******Program SETMDC******

     This program, and all other NNDC distributed software,  has  been
written  in  standard Fortran 77 so as to be as machine independent as
possible.  However, there are places in the programs where nonstandard
features  of  the fortran language have to be used.  As a result, some
sections of the code are written in a machine dependent  manner.   The
variant  codes  appropriate  for  particular  computers  have all been
included  in  the  program  with  the  inappropriate  code  stored  as
comments.  Program SETMDC will convert programs from one configuration
to another so as to make machine portability as simple as possible.

     1)  Machine Dependent Code Specification Format

              All machine dependent code sections must have  the  same
         format.  each section is headed by:

                  C+++MDC+++

         and trailed by:

                  C---MDC---

              Code for any one machine is headed by one of:

                  C...CDC (SCOPE, NOS)
                  C...IBM (MVS, OS, CMS)
                  C...VAX (VMS)
                  C...ANS (ANSI FORTRAN 77)
                  C...IPC (DOS)

              Code for any two or more machines is headed by a list of
         the  machines,  separated  by  commas,  blanks  after  commas
         optional.
         For example:

                  C...CDC
                  C...IBM, VAX

              SETMDC  shifts  right  all  inappropriate  code  by  two
         columns  and  preceds  them  by  'C/'  in  columns  1  and 2.
         Therefore, all  machine  dependent  code  should  fit  in  70
         columns so that shifting will not shift out good code.

              See program source SETMDC or  other  NNDC  programs  for
         examples of MDC specification.

     2)  No external modules or special instructions are  required  to
         compile and link SETMDC.

     3)  When executed, SETMDC requires;
              INPUT FILE NAME (unit=21)
              OUTPUT FILE NAME (unit=22)
              Machine specification-CDC,IBM,VAX,or IPC