integer function pythia6_common_block_address(common_block_name)
c-----------------------------------------------------------------------
c  revision history:
c  -----------------
c *0001 Jun 29 1998 P.Murat: created
c *0002 Apr 30 1999 P.Murat: force loading in the BLOCK DATA
c-----------------------------------------------------------------------
c...#include "stdhep.inc"
#include "pythia.inc"
c
      character*(*) common_block_name
c...      external      pydata
c
c-----------------------------------------------------------------------
      integer       py6_gcaddi
      integer       common_block_address
c-----------------------------------------------------------------------
      common_block_address = 0
c-----------------------------------------------------------------------
c  GEANT common-blocks
c-----------------------------------------------------------------------
      if     (common_block_name.eq."HEPEVT") then
        common_block_address = py6_gcaddi(NEVHEP)
      elseif (common_block_name.eq."PYJETS") then
        common_block_address = py6_gcaddi(N)
      elseif (common_block_name.eq."PYDAT1") then
        common_block_address = py6_gcaddi(MSTU)
      elseif (common_block_name.eq."PYDAT2") then
        common_block_address = py6_gcaddi(KCHG)
      elseif (common_block_name.eq."PYDAT3") then
        common_block_address = py6_gcaddi(MDCY)
      elseif (common_block_name.eq."PYDAT4") then
        common_block_address = py6_gcaddi(CHAF)
      elseif (common_block_name.eq."PYDATR") then
        common_block_address = py6_gcaddi(MRPY)
      elseif (common_block_name.eq."PYSUBS") then
        common_block_address = py6_gcaddi(MSEL)
      elseif (common_block_name.eq."PYPARS") then
        common_block_address = py6_gcaddi(MSTP)
      elseif (common_block_name.eq."PYINT1") then
        common_block_address = py6_gcaddi(MINT)
      elseif (common_block_name.eq."PYINT2") then
        common_block_address = py6_gcaddi(ISET)
      elseif (common_block_name.eq."PYINT3") then
        common_block_address = py6_gcaddi(XSFX)
      elseif (common_block_name.eq."PYINT4") then
        common_block_address = py6_gcaddi(MWID)
      elseif (common_block_name.eq."PYINT5" ) then
        common_block_address = py6_gcaddi(NGENPD)
      elseif (common_block_name.eq."PYINT6" ) then
        common_block_address = py6_gcaddi(PROC)
      elseif (common_block_name.eq."PYINT7") then
        common_block_address = py6_gcaddi(SIGT)
      elseif (common_block_name.eq."PYINT8") then
        common_block_address = py6_gcaddi(XPVMD)
      elseif (common_block_name.eq."PYINT9") then
        common_block_address = py6_gcaddi(VXPVMD)
      elseif (common_block_name.eq."PYUPPR") then
        common_block_address = py6_gcaddi(NUP)
      elseif (common_block_name.eq."PYMSSM") then
        common_block_address = py6_gcaddi(IMSS)
      elseif (common_block_name.eq."PYSSMT") then
        common_block_address = py6_gcaddi(ZMIX)
      elseif (common_block_name.eq."PYINTS") then
        common_block_address = py6_gcaddi(XXM(1))
      elseif (common_block_name.eq."PYBINS") then
        common_block_address = py6_gcaddi(IHIST(1))
      endif
c
      pythia6_common_block_address = common_block_address
      end