Add notes about compile error

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2959 42af7a65-404d-4744-a932-0658087f49c3

configs/z16f2800100zcog/README.txt

@@ -37,6 +37,27 @@ two files:  (1) configs/z16f2800100zcog/*/setenv.sh and (2)
 configs/z16f2800100zcog/*/Make.defs.  Simply edit these two files, changing
 4.11.1 to whatever.
 
+Issues
+^^^^^^
+
+There are several, important open issues with the ZNEO port (8 as of this writing).
+See the TODO file in the top-level NuttX directory.  One of these should be
+mentioned here because it causes a failure to compile Nuttx:
+
+  Description: The file drivers/mmcsd/mmcsd_sdio.c generates an internal compiler
+               error like:
+ 
+               mmcsd\mmcsd_sdio.c
+               Internal Error(0503) On line 2524 of "MMCSD\MMCSD_SDIO.C"
+                   File <c3>, Args(562,46)
+
+  Status:     Open.  Recommended workaround: remove mmcsd_sdio.c from
+              drivers/mmcsd/Make.defs.  There is no SDIO support for the Z16 anyway
+  Priority:   Low
+
+This is bug in ZDS-II.  It was discovered in version 4.11.0 and still exists
+in version 4.11.1.
+
 Configuration Subdirectories
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^