diff --git a/README.md b/README.md
index 28dbb78..89322fb 100644
--- a/README.md
+++ b/README.md
@@ -249,6 +249,38 @@ NOT detach or quit the terminal while your historical operating system is runnin
 this will kill the PiDP-11 simh emulator right away. First run down your historical operating
 system and simh properly, before detaching the terminal emulator!
 
+**Using tek4010 with a serial link**
+
+Teunis van Beelen has written a helper program to use tek4010 with a serial link. This is beta-test
+software at the moment. Feedback to rricharz77@gmail.com is very much appreciated.
+
+First, install the helper program. The helper program is on gitlab, not github.
+
+        cd
+        git clone git://gitlab.com/Teuniz/rs232-console
+	cd rs232-console
+        make
+        
+Put a copy of the executable file rs232-console somewhere where your shell will find it, for example
+in /home/pi/bin or /usr/bin.
+
+Test the serial connection to your host using rs232-console with
+
+        rs232-console <-p port> <-b baudrate> <-m mode> <-f hardware>
+        
+Details of the command line parameters of rs232-console can be found in its README file.
+
+Once this works, you can use it with tek4010 as follows:
+
+        ./tek4010 [options of tek4010] rs232-console [options of rs232-console]
+        
+It has happened that the serial port remained locked after tek4010 is quit. I think this has
+been fixed, but if it still happens, please report details to rricharz77@gmail.com, and use,
+
+        pkill rs232-console
+        
+to kill any still running rs232-console process and unlock the serial port.
+
 **Options of the command tek4010**
 
 Call the command tek4010 using the following syntax:
@@ -413,6 +445,8 @@ terminal such as the spacelab antenna system in pltfiles/ICEMD_pltfiles are very
 The storage tube emulator and the Tektronix 4010/4014 decoder were witten by Rene Richarz.
 The ARDS decoder was written by Lars Brinkhoff. He also provided some interesting historical documents
 and the ARDS plot files.
+Teunis van Beelen has written the helper program "rs232-console" to connect to a host
+using a serial link.
 The historical plot data for the Tektronix 4014 was obtained from Jos Dreesen.
 The historical plot data of the spacelab from the ICEMDDN CAD package on a CDC Cyber 175 mainframe
 emulator was obtained from Nick Glazzard. He also helped to improve the GIN mode substantially.
diff --git a/tek4010 b/tek4010
index a32f7a1..d2e0422 100755
Binary files a/tek4010 and b/tek4010 differ
diff --git a/tube.c b/tube.c
index 5774281..3b796cf 100755
--- a/tube.c
+++ b/tube.c
@@ -280,7 +280,7 @@ void tube_init(int argc, char* argv[])
         char *argv2[20];
         size_t bufsize = 127;
         int firstArg = 1;
-        printf("tek4010 version 1.4.3\n");
+        printf("tek4010 version 1.4.4\n");
         windowName = "Tektronix 4010/4014 emulator";
         if ((argc<2) || (argc>19)) {
                 printf("Error:number of arguments\n");
@@ -498,10 +498,11 @@ int tube_clicked(int button, int x, int y)
 }
 
 void tube_quit()
-// is called if the main window is called bevore the tek4010 exits
+// is called if the main window is quit bevore the tek4010 exits
 // put any code here which needs to be called on exit
 {
         pclose(getData);
+        system("pkill rs232-console");
 }
 
 void tube_doCursor(cairo_t *cr2)
diff --git a/versions.txt b/versions.txt
index 0ee697e..ccf24e9 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,3 +1,7 @@
+Version 1.4.4 August 20, 2019
+=============================
+- Added description on how to connect to the host using a serial connection
+
 Version 1.4.3 August 12, 2019
 =============================
 - Properly ignores characters echoed by the host in GIN mode (normally no characters should be echoed)