diff --git a/js/fc.js b/js/fc.js
index a216cce1..4d25ba1d 100644
--- a/js/fc.js
+++ b/js/fc.js
@@ -994,7 +994,30 @@ var FC = {
         }
     },
     getRcMapLetters: function () {
-        return ['A', 'E', 'R', 'T', '5', '6', '7', '8'];
+        if (semver.gte(CONFIG.flightControllerVersion, '1.9.1'))
+            return ['A', 'E', 'R', 'T'];
+        else
+            return ['A', 'E', 'R', 'T', '5', '6', '7', '8'];
+    },
+    isRcMapValid: function (val) {
+        var strBuffer = val.split(''),
+            duplicityBuffer = [];
+
+        if (val.length != FC.getRcMapLetters().length)
+            return false;
+
+        // check if characters inside are all valid, also check for duplicity
+        for (var i = 0; i < val.length; i++) {
+            if (FC.getRcMapLetters().indexOf(strBuffer[i]) < 0)
+                return false;
+
+            if (duplicityBuffer.indexOf(strBuffer[i]) < 0)
+                duplicityBuffer.push(strBuffer[i]);
+            else
+                return false;
+        }
+
+        return true;
     },
     getServoMixInputNames: function () {
         return [
diff --git a/tabs/receiver.html b/tabs/receiver.html
index 958a10ea..f2af3660 100644
--- a/tabs/receiver.html
+++ b/tabs/receiver.html
@@ -25,9 +25,9 @@
                     <input type="text" name="rcmap" spellcheck="false" /> 
                     <select class="hybrid_helper"
                         name="rcmap_helper">
-                        <option value="AETR5678">Default</option>
-                        <option value="AETR5678">Futaba / Hitec</option>
-                        <option value="TAER5678">JR / Spektrum / Graupner</option>
+                        <option value="AETR">Default</option>
+                        <option value="AETR">Futaba / Hitec</option>
+                        <option value="TAER">JR / Spektrum / Graupner</option>
                     </select>
                 </div>
             </div>
diff --git a/tabs/receiver.js b/tabs/receiver.js
index 7ea25775..b95c45d2 100644
--- a/tabs/receiver.js
+++ b/tabs/receiver.js
@@ -77,6 +77,14 @@ TABS.receiver.initialize = function (callback) {
         // translate to user-selected language
         localize();
 
+        if (semver.lt(CONFIG.flightControllerVersion, '1.9.1')) {
+            rcmap_options = $('select[name="rcmap_helper"] option');
+            for (i = 0; i < rcmap_options.length; ++i) {
+                option = rcmap_options[i];
+                option.setAttribute("value", option.getAttribute("value") + "5678");
+            }
+        }
+
         // fill in data from RC_tuning
         $('.tunings .throttle input[name="mid"]').val(RC_tuning.throttle_MID.toFixed(2));
         $('.tunings .throttle input[name="expo"]').val(RC_tuning.throttle_EXPO.toFixed(2));
@@ -152,9 +160,9 @@ TABS.receiver.initialize = function (callback) {
         $(window).on('resize', self.resize).resize(); // trigger so labels get correctly aligned on creation
 
         // handle rcmap & rssi aux channel
-        var strBuffer = [];
+        var strBuffer = [], rcMapLetters = FC.getRcMapLetters();
         for (var i = 0; i < RC_MAP.length; i++) {
-            strBuffer[RC_MAP[i]] = FC.getRcMapLetters()[i];
+            strBuffer[RC_MAP[i]] = rcMapLetters[i];
         }
 
         // reconstruct
@@ -183,29 +191,12 @@ TABS.receiver.initialize = function (callback) {
         });
 
         $rcMap.focusout(function () {
-            var val = $(this).val(),
-                strBuffer = val.split(''),
-                duplicityBuffer = [];
-
-            if (val.length != 8) {
+            if (!FC.isRcMapValid($(this).val()))
                 $(this).val(last_valid);
-                return false;
-            }
+        });
 
-            // check if characters inside are all valid, also check for duplicity
-            for (var i = 0; i < val.length; i++) {
-                if (FC.getRcMapLetters().indexOf(strBuffer[i]) < 0) {
-                    $(this).val(last_valid);
-                    return false;
-                }
-
-                if (duplicityBuffer.indexOf(strBuffer[i]) < 0) {
-                    duplicityBuffer.push(strBuffer[i]);
-                } else {
-                    $(this).val(last_valid);
-                    return false;
-                }
-            }
+        $rcMap.on('input change', function() {
+            $(this).css("color", FC.isRcMapValid($(this).val()) ? "" : "#FF0000");
         });
 
         // handle helper