<s>
The	O
Amstrad	O
PPC512	O
and	O
Amstrad	O
PPC640	O
were	O
the	O
first	O
portable	O
IBM	B-Device
PC	I-Device
compatible	O
computers	O
made	O
by	O
Amstrad	O
.	O
</s>
<s>
As	O
portable	B-Device
computers	I-Device
,	O
they	O
contained	O
all	O
the	O
elements	O
necessary	O
to	O
perform	O
computing	O
on	O
the	O
move	O
.	O
</s>
<s>
They	O
had	O
a	O
keyboard	O
and	O
a	O
monochrome	O
LCD	B-Device
display	I-Device
built	O
in	O
and	O
also	O
had	O
space	O
for	O
disposable	O
batteries	O
to	O
power	O
the	O
PC	O
where	O
a	O
suitable	O
alternative	O
power	O
source	O
(	O
i.e.	O
</s>
<s>
The	O
PCs	O
came	O
with	O
either	O
one	O
or	O
two	O
double	O
density	O
double	O
side	O
floppy	B-Device
disc	I-Device
drives	I-Device
and	O
the	O
PPC640	O
model	O
also	O
featured	O
a	O
modem	B-Application
.	O
</s>
<s>
The	O
PPC512	O
had	O
an	O
NEC	B-Device
V30	I-Device
processor	O
running	O
at	O
8	O
MHz	O
,	O
512	O
KiB	O
of	O
memory	O
,	O
a	O
full-size	O
102-key	O
keyboard	O
with	O
a	O
numeric	O
keypad	O
,	O
a	O
built-in	O
liquid	B-Device
crystal	I-Device
display	I-Device
(	O
not	O
backlit	O
)	O
that	O
could	O
emulate	O
the	O
CGA	B-Device
or	O
MDA	B-Device
and	O
either	O
one	O
or	O
two	O
720k	B-Device
3.5	B-Device
"	I-Device
floppy	B-Device
drives	I-Device
(	O
the	O
model	O
was	O
either	O
the	O
PPC512S	O
or	O
PPC512D	O
depending	O
on	O
the	O
number	O
of	O
drives	O
it	O
had	O
)	O
.	O
</s>
<s>
The	O
PPC640	O
was	O
otherwise	O
identical	O
except	O
that	O
it	O
had	O
640	O
KiB	O
of	O
memory	O
,	O
a	O
built-in	O
2400	O
baud	O
modem	B-Application
(	O
unusually	O
fast	O
for	O
its	O
day	O
)	O
,	O
and	O
its	O
case	O
was	O
a	O
darker	O
shade	O
of	O
grey	O
.	O
</s>
<s>
Both	O
versions	O
of	O
the	O
machine	O
had	O
an	O
empty	O
socket	O
on	O
the	O
main	O
circuit	O
board	O
so	O
that	O
an	O
Intel	B-Device
8087	I-Device
coprocessor	O
could	O
be	O
installed	O
to	O
permit	O
hardware	O
processing	O
of	O
floating	O
point	O
arithmetic	O
.	O
</s>
<s>
The	O
PPC	O
included	O
standard	O
connectors	O
for	O
RS-232	O
,	O
Centronics	B-Device
and	O
CGA/MDA	O
video	O
,	O
allowing	O
existing	O
peripherals	O
to	O
be	O
used	O
.	O
</s>
<s>
All	O
the	O
signals	O
used	O
by	O
the	O
8-bit	O
ISA	B-Architecture
bus	I-Architecture
were	O
also	O
available	O
through	O
a	O
pair	O
of	O
expansion	O
connectors	O
.	O
</s>
<s>
Ten	O
C-size	O
alkaline	B-Algorithm
batteries	I-Algorithm
.	O
</s>
<s>
The	O
hinges	B-Operating_System
were	O
therefore	O
at	O
the	O
front	O
of	O
the	O
main	O
unit	O
,	O
rather	O
than	O
the	O
back	O
.	O
</s>
<s>
The	O
LCD	B-Device
was	O
hinged	O
separately	O
and	O
folded	O
down	O
into	O
a	O
recess	O
on	O
the	O
top	O
of	O
the	O
system	O
unit	O
.	O
</s>
<s>
The	O
one	O
or	O
two	O
floppy	B-Device
drives	I-Device
were	O
located	O
on	O
the	O
right-hand	O
side	O
.	O
</s>
<s>
A	O
bank	O
of	O
six	O
DIP	O
switches	O
was	O
used	O
to	O
select	O
whether	O
the	O
video	O
hardware	O
emulated	O
CGA	B-Device
or	O
MDA	B-Device
,	O
and	O
whether	O
to	O
use	O
an	O
internal	O
or	O
external	O
monitor	O
.	O
</s>
<s>
No	O
official	O
hard	B-Device
drive	I-Device
option	O
or	O
docking	B-Device
station	I-Device
was	O
manufactured	O
,	O
but	O
both	O
were	O
sold	O
by	O
third-party	O
manufacturers	O
.	O
</s>
<s>
MS-DOS	B-Application
3.3	I-Application
was	O
supplied	O
with	O
all	O
PPCs	O
,	O
along	O
with	O
PPC	O
Organiser	O
-	O
a	O
memory-resident	O
suite	O
of	O
utilities	O
including	O
a	O
card	O
file	O
,	O
diary	O
,	O
calculator	O
and	O
telephone	O
dialler	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
PPC640	O
was	O
supplied	O
with	O
Mirror	O
II	O
,	O
a	O
communications	O
package	O
for	O
use	O
with	O
the	O
built-in	O
modem	B-Application
.	O
</s>
<s>
The	O
MS-DOS	B-Application
boot	B-Operating_System
disk	I-Operating_System
also	O
included	O
a	O
utility	O
which	O
could	O
be	O
used	O
to	O
switch	O
between	O
the	O
internal	O
display	O
and	O
an	O
external	O
monitor	O
without	O
rebooting	O
.	O
</s>
<s>
This	O
machine	O
was	O
available	O
in	O
two	O
versions	O
,	O
Sinclair	B-Device
PC200	I-Device
and	O
Amstrad	O
PC20	O
.	O
</s>
