C CHAINI    SOURCE    CHAT      05/01/12    21:54:23     5004
      SUBROUTINE CHAINI(A,NMAX,IBOU,NPLEIN,E,DEPSUR,ICAS)
      IMPLICIT INTEGER(I-N)
      IMPLICIT REAL*8(A-H,O-Z)
      DIMENSION E(*),A(NMAX,*)
      DO 1 I=1,IBOU
      DO 1 J=1,IBOU
  1   A(I,J)=0.
      IBOU2=IBOU
      IF(ICAS.EQ.2) IBOU2=IBOU/2
      DO 6 IC=1,ICAS
      IP=(IC-1)*IBOU2
      DUM=E(1)*DEPSUR
      DO 2 I=1,NPLEIN
      IK=I+IP
   2  A(IK,IK)=DUM
      IF(NPLEIN.EQ.1) GO TO 6
      DUM=E(2)*DEPSUR
      DO 3 I=2,NPLEIN
      I1=I-1
      IK=I+IP
      DO 3 J=1,I1
      JK=J+IP
      A(IK,JK)=DUM
   3  A(JK,IK)=DUM
      NP1=NPLEIN+1
      DUM=E(3)*DEPSUR
      DO 4 I=NP1,IBOU2
      IK=I+IP
   4  A(IK,IK)=DUM
   6  CONTINUE
      RETURN
      END