<s>
The	O
SM-4	B-Device
(	O
CM-4	O
)	O
is	O
a	O
PDP-11/40	B-Device
compatible	O
system	O
,	O
manufactured	O
in	O
the	O
Eastern	O
Bloc	O
in	O
the	O
1980s	O
.	O
</s>
<s>
The	O
standard	O
configuration	O
includes	O
128	O
or	O
256	O
KB	O
core	O
memory	O
,	O
tape	O
puncher	O
,	O
two	O
RK-05	O
removable	O
2.5	O
MB	O
disks	O
and	O
two	O
RK-05F	O
fixed	O
disks	O
,	O
two	O
TU-10	O
drives	O
and	O
Videoton	O
VDT-340	O
terminals	O
(	O
VT52	B-Application
non-compatible	O
)	O
.	O
</s>
<s>
The	O
SM-4	B-Device
processor	O
operates	O
at	O
900,000	O
operations	O
per	O
second	O
.	O
</s>
<s>
The	O
SM-series	O
also	O
includes	O
the	O
SM-3	O
.	O
</s>
<s>
The	O
SM-3	O
lacks	O
floating	B-Algorithm
point	I-Algorithm
processing	O
,	O
similar	O
to	O
DEC	O
's	O
PDP	O
11/40	O
and	O
11/34	O
models	O
.	O
</s>
<s>
The	O
SM-4	B-Device
was	O
manufactured	O
in	O
seven	O
configurations	O
,	O
numbers	O
SM-1401	O
through	O
SM-1407	O
.	O
</s>
<s>
Similar	O
models	O
include	O
the	O
SM-1420	B-Device
,	O
with	O
semiconductor	O
memory	O
,	O
and	O
the	O
SM-1600	O
,	O
a	O
hybrid	O
of	O
the	O
SM-1420	B-Device
and	O
the	O
M-6000	O
,	O
a	O
system	O
produced	O
in	O
Minsk	O
.	O
</s>
<s>
The	O
main	O
producer	O
of	O
the	O
SM-4	B-Device
was	O
Minpribor	O
,	O
at	O
a	O
facility	O
in	O
Kyiv	O
,	O
Ukraine	O
,	O
which	O
began	O
production	O
in	O
1980	O
.	O
</s>
