<s>
The	O
CPC	B-Device
464	I-Device
is	O
the	O
first	O
personal	O
home	O
computer	O
built	O
by	O
Amstrad	O
in	O
1984	O
.	O
</s>
<s>
It	O
was	O
one	O
of	O
the	O
bestselling	O
and	O
best	O
produced	O
microcomputers	B-Architecture
,	O
with	O
more	O
than	O
2	O
million	O
units	O
sold	O
in	O
Europe	O
.	O
</s>
<s>
The	O
British	O
microcomputer	B-Architecture
boom	O
had	O
already	O
peaked	O
before	O
Amstrad	O
announced	O
the	O
CPC	B-Device
464	I-Device
(	O
which	O
stood	O
for	O
Colour	B-Device
Personal	I-Device
Computer	I-Device
)	O
which	O
they	O
then	O
released	O
a	O
mere	O
9	O
months	O
later	O
.	O
</s>
<s>
Amstrad	O
was	O
known	O
for	O
cheap	O
hi-fi	O
products	O
but	O
had	O
not	O
broken	O
into	O
the	O
home	O
computer	O
market	O
until	O
the	O
CPC	B-Device
464	I-Device
.	O
</s>
<s>
The	O
CPC	B-Device
464	I-Device
is	O
powered	O
by	O
the	O
Zilog	B-General_Concept
Z80	I-General_Concept
processor	O
after	O
the	O
original	O
attempts	O
to	O
use	O
the	O
6502	O
processor	O
,	O
being	O
used	O
in	O
the	O
Apple	B-Device
II	I-Device
amongst	O
many	O
other	O
8-bit	O
computer	O
families	O
,	O
failed	O
.	O
</s>
<s>
The	O
Z80	B-General_Concept
runs	O
at	O
4MHz	O
,	O
has	O
64K	O
of	O
memory	O
and	O
runs	O
AMSDOS	B-Operating_System
,	O
Amstrad	O
's	O
own	O
OS	B-General_Concept
.	O
</s>
<s>
The	O
graphics	O
are	O
generated	O
by	O
a	O
Motorola	B-General_Concept
6845	I-General_Concept
chip	O
,	O
providing	O
3	O
standard	O
display	O
modes	O
,	O
each	O
using	O
colours	O
chosen	O
from	O
a	O
palette	O
of	O
27	O
.	O
</s>
<s>
Its	O
sound	O
is	O
supplied	O
using	O
the	O
General	B-Device
Instruments	I-Device
AY-3-8912	I-Device
sound	O
chip	O
that	O
provides	O
3-voice	O
,	O
8-octave	O
sound	O
capacity	O
through	O
a	O
built-in	O
loudspeaker	O
with	O
volume	O
control	O
.	O
</s>
<s>
The	O
CPC	B-Device
464	I-Device
's	O
code	O
name	O
during	O
development	O
was	O
'	O
Arnold	O
 '	O
.	O
</s>
