{Define SYSTEM POINTER ADDRESS ARRAY.
{The SPAA contains real memory word addresses and PVAs of system tables referenced by the IOU.
{NOTE - array is terminated by an entry with an ADDRESS_TYPE equal to
{       osc$spid_list_termination, NOT by the 255th entry.

  VAR
    osv$spaa: [XREF] array [0 .. 255] of ost$spaa_entry;

?? PUSH (LISTEXT := ON) ??
*copyc OST$SPAA_ENTRY
?? POP ??
