== Windows machines ==

Single-processor machines need the following:

 * Cygwin - ROMS_SED works fine on Windows-based machines, but it really helps to use Cygwin
 * [wiki:SvnStuff SVN] client - You can use the command-line interface in Cygwin, or a GUI client like TortoiseSVN
 * netCDF - Required.

If you want to do coupling (e.g., waves with SWAN), you also need

 * MPICH

Also, you need a Fortran compiler. We have experience with

 * [wiki:GnuFortran gfortran] (Fortran 95 compiler which is a part of GCC compiler collection)
 * g95 Gnu Fortran (based on gcc compiler)
 * df Compaq/Digital (no longer being distributed)
 * ifort Intel

And a really handy tool is [wiki:WinMerge WinMerge]

'''What you need to do'''
 * Install and configure [wiki:Cygwin Cygwin]
 * Install svn
 * Install netCDF libraries
 * Get a copy of the code
 * Edit the makefile
 * Type make to compile
 * Type ./oceanS < ROMS/External/ocean_upwelling.in

On a Windows desktop with a two single processors, and hyperthreading turned on, you can set:
{{{export OMP_NUM_THREADS = 4}}}

Edit {{{makefile}}} to compile with
{{{
USE_OpenMP ?= on
...
FORT ?= ifort
}}}


Edit {{{./ROMS/External/ocean_upwelling.in}}} and set
{{{
NtileI == 2
NtileJ == 2
}}}
and then run {{{./oceanO < ROMS/External/ocean_upwelling.in }}}
But Rich says that it might be faster to set it as 1 x 4, or even 3 x 20 (because with OpenMP, the tiling is not limited to the actual number of processes.