--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README	Tue Jun 02 00:29:51 2015 +0000
@@ -0,0 +1,15 @@
+This is a special debug version of leo2moko intended for use by FreeCalypso
+developers only; it does not provide any additional features for Freerunner
+users beyond standard leo2moko-r1 aka moko12; non-developer users are advised
+to stay with the just-mentioned stable release.
+
+The primary intended use of this debug fw version is to enable FreeCalypso
+developers to troubleshoot misbehavior in our current gcc-built fw version
+by comparing the operation of the fw against a known working reference;
+the debug features added in this version are:
+
+* Same AT-over-RVTMUX mechanism as implemented in FreeCalypso mainline;
+
+* ETM FFS access protocol changed from TMFFS1 (used by some TI Windows tools,
+  apparently) to TMFFS2 (the version adopted for FreeCalypso) to allow the
+  flash file system to be manipulated with fc-fsio while this fw is running.