{
{  The purpose of this request is to suspend execution of the requesting
{ task if IO is active for the specified page. If IO is not active
{ or if the page is not in memory, this request completes immediately and a
{ normal status is returned. If IO is active, execution of the task
{ is suspended until all IO to the page is completed.
{
{    MMP$WAIT_IO_COMPLETION (P, STATUS)
{
{  P: (INPUT) This parameter specifies the address of the page.
{
{  STATUS: (OUTPUT) This parameter specifies request status.
{
