diff --git a/configs/sim/README.txt b/configs/sim/README.txt
index 323f579b9b26af53457f850a4dd463840ea93dfb..511a3b80f81a6b8e9669a1725423aa4c7ca06871 100644
--- a/configs/sim/README.txt
+++ b/configs/sim/README.txt
@@ -1,13 +1,12 @@
 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