diff --git a/src/mame/drivers/spbactn.c b/src/mame/drivers/spbactn.c
index 722684066f5..c823e93995d 100644
--- a/src/mame/drivers/spbactn.c
+++ b/src/mame/drivers/spbactn.c
@@ -232,9 +232,9 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( spbactnp_extra_map, AS_PROGRAM, 8, spbactn_state )
 	AM_RANGE(0x0000, 0xefff) AM_ROM
-	AM_RANGE(0xc000, 0xc7ff) AM_RAM
+	AM_RANGE(0xc000, 0xc7ff) AM_RAM AM_SHARE("extraram2")
 	AM_RANGE(0xe000, 0xefff) AM_RAM
-	AM_RANGE(0xd000, 0xd1ff) AM_RAM
+	AM_RANGE(0xd000, 0xd1ff) AM_RAM_WRITE( extraram_w ) AM_SHARE("extraram")
 	AM_RANGE(0xd200, 0xd200) AM_RAM
 ADDRESS_MAP_END
 
@@ -428,6 +428,7 @@ static MACHINE_CONFIG_START( spbactn, spbactn_state )
 	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
 	MCFG_SCREEN_SIZE(64*8, 32*8)
 	MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 2*8, 30*8-1)
+	MCFG_VIDEO_START_OVERRIDE(spbactn_state,spbactn)
 	MCFG_SCREEN_UPDATE_DRIVER(spbactn_state, screen_update_spbactn)
 
 	MCFG_GFXDECODE(spbactn)
@@ -460,6 +461,7 @@ static MACHINE_CONFIG_START( spbactnp, spbactn_state )
 	MCFG_CPU_ADD("extracpu", Z80, XTAL_4MHz)
 	MCFG_CPU_PROGRAM_MAP(spbactnp_extra_map)
 	MCFG_CPU_VBLANK_INT_DRIVER("screen", spbactn_state,  irq0_line_hold)
+//	MCFG_CPU_VBLANK_INT_DRIVER("screen", spbactn_state,  nmi_line_pulse)
 
 
 	/* video hardware */
@@ -468,6 +470,7 @@ static MACHINE_CONFIG_START( spbactnp, spbactn_state )
 	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
 	MCFG_SCREEN_SIZE(64*8, 32*8)
 	MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 2*8, 30*8-1)
+	MCFG_VIDEO_START_OVERRIDE(spbactn_state,spbactnp)
 	MCFG_SCREEN_UPDATE_DRIVER(spbactn_state, screen_update_spbactnp)
 
 	MCFG_GFXDECODE(spbactnp)
diff --git a/src/mame/includes/spbactn.h b/src/mame/includes/spbactn.h
index 85b58636c29..fbff93cf10f 100644
--- a/src/mame/includes/spbactn.h
+++ b/src/mame/includes/spbactn.h
@@ -5,22 +5,36 @@ public:
 		: driver_device(mconfig, type, tag) ,
 		m_bgvideoram(*this, "bgvideoram"),
 		m_fgvideoram(*this, "fgvideoram"),
-		m_spvideoram(*this, "spvideoram"){ }
+		m_spvideoram(*this, "spvideoram"),
+		m_extraram(*this, "extraram"),
+		m_extraram2(*this, "extraram2")
+	{ }
 
 	required_shared_ptr<UINT16> m_bgvideoram;
 	required_shared_ptr<UINT16> m_fgvideoram;
 	required_shared_ptr<UINT16> m_spvideoram;
+	optional_shared_ptr<UINT8> m_extraram;
+	optional_shared_ptr<UINT8> m_extraram2;
 
 	tilemap_t    *m_bg_tilemap;
 	tilemap_t    *m_fg_tilemap;
+
+	tilemap_t    *m_extra_tilemap;
+
 	DECLARE_WRITE16_MEMBER(bg_videoram_w);
 	DECLARE_WRITE16_MEMBER(fg_videoram_w);
 	TILE_GET_INFO_MEMBER(get_bg_tile_info);
 	TILE_GET_INFO_MEMBER(get_fg_tile_info);
 
+	DECLARE_WRITE8_MEMBER(extraram_w);
+	TILE_GET_INFO_MEMBER(get_extra_tile_info);
+
+
 
 	bitmap_ind16 m_tile_bitmap_bg;
 	bitmap_ind16 m_tile_bitmap_fg;
+
+
 	DECLARE_WRITE16_MEMBER(soundcommand_w);
 
 	DECLARE_WRITE16_MEMBER( spbatnp_90002_w );
@@ -32,9 +46,11 @@ public:
 	DECLARE_WRITE16_MEMBER( spbatnp_90124_w );
 	DECLARE_WRITE16_MEMBER( spbatnp_9012c_w );
 
-	
+	DECLARE_VIDEO_START(spbactn);
+	DECLARE_VIDEO_START(spbactnp);
 
-	virtual void video_start();
+
+	//virtual void video_start();
 	UINT32 screen_update_spbactn(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_spbactnp(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	int draw_video(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, bool alt_sprites);
diff --git a/src/mame/video/spbactn.c b/src/mame/video/spbactn.c
index bfe239e29b6..bea2625666a 100644
--- a/src/mame/video/spbactn.c
+++ b/src/mame/video/spbactn.c
@@ -155,13 +155,12 @@ TILE_GET_INFO_MEMBER(spbactn_state::get_fg_tile_info)
 
 
 
-void spbactn_state::video_start()
+VIDEO_START_MEMBER(spbactn_state,spbactn)
 {
 	/* allocate bitmaps */
 	machine().primary_screen->register_screen_bitmap(m_tile_bitmap_bg);
 	machine().primary_screen->register_screen_bitmap(m_tile_bitmap_fg);
 
-
 	m_bg_tilemap = &machine().tilemap().create(tilemap_get_info_delegate(FUNC(spbactn_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 16, 8, 64, 128);
 	m_fg_tilemap = &machine().tilemap().create(tilemap_get_info_delegate(FUNC(spbactn_state::get_fg_tile_info),this), TILEMAP_SCAN_ROWS, 16, 8, 64, 128);
 	m_bg_tilemap->set_transparent_pen(0);
@@ -169,7 +168,12 @@ void spbactn_state::video_start()
 
 }
 
-
+VIDEO_START_MEMBER(spbactn_state,spbactnp)
+{
+	VIDEO_START_CALL_MEMBER(spbactn);
+	// no idea..
+	m_extra_tilemap = &machine().tilemap().create(tilemap_get_info_delegate(FUNC(spbactn_state::get_extra_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 16, 16);
+}
 WRITE16_MEMBER( spbactn_state::spbatnp_90002_w )
 {
 	//printf("spbatnp_90002_w %04x\n",data);
@@ -210,6 +214,21 @@ WRITE16_MEMBER( spbactn_state::spbatnp_9012c_w )
 }
 
 
+WRITE8_MEMBER(spbactn_state::extraram_w)
+{
+	COMBINE_DATA(&m_extraram[offset]);
+	m_extra_tilemap->mark_tile_dirty(offset/2);
+}
+
+TILE_GET_INFO_MEMBER(spbactn_state::get_extra_tile_info)
+{
+	int tileno = m_extraram[(tile_index*2)+1];
+	tileno |= m_extraram[(tile_index*2)] << 8;
+	SET_TILE_INFO_MEMBER(3, tileno, 0, 0);
+}
+
+
+
 
 int spbactn_state::draw_video(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, bool alt_sprites)
 {
@@ -244,5 +263,9 @@ UINT32 spbactn_state::screen_update_spbactn(screen_device &screen, bitmap_rgb32
 
 UINT32 spbactn_state::screen_update_spbactnp(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
 {
+	// hack to make the extra cpu do something..
+	m_extraram2[0x104] = machine().rand();
+	m_extraram2[0x105] = machine().rand();
+
 	return draw_video(screen,bitmap,cliprect,true);
 }