--- MITgcm/doc/README	1998/07/08 15:24:05	1.9
+++ MITgcm/doc/README	1998/07/16 16:58:32	1.12
@@ -1,4 +1,4 @@
-$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/README,v 1.9 1998/07/08 15:24:05 cnh Exp $
+$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/README,v 1.12 1998/07/16 16:58:32 cnh Exp $
 
 
 MITgcmUV Getting Started
@@ -32,7 +32,7 @@
 
      cd bin
      ../tools/genmake 
-     cp Makefile.alpha Makefile
+     cp Makefile.alpha Makefile                  ( On Alpha machine)
 
   3. Now create header file dependency entries
      make depend
@@ -45,10 +45,12 @@
   
   6. Run baseline test case
      setenv PARALLEL 1
-     dmpirun -np 2 ../exe/mitgcmuv
+     dmpirun -np 2 ../exe/mitgcmuv        ( Under Digital UNIX   )
+     mpirun.p4shmem ../exe/mitgcmuv -np 2 ( Under Solaris + mpich)
+                                                      
 
      This runs a 4 degree global ocean climatological simulation.
-     By default this code is set to use two porcessors splitting
+     By default this code is set to use two processors splitting
      the model domain along the equator. Textual output is written
      to files STDOUT.* and STDERR.* with one file for each process.
      Model fileds are written to files suffixed .data and .meta
@@ -82,6 +84,29 @@
 
   - Parallel execution. Hybrid
 
+o Cutomising the code
+
+  Model structure
+  ===============
+  The "numerical" model is contained within a execution 
+  environment support wrapper. This wrapper is designed 
+  to provide a general framework for grid-point models.
+  MITgcmUV is a specific numerical model that uses the
+  framework.
+   Under this structure the model is split into 
+  execution environment support code and conventional
+  numerical model code. The execution environment
+  support code is held under the "eesupp" directory.
+  The grid point model code is held under the 
+  "model" directory. 
+   Code execution actually starts in the eesupp 
+  routines and not in the model routines. For this
+  reason the top level main.F is in the eesupp/src
+  directory. End-users should not need to worry about
+  this level. The top-level routine for the numerical
+  part of the code is in model/src/the_model_main.F.
+
+
 o References
   Web sites - HP
   for doc     Digital