{
{   The purpose of this request is to write part of a line to a display.  Using
{ this request a display line can be generated piece by piece.  If this
{ operation would cause the page length of the display to be exceeeded, this
{ request calls clp$new_display_page.
{
{       CLP$PUT_PARTIAL_DISPLAY (DISPLAY_CONTROL, STR, TRIM_OPTION,
{         TERM_OPTION, STATUS)
{
{ DISPLAY_CONTROL: (input, output)  This parameter specifies the
{       display_control variable initialized when the display was opened.
{
{ STR: (input)  This parameter specifies the text to be written to the display.
{
{ TRIM_OPTION: (input)  This parameter specifies whether trailing spaces in STR
{       are to be trimmed prior to writing the text (CLC$TRIM) or not
{       (CLC$NO_TRIM).
{
{ TERM_OPTION: (input)  This parameter specifies whether the text is to be
{       written as the first part of a line (AMC$START), the "middle" of a line
{       (AMC$CONTINUE) or the end of a line (AMC$TERMINATE).  If AMC$START is
{       specified and a line has been partially written to the display, this
{       request flushes that line prior to writing the specified text.  If
{       AMC$CONTINUE is specified but no line has been started, the request is
{       processed as if AMC$START had been specified.  If AMC$TERMINATE is
{       specified but no line has been started, the request is processed as if
{       clp$put_display had been called instead.
{
{ STATUS: (output)  This parameter specifies the request status.
{
