This directory contains the source files for the program CHAMBER.
This code converts charmm psf files into AMBER prmtop files allowing
the use of the CHARMM force field in AMBER.

Authors = Mike Crowley (NREL), Mark Williamson (SDSC), Ross Walker (SDSC)

chamber ---- executable for creating amber input files from charmm input files

   INPUT ARGUMENTS:                                 defaults
       -param <input charmm parameter file name>     par_all27_prot_na.prm
       -top   <input charmm topology file name>      top_all27_prot_na.rtf
       -psf   <input charmm psf file name>           psf.psf
       -crd   <input charmm coords file name>        chmpdb.pdb
              This can be a pdb, crd or rst file - format is auto detected.
       -p     <output amber prmtop file name>        prmtop
       -inpcrd <output amber inpcrd file name>       inpcrd

main.f ------ driver for chamber

psfprm.f ----- reads psf and paramaters translates to amber data structure

write_prmtop.f ---- writes the prmtop from the data structures

mkexcl.f --------- creates exclusion list

sort.f ----------- generic sort routine

