*DECK NPREGCN 
USETEXT NIPDEF
USETEXT PARAMS
USETEXT LLCB
USETEXT NCNT
USETEXT NCNB
USETEXT DRHDR 
      PRGM NPREGCN; 
 STARTIMS;
 #
*1DC  NPREGCN 
* 
*     1. PROC NAME                  AUTHOR              DATE
*        NPREGCN                    L.T.NGUYEN          81/10/01
* 
*     2. FUNCTIONAL DESCRIPTION 
*        REGULATING THE CONNECTION
* 
*     3. METHOD USED
*                   NEW        1        2        3
*            OLD
*             1               XXX      HPO      AOR 
* 
*             2               HPI      XXX      AOR 
* 
*             3               ACI      LPI      XXX 
* 
*         HOP = HIGH PRIORITY OUT OF REGULAION I.E. CLEAR NCNBNR
*         AOR = ALL CONNECTION OUT OF REGULATION
*         HPI = HIGH PRIORITY IN REGULATION 
*         ACI = ALL CONNECTIONS IN REGULATION 
*         LPI = LOW PRIORITY IN REGULATION
*         XXX = NOTHING TO DO 
* 
*        DEPENDING ON THE CURRENT BUFFER LEVEL (OLD) AND THE
*        NEW BUFFER LEVEL IN REG/LL SUPERVISOR MESSAGE WE DO
*        ACCORDINGLY TO THE ABOVE MATRIX. 
* 
*     4. ENTRY PARAMETERS:  
*        PARAMS1 = LLCB ADDRESS 
*        PARAMS2 = NEW REGULATION BUFFER LEVEL
*        PARAMS3 = INDICATOR - 0 (LOWERING) NEW =< OLD
*                            - 1 (RAISING) NEW >= OLD 
* 
* 
*     5. EXIT PARAMETER:  
*        NONE.
* 
*     6. COMDECKS CALLED: 
*        NIPDEF 
*        PARAMS 
*        LLCB 
*        NCNT 
*        NCNB 
*        DRHDR
*        OSSIZE 
* 
*     7. ROUTINES AND OVERLAY CALLED
*        NFOB 
* 
*     8. NOTE 
*        CALLED BY NPREGLL. 
*        THIS IS A SECONDARY OVERLAY
*        W A R N I N G - THIS PROGRAM CANNOT EXCEED THE SECONDARY 
*CALL OSSIZE
* 
* 
 #
 STOPIMS; 
# 
  
# 
      ITEM I ;
      ITEM TEMPPTR U ;                 # TEMPORARY POINTER             #
      ITEM DRADDRESS U ;               # DATA RING ADDRESS             #
      ITEM NFOBCALL B ; 
      ITEM LLCBIX U ; 
      ITEM NCNTIX U ; 
      XREF PROC NFOB ;
      XREF LABEL RJMAIN;
      BEGIN                            # NPREGCN                       #
        P<LLCB> = PARAMS1 ; 
        FOR LLCBIX = LLCBHSIZE STEP 1 UNTIL LLCBSIZE - LLCBHSIZE - 1
        DO
          BEGIN 
          P<NCNT> = LLCBNCNT[LLCBIX] ;
          IF P<NCNT> NQ 0 
          THEN
            BEGIN 
            FOR NCNTIX = NCNTHSIZE STEP 1 UNTIL NCNTSIZE-NCNTHSIZE
            DO
              BEGIN 
              NFOBCALL = FALSE ;
              P<NCNB> = NCNTNCNB[NCNTIX] ;
              IF P<NCNB> NQ 0 
              THEN
                BEGIN 
                IF PARAMS3 NQ 0   #      LOWERING     # 
                THEN
                  BEGIN 
                  IF PARAMS2 EQ BUFLSM    # BUFFER LEVEL IS 1 # 
                  THEN
                    NCNBNR = TRUE ; 
                  IF PARAMS2 EQ BUFLHDS     #  BUFFER LEVEL IS 2  # 
                     AND NCNBPRI EQ 2       #  LOW PRIORITY       # 
                  THEN
                    NCNBNR = TRUE ; 
                  END 
                ELSE          #  RAISING   #
                  BEGIN 
                  IF PARAMS2 EQ BUFLHDS      #  BUFFER$LEVEL IS 2  #
                     AND NCNBPRI EQ 1        #  HIGH PRIORITY      #
                  THEN
                    BEGIN 
                    NCNBNR = FALSE ;
                    NFOBCALL = TRUE ; 
                    END 
                  IF PARAMS2 EQ BUFLAM   #  BUFFER LEVEL IS 3  #
                  THEN
                    BEGIN 
                    NCNBNR = FALSE ;
                    NFOBCALL = TRUE ; 
                    END 
                  IF (NFOBCALL) AND  # OKAY TO SEND DOWNLINE DATA      #
                     (NCNBID[0] EQ NCNBIDVALUE)  # THIS IS A NCNB      #
                  THEN
                    BEGIN        # CALL NFOB TO SEND DATA              #
                    FOR I = I WHILE (NCNBNBO[0] LS NCNBDBL[0])
                              AND NCNBDRFP[0] NQ 0
                              AND NOT NCNBHR[0] 
                    DO
                      BEGIN      # FOR LOOP                            #
                      DRADDRESS = NCNBDRFP ;   # ADDRESS FOR NFOB CALL #
                      IF NCNBDRFP NQ NCNBDRBP 
                      THEN
                        BEGIN        # NOT THE LAST NCNB               #
                        P<DRHDRWD> = NCNBDRFP ; 
                        NCNBDRFP   = NEXTPTR ;
                        TEMPPTR    = BACKPTR ;
                        P<DRHDRWD> = NEXTPTR ;
                        BACKPTR    = TEMPPTR ;
                        END          # NOT THE LAST NCNB               #
                      ELSE
                        BEGIN        # THE LAST NCNB                   #
                        NCNBDRFP = 0 ;
                        NCNBDRBP = 0 ;
                        END          # THE LAST NCNB                   #
                      NCNBBLKSQ[0] = NCNBBLKSQ[0] - 1;
  
                      NFOB(DRADDRESS,P<NCNB>) ; 
  
                      END       # FOR LOOP                             #
                    END         # CALL NFOB                            #
                  END 
                END 
              END 
            END 
          END 
        GOTO RJMAIN ; 
      END 
      TERM