*DECK EXINCSZ 
      PROC EXINCSZ( (ADDSIZE), TSBADDR, TSBN ); 
      BEGIN 
*IF DEF,IMS 
# 
**    EXINCSZ - INCREASE TSB SIZE.
* 
*     M. E. VATCHER  81/03/13 
* 
*     EXINCSZ INCREASES THE SIZE OF AN ASSIGNED TSB.
* 
*     PROC EXINCSZ( (ADDSIZE), TSBADDR, TSBN )
* 
*     ENTRY  ADDSIZE         NUMBER OF ADDITIONAL WORDS REQUESTED 
*            TSBN            TSB NUMBER 
* 
*     EXIT   TSBADDR         ADDRESS OF NON-MOVABLE TSB WITH INCREASED
*                            SIZE 
* 
*     METHOD
* 
*     IF ANYTHING IS WRONG WITH THE ENTRY PARAMETERS, RETURN WITH 
*     TSBADDR = -1.  OTHERWISE GET A NEW BIGGER TSB AND MOVE THE DATA 
*     FROM THE OLD TSB TO THE LOWER ADDRESS PORTION OF THE NEW TSB. 
*     THEN MAKE THE OLD TSB A FREE TSB. 
* 
# 
*ENDIF
      CONTROL NOLIST;        # TSBDEFS, TSBDATA, TSBBASE               #
*CALL CYBERDEFS 
*CALL TSBDEFS 
*CALL TSBDATA 
*CALL TSBBASE 
      CONTROL LIST; 
  
      XREF
        BEGIN 
        PROC ABORT; 
        PROC GETTSB;
        PROC GIVETSB; 
        PROC MOVEI; 
        END 
  
      ITEM ADDSIZE U;        #ADDITIONAL SIZE REQUESTED                #
      ITEM TSBADDR U;        # ADDRESS OF USER AREA OF TSB RETURNED    #
      ITEM TSBN U;           # TSB NUMBER OF TSB WHOSE SIZE IS TO BE   #
                             # INCREASED                               #
      ITEM TSBSIZE U;        # INCREASED TSB SIZE                      #
  
      IF ( NOT TBUSY[TSBN] ) OR ( TSBN GR LENGTH[0] ) OR
        ( TSBN LQ 0 ) 
      THEN                   # TSBN IS ILLEGAL                         #
        BEGIN 
        $BEGIN
        ABORT;
        $END
        TSBADDR = -1;        # NEGATIVE ADDRESS INDICATES REJECT       #
        TSBN = BADTSBN + TSBN;  # BAD TSBN AS PARAMETER                #
        RETURN;              # ***** EXIT *****                        #
  
        END 
      P<BTSBHDR> = TTSBFWA[TSBN];  #SET TSB HEADER TO OLD TSB          #
      TSBSIZE = BTSBL[0] + ADDSIZE;  # SET INCREASED TSB SIZE          #
      IF ( TSBSIZE LQ BTSBL[0] ) OR ( TSBSIZE GR MAXTSBL )
      THEN                   # SIZE IS ILLEGAL                         #
        BEGIN 
        $BEGIN
        ABORT;
        $END
        TSBADDR = -1;        # NEGATIVE ADDRESS INDICATES REJECT       #
        TSBN = BADSIZE;      # BAD REQUEST SIZE ERROR CODE             #
        RETURN;              # ***** EXIT *****                        #
  
        END 
      BNOTMOV[0] = TRUE;     # SET SO IT CANT BE MOVED                 #
      GETTSB(TSBSIZE,TSBN,TSBADDR); # GET A NEW TSB                    #
      P<BTSBHDR> = TTSBFWA[TSBN];  # RESET HEADER ON OLD TSB           #
      TTSBFWA[TSBN] = TSBADDR;  # SET NEW TSB FWA IN TSBIT             #
      TSBADDR = TSBADDR + TSBHDRL;  # ADDRESS OF USER AREA TO USER     #
      MOVEI(BTSBL[0]-TSBHDRL,P<BTSBHDR>+TSBHDRL,TSBADDR);  # MOVE DATA #
      GIVETSB(P<BTSBHDR>); # RETURN OLD TSB                            #
      END TERM # EXINCSZ #