diff --git a/tcl/sicstcldebug.tcl b/tcl/sicstcldebug.tcl
new file mode 100644
index 00000000..0815f409
--- /dev/null
+++ b/tcl/sicstcldebug.tcl
@@ -0,0 +1,38 @@
+#------------------------------------------------------------------
+# This is a helper file in order to debug SICS Tcl scripts. The idea
+# is that a connection to a SICS interpreter at localhost:2911 is opened.
+# Then unknown is reimplemented to send unknown commands (which must be
+# SICS commands) to the SICS interpreter for evaluation. This is done
+# with transact in order to figure out when SICS finished processing.
+# Thus is should be possible to debug SICS Tcl scripts in a normal
+# standalone interpreter without the overhead of restarting SICS
+# all the time. It may even be possible to use one of the normal
+# Tcl debugfgers then....
+#
+# Mark Koennecke, February 2006
+#------------------------------------------------------------------
+
+set socke [socket localhost 2911]
+gets $socke
+puts $socke "Spy 007"
+flush $socke
+gets $socke
+#------------------------------------------------------------------
+proc unknown args {
+	global socke
+	append com "transact " [join $args]
+	puts $socke $com
+	flush $socke
+	while {1} {
+		set line [gets $socke]
+		if {[string first TRANSACTIONFINISHED $line] >= 0} {
+			return $reply
+		} else {
+			append reply $line
+		}
+	}
+}
+#------------------------------------------------------------------
+proc clientput args {
+	puts stdout [join $args]
+}