diff --git a/src/emu/video.c b/src/emu/video.c
index ed1fc210059..69ec5ca4cf9 100644
--- a/src/emu/video.c
+++ b/src/emu/video.c
@@ -2087,6 +2087,23 @@ void screen_device::configure(int width, int height, const rectangle &visarea, a
 }
 
 
+//-------------------------------------------------
+//  reset_origin - reset the timing such that the
+//  given (x,y) occurs at the current time
+//-------------------------------------------------
+
+void screen_device::reset_origin(int beamy, int beamx)
+{
+	// compute the effective VBLANK start/end times
+	m_vblank_end_time = attotime_sub_attoseconds(timer_get_time(machine), beamy * m_scantime + beamx * m_pixeltime);
+	m_vblank_start_time = attotime_sub_attoseconds(m_vblank_end_time, m_vblank_period);
+
+	// re-adjust the scanline 0 and VBLANK timers
+	timer_adjust_oneshot(m_scanline0_timer, time_until_pos(0), 0);
+	timer_adjust_oneshot(m_vblank_begin_timer, time_until_vblank_start(), 0);
+}
+
+
 //-------------------------------------------------
 //  realloc_screen_bitmaps - reallocate bitmaps
 //  and textures as necessary
diff --git a/src/emu/video.h b/src/emu/video.h
index 8ffcc82537a..c49a6dd5ead 100644
--- a/src/emu/video.h
+++ b/src/emu/video.h
@@ -160,6 +160,7 @@ public:
 
 	// dynamic configuration
 	void configure(int width, int height, const rectangle &visarea, attoseconds_t frame_period);
+	void reset_origin(int beamy = 0, int beamx = 0);
 	void set_visible_area(int min_x, int max_x, int min_y, int max_y);
 
 	// beam positioning and state
diff --git a/src/emu/video/mc6845.c b/src/emu/video/mc6845.c
index 3b38f5ddb43..92b521c580e 100644
--- a/src/emu/video/mc6845.c
+++ b/src/emu/video/mc6845.c
@@ -651,6 +651,9 @@ static TIMER_CALLBACK( line_timer_cb )
 			mc6845->line_enable_ff = 1;
 			/* also update the cursor state now */
 			update_cursor_state(mc6845);
+
+			if (mc6845->screen != NULL)
+				mc6845->screen->reset_origin();
 		}
 		else
 		{