update

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1332 42af7a65-404d-4744-a932-0658087f49c3

configs/sim/README.txt

 README
 ^^^^^^
 
-ostest
-
-  The "standard" NuttX examples/ostest configuration.  This
-  configuration may be selected as follows:
+mount
+  Configures to use examples/mount.  This configuration may be
+  selected as follows:
 
     cd <nuttx-directory>/tools
-    ./Configure.sh sim/ostest
+    ./Configure.sh sim/mount
 
 nettest
 
@@ -21,6 +20,28 @@ nettest
   NOTE: The NuttX network is not, however, functional on the TAP
   device yet.
 
+nsh
+  Configures to use the NuttShell at examples/nsh.  This configuration
+  may be selected as follows:
+
+    cd <nuttx-directory>/tools
+    ./Configure.sh sim/nsh
+
+nx
+  Configures to use examples/nx.  This configuration may be
+  selected as follows:
+
+    cd <nuttx-directory>/tools
+    ./Configure.sh sim/nx
+
+ostest
+
+  The "standard" NuttX examples/ostest configuration.  This
+  configuration may be selected as follows:
+
+    cd <nuttx-directory>/tools
+    ./Configure.sh sim/ostest
+
 pashello
 
   Configures to use examples/pashello.  This configuration may