doc changes

documentation/MW100Doc.html

@@ -173,30 +173,46 @@ <h2><i>mw100_probe</i></h2>
   generate automatically a substitutions
   file <b>auto_mw100.substitutions</b> and an autosave
   file <b>auto_mw100.req</b>.
-
-  The simplest way to load the database associated with a populated
-  MW100 is by using an autogenerated substitutions file.  This is done
-  by running the <i>mw100_probe</i> program that is built from code
-  included with the module.  It creates a substitutions file that can
+  The substitutions file that can
   be loaded at boot time or flattened by <i>msi</i> into a database
   file.
 </p>
-
-<p><b>not finished</b></p>
+<p>
+  To use it, one needs values for: the IP address of the instrument;
+  the desired IOC PV prefix, <b>P</b>; the desired IOC PV
+  name, <b>DAU</b>; and the handle that will be given to the driver
+  for this instrument, <b>HANDLE</b>.  The help can be seen by running
+  <i>mw100_probe</i> with no arguments.
+</p>
+<p>
+  The resultant substitutions file will have entries for all the
+  hardware channels, as well as all the constant channels and 60 (out
+  of 300) of both the calculation and communication channels.  In the
+  future, an option will be added to changing the number of
+  communication and calculation channels included.
+</p>
 
 <h2>Database Loading</h2>
 
 <p>
-  The simplest way to load the database associated with a populated
-  MW100 is by using the autogenerated substitutions file.
+  The simplest way to load databases associated with a populated MW100
+  is by using the autogenerated substitutions file
+  from <i>mw100_probe</i>.
 </p>
 <p>
-  The substitutions file references database file using a relative path
-  off of the <b>YOKOGAWA_DAS</b> variable, which needs to be set
+  This substitutions file references the
+  database files using a relative path off of the <b>YOKOGAWA_DAS</b>
+  variable, which needs to be set to the top of this module's
+  installed directory.  The synApps distribution does this
+  automatically, but it can be done by hand by adding to the startup
+  script (such as st.cmd) before loading the substitutions file a line
+  like this:
+  <pre>epicsEnvSet("YOKOGAWA_DAS", "/my/path/to/YOKOGAWA_DAS")</pre>
 </p>
-
-<p><b>not finished</b></p>
 
+<p>To load the substitutions file, in the startup script, use
+<pre>dbLoadTemplate("auto_mw100.substitutions")</pre>
+</p>
 
 <h2>MEDM display files</h2>