diff --git a/scripts/update_from_ref.sh b/scripts/update_from_ref.sh
new file mode 100644
index 0000000..7925ec7
--- /dev/null
+++ b/scripts/update_from_ref.sh
@@ -0,0 +1,42 @@
+#! /usr/bin/env bash
+
+#  update_from_ref.sh
+#  published as part of https://github.com/pConst/basic_verilog
+#  Konstantin Pavlov, pavlovconst@gmail.com
+#
+#  Updates all copies of files to the last reference version
+
+
+cd ..
+pp=$(pwd)
+
+
+# $1 - reference file
+update () {
+
+  find . -type f -name $(basename -- "$1") -print0 | while IFS= read -r -d '' fp; do
+    fpr=$(readlink -f $fp)
+
+    if [ "$fpr" != "$1" ]; then
+
+      echo -n $fpr
+
+      if cmp -s $1 $fpr; then
+        echo "  - OK"
+      else
+        echo "  - DIFFER"
+      fi
+
+    fi
+
+  done
+}
+
+
+echo $pp
+echo "========================================================================="
+update $pp/scripts/clean_vivado.bat
+
+echo "========================================================================="
+update $pp/scripts/clean_quartus.bat
+