{
{    The purpose of this request is to convert a logical file address
{  (byte address) to the corresponding logical device address for a write
{  operation.  Space will be allocated up to and including the logical file
{  address if necessary.
{
{        DMP$WRITE(P_FDE, BYTE_ADDRESS, LENGTH, DEVICE_ADDRESS, STATUS)
{
{ P_FDE:(input)  This parameter specifies a pointer to the file descriptor
{                entry for the file.
{
{ BYTE_ADDRESS:(input)  This parameter specifies the logical file address for
{                       the write.
{
{ LENGTH: (input)    This parameter specifies the length to be written.
{
{ DEVICE_ADDRESS:(output)  This parameter returns the logical device address
{                          that corresponds to the logical file address
{                          (byte address).
{
{ STATUS:(output)  This parameter returns the request status.
{
