
{   The purpose of this request is to allow any of the following system
{ conditions to arise in the requesting block and its subordinates:
{      pmc$divide_fault, pmc$arithmetic_overflow, pmc$exponent_overflow,
{      pmc$exponent_underflow, pmc$fp_significance_loss, pmc$fp_indefinite,
{      pmc$arithmetic_significance, pmc$invalid_bdp_data.
{ For each system condition being enabled, if the condition is pending
{ as the result of a previous inhibit, that condition is cleared prior to
{ enabling the condition.
{
{   NOTE: All system conditions, except pmc$fp_significance_loss, are enabled
{         before the starting procedure executes.
{
{       PMP$ENABLE_SYSTEM_CONDITIONS (CONDITIONS, STATUS)
{
{ CONDITIONS: (input) This parameter specifies the conditions to be enabled.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITION: pme$unselectable_condition.
{       IDENTIFIER: pmc$program_management_id.
{
