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8086
Object
Module
Formats
Version
4.0
A Name
Index
with
value
zero
carries
special
siqnificance:
it
specifies
all
~ames.
(Note:
Name
Indices
with
zero
value
may
not
occur
in
other
record
types.)
If
the
first
byte
of
the
DESCRIPTOR
contains
0FBH.
then
the
DESCRIPTOR
contains
3
more
fields.
which
are
the
LTL
OAT
field.
the
maximum
length
of
the
qroup,
and
the
lenqth
of
the
qroup.
This
descriptor,
if
present.
must·
precede
all
other
descriptors
in
the
record.
There
may
be
at
most
one
descriptor
of
this
type
in
a
GRPDEF
record.
There
may
not
be
any
absolute
component
in
the
qroup.
A
seqment
can
not
be
in
two
such
qroups.
The
LTL
DATA
field
has
the
followinq
format:
*********************************
* I I I I I I , *
* Z I Z I Z I Z I Z I Z IBGLIBGM*
* I I I I I I I *
*********************************
Zis
indicate
that
these
I-bit
fields
have
not
currently
assigned
a
function.
These
bits
are
required
to
be
zero.
been
BGL
(Biq
Group
Lenqth)
is
a
I-bit
subfield
that.
if
1.
specifies
that
the
Group
lenqth
is
exactly
64K.
In
this
case
the
GROUP
LENGTH
subfield
must
contain
zero.
BGM
(Biq
Group
Maximum
Lenqth)
is
a
I-bit
subfield
that,
if
1,
specifies
that
the
maximum
qroup
length
is
exactly
~4K.
In
this
case
the
MAXIMUM
GROUP
LENGTH
subfield
must
contain
zero.
The
GROUP
LENGTH
subfield
specifies
the
length
of
the
group
that
has
been
determined
after
the
Group
is
~locatedM,
and
the
seqments
in
the
group
arc
put
in
contiquous
memory
area.
All
fixups
have
been
performed
relative
to
the
base
of
the
Group.
The
MAXIMU~
GROUP
LENGTH
subfield
specifies
the
maximum
lenqth
. . ~
of
the
qroup
that
has
been
determined
after
the
Group
is
~located",
using
the
maximum
lenqths
of
the
segment
components.
·If
the
first
byte
of
the
DESCRIPTOR
contains
0FAH,
then
the
DESCRIPTOR
contains
the
address
of
the
Group.
Once
a
Group
has
been
LOCATEd.
it
has
an
address
chosen
by
LOCA
r
rE-8f),
relative
to
which
all
fixups
have
been
performed.
If
fixups
relative
to
the
Group
base
are
required
after
LOCATE-8~
has
assiqned
an
address
to
the
Group
then
the
FRAME.
NU~BER
should
be
used
as
the
base.
The
address
of
the
Group
is
also
available
for
debuqqinq
systems
such
as
ICE.
If
a
Group
has
been
assiqned
an
address
by
LOCATE-86
then
it
is
absolute
and
this
descriptor
must
precede
all
other
descriptors
in
the
record.
There
may
be
at
most
one
descriptor
of
this
type
in
a
GRPDEr"'
reco
rd.
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