*DECK DDJAC1
      SUBROUTINE DDJAC1 (T, Y, YPRIME, PD, CJ, RPAR, IPAR)
C***BEGIN PROLOGUE  DDJAC1
C***SUBSIDIARY
C***PURPOSE  First Jacobian evaluator for DDASQC.
C***LIBRARY   SLATEC (DASSL)
C***TYPE      DOUBLE PRECISION (SDJAC1-S, DDJAC1-D)
C***AUTHOR  PETZOLD, LINDA R., (LLNL)
C***SEE ALSO  DDASQC
C***ROUTINES CALLED  (NONE)
C***REVISION HISTORY  (YYMMDD)
C   891013  DATE WRITTEN
C   901001  Converted prologue to 4.0 format and made all argument
C           declarations explicit.  (FNF)
C***END PROLOGUE  DDJAC1
      INTEGER  IPAR(*)
      DOUBLE PRECISION  T, Y(*), YPRIME(*), PD(2,2), CJ, RPAR(*)
C***FIRST EXECUTABLE STATEMENT  DDJAC1
      PD(1,1) = CJ + 10.0D0
      PD(1,2) = 0.0D0
      PD(2,1) = 1.0D0
      PD(2,2) = 1.0D0
      RETURN
      END