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iAPX
432
Interface
Processor
Architecture
Reference
Manual
The W
field
specifies
whether
the
fault
was
on
a
read
or
write
access.
A
value
of
zero
indicates
a
read
access.
A
value
of
one
indicates
a
write
access.
The
faulted
displacement
is
recorded
in
the
fault
displacement
(in
access
memory,
or
interconnect),
and
in
the
object
index
field
of
the
fault
object
selector
(in
access
access
segment).
The
BBBB
field,
which
designates
which segment was
being
accessed
when
the
fault
occurred,
is
defined
as
follows:
BBBB
Segment
Name
0000
Context
AS
0001
Entry
AS
1
0010
Entry
AS
2
0011
Entry
AS
3
0100
Object
Table
Directory
0101
Object
Table
0110
Processor
AS
0111
Processor
DB
1000
Context
DB
1001
Process
AS
1010
Process
DB
1011
WorkA
(Carrier
OS)
1100
WorkB
(Carrier
AS)
1101
WorkC
(Port
OS)
1110
WorkD
(Port
AS)
1111 Mapping
Facility
System Type
Or
Descriptor
Type
Faults
The
faul
t code
for
system
type
or
descr
iptor
type
faults
is
as
follows:
DIIXXXXX
KKKKKKKK
The D
field
indicates
which
on-chip
register
was
being
tested.
A
value
of
zero
irrlicates
that
the
type
information
being
tested
was
in
TempA.
A
value
of
one
indicates
that
the
type
information
being
tested
was
in
TempB.
The
KKKKKKKK
field
indicates
the
desired
system
type,
or
the
desired
obj
ect
descr
iptor
type,
descr
iptor
validity,
base
type,
and
storage
associated
bit
fields.
All
Other
Faults
The
fault
code
for
all
other
faults
is
as
follows:
XOXXXXXX
XX'I'I'EEEE
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