diff --git a/js/x11/core/ext/xc-misc.js b/js/x11/core/ext/xc-misc.js
new file mode 100644
index 0000000..17e20a1
--- /dev/null
+++ b/js/x11/core/ext/xc-misc.js
@@ -0,0 +1,70 @@
+// http://www.x.org/releases/X11R7.6/doc/xcmiscproto/xc-misc.pdf
+
+var x11 = Require('x11/core/x11');
+// TODO: move to templates
+
+exports.requireExt = function(display, callback)
+{
+    var X = display.client;
+    X.QueryExtension('XC-MISC', function(err, ext) {
+
+        if (!ext.present)
+            return callback(new Error('extension not available'));
+
+        ext.QueryVersion = function(clientMaj, clientMin, cb)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSSS', [ext.majorOpcode, 0, 2, clientMaj, clientMin]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var res = buf.unpack('SS');
+                    return res;
+                },
+                cb
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.GetXIDRange = function(cb)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCS', [ext.majorOpcode, 1, 1]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var res = buf.unpack('LL');
+                    return {
+                        startId: res[0],
+                        count: res[1]
+                    };
+                },
+                cb
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.GetXIDList = function( count, cb )
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSL', [ext.majorOpcode, 2, 2, count]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var numIds = buf.unpack('L')[0];
+                    var res = [];
+                    for (var i = 0; i < numIds; ++i)
+                        res.push(buf.unpack('L', 24+i*4));
+                    return res;
+                },
+                cb
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.QueryVersion(1, 1, function(err, vers) {
+            if (err)
+                return callback(err);
+            ext.major = vers[0];
+            ext.minor = vers[1];
+            callback(null, ext);
+        });
+    });
+}