NOTES: 'SUPMAC' IS A SET OF NESTED MACROS WHICH PROVIDE MACRO PROGRAMS WITH A NUMBER OF STRUCTURED PROGRAMMING CONSTRUCTS. ALL EXISTING MACRO-11 SYNTAX ELEMENTS MAY ALSO BE INTERSPERSED WITH THE 'SUPMAC' MACRO CALLS. THE USE OF THESE MACROS WILL TEND TO SLOW DOWN THE ASSEMBLY PROCESS BY A LARGE AMOUNT. THEREFORE, THE LARGEST POSSIBLE VERSION OF MACRO SHOULD BE USED ('PURMAX'). FULL DOCUMENTATION FOR 'SUPMAC' IS PROVIDED IN THE ACCOMPANYING RUNOFF FILE. NOTE: IT MIGHT BE WISE TO MAKE THE MACRO LIBRARY CONTIGUOUS TO INCREASE ACCESS TIME.