<s>
The	O
RCA	B-Device
1600	I-Device
is	O
a	O
discontinued	O
16-bit	B-Device
minicomputer	B-Architecture
designed	O
and	O
built	O
by	O
RCA	O
in	O
West	O
Palm	O
Beach	O
,	O
Florida	O
and	O
Marlboro	O
,	O
Massachusetts	O
.	O
</s>
<s>
The	O
1600	O
was	O
intended	O
for	O
use	O
in	O
embedded	B-Architecture
systems	I-Architecture
,	O
and	O
was	O
retained	O
by	O
UNIVAC	O
and	O
used	O
in	O
products	O
such	O
as	O
the	O
Accuscan	O
supermarket	O
checkout	O
system	O
in	O
the	O
1970s	O
.	O
</s>
<s>
The	O
1600	O
uses	O
magnetic-core	O
memory	O
with	O
a	O
cycle	O
time	O
on	O
1.6μsec	O
,	O
structured	O
as	O
words	O
of	O
18	O
bits	O
—	O
16	O
data	O
bits	O
,	O
one	O
parity	B-Error_Name
bit	I-Error_Name
,	O
and	O
one	O
memory	B-General_Concept
protection	I-General_Concept
bit	O
.	O
</s>
<s>
Attempts	O
to	O
store	O
into	O
protected	B-General_Concept
memory	I-General_Concept
are	O
trapped	O
if	O
memory	B-General_Concept
protection	I-General_Concept
is	O
enabled	O
by	O
a	O
console	O
switch	O
.	O
</s>
<s>
The	O
processor	O
has	O
sixteen	O
16-bit	B-Device
"	O
standard	O
"	O
registers	O
,	O
eight	O
for	O
each	O
program	O
state	O
.	O
</s>
<s>
Program	O
state	O
one	O
is	O
used	O
for	O
normal	O
execution	O
,	O
program	O
state	O
two	O
is	O
used	O
for	O
interrupt	B-Application
service	O
routines	O
.	O
</s>
<s>
Register	O
8	O
is	O
the	O
instruction	B-General_Concept
counter	I-General_Concept
in	O
both	O
states	O
.	O
</s>
<s>
All	O
instructions	O
are	O
16	B-Device
bits	I-Device
,	O
must	O
be	O
located	O
on	O
a	O
word	O
boundary	O
,	O
and	O
therefore	O
can	O
be	O
accessed	O
in	O
one	O
machine	O
cycle	O
of	O
1.6μsec	O
.	O
</s>
