{
{   The purpose of this request is to discard any data accumulated for a line,
{ e.g.  via clp$put_partial_display requests.  This request is meaningless if
{ the most recent "write" operation to the display was via clp$put_display or
{ clp$put_partial_display with the amc$terminate option.
{
{       CLP$DISCARD_ACCUMULATED_DISPLAY (DISPLAY_CONTROL, STATUS)
{
{ DISPLAY_CONTROL: (input, output)  This parameter specifies the
{       display_control variable initialized when the display was opened.
{
{ STATUS: (output)  This parameter specifies the request status.
{
