{
{   This request can be used to determine whether a PVA
{ can be accessed by a program without causing an access
{ violation or segment fault.
{
{       MMP$VERIFY_ACCESS (PVA_P, ACCESS_MODE): BOOLEAN
{
{ PVA_P: (input) This parameter is a pointer to the PVA to be
{       tested.
{
{ ACCESS_MODE: (input) This parameter specifies the type of
{       access to be tested.
{
{ BOOLEAN: (output) The boolean result of this function specifies
{       whether access is valid.
{
