<s>
The	O
Compaq	B-Device
Portable	I-Device
II	I-Device
is	O
the	O
fourth	O
product	O
in	O
the	O
Compaq	B-Device
Portable	I-Device
series	I-Device
to	O
be	O
brought	O
out	O
by	O
Compaq	O
Computer	O
Corporation	O
.	O
</s>
<s>
Released	O
in	O
1986	O
at	O
a	O
price	O
of	O
US$3499	O
,	O
the	O
Portable	O
II	O
much	O
improved	O
upon	O
its	O
predecessor	O
,	O
the	O
Compaq	O
286	B-General_Concept
,	O
which	O
had	O
been	O
Compaq	O
's	O
version	O
of	O
the	O
PC	B-Operating_System
AT	I-Operating_System
in	O
the	O
original	O
Compaq	O
Portable	O
chassis	O
;	O
Portable	O
286	B-General_Concept
came	O
equipped	O
with	O
6/8	O
-MHz	O
286	B-General_Concept
and	O
a	O
high-speed	O
20-MB	O
hard	B-Device
drive	I-Device
,	O
while	O
the	O
Portable	O
II	O
included	O
an	O
8MHz	O
processor	O
,	O
and	O
was	O
lighter	O
and	O
smaller	O
than	O
the	O
previous	O
Compaq	B-Device
Portables	I-Device
.	O
</s>
<s>
There	O
were	O
four	O
models	O
of	O
the	O
Compaq	B-Device
Portable	I-Device
II	I-Device
.	O
</s>
<s>
The	O
basic	O
Model	O
1	O
shipped	O
one	O
5.25	B-Device
"	I-Device
floppy	B-Device
drive	I-Device
and	O
256	O
KB	O
of	O
RAM	O
.	O
</s>
<s>
The	O
Model	O
2	O
added	O
a	O
second	O
5.25	B-Device
"	I-Device
floppy	B-Device
drive	I-Device
and	O
sold	O
for	O
$3599	O
.	O
</s>
<s>
The	O
Model	O
3	O
shipped	O
with	O
a	O
10MB	O
hard	B-Device
disk	I-Device
in	O
addition	O
to	O
one	O
5.25	B-Device
"	I-Device
floppy	B-Device
drive	I-Device
and	O
640	O
KB	O
of	O
RAM	O
for	O
$4799	O
at	O
launch	O
.	O
</s>
<s>
The	O
Model	O
4	O
would	O
upgrade	O
the	O
Model	O
3	O
with	O
a	O
20MB	O
hard	B-Device
drive	I-Device
and	O
sold	O
for	O
$4999	O
.	O
</s>
<s>
There	O
also	O
may	O
have	O
been	O
a	O
4.1	O
MB	O
hard	B-Device
drive	I-Device
included	O
at	O
one	O
point	O
.	O
</s>
<s>
The	O
Compaq	B-Device
Portable	I-Device
II	I-Device
was	O
significantly	O
lighter	O
than	O
its	O
predecessors	O
,	O
the	O
Model	O
1	O
weighed	O
just	O
23.6	O
pounds	O
compared	O
to	O
the	O
30.5	O
pounds	O
the	O
Compaq	B-Device
Portable	I-Device
286	I-Device
weighed	O
.	O
</s>
<s>
The	O
Compaq	B-Device
Portable	I-Device
II	I-Device
was	O
succeeded	O
by	O
the	O
Compaq	B-Device
Portable	I-Device
III	I-Device
in	O
1987	O
.	O
</s>
<s>
The	O
Compaq	B-Device
Portable	I-Device
II	I-Device
had	O
room	O
for	O
additional	O
after	O
market	O
upgrades	O
.	O
</s>
<s>
With	O
640	O
KB	O
installed	O
on	O
the	O
motherboard	O
and	O
both	O
the	O
ISA	B-Architecture
card	I-Architecture
and	O
the	O
expansion	O
board	O
,	O
the	O
computer	O
could	O
be	O
upgraded	O
with	O
up	O
to	O
a	O
maximum	O
of	O
4.2MB	O
of	O
RAM	O
.	O
</s>
<s>
The	O
motherboard	O
had	O
four	O
ISA	B-Architecture
slots	I-Architecture
for	O
expansion	O
cards	O
,	O
two	O
8-bit	O
and	O
two	O
16-bit	O
.	O
</s>
<s>
However	O
,	O
the	O
first	O
16-bit	O
ISA	B-Architecture
slot	I-Architecture
was	O
occupied	O
by	O
a	O
Multi	O
I/O	O
board	O
with	O
serial	B-Protocol
,	O
parallel	B-Device
,	O
PATA	B-Protocol
and	O
Floppy	B-Device
interfaces	O
,	O
and	O
the	O
second	O
8-bit	O
ISA	B-Architecture
slot	I-Architecture
was	O
used	O
by	O
the	O
CGA	B-Device
graphics	I-Device
card	O
,	O
leaving	O
two	O
available	O
slots	O
.	O
</s>
