<s>
The	O
Honeywell	B-Device
6000	I-Device
series	I-Device
computers	O
were	O
rebadged	O
versions	O
of	O
General	O
Electric	O
's	O
600-series	B-Device
mainframes	B-Architecture
manufactured	O
by	O
Honeywell	O
International	O
,	O
Inc	O
.	O
from	O
1970	O
to	O
1989	O
.	O
</s>
<s>
In	O
1973	O
,	O
Honeywell	O
introduced	O
the	O
6180	O
,	O
a	O
6000-series	O
machine	O
with	O
addressing	O
modifications	O
to	O
support	O
the	O
Multics	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
The	O
Multics	B-Application
model	O
was	O
the	O
DPS-8/M	O
.	O
</s>
<s>
Each	O
module	O
provided	O
two-way	O
interleaved	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
Memory	O
protection	O
and	O
relocation	O
was	O
accomplished	O
using	O
a	O
base	B-General_Concept
and	I-General_Concept
bounds	I-General_Concept
register	O
in	O
the	O
processor	O
,	O
the	O
Base	O
Address	O
Register	O
(	O
BAR	O
)	O
.	O
</s>
<s>
The	O
older	O
DATANET-30	B-Device
and	O
the	O
DATANET	O
305	O
—	O
intended	O
for	O
smaller	O
systems	O
with	O
up	O
to	O
twelve	O
terminals	O
attached	O
to	O
an	O
IOM	O
.	O
</s>
<s>
An	O
eight-bit	O
Exponent	O
Register	O
contained	O
the	O
exponent	O
for	O
floating	B-Algorithm
point	I-Algorithm
operations	O
(	O
the	O
mantissa	B-Algorithm
was	O
in	O
AQ	O
)	O
.	O
</s>
<s>
There	O
were	O
eight	O
eighteen-bit	O
index	B-General_Concept
registers	I-General_Concept
X0	O
through	O
X7	O
.	O
</s>
<s>
The	O
18-bit	O
Base	O
Address	O
Register	O
(	O
BAR	O
)	O
contained	O
the	O
base	O
address	O
and	O
number	O
of	O
1024-word	O
blocks	O
assigned	O
to	O
the	O
program	O
(	O
the	O
6180	O
used	O
segmentation	B-General_Concept
rather	O
than	O
the	O
BAR	O
)	O
.	O
</s>
<s>
Binary	O
fixed-point	O
data	O
was	O
stored	O
in	O
twos-complement	B-General_Concept
.	O
</s>
<s>
Binary	B-Algorithm
floating-point	I-Algorithm
data	O
could	O
be	O
single	O
precision	O
(	O
36	O
bits	O
)	O
or	O
double	O
precision	O
(	O
72	O
bits	O
)	O
.	O
</s>
<s>
In	O
either	O
case	O
the	O
exponent	O
was	O
eight	O
bits	O
,	O
twos-complement	B-General_Concept
binary	O
.	O
</s>
<s>
The	O
mantissa	B-Algorithm
was	O
either	O
28	O
or	O
64	O
bits	O
,	O
twos-complement	B-General_Concept
binary	O
.	O
</s>
<s>
The	O
primary	O
operating	B-General_Concept
system	I-General_Concept
for	O
the	O
line	O
was	O
the	O
General	B-Application
Comprehensive	I-Application
Operating	I-Application
System	I-Application
(	O
GCOS	B-Application
)	O
,	O
which	O
Honeywell	O
originally	O
inherited	O
from	O
General	O
Electric	O
's	O
GECOS	B-Application
.	O
</s>
<s>
In	O
1978	O
Honeywell	O
introduced	O
a	O
rewritten	O
version	O
GCOS	B-Application
8	O
,	O
which	O
supported	O
virtual	B-Architecture
memory	I-Architecture
.	O
</s>
<s>
The	O
Multics	B-Application
OS	O
also	O
ran	O
on	O
selected	O
CPU	O
models	O
.	O
</s>
<s>
In	O
1974	O
,	O
Honeywell	O
purchased	O
Xerox	O
Data	O
Systems	O
(	O
XDS	O
)	O
,	O
and	O
developed	O
a	O
work-alike	O
of	O
the	O
Xerox	O
operating	B-General_Concept
system	I-General_Concept
CP-V	B-Operating_System
as	O
CP-6	B-Operating_System
to	O
run	O
on	O
DPS-8	O
systems	O
in	O
order	O
to	O
retain	O
Xerox	O
 '	O
loyal	O
customer	O
base	O
.	O
</s>
