interrupt	B-Architecture
controller	I-Architecture
,	O
timers	O
,	O
wait	B-Device
state	I-Device
generator	O
,	O
DMA	B-General_Concept
channels	O
,	O
and	O
external	O
chip	B-Architecture
select	I-Architecture
lines	O
.	O
</s>
<s>
The	O
initial	O
clock	O
rate	O
of	O
the	O
80186	B-Device
was	O
6MHz	O
,	O
but	O
due	O
to	O
more	O
hardware	O
available	O
for	O
the	O
microcode	B-Device
to	O
use	O
,	O
especially	O
for	O
address	O
calculation	O
,	O
many	O
individual	O
instructions	O
completed	O
in	O
fewer	O
clock	O
cycles	O
than	O
on	O
an	O
8086	B-General_Concept
at	O
the	O
same	O
clock	O
frequency	O
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
common	O
register+immediate	O
addressing	B-Language
mode	I-Language
was	O
significantly	O
faster	O
than	O
on	O
the	O
8086	B-General_Concept
,	O
especially	O
when	O
a	O
memory	O
location	O
was	O
both	O
(	O
one	O
of	O
)	O
the	O
operand(s )	O
and	O
the	O
destination	O
.	O
</s>
<s>
Multiply	O
and	O
divide	O
also	O
showed	O
great	O
improvement	O
being	O
several	O
times	O
as	O
fast	O
as	O
on	O
the	O
original	O
8086	B-General_Concept
and	O
multi-bit	O
shifts	O
were	O
done	O
almost	O
four	O
times	O
as	O
quickly	O
as	O
in	O
the	O
8086	B-General_Concept
.	O
</s>
<s>
A	O
few	O
new	O
instructions	O
were	O
introduced	O
with	O
the	O
80186	B-Device
(	O
referred	O
to	O
as	O
the	O
8086-2	B-Device
instruction	I-Device
set	I-Device
in	O
some	O
datasheets	O
)	O
:	O
enter/leave	O
(	O
replacing	O
several	O
instructions	O
when	O
handling	O
stack	O
frames	O
)	O
,	O
pusha/popa	O
(	O
push/pop	O
all	O
general	O
registers	O
)	O
,	O
bound	O
(	O
check	O
array	O
index	O
against	O
bounds	O
)	O
,	O
and	O
ins/outs	O
(	O
input/output	O
of	O
string	O
)	O
.	O
</s>
<s>
These	O
instructions	O
were	O
also	O
included	O
in	O
the	O
contemporary	O
80286	B-General_Concept
and	O
in	O
successor	O
chips	O
.	O
</s>
<s>
The	O
(	O
redesigned	O
)	O
CMOS	B-Device
version	O
,	O
80C186	O
,	O
introduced	O
DRAM	B-General_Concept
refresh	I-General_Concept
,	O
a	O
power-save	O
mode	O
,	O
and	O
a	O
direct	O
interface	O
to	O
the	O
80C187	O
floating	O
point	O
numeric	O
coprocessor	B-General_Concept
.	O
</s>
<s>
Intel	O
second	O
sourced	O
this	O
microprocessor	B-Architecture
to	O
Fujitsu	O
Limited	O
around	O
1985	O
.	O
</s>
<s>
Both	O
packages	O
for	O
Intel	B-Device
80186	I-Device
version	O
were	O
available	O
in	O
68-pin	O
PLCC	B-Algorithm
and	O
PGA	B-Algorithm
in	O
sampling	O
at	O
third	O
quarter	O
of	O
1985	O
.	O
</s>
<s>
It	O
was	O
available	O
in	O
68-pin	O
PLCC	B-Algorithm
,	O
CPGA	O
,	O
or	O
CLCC	O
package	O
.	O
</s>
<s>
Because	O
the	O
integrated	O
hardware	O
of	O
the	O
80186	B-Device
,	O
designed	O
with	O
embedded	B-Architecture
systems	I-Architecture
in	O
mind	O
,	O
was	O
incompatible	O
with	O
the	O
hardware	O
used	O
in	O
the	O
original	O
IBM	B-Device
PC	I-Device
,	O
the	O
80286	B-General_Concept
was	O
chosen	O
to	O
succeed	O
the	O
8086	B-General_Concept
,	O
in	O
the	O
IBM	B-Operating_System
PC/AT	I-Operating_System
and	O
other	O
PC-compatible	O
systems	O
.	O
</s>
<s>
Several	O
notable	O
personal	B-Device
computers	I-Device
used	O
the	O
80186	B-Device
:	O
</s>
<s>
and	O
the	O
IBM	B-Device
PCradio	I-Device
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
above	O
examples	O
of	O
stand-alone	O
implementations	O
of	O
the	O
80186	B-Device
for	O
personal	B-Device
computers	I-Device
,	O
there	O
were	O
at	O
least	O
two	O
examples	O
of	O
"	O
add-in	O
"	O
accelerator	O
card	O
implementations	O
:	O
the	O
BBC	O
Master	O
512	O
,	O
Acorn	O
's	O
plug-in	O
for	O
the	O
BBC	O
Master	O
range	O
of	O
computers	O
containing	O
an	O
80186-10	O
with	O
512KB	O
of	O
RAM	O
,	O
and	O
the	O
Orchid	O
Technology	O
PC	O
Turbo	O
186	B-Device
,	O
released	O
in	O
1985	O
.	O
</s>
<s>
It	O
was	O
intended	O
for	O
use	O
with	O
the	O
original	O
Intel	O
8088-based	O
IBM	B-Device
PC	I-Device
(	O
Model	O
5150	O
)	O
.	O
</s>
<s>
The	O
Intel	B-Device
80186	I-Device
is	O
intended	O
to	O
be	O
embedded	O
in	O
electronic	O
devices	O
that	O
are	O
not	O
primarily	O
computers	O
.	O
</s>
<s>
its	O
offshoot	O
,	O
Intel	B-Device
80188	I-Device
was	O
embedded	O
inside	O
the	O
Intel	O
14.4EX	O
modem	O
released	O
in	O
1991	O
.	O
</s>
<s>
the	O
IBM	O
7171	O
protocol	O
converter	O
,	O
which	O
made	O
ASCII	O
character-oriented	O
terminals	O
appear	O
as	O
an	O
IBM	B-Operating_System
3270	I-Operating_System
terminal	O
to	O
an	O
IBM	O
mainframe	O
,	O
used	O
the	O
Intel	B-Device
80186	I-Device
as	O
its	O
CPU	O
.	O
</s>
<s>
In	O
May	O
2006	O
,	O
Intel	O
announced	O
that	O
production	O
of	O
the	O
186	B-Device
would	O
cease	O
at	O
the	O
end	O
of	O
September	O
2007	O
.	O
</s>
