Filter
Top Products
SYSTEM
OBJECl'S
STRUCTURFS
The
base
displacement
field
contains
the
byte
displacement
into
the
432
segment used
to
construct
a
refinement
of
a
data
segment. See
Figure
3-2
for
an
illustration
of
the
role
of
a window's
base
displacement
in
forming a
refinement.
Mapping
Facility
Fault
Information
Area -
The
mapping
facili
ty
fault
information
area
consists
of
an
entry
fault
code and
fault
displacement
pair
for
each
map
entry.
Diagranmatically,
the
fault
information
for
each
map
entry
appears
as
shown
beiCM.
=
=
1----------------1
1
fault
disp
1
1----------------1
1
fault
code !
1----------------1
=
=
Each
entry
fault
code
field
is
used
to
record
the
cause
of
the
last
fault
associated
with
that
map
entry.
It
has
the
following
organization.
Ix! 6
bits
lxlxlxlxlxlxlxlxlxl
1 1
1 1
1--
read/write
1
1----
bus
error
1
1------
access
rights
1 1
-------
segment bound
1
1----------
memory
overflCM
1------------
access
direction
1--------------
post
termination
1---------------
partial
block
overflCM
1------------------
block
overflow
1------------------------
reserved
1-----------------------------
block
termination
(internal
use)
The
I-bit
read/write
subfield
indicates
whether
the
associated
fault
was caused by a
read
request
or
a
wr
i
te
request.
A
value
of
zero
irrlicates
that
the
fault
was
caused by a read
request.
A
value
of
one
indicates
that
the
fault
was caused by a
write
request.
The
I-bit
bus
error
subfield
indicates
whether
or
not
the
associated
faul
t
was
caused
by
a
432
bus
error.
A
value
of
zero
indicates
that
the
fault
was
not
caused
by
a bus
error.
A
value
of
one
indicates
that
the
fault
was caused
by
a bus
error.
A-19