<s>
The	O
K	B-Device
1820	I-Device
,	O
full	O
name	O
RVS	O
K	B-Device
1820	I-Device
(	O
,	O
"	O
computer	O
system	O
with	O
virtual	B-Architecture
memory	I-Architecture
"	O
)	O
,	O
cipher	O
in	O
the	O
SM	B-Device
EVM	I-Device
of	O
the	O
former	O
COMECON	O
countries	O
SM	B-Device
1720	O
,	O
is	O
a	O
workstation	B-Device
developed	O
in	O
East	O
Germany	O
.	O
</s>
<s>
VEB	O
Robotron	O
Elektronik	O
Dresden	O
began	O
development	O
of	O
the	O
K	B-Device
1820	I-Device
in	O
1986	O
and	O
it	O
went	O
into	O
serial	O
production	O
in	O
1990	O
.	O
</s>
<s>
The	O
K	B-Device
1820	I-Device
is	O
a	O
clone	B-General_Concept
of	O
the	O
MicroVAX	O
II	O
made	O
by	O
Digital	O
Equipment	O
Corporation	O
(	O
DEC	O
)	O
.	O
</s>
<s>
As	O
the	O
MicroVAXII	O
CPU	B-Device
is	O
one	O
of	O
the	O
first	O
semiconductor	O
devices	O
which	O
was	O
protected	O
by	O
the	O
Semiconductor	O
Chip	O
Protection	O
Act	O
of	O
1984	O
,	O
independent	O
development	O
of	O
modern	O
CAD	B-Application
technology	O
based	O
on	O
a	O
32-bit	O
computer	B-General_Concept
architecture	I-General_Concept
began	O
.	O
</s>
<s>
The	O
K1820	O
extends	O
the	O
VAX-compatible	O
computer	O
line	O
in	O
the	O
SM	B-Device
EVM	I-Device
and	O
the	O
models	O
of	O
the	O
K1820	O
achieve	O
approximately	O
90%	O
of	O
the	O
performance	O
of	O
the	O
K	B-Device
1840	I-Device
(	O
Robotron	O
"	O
RVS	O
K	B-Device
1840	I-Device
"	O
,	O
compatible	O
with	O
the	O
VAX	B-Device
11/780	O
)	O
.	O
</s>
<s>
The	O
K1820	O
is	O
based	O
on	O
the	O
VLSI	O
U80700-microprocessor	O
system	O
,	O
its	O
32-bit	O
CPU	B-Device
U80701	B-Device
was	O
developed	O
according	O
to	O
the	O
MicroVAX	B-Device
78032	I-Device
.	O
</s>
<s>
A	O
VT220-compatible	O
terminal	B-General_Concept
,	O
the	O
K8941	O
,	O
was	O
developed	O
for	O
the	O
machine	O
.	O
</s>
<s>
At	O
least	O
one	O
prototype	O
of	O
the	O
K	B-Device
1820	I-Device
is	O
owned	O
by	O
the	O
Technische	O
Sammlungen	O
Museum	O
.	O
</s>
