C
C  *** / B T B U F / ***
C
C  INCORE BUFFER FOR BTREE PAGING BLOCKS
C
      COMMON /BTBUF/ CORE(2560)
      INTEGER CORE
      INTEGER VALUE(3,1)
      EQUIVALENCE (CORE(1),VALUE(1,1))
      REAL RVALUE(3,1)
      EQUIVALENCE (CORE(1),RVALUE(1,1))
C
C  VARIABLE DEFINITIONS:
C  BTREE NODES ARE ARRANGED IN THREE WORD GROUPS
C     VALUE---ROW 1 - ARRAY OF BTREE KEY VALUES
C     VALUE---ROW 2 - ARRAY OF BTREE NODE POINTERS AND TUPLE
C                     POINTERS
C     VALUE---ROW 3 - ARRAY OF MOT TUPLE POINTERS
C
C  MOT TABLES ARE ARRANGED IN TWO WORD PAIRS
C     ROW 1 - MOT POINTER TO NEXT LINK
C     ROW 2 - TUPLE POINTER
C