<s>
CP	O
450	O
was	O
a	O
large	O
cabinet	O
containing	O
a	O
floppy	B-Device
disk	I-Device
drive	I-Device
interface	O
,	O
exactly	O
like	O
the	O
TRS-80	B-Device
Color	I-Device
Computer	I-Device
,	O
manufactured	O
by	O
Prológica	O
,	O
a	O
computer	O
company	O
located	O
in	O
Brazil	O
.	O
</s>
<s>
The	O
standard	O
operating	O
system	O
is	O
DOS-400	B-Language
,	O
an	O
adapted	O
and	O
renamed	O
copy	O
of	O
disk	O
Extended	B-Language
Color	I-Language
BASIC	I-Language
(	O
DECB	O
or	O
RSDOS	O
)	O
.	O
</s>
<s>
It	O
was	O
also	O
possible	O
to	O
run	O
other	O
operating	O
systems	O
,	O
such	O
as	O
Microware	B-Operating_System
OS-09	I-Operating_System
and	O
TSC	B-Device
Flex9	I-Device
.	O
</s>
<s>
Using	O
OS-9	B-Operating_System
allowed	O
the	O
user	O
to	O
access	O
all	O
64	O
KB	O
of	O
RAM	B-Architecture
available	O
on	O
this	O
particular	O
version	O
of	O
the	O
CP	B-Device
400	I-Device
.	O
</s>
<s>
The	O
CP	O
450	O
units	O
stopped	O
being	O
manufactured	O
at	O
the	O
end	O
of	O
1986	O
,	O
along	O
with	O
other	O
accessories	O
suitable	O
for	O
the	O
CP	B-Device
400	I-Device
.	O
</s>
