diff --git a/src/mess/drivers/gizmondo.c b/src/mess/drivers/gizmondo.c
index a8523b59ae3..9bfc632d0c8 100644
--- a/src/mess/drivers/gizmondo.c
+++ b/src/mess/drivers/gizmondo.c
@@ -198,20 +198,6 @@ static S3C2440_INTERFACE( gizmondo_s3c2440_intf )
 	{ 0 }
 };
 
-VIDEO_START( gizmondo )
-{
-	gizmondo_state *state = machine.driver_data<gizmondo_state>();
-	machine.primary_screen->register_screen_bitmap(state->m_bitmap);
-}
-
-SCREEN_UPDATE_RGB32( gizmondo )
-{
-	gizmondo_state *state = screen.machine().driver_data<gizmondo_state>();
-	state->m_gf4500->render_screen(state->m_bitmap);
-	copybitmap(bitmap, state->m_bitmap, 0, 0, 0, 0, cliprect);
-	return 0;
-}
-
 static MACHINE_CONFIG_START( gizmondo, gizmondo_state )
 	MCFG_CPU_ADD("maincpu", ARM9, 40000000)
 	MCFG_CPU_PROGRAM_MAP(gizmondo_map)
@@ -223,12 +209,10 @@ static MACHINE_CONFIG_START( gizmondo, gizmondo_state )
 	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
 	MCFG_SCREEN_SIZE(320, 240)
 	MCFG_SCREEN_VISIBLE_AREA(0, 320 - 1, 0, 240 - 1)
-	MCFG_SCREEN_UPDATE_STATIC(gizmondo)
+	MCFG_SCREEN_UPDATE_DEVICE("gf4500", gf4500_device, screen_update)
 
 	MCFG_DEFAULT_LAYOUT(layout_lcd)
 
-	MCFG_VIDEO_START(gizmondo)
-
 	MCFG_GF4500_ADD("gf4500")
 
 	MCFG_S3C2440_ADD("s3c2440", 12000000, gizmondo_s3c2440_intf)
diff --git a/src/mess/drivers/ip22.c b/src/mess/drivers/ip22.c
index 7b80c07e8b0..f94406e6483 100644
--- a/src/mess/drivers/ip22.c
+++ b/src/mess/drivers/ip22.c
@@ -1630,17 +1630,6 @@ static const pc_lpt_interface ip22_lpt_config =
 };
 
 
-SCREEN_UPDATE_RGB32( ip22 )
-{
-	ip22_state *state = screen.machine().driver_data<ip22_state>();
-
-	bitmap.fill(get_black_pen(screen.machine()), cliprect);
-	state->m_newport->render_screen(bitmap, cliprect);
-	
-	return 0;
-}
-
-
 static MACHINE_CONFIG_START( ip225015, ip22_state )
 	MCFG_CPU_ADD( "maincpu", R5000BE, 50000000*3 )
 	MCFG_CPU_CONFIG( config )
@@ -1659,7 +1648,7 @@ static MACHINE_CONFIG_START( ip225015, ip22_state )
 	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
 	MCFG_SCREEN_SIZE(1280+64, 1024+64)
 	MCFG_SCREEN_VISIBLE_AREA(0, 1279, 0, 1023)
-	MCFG_SCREEN_UPDATE_STATIC( ip22 )
+	MCFG_SCREEN_UPDATE_DEVICE("newport", newport_video_device, screen_update)
 
 	MCFG_PALETTE_LENGTH(65536)
 
diff --git a/src/mess/video/gf4500.c b/src/mess/video/gf4500.c
index 900e780b7c9..a8619ea7cc6 100644
--- a/src/mess/video/gf4500.c
+++ b/src/mess/video/gf4500.c
@@ -96,7 +96,7 @@ static rgb_t gf4500_get_color_16( UINT16 data )
 	return MAKE_RGB(r, g, b);
 }
 
-void gf4500_device::render_screen( bitmap_rgb32 &bitmap )
+UINT32 gf4500_device::screen_update(screen_device &device, bitmap_rgb32 &bitmap, const rectangle &cliprect)
 {
 	UINT16 *vram = (UINT16 *)(m_data + GF4500_FRAMEBUF_OFFSET / 4);
 	int x, y;
@@ -109,6 +109,7 @@ void gf4500_device::render_screen( bitmap_rgb32 &bitmap )
 		}
 		vram += 1;
 	}
+	return 0;
 }
 
 READ32_MEMBER( gf4500_device::read )
diff --git a/src/mess/video/gf4500.h b/src/mess/video/gf4500.h
index 9b0cdfe78c9..0a4e3299f7e 100644
--- a/src/mess/video/gf4500.h
+++ b/src/mess/video/gf4500.h
@@ -20,7 +20,7 @@ public:
 	DECLARE_READ32_MEMBER( read );
 	DECLARE_WRITE32_MEMBER( write );
 
-	void render_screen(bitmap_rgb32 &bitmap);
+	UINT32 screen_update(screen_device &device, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 
 protected:
 	// device-level overrides
diff --git a/src/mess/video/newport.c b/src/mess/video/newport.c
index 4582bbfdcd7..4f32d6400fb 100644
--- a/src/mess/video/newport.c
+++ b/src/mess/video/newport.c
@@ -207,20 +207,21 @@ void newport_video_device::device_reset()
 }	
 
 
-void newport_video_device::render_screen( bitmap_rgb32 &bitmap, const rectangle &cliprect )
+UINT32 newport_video_device::screen_update(screen_device &device, bitmap_rgb32 &bitmap, const rectangle &cliprect)
 {
 	/* loop over rows and copy to the destination */
-	for (int y = cliprect.min_y; y <= cliprect.max_y; y++ )
+	for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
 	{
 		UINT32 *src = &m_base[1344 * y];
 		UINT32 *dest = &bitmap.pix32(y, cliprect.min_x);
 		
 		/* loop over columns */
-		for (int x = cliprect.min_x; x < cliprect.max_x; x++ )
+		for (int x = cliprect.min_x; x < cliprect.max_x; x++)
 		{
 			*dest++ = (*src++) & 0x00f8f8f8;
 		}
 	}
+	return 0;
 }
 
 
diff --git a/src/mess/video/newport.h b/src/mess/video/newport.h
index 5c3df48958e..4df773e0ac4 100644
--- a/src/mess/video/newport.h
+++ b/src/mess/video/newport.h
@@ -121,7 +121,7 @@ public:
 	DECLARE_READ32_MEMBER( rex3_r );
 	DECLARE_WRITE32_MEMBER( rex3_w );
 	
-	void render_screen(bitmap_rgb32 &bitmap, const rectangle &cliprect);
+	UINT32 screen_update(screen_device &device, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	
 protected:
 	// device-level overrides