<s>
During	O
the	O
late	O
1980s	O
,	O
Intel	O
sold	O
two	O
ISA	B-Architecture
expansion	O
cards	O
named	O
Intel	O
Inboard	O
386/AT	O
and	O
Intel	O
Inboard	O
386/PC	O
,	O
which	O
allowed	O
users	O
to	O
upgrade	O
an	O
IBM	B-Operating_System
AT	I-Operating_System
or	O
an	O
IBM	B-Device
PC	I-Device
(	O
or	O
compatible	O
)	O
respectively	O
.	O
</s>
<s>
The	O
boards	O
allowed	O
users	O
to	O
upgrade	O
their	O
machines	O
 '	O
CPU	O
to	O
a	O
16MHz	O
80386	B-General_Concept
processor	O
.	O
</s>
<s>
Both	O
boards	O
were	O
full-length	O
ISA	B-Architecture
expansion	O
cards	O
and	O
occupied	O
one	O
slot	O
.	O
</s>
<s>
Each	O
card	O
came	O
with	O
1MB	O
of	O
onboard	O
memory	O
as	O
standard	O
,	O
included	O
an	O
80386	B-General_Concept
processor	O
,	O
and	O
included	O
a	O
socket	O
for	O
an	O
80387	O
math	O
coprocessor	O
.	O
</s>
<s>
Originally	O
,	O
the	O
Intel	O
Board	O
386/AT	O
offered	O
board	O
without	O
memory	O
and	O
1MB	O
of	O
memory	O
for	O
USD	O
$	O
1,995	O
and	O
USD	O
$	O
2,495	O
respectfully	O
.	O
</s>
<s>
The	O
4MB	O
board	O
was	O
only	O
produced	O
for	O
the	O
Inboard	O
386/PC	O
.	O
</s>
<s>
Though	O
the	O
80386	B-General_Concept
was	O
a	O
32	O
bit	O
CPU	O
,	O
it	O
was	O
limited	O
to	O
a	O
16-bit	O
I/O	O
bus	O
in	O
the	O
case	O
of	O
the	O
Intel	O
Inboard	O
386/AT	O
and	O
an	O
8-bit	O
I/O	O
bus	O
in	O
the	O
case	O
of	O
the	O
Intel	O
Inboard	O
386/PC	O
.	O
</s>
<s>
Although	O
computers	O
upgraded	O
with	O
the	O
Intel	B-Device
Inboard	I-Device
386	I-Device
featured	O
16MHz	O
80386	B-General_Concept
processors	O
,	O
they	O
still	O
tended	O
to	O
be	O
inferior	O
to	O
most	O
386-class	O
machines	O
,	O
as	O
they	O
still	O
sported	O
their	O
original	O
(	O
by	O
then	O
obsolete	O
)	O
motherboard	O
bus	O
circuitry	O
(	O
e.g.	O
</s>
<s>
DMA	O
,	O
ISA	B-Architecture
bus	I-Architecture
,	O
etc	O
.	O
)	O
</s>
<s>
The	O
Intel	O
Inboards	O
allowed	O
users	O
to	O
run	O
386-dependent	O
software	O
which	O
would	O
not	O
normally	O
run	O
on	O
an	O
XT	O
or	O
AT	O
class	O
machine	O
.	O
</s>
<s>
Examples	O
of	O
such	O
programs	O
include	O
:	O
Ventura	O
2.0	O
Desktop	O
Publishing	O
Software	O
(	O
with	O
Hercules	O
monochrome	O
graphics	O
)	O
,	O
Autocad	O
386	B-General_Concept
,	O
Windows	O
3.1	O
(	O
Inboard	O
386/AT	O
model	O
only	O
)	O
.	O
</s>
