diff --git a/src/main.c b/src/main.c
index 331bf89..e66d205 100644
--- a/src/main.c
+++ b/src/main.c
@@ -140,10 +140,16 @@ static void do_drawing(cairo_t *cr, GtkWidget *widget)
 
 	cairo_set_source_surface(cr, permanent_surface, windowWidthOffset, windowHeightOffset);
 	cairo_paint(cr);
-	cairo_set_operator(cr, CAIRO_OPERATOR_LIGHTEN);
-    cairo_set_source_surface(cr, temporary_surface, windowWidthOffset, windowHeightOffset);
-	cairo_paint(cr);
-	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+        if (argFast) {
+                cairo_set_source_surface(cr, temporary_surface, windowWidthOffset, windowHeightOffset);
+                cairo_paint(cr);
+        }
+        else {
+                cairo_set_operator(cr, CAIRO_OPERATOR_LIGHTEN);
+                cairo_set_source_surface(cr, temporary_surface, windowWidthOffset, windowHeightOffset);
+                cairo_paint(cr);
+                cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+        }
          
 	cairo_destroy(permanent_cr);
         cairo_destroy(temporary_cr);
diff --git a/src/tube.c b/src/tube.c
index c4b2604..334225c 100755
--- a/src/tube.c
+++ b/src/tube.c
@@ -83,6 +83,7 @@ int argAutoClear = 0;
 int argKeepSize = 0;
 int argHideCursor = 0;
 int argWait = 0;
+int argFast = 0;
 
 int refresh_interval;           // after this time in msec next refresh is done
 
@@ -290,7 +291,7 @@ void tube_init(int argc, char* argv[])
         char *argv2[20];
         size_t bufsize = 127;
         int firstArg = 1;
-        printf("tek4010 version 1.8\n");
+        printf("tek4010 version 1.9\n");
         windowName = "Tektronix 4010/4014 emulator";
         if ((argc<2) || (argc>19)) {
                 printf("Error:number of arguments\n");
@@ -348,6 +349,10 @@ void tube_init(int argc, char* argv[])
                         argARDS = 1;
                         windowName = "ARDS emulator";
                 }
+                else if (strcmp(argv[firstArg],"-fast") == 0) {
+                        printf("Fast refresh without fading\n");
+                        argFast = 1;
+                }
                 else if (strcmp(argv[firstArg],"-wait") == 0) {
                         argWait = 3;
                         if (firstArg < argc-2) {
@@ -586,11 +591,19 @@ void tube_clearPersistent(cairo_t *cr, cairo_t *cr2)
 void tube_clearSecond(cairo_t *cr2)
 // clear second surface
 { 
-        cairo_set_source_rgba(cr2, 0, 0, 0, FADE);
-        cairo_set_operator(cr2, CAIRO_OPERATOR_MULTIPLY);
-        cairo_paint(cr2);
-        cairo_set_operator(cr2, CAIRO_OPERATOR_OVER);
-        isBrightSpot = 1;
+        if (argFast) {
+                cairo_set_source_rgba(cr2, 0, 0, 0, 0);
+                cairo_set_operator(cr2, CAIRO_OPERATOR_SOURCE);
+                cairo_paint(cr2);
+                cairo_set_operator(cr2, CAIRO_OPERATOR_OVER);
+        }
+        else {
+                cairo_set_source_rgba(cr2, 0, 0, 0, FADE);
+                cairo_set_operator(cr2, CAIRO_OPERATOR_MULTIPLY);
+                cairo_paint(cr2);
+                cairo_set_operator(cr2, CAIRO_OPERATOR_OVER);
+                isBrightSpot = 1;
+        }
 }
 
 void tube_line_type(cairo_t *cr, cairo_t *cr2, enum LineType ln)
diff --git a/src/tube.h b/src/tube.h
index 6f83fa8..e039e50 100755
--- a/src/tube.h
+++ b/src/tube.h
@@ -21,6 +21,7 @@ extern int argAutoClear;
 extern int argKeepSize;
 extern int argHideCursor;
 extern int argWait;
+extern int argFast;
 
 extern int hDotsPerChar;
 extern int vDotsPerChar;
diff --git a/versions.txt b/versions.txt
index 1fbdde7..2674123 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,3 +1,7 @@
+Version 1.9 March 18, 2024
+==========================
+Added -fast option without fading for slower computers
+
 Version 1.8 March 4, 2024
 =========================
 Improved bright spot with proper fading