<s>
In	O
memory	B-General_Concept
addressing	I-General_Concept
for	O
Intel	B-Operating_System
x86	I-Operating_System
computer	O
architectures	O
,	O
segment	B-Operating_System
descriptors	I-Operating_System
are	O
a	O
part	O
of	O
the	O
segmentation	B-General_Concept
unit	O
,	O
used	O
for	O
translating	O
a	O
logical	B-General_Concept
address	I-General_Concept
to	O
a	O
linear	O
address	O
.	O
</s>
<s>
Segment	B-Operating_System
descriptors	I-Operating_System
describe	O
the	O
memory	B-General_Concept
segment	I-General_Concept
referred	O
to	O
in	O
the	O
logical	B-General_Concept
address	I-General_Concept
.	O
</s>
<s>
The	O
segment	B-Operating_System
descriptor	I-Operating_System
(	O
8	O
bytes	O
long	O
in	O
80286	O
and	O
later	O
)	O
contains	O
the	O
following	O
fields	O
:	O
</s>
<s>
The	O
x86	B-Operating_System
and	O
x86-64	O
segment	B-Operating_System
descriptor	I-Operating_System
has	O
the	O
following	O
form	O
:	O
</s>
<s>
Base	O
Address	O
Starting	O
memory	B-General_Concept
address	I-General_Concept
of	O
the	O
segment	O
.	O
</s>
<s>
How	O
exactly	O
this	O
should	O
be	O
interpreted	O
depends	O
on	O
the	O
Granularity	O
bit	O
of	O
the	O
segment	B-Operating_System
descriptor	I-Operating_System
.	O
</s>
<s>
Type	O
If	O
set	O
,	O
this	O
is	O
a	O
code	O
segment	B-Operating_System
descriptor	I-Operating_System
.	O
</s>
<s>
If	O
clear	O
,	O
this	O
is	O
a	O
data/stack	O
segment	B-Operating_System
descriptor	I-Operating_System
,	O
which	O
has	O
"	O
D	O
"	O
replaced	O
by	O
"	O
B	O
"	O
,	O
"	O
C	O
"	O
replaced	O
by	O
"	O
E	O
"	O
and	O
"	O
R	O
"	O
replaced	O
by	O
"	O
W	O
"	O
.	O
</s>
