{
{   The purpose of this request is to assign a device to a segment.
{ This procedure must be called by procedures that issue explicit
{ memory manager requests.   This procedure provides an interface
{ to segment manager when the caller is running beyond ring 3.
{
{       MMP$ASSIGN_DEVICE_TO_SEGMENT (PVA, STATUS)
{
{ PVA: (input) This parameter specifies the segment to which a
{       device should be assigned.
{
{ STATUS: (output) The request status is returned in this parameter.
{
