diff --git a/boards/uniboard2a/designs/unb2a_minimal/build/README.txt b/boards/uniboard2a/designs/unb2a_minimal/build/README.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9e93e775e89fcf6ea9296505bdcac4a98e8a1e8d
--- /dev/null
+++ b/boards/uniboard2a/designs/unb2a_minimal/build/README.txt
@@ -0,0 +1,7 @@
+This directory contains the following files:
+
+unb2a_minimal.rbf
+unb2a_minimal.sof
+
+-> The .rbf is generated from the .sof file.
+-> This .rbf also contains the bootloader, so it can only be used as a Factory image in the EPCQ flash (starting @ address 0)