diff --git a/Documentation/NuttX.html b/Documentation/NuttX.html
index 1bf69dd70bf..cb2fcdda80e 100644
--- a/Documentation/NuttX.html
+++ b/Documentation/NuttX.html
@@ -55,7 +55,8 @@ is available that be used to build a NuttX-compatible arm-elf toolchain.</blockq
 </p>
 <p>
   I have a stripped down OS test for the 8051 target that requires only
-  24Kb.
+  18Kb.  A substantial effort was required to get to this size
+  (see <a href="codesize-070301.xls">spreadsheet</a> for details).
 </p>
 
 <h1>Licensing</h1>
diff --git a/Documentation/codesize-070301.xls b/Documentation/codesize-070301.xls
new file mode 100644
index 00000000000..22fed5abf44
Binary files /dev/null and b/Documentation/codesize-070301.xls differ