minor changes

7 files changed, 390 insertions, 171 deletions

diff --git a/mixgtk/mixgtk.glade b/mixgtk/mixgtk.glade
index 247d08b..25df994 100644
--- a/mixgtk/mixgtk.glade
+++ b/mixgtk/mixgtk.glade
@@ -47,7 +47,7 @@
       <child>
 	<padding>0</padding>
 	<expand>False</expand>
-	<fill>False</fill>
+	<fill>True</fill>
       </child>
 
       <widget>
@@ -143,6 +143,30 @@
 	  </widget>
 	</widget>
       </widget>
+
+      <widget>
+	<class>GtkMenuItem</class>
+	<name>help</name>
+	<label>_Help</label>
+	<right_justify>True</right_justify>
+
+	<widget>
+	  <class>GtkMenu</class>
+	  <name>help_menu</name>
+
+	  <widget>
+	    <class>GtkMenuItem</class>
+	    <name>about</name>
+	    <signal>
+	      <name>activate</name>
+	      <handler>on_about_activate</handler>
+	      <last_modification_time>Tue, 13 Mar 2001 01:37:20 GMT</last_modification_time>
+	    </signal>
+	    <label>_About...</label>
+	    <right_justify>True</right_justify>
+	  </widget>
+	</widget>
+      </widget>
     </widget>
 
     <widget>
@@ -231,10 +255,9 @@
 	    <name>rA_entry</name>
 	    <x>40</x>
 	    <y>24</y>
-	    <width>118</width>
-	    <height>22</height>
+	    <width>120</width>
+	    <height>24</height>
 	    <can_focus>True</can_focus>
-	    <events>GDK_BUTTON_PRESS_MASK</events>
 	    <signal>
 	      <name>button_press_event</name>
 	      <handler>on_register_click</handler>
@@ -251,8 +274,8 @@
 	    <name>rX_entry</name>
 	    <x>248</x>
 	    <y>24</y>
-	    <width>118</width>
-	    <height>22</height>
+	    <width>120</width>
+	    <height>24</height>
 	    <can_focus>True</can_focus>
 	    <signal>
 	      <name>button_press_event</name>
@@ -598,58 +621,6 @@
 	  </widget>
 
 	  <widget>
-	    <class>GtkScrolledWindow</class>
-	    <name>memory_scroll</name>
-	    <x>392</x>
-	    <y>16</y>
-	    <width>215</width>
-	    <height>248</height>
-	    <hscrollbar_policy>GTK_POLICY_NEVER</hscrollbar_policy>
-	    <vscrollbar_policy>GTK_POLICY_AUTOMATIC</vscrollbar_policy>
-	    <hupdate_policy>GTK_UPDATE_CONTINUOUS</hupdate_policy>
-	    <vupdate_policy>GTK_UPDATE_CONTINUOUS</vupdate_policy>
-
-	    <widget>
-	      <class>GtkCList</class>
-	      <name>memory_cells</name>
-	      <width>200</width>
-	      <height>248</height>
-	      <can_focus>True</can_focus>
-	      <columns>2</columns>
-	      <column_widths>53,135</column_widths>
-	      <selection_mode>GTK_SELECTION_SINGLE</selection_mode>
-	      <show_titles>True</show_titles>
-	      <shadow_type>GTK_SHADOW_IN</shadow_type>
-
-	      <widget>
-		<class>GtkLabel</class>
-		<child_name>CList:title</child_name>
-		<name>label165</name>
-		<label>address</label>
-		<justify>GTK_JUSTIFY_CENTER</justify>
-		<wrap>False</wrap>
-		<xalign>0.5</xalign>
-		<yalign>0.5</yalign>
-		<xpad>0</xpad>
-		<ypad>0</ypad>
-	      </widget>
-
-	      <widget>
-		<class>GtkLabel</class>
-		<child_name>CList:title</child_name>
-		<name>label166</name>
-		<label>contents</label>
-		<justify>GTK_JUSTIFY_CENTER</justify>
-		<wrap>False</wrap>
-		<xalign>0.5</xalign>
-		<yalign>0.5</yalign>
-		<xpad>0</xpad>
-		<ypad>0</ypad>
-	      </widget>
-	    </widget>
-	  </widget>
-
-	  <widget>
 	    <class>GtkEntry</class>
 	    <name>rI5_entry</name>
 	    <x>168</x>
@@ -683,63 +654,6 @@
 	  </widget>
 
 	  <widget>
-	    <class>GtkRadioButton</class>
-	    <name>lesser_radio</name>
-	    <x>264</x>
-	    <y>128</y>
-	    <width>35</width>
-	    <height>24</height>
-	    <can_focus>True</can_focus>
-	    <signal>
-	      <name>toggled</name>
-	      <handler>on_cmp_l_toggled</handler>
-	      <last_modification_time>Tue, 06 Mar 2001 21:21:51 GMT</last_modification_time>
-	    </signal>
-	    <label>L</label>
-	    <active>False</active>
-	    <draw_indicator>True</draw_indicator>
-	    <group>cmp_group</group>
-	  </widget>
-
-	  <widget>
-	    <class>GtkRadioButton</class>
-	    <name>equal_radio</name>
-	    <x>304</x>
-	    <y>128</y>
-	    <width>31</width>
-	    <height>24</height>
-	    <can_focus>True</can_focus>
-	    <signal>
-	      <name>toggled</name>
-	      <handler>on_cmp_e_toggled</handler>
-	      <last_modification_time>Tue, 06 Mar 2001 21:22:04 GMT</last_modification_time>
-	    </signal>
-	    <label>E</label>
-	    <active>False</active>
-	    <draw_indicator>True</draw_indicator>
-	    <group>cmp_group</group>
-	  </widget>
-
-	  <widget>
-	    <class>GtkRadioButton</class>
-	    <name>greater_radio</name>
-	    <x>336</x>
-	    <y>128</y>
-	    <width>32</width>
-	    <height>24</height>
-	    <can_focus>True</can_focus>
-	    <signal>
-	      <name>toggled</name>
-	      <handler>on_cmp_g_toggled</handler>
-	      <last_modification_time>Tue, 06 Mar 2001 21:21:40 GMT</last_modification_time>
-	    </signal>
-	    <label>G</label>
-	    <active>False</active>
-	    <draw_indicator>True</draw_indicator>
-	    <group>cmp_group</group>
-	  </widget>
-
-	  <widget>
 	    <class>GtkLabel</class>
 	    <name>label167</name>
 	    <x>256</x>
@@ -846,6 +760,125 @@
 	    <active>False</active>
 	    <draw_indicator>True</draw_indicator>
 	  </widget>
+
+	  <widget>
+	    <class>GtkScrolledWindow</class>
+	    <name>memory_scroll</name>
+	    <x>398</x>
+	    <y>16</y>
+	    <width>225</width>
+	    <height>248</height>
+	    <hscrollbar_policy>GTK_POLICY_NEVER</hscrollbar_policy>
+	    <vscrollbar_policy>GTK_POLICY_ALWAYS</vscrollbar_policy>
+	    <hupdate_policy>GTK_UPDATE_CONTINUOUS</hupdate_policy>
+	    <vupdate_policy>GTK_UPDATE_CONTINUOUS</vupdate_policy>
+
+	    <widget>
+	      <class>GtkCList</class>
+	      <name>memory_cells</name>
+	      <width>195</width>
+	      <height>248</height>
+	      <tooltip>Click cell to change value</tooltip>
+	      <can_focus>True</can_focus>
+	      <signal>
+		<name>select_row</name>
+		<handler>on_memory_cells_select_row</handler>
+		<after>True</after>
+		<last_modification_time>Tue, 13 Mar 2001 07:38:52 GMT</last_modification_time>
+	      </signal>
+	      <columns>2</columns>
+	      <column_widths>53,135</column_widths>
+	      <selection_mode>GTK_SELECTION_SINGLE</selection_mode>
+	      <show_titles>True</show_titles>
+	      <shadow_type>GTK_SHADOW_IN</shadow_type>
+
+	      <widget>
+		<class>GtkLabel</class>
+		<child_name>CList:title</child_name>
+		<name>label165</name>
+		<label>address</label>
+		<justify>GTK_JUSTIFY_CENTER</justify>
+		<wrap>False</wrap>
+		<xalign>0.5</xalign>
+		<yalign>0.5</yalign>
+		<xpad>0</xpad>
+		<ypad>0</ypad>
+	      </widget>
+
+	      <widget>
+		<class>GtkLabel</class>
+		<child_name>CList:title</child_name>
+		<name>label166</name>
+		<label>contents</label>
+		<justify>GTK_JUSTIFY_CENTER</justify>
+		<wrap>False</wrap>
+		<xalign>0.5</xalign>
+		<yalign>0.5</yalign>
+		<xpad>0</xpad>
+		<ypad>0</ypad>
+	      </widget>
+	    </widget>
+	  </widget>
+
+	  <widget>
+	    <class>GtkRadioButton</class>
+	    <name>lesser_radio</name>
+	    <x>264</x>
+	    <y>128</y>
+	    <width>35</width>
+	    <height>24</height>
+	    <tooltip>Comparison flag: lesser</tooltip>
+	    <can_focus>True</can_focus>
+	    <signal>
+	      <name>toggled</name>
+	      <handler>on_cmp_l_toggled</handler>
+	      <last_modification_time>Tue, 06 Mar 2001 21:21:51 GMT</last_modification_time>
+	    </signal>
+	    <label>L</label>
+	    <active>False</active>
+	    <draw_indicator>True</draw_indicator>
+	    <group>cmp_group</group>
+	  </widget>
+
+	  <widget>
+	    <class>GtkRadioButton</class>
+	    <name>equal_radio</name>
+	    <x>304</x>
+	    <y>128</y>
+	    <width>31</width>
+	    <height>24</height>
+	    <tooltip>Comparison flag: equal</tooltip>
+	    <can_focus>True</can_focus>
+	    <signal>
+	      <name>toggled</name>
+	      <handler>on_cmp_e_toggled</handler>
+	      <last_modification_time>Tue, 06 Mar 2001 21:22:04 GMT</last_modification_time>
+	    </signal>
+	    <label>E</label>
+	    <active>False</active>
+	    <draw_indicator>True</draw_indicator>
+	    <group>cmp_group</group>
+	  </widget>
+
+	  <widget>
+	    <class>GtkRadioButton</class>
+	    <name>greater_radio</name>
+	    <x>336</x>
+	    <y>128</y>
+	    <width>32</width>
+	    <height>24</height>
+	    <tooltip>Comparison flag: greater</tooltip>
+	    <can_focus>True</can_focus>
+	    <signal>
+	      <name>toggled</name>
+	      <handler>on_cmp_g_toggled</handler>
+	      <last_modification_time>Tue, 06 Mar 2001 21:21:40 GMT</last_modification_time>
+	    </signal>
+	    <label>G</label>
+	    <active>False</active>
+	    <draw_indicator>True</draw_indicator>
+	    <group>cmp_group</group>
+	  </widget>
 	</widget>
 
 	<widget>
@@ -863,7 +896,7 @@
 
 	<widget>
 	  <class>GtkScrolledWindow</class>
-	  <name>scrolledwindow28</name>
+	  <name>mixal_scrol</name>
 	  <hscrollbar_policy>GTK_POLICY_AUTOMATIC</hscrollbar_policy>
 	  <vscrollbar_policy>GTK_POLICY_AUTOMATIC</vscrollbar_policy>
 	  <hupdate_policy>GTK_UPDATE_CONTINUOUS</hupdate_policy>
@@ -1061,9 +1094,24 @@
   <class>GtkDialog</class>
   <name>word_dialog</name>
   <visible>False</visible>
+  <signal>
+    <name>destroy</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 00:53:39 GMT</last_modification_time>
+  </signal>
+  <signal>
+    <name>destroy_event</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 00:55:38 GMT</last_modification_time>
+  </signal>
+  <signal>
+    <name>delete_event</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 00:56:33 GMT</last_modification_time>
+  </signal>
   <title>Enter value</title>
   <type>GTK_WINDOW_DIALOG</type>
-  <position>GTK_WIN_POS_NONE</position>
+  <position>GTK_WIN_POS_MOUSE</position>
   <modal>True</modal>
   <default_width>250</default_width>
   <allow_shrink>False</allow_shrink>
@@ -1154,7 +1202,7 @@
 
     <widget>
       <class>GtkFixed</class>
-      <name>fixed3</name>
+      <name>word_layout</name>
       <width>250</width>
       <height>97</height>
       <child>
@@ -1171,6 +1219,7 @@
 	<width>143</width>
 	<height>22</height>
 	<can_focus>True</can_focus>
+	<has_focus>True</has_focus>
 	<signal>
 	  <name>key_press_event</name>
 	  <handler>on_word_dec_key_press</handler>
@@ -1179,8 +1228,8 @@
 	</signal>
 	<editable>True</editable>
 	<text_visible>True</text_visible>
-	<text_max_length>0</text_max_length>
-	<text>-63</text>
+	<text_max_length>11</text_max_length>
+	<text>0</text>
       </widget>
 
       <widget>
@@ -1270,6 +1319,7 @@
 	<y>64</y>
 	<width>22</width>
 	<height>22</height>
+	<can_default>True</can_default>
 	<can_focus>True</can_focus>
 	<signal>
 	  <name>key_press_event</name>
@@ -1289,8 +1339,13 @@
 	<x>88</x>
 	<y>64</y>
 	<width>16</width>
-	<height>22</height>
+	<height>24</height>
 	<can_focus>True</can_focus>
+	<signal>
+	  <name>key_press_event</name>
+	  <handler>on_word_sign_key_press</handler>
+	  <last_modification_time>Tue, 13 Mar 2001 00:15:28 GMT</last_modification_time>
+	</signal>
 	<editable>True</editable>
 	<text_visible>True</text_visible>
 	<text_max_length>1</text_max_length>
@@ -1348,4 +1403,129 @@
   </widget>
 </widget>
 
+<widget>
+  <class>GtkWindow</class>
+  <name>about_dialog</name>
+  <width>368</width>
+  <height>99</height>
+  <visible>False</visible>
+  <signal>
+    <name>delete_event</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 13:13:42 GMT</last_modification_time>
+  </signal>
+  <signal>
+    <name>destroy_event</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 13:14:02 GMT</last_modification_time>
+  </signal>
+  <signal>
+    <name>destroy</name>
+    <handler>gtk_widget_hide</handler>
+    <last_modification_time>Tue, 13 Mar 2001 13:14:25 GMT</last_modification_time>
+  </signal>
+  <title>MDK</title>
+  <type>GTK_WINDOW_DIALOG</type>
+  <position>GTK_WIN_POS_CENTER</position>
+  <modal>True</modal>
+  <allow_shrink>False</allow_shrink>
+  <allow_grow>False</allow_grow>
+  <auto_shrink>False</auto_shrink>
+
+  <widget>
+    <class>GtkLayout</class>
+    <name>layout1</name>
+    <width>375</width>
+    <height>190</height>
+    <area_width>200</area_width>
+    <area_height>120</area_height>
+    <hstep>0</hstep>
+    <vstep>0</vstep>
+
+    <widget>
+      <class>GtkLabel</class>
+      <name>label222</name>
+      <x>56</x>
+      <y>16</y>
+      <width>247</width>
+      <height>16</height>
+      <label>GNU MIX Development Kit</label>
+      <justify>GTK_JUSTIFY_CENTER</justify>
+      <wrap>False</wrap>
+      <xalign>0.5</xalign>
+      <yalign>0.5</yalign>
+      <xpad>0</xpad>
+      <ypad>0</ypad>
+    </widget>
+
+    <widget>
+      <class>GtkLabel</class>
+      <name>version_label</name>
+      <x>152</x>
+      <y>40</y>
+      <width>56</width>
+      <height>16</height>
+      <label>label223</label>
+      <justify>GTK_JUSTIFY_CENTER</justify>
+      <wrap>False</wrap>
+      <xalign>0.5</xalign>
+      <yalign>0.5</yalign>
+      <xpad>0</xpad>
+      <ypad>0</ypad>
+    </widget>
+
+    <widget>
+      <class>GtkLabel</class>
+      <name>label224</name>
+      <x>0</x>
+      <y>64</y>
+      <width>358</width>
+      <height>16</height>
+      <label> Copyright (C) 2001 Free Software Foundation, Inc.</label>
+      <justify>GTK_JUSTIFY_CENTER</justify>
+      <wrap>False</wrap>
+      <xalign>0.5</xalign>
+      <yalign>0.5</yalign>
+      <xpad>0</xpad>
+      <ypad>0</ypad>
+    </widget>
+
+    <widget>
+      <class>GtkHSeparator</class>
+      <name>hseparator4</name>
+      <x>8</x>
+      <y>0</y>
+      <width>356</width>
+      <height>16</height>
+    </widget>
+
+    <widget>
+      <class>GtkHSeparator</class>
+      <name>hseparator5</name>
+      <x>8</x>
+      <y>80</y>
+      <width>356</width>
+      <height>16</height>
+    </widget>
+
+    <widget>
+      <class>GtkVSeparator</class>
+      <name>vseparator4</name>
+      <x>0</x>
+      <y>7</y>
+      <width>16</width>
+      <height>83</height>
+    </widget>
+
+    <widget>
+      <class>GtkVSeparator</class>
+      <name>vseparator5</name>
+      <x>352</x>
+      <y>8</y>
+      <width>16</width>
+      <height>83</height>
+    </widget>
+  </widget>
+</widget>
+
 </GTK-Interface>
diff --git a/mixgtk/mixgtk_input.c b/mixgtk/mixgtk_input.c
index 8f4a777..fa98056 100644
--- a/mixgtk/mixgtk_input.c
+++ b/mixgtk/mixgtk_input.c
@@ -1,7 +1,7 @@
 /* -*-c-*- -------------- mixgtk_input.c :
  * Implementation of the functions declared in mixgtk_input.h
  * ------------------------------------------------------------------
- *  Last change: Time-stamp: "01/03/13 01:27:32 jose"
+ *  Last change: Time-stamp: "01/03/13 08:31:20 jose"
  * ------------------------------------------------------------------
  * Copyright (C) 2001 Free Software Foundation, Inc.
  *  
@@ -21,6 +21,7 @@
  *  
  */
 
+#include <ctype.h>
 #include <stdlib.h>
 #include "mixgtk_widgets.h"
 #include "mixgtk_input.h"
@@ -34,7 +35,6 @@ static const gchar *WGT_NAMES_[SIZE_] = {
   "word_b4", "word_b5", "word_decimal",  "word_reset", "word_ok"
 };
 
-
 static GtkDialog *dialog_;
 static GtkWidget *childs_[SIZE_];
 static input_callback_t callback_;
@@ -53,8 +53,8 @@ mixgtk_input_init (void)
       childs_[k] = mixgtk_widget_factory_get_by_name (WGT_NAMES_[k]);
       g_return_val_if_fail (childs_[k] != NULL, FALSE);
     }
-  
   return TRUE;
+  
 }
 
 static void
@@ -71,7 +71,7 @@ set_word_ (mix_word_t word)
   for (k = 1; k < 6; ++k)
     {
       mix_byte_t b = mix_word_get_byte (word, k);
-      snprintf (BUFFER, SIZE, "%02d", (int)b);
+      snprintf (BUFFER, SIZE, "%d", (int)b);
       gtk_entry_set_text (GTK_ENTRY (childs_[SIGN_ + k]), BUFFER);
     }
 }
@@ -105,32 +105,29 @@ mixgtk_input_short (const gchar *message, mix_short_t def,
   gtk_widget_hide (childs_[B1_]);
   gtk_widget_hide (childs_[B2_]);
   gtk_widget_hide (childs_[B3_]);
-  /*  gtk_widget_draw (GTK_WIDGET (dialog_));*/
 }
 
 #include <gdk/gdkkeysyms.h>
 
 /* dec and bytes input handler */
-void
+gboolean
 on_word_dec_key_press (GtkWidget *dec, GdkEvent *event, gpointer *data)
 {
   GdkEventKey *key = (GdkEventKey *)event;
-  if (key->string && strlen (key->string) > 0)
+  if (key->string && strlen (key->string) > 0 && !iscntrl (key->string[0]))
     {
       gchar *text = gtk_entry_get_text (GTK_ENTRY (childs_[DEC_]));
       gint val = atoi (text);
       set_word_ (mix_word_new (val));
     }
-  if (key->keyval == GDK_KP_Tab || key->keyval == GDK_Tab ||
-      key->keyval == GDK_ISO_Left_Tab)
-    gtk_window_set_focus (GTK_WINDOW (dialog_), childs_[SIGN_]);
+  return FALSE;
 }
 
-void
+gboolean
 on_word_byte_key_press (GtkWidget *widget, GdkEvent *event, gpointer *data)
 {
   GdkEventKey *key = (GdkEventKey *)event;
-  if (key->string && strlen (key->string) > 0)
+  if (key->string && strlen (key->string) > 0 && !iscntrl (key->string[0]))
     {
       mix_byte_t bytes[5];
       gint k;
@@ -147,20 +144,14 @@ on_word_byte_key_press (GtkWidget *widget, GdkEvent *event, gpointer *data)
       if (s && s[0] == '-') mix_word_reverse_sign (w);
       set_word_ (w);
     }
-  if (key->keyval == GDK_KP_Tab || key->keyval == GDK_Tab ||
-      key->keyval == GDK_ISO_Left_Tab)
-    {
-      gint k = 0;
-      while (widget != childs_[k]) ++k;
-      gtk_window_set_focus (GTK_WINDOW (dialog_), childs_[(k + 1)%SIZE_]);
-    }
+  return FALSE;
 }
 
-void
+gboolean
 on_word_sign_key_press (GtkWidget *widget, GdkEvent *event, gpointer *data)
 {
   GdkEventKey *key = (GdkEventKey *)event;
-  if (key->string && strlen (key->string) > 0)
+  if (key->string && strlen (key->string) > 0 && !iscntrl (key->string[0]))
     {
       gchar s = key->string[0];
       gchar *txt = gtk_entry_get_text (GTK_ENTRY (childs_[SIGN_]));
@@ -173,9 +164,7 @@ on_word_sign_key_press (GtkWidget *widget, GdkEvent *event, gpointer *data)
 	  set_word_ (mix_word_negative (w));
 	}
     }
-  if (key->keyval == GDK_KP_Tab || key->keyval == GDK_Tab ||
-      key->keyval == GDK_ISO_Left_Tab)
-    gtk_window_set_focus (GTK_WINDOW (dialog_), childs_[B1_]);
+  return FALSE;
 }
 
 void
@@ -198,8 +187,3 @@ on_word_reset_clicked (GtkWidget *w, gpointer *data)
 {
   set_word_ (MIX_WORD_ZERO);
 }
-
-
-
-  
-      
diff --git a/mixgtk/mixgtk_mixvm.c b/mixgtk/mixgtk_mixvm.c
index 1ef32a5..c90b453 100644
--- a/mixgtk/mixgtk_mixvm.c
+++ b/mixgtk/mixgtk_mixvm.c
@@ -1,7 +1,7 @@
 /* -*-c-*- -------------- mixgtk_mixvm.c :
  * Implementation of the functions declared in mixgtk_mixvm.h
  * ------------------------------------------------------------------
- *  Last change: Time-stamp: "01/03/13 00:24:56 jose"
+ *  Last change: Time-stamp: "01/03/13 23:14:00 jose"
  * ------------------------------------------------------------------
  * Copyright (C) 2001 Free Software Foundation, Inc.
  *  
@@ -39,21 +39,25 @@ static GtkLabel *laptime_;
 static GtkLabel *progtime_;
 static GtkLabel *uptime_;
 static mix_vm_t *vm_;
-
+static GtkTooltips *tips_;
 
 static void
 update_register_ (mixgtk_widget_id_t reg)
 {
   static gchar BUFFER[20];
+  mix_word_t tipval = MIX_WORD_ZERO;
   switch (reg)
     {
     case MIXGTK_WIDGET_rA:
-      mix_word_print_to_buffer (mix_vm_get_rA (vm_), BUFFER);
+      tipval = mix_vm_get_rA (vm_);
+      mix_word_print_to_buffer (tipval, BUFFER);
       break;
     case MIXGTK_WIDGET_rX:
-      mix_word_print_to_buffer (mix_vm_get_rX (vm_), BUFFER);
+      tipval = mix_vm_get_rX (vm_);
+      mix_word_print_to_buffer (tipval, BUFFER);
       break;
     case MIXGTK_WIDGET_rJ:
+      tipval = mix_short_to_word_fast (mix_vm_get_rJ (vm_));
       mix_short_print_to_buffer (mix_vm_get_rJ (vm_), BUFFER);
       break;
     case MIXGTK_WIDGET_rI1:
@@ -62,14 +66,22 @@ update_register_ (mixgtk_widget_id_t reg)
     case MIXGTK_WIDGET_rI4:
     case MIXGTK_WIDGET_rI5:
     case MIXGTK_WIDGET_rI6:
-      mix_short_print_to_buffer (mix_vm_get_rI (vm_,
-						reg - MIXGTK_WIDGET_rI1 + 1),
-				 BUFFER);
+      {
+	gint k = reg - MIXGTK_WIDGET_rI1 + 1;
+	tipval = mix_short_to_word_fast (mix_vm_get_rI (vm_, k));
+	mix_short_print_to_buffer (mix_vm_get_rI (vm_, k), BUFFER);
+      }
       break;
     default:
       g_assert_not_reached ();
     }
   gtk_entry_set_text (reg_entries_[reg - MIXGTK_WIDGET_rA], BUFFER);
+  snprintf (BUFFER, 20, "%s%ld", mix_word_is_negative (tipval)? "-" : "",
+	    mix_word_magnitude (tipval));
+  gtk_tooltips_set_tip (tips_,
+			GTK_WIDGET (reg_entries_[reg - MIXGTK_WIDGET_rA]),
+			BUFFER, NULL);
+
 }
 
 
@@ -92,6 +104,8 @@ mixgtk_mixvm_init (mix_vm_t *vm)
   g_return_val_if_fail (vm != NULL, FALSE);
   vm_ = vm;
 
+  tips_ = gtk_tooltips_new ();
+
   for (k = 0; k < REGISTER_NO_; ++k)
     {
       reg_entries_[k] =
@@ -323,7 +337,7 @@ register_i_ (mix_word_t w, gpointer reg)
   update_register_ (MIXGTK_WIDGET_rI1 - 1 + GPOINTER_TO_INT (reg));
 }
 
-void
+gboolean
 on_register_click (GtkWidget *w, GdkEvent *e, gpointer data)
 {
   enum {SIZE = 20};
@@ -348,4 +362,25 @@ on_register_click (GtkWidget *w, GdkEvent *e, gpointer data)
 	  break;
 	}
     }
+  return FALSE;
+}
+
+static void
+mem_cell_ (mix_word_t w, gpointer a)
+{
+  mix_short_t addr = mix_short_new (GPOINTER_TO_INT (a));
+  mix_vm_set_addr_contents (vm_, addr, w);
+  mixgtk_mixvm_update_cells ();
+}
+
+void
+on_memory_cells_select_row (GtkCList *w, gint row, gint col,
+			    GdkEvent *e, gpointer data)
+{
+  enum {SIZE = 20};
+  static gchar BUFFER[SIZE];
+  snprintf (BUFFER, SIZE, "Memory cell no. %d", row);
+  mixgtk_input_word (BUFFER,
+		     mix_vm_get_addr_contents (vm_, mix_short_new (row)),
+		     mem_cell_, GINT_TO_POINTER (row));
 }
diff --git a/mixgtk/mixgtk_widgets.c b/mixgtk/mixgtk_widgets.c
index 3ff6436..5a2cd91 100644
--- a/mixgtk/mixgtk_widgets.c
+++ b/mixgtk/mixgtk_widgets.c
@@ -1,7 +1,7 @@
 /* -*-c-*- -------------- mixgtk_widgets.c :
  * Implementation of the functions declared in mixgtk_widgets.h
  * ------------------------------------------------------------------
- *  Last change: Time-stamp: "01/03/09 22:29:47 jose"
+ *  Last change: Time-stamp: "01/03/13 14:09:05 jose"
  * ------------------------------------------------------------------
  * Copyright (C) 2001 Free Software Foundation, Inc.
  *  
@@ -22,9 +22,10 @@
  */
 
 
-#include "mixgtk_widgets.h"
 
 #include <glade/glade.h>
+#include <mixlib/mix.h>
+#include "mixgtk_widgets.h"
 
 /* the glade spec */
 static GladeXML *xml_ = NULL;
@@ -33,6 +34,7 @@ static GladeXML *xml_ = NULL;
 static const gchar *names_[] = {
   "main_window",
   "word_dialog",
+  "about_dialog",
   "command_prompt",
   "command_log",
   "mixal_clist",
@@ -61,17 +63,28 @@ static const gchar *names_[] = {
 
 #define WIDGET_NO_ (sizeof (names_) / sizeof (names_[0]))
 
+#define VERSION_LABEL_ "version_label"
+#define GPL_TEXT_ "gpl_text"
 
+GtkWidget *about_;
 
 /* create a new factory from an xml glade file */
 gboolean
 mixgtk_widget_factory_init (const char *glade_file)
 {
+  GtkWidget *label;
   glade_init ();
   xml_ = glade_xml_new (glade_file, NULL);
   if (!xml_) return FALSE;
   glade_xml_signal_autoconnect (xml_);
   
+  about_ = mixgtk_widget_factory_get (MIXGTK_WIDGET_ABOUT_DIALOG);
+  g_return_val_if_fail (about_ != NULL, FALSE);
+  label = mixgtk_widget_factory_get_by_name (VERSION_LABEL_);
+  g_return_val_if_fail (label != NULL, FALSE);
+  gtk_label_set_text (GTK_LABEL(label), VERSION);
+  gtk_widget_show (label);
+  g_print ("%s", VERSION);
   return TRUE;
 }
 
@@ -90,4 +103,9 @@ mixgtk_widget_factory_get_by_name (const gchar *name)
   return glade_xml_get_widget (xml_, name);
 }
 
-
+/* about box */
+void
+on_about_activate (GtkWidget *w, gpointer data)
+{
+  gtk_widget_show (about_);
+}
diff --git a/mixgtk/mixgtk_widgets.h b/mixgtk/mixgtk_widgets.h
index e457518..43b1426 100644
--- a/mixgtk/mixgtk_widgets.h
+++ b/mixgtk/mixgtk_widgets.h
@@ -1,7 +1,7 @@
 /* -*-c-*- ---------------- mixgtk_widgets.h :
  * glade-based factory of mixvm widgets
  * ------------------------------------------------------------------
- *  Last change: Time-stamp: <01/03/11 14:07:32 jose>
+ *  Last change: Time-stamp: <01/03/13 10:20:50 jose>
  * ------------------------------------------------------------------
  * Copyright (C) 2001 Free Software Foundation, Inc.
  *  
@@ -32,6 +32,7 @@
 typedef enum {
   MIXGTK_WIDGET_MAIN,		/* main app window */
   MIXGTK_WIDGET_WORD_DIALOG,	/* input dialog for a mix word */
+  MIXGTK_WIDGET_ABOUT_DIALOG,
   MIXGTK_WIDGET_PROMPT,		/* command prompt */
   MIXGTK_WIDGET_LOG,		/* command output */
   MIXGTK_WIDGET_MIXAL,		/* mixal source file */
diff --git a/mixlib/mix.c b/mixlib/mix.c
index db41bf2..305bb65 100644
--- a/mixlib/mix.c
+++ b/mixlib/mix.c
@@ -48,12 +48,12 @@ mix_release_lib (void)
 }
 
 const char *MIX_GPL_LICENSE = 
-"Copyright (C) 2000 Free Software Foundation, Inc.\n" 
-"This program is free software; you can redistribute it and/or modify\n"
+"Copyright (C) 2000, 2001 Free Software Foundation, Inc.\n" 
+"GNU MDK is free software; you can redistribute it and/or modify\n"
 "it under the terms of the GNU General Public License as published by\n"
 "the Free Software Foundation; either version 2 of the License, or\n"
 "(at your option) any later version.\n"
-"This program is distributed in the hope that it will be useful,\n"
+"GNU MDK is distributed in the hope that it will be useful,\n"
 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 "GNU General Public License for more details.\n"
diff --git a/mixlib/mix_types.c b/mixlib/mix_types.c
index 79e0bb6..40246cd 100644
--- a/mixlib/mix_types.c
+++ b/mixlib/mix_types.c
@@ -479,13 +479,14 @@ mix_word_print_to_file (mix_word_t word, const char *message, FILE *f)
 void 
 mix_word_print_to_buffer (mix_word_t word, gchar *buf)
 {
-  guint k;
   g_return_if_fail (buf != NULL);
-  sprintf (buf, "%s ", mix_word_sign (word) == 0 ? "+" : "-");
-  for ( k = 1; k < 6; ++k ) {
-    sprintf (buf + 2 + 3 * (k -1), "%02d ", mix_word_get_byte (word,k));
-  }
-  /* sprintf (buf, "(%010ld)", mix_word_magnitude (word));*/
+  sprintf (buf, "%s %02d %02d %02d %02d %02d",
+	   mix_word_sign (word) == 0 ? "+" : "-",
+	   mix_word_get_byte (word, 1),
+	   mix_word_get_byte (word, 2),
+	   mix_word_get_byte (word, 3),
+	   mix_word_get_byte (word, 4),
+	   mix_word_get_byte (word, 5));
 }
 
 /* Conversions between words and shorts */