diff --git a/src/mame/drivers/darius.c b/src/mame/drivers/darius.c
index aa741cc5261..17b9ec163d3 100644
--- a/src/mame/drivers/darius.c
+++ b/src/mame/drivers/darius.c
@@ -676,9 +676,9 @@ static const gfx_layout char2layout =
 };
 
 static GFXDECODE_START( darius )
-	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,   0, 256 )  /* sprites */
-	GFXDECODE_ENTRY( "gfx1", 0, charlayout,   0, 256 )  /* scr tiles */
-	GFXDECODE_ENTRY( "gfx3", 0, char2layout,  0, 256 )  /* top layer scr tiles */
+	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,   0, 128 )  /* sprites */
+	GFXDECODE_ENTRY( "gfx1", 0, charlayout,   0, 128 )  /* scr tiles */
+	GFXDECODE_ENTRY( "gfx3", 0, char2layout,  0, 128 )  /* top layer scr tiles */
 GFXDECODE_END
 
 
@@ -764,7 +764,7 @@ static MACHINE_CONFIG_START( darius, darius_state )
 
 	/* video hardware */
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", darius)
-	MCFG_PALETTE_ADD("palette", 4096*2)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
 	MCFG_DEFAULT_LAYOUT(layout_darius)
 
diff --git a/src/mame/drivers/opwolf.c b/src/mame/drivers/opwolf.c
index 86f4153543f..8e8adca6040 100644
--- a/src/mame/drivers/opwolf.c
+++ b/src/mame/drivers/opwolf.c
@@ -666,13 +666,13 @@ static const gfx_layout tilelayout_b =
 };
 
 static GFXDECODE_START( opwolf )
-	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,  0, 256 )   /* sprites */
-	GFXDECODE_ENTRY( "gfx1", 0, charlayout,  0, 256 )   /* scr tiles */
+	GFXDECODE_ENTRY( "gfx2", 0, tilelayout,  0, 128 )   /* sprites */
+	GFXDECODE_ENTRY( "gfx1", 0, charlayout,  0, 128 )   /* scr tiles */
 GFXDECODE_END
 
 static GFXDECODE_START( opwolfb )
-	GFXDECODE_ENTRY( "gfx2", 0, tilelayout_b,  0, 256 ) /* sprites */
-	GFXDECODE_ENTRY( "gfx1", 0, charlayout_b,  0, 256 ) /* scr tiles */
+	GFXDECODE_ENTRY( "gfx2", 0, tilelayout_b,  0, 128 ) /* sprites */
+	GFXDECODE_ENTRY( "gfx1", 0, charlayout_b,  0, 128 ) /* scr tiles */
 GFXDECODE_END
 
 
@@ -704,7 +704,7 @@ static MACHINE_CONFIG_START( opwolf, opwolf_state )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", opwolf)
-	MCFG_PALETTE_ADD("palette", 8192)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xxxxRRRRGGGGBBBB)
 
 	MCFG_DEVICE_ADD("pc080sn", PC080SN, 0)
@@ -770,7 +770,7 @@ static MACHINE_CONFIG_START( opwolfb, opwolf_state ) /* OSC clocks unknown for t
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", opwolfb)
-	MCFG_PALETTE_ADD("palette", 8192)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xxxxRRRRGGGGBBBB)
 
 	MCFG_DEVICE_ADD("pc080sn", PC080SN, 0)
diff --git a/src/mame/drivers/rainbow.c b/src/mame/drivers/rainbow.c
index 9d3e275e6ad..b62cd0eaecc 100644
--- a/src/mame/drivers/rainbow.c
+++ b/src/mame/drivers/rainbow.c
@@ -646,7 +646,7 @@ static MACHINE_CONFIG_START( rbisland, rbisland_state )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", rbisland)
-	MCFG_PALETTE_ADD("palette", 8192)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
 
 	MCFG_DEVICE_ADD("pc080sn", PC080SN, 0)
@@ -697,7 +697,7 @@ static MACHINE_CONFIG_START( jumping, rbisland_state )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", jumping)
-	MCFG_PALETTE_ADD("palette", 8192)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xxxxBBBBGGGGRRRR)
 
 	MCFG_VIDEO_START_OVERRIDE(rbisland_state,jumping)
diff --git a/src/mame/drivers/rastan.c b/src/mame/drivers/rastan.c
index 0b0af4f9e01..1b431ebc9ba 100644
--- a/src/mame/drivers/rastan.c
+++ b/src/mame/drivers/rastan.c
@@ -376,7 +376,7 @@ static MACHINE_CONFIG_START( rastan, rastan_state )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", rastan)
-	MCFG_PALETTE_ADD("palette", 8192)
+	MCFG_PALETTE_ADD("palette", 2048)
 	MCFG_PALETTE_FORMAT(xBBBBBGGGGGRRRRR)
 
 	MCFG_DEVICE_ADD("pc080sn", PC080SN, 0)
diff --git a/src/mame/drivers/slapshot.c b/src/mame/drivers/slapshot.c
index 3173bee068f..501fcb3bb75 100644
--- a/src/mame/drivers/slapshot.c
+++ b/src/mame/drivers/slapshot.c
@@ -446,7 +446,7 @@ static const gfx_layout slapshot_charlayout =
 
 static GFXDECODE_START( slapshot )
 	GFXDECODE_ENTRY( "gfx2", 0x0, tilelayout,  0, 256 ) /* sprite parts */
-	GFXDECODE_ENTRY( "gfx1", 0x0, slapshot_charlayout,  0, 256 )    /* sprites & playfield */
+	GFXDECODE_ENTRY( "gfx1", 0x0, slapshot_charlayout, 4096, 256 )    /* sprites & playfield */
 GFXDECODE_END
 
 
@@ -514,7 +514,7 @@ static MACHINE_CONFIG_START( slapshot, slapshot_state )
 	MCFG_TC0480SCP_OFFSETS(30 + 3, 9)
 	MCFG_TC0480SCP_OFFSETS_TX(-1, -1)
 	MCFG_TC0480SCP_OFFSETS_FLIP(0, 2)
-	MCFG_TC0480SCP_COL_BASE(256)
+	MCFG_TC0480SCP_COL_BASE(4096)
 	MCFG_TC0480SCP_GFXDECODE("gfxdecode")
 	MCFG_TC0480SCP_PALETTE("palette")
 
@@ -575,7 +575,7 @@ static MACHINE_CONFIG_START( opwolf3, slapshot_state )
 	MCFG_TC0480SCP_OFFSETS(30 + 3, 9)
 	MCFG_TC0480SCP_OFFSETS_TX(-1, -1)
 	MCFG_TC0480SCP_OFFSETS_FLIP(0, 2)
-	MCFG_TC0480SCP_COL_BASE(256)
+	MCFG_TC0480SCP_COL_BASE(4096)
 	MCFG_TC0480SCP_GFXDECODE("gfxdecode")
 	MCFG_TC0480SCP_PALETTE("palette")
 
diff --git a/src/mame/drivers/taito_f2.c b/src/mame/drivers/taito_f2.c
index d31a7951db7..db2e04b8721 100644
--- a/src/mame/drivers/taito_f2.c
+++ b/src/mame/drivers/taito_f2.c
@@ -2792,17 +2792,27 @@ static const gfx_layout footchmpbl_tilelayout =
 	RGN_FRAC(1,4),
 	4,  /* 4 bits per pixel */
 	{ RGN_FRAC(0,4), RGN_FRAC(1,4),RGN_FRAC(2,4),RGN_FRAC(3,4) },
-	{ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 },
-	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16, 8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16 },
+	{ STEP16(0,1) },
+	{ STEP16(0,16) },
 	16*16   /* every sprite takes 128 consecutive bytes */
 };
 
+static const gfx_layout footchmpbl_charlayout =
+{
+	8,8,  /* 16*16 sprites */
+	256,  /* the ROMs are mostly empty */
+	4,  /* 4 bits per pixel */
+	{ RGN_FRAC(0,4), RGN_FRAC(1,4),RGN_FRAC(2,4),RGN_FRAC(3,4) },
+	{ STEP8(0,1) },
+	{ STEP8(0,8) },
+	8*8   /* every sprite takes 128 consecutive bytes */
+};
 
 static GFXDECODE_START( footchmpbl )
 	GFXDECODE_ENTRY( "gfx2", 0, footchmpbl_tilelayout,  0, 256 )    /* sprites & playfield */
 	GFXDECODE_ENTRY( "gfx1", 0, footchmpbl_tilelayout,  0, 256 )    /* sprites & playfield */
-	GFXDECODE_ENTRY( "gfx3", 0, footchmpbl_tilelayout,  0, 256 )    // gets wiped out by the dynamic decode atm
-	GFXDECODE_ENTRY( "gfx3", 0, footchmpbl_tilelayout,  0, 256 )    // bootleg should clearly use this instead of the uploaded tiles
+	GFXDECODE_ENTRY( "gfx3", 0, footchmpbl_charlayout,  0, 256 )    // gets wiped out by the dynamic decode atm
+	GFXDECODE_ENTRY( "gfx3", 0, footchmpbl_charlayout,  0, 256 )    // bootleg should clearly use this instead of the uploaded tiles
 GFXDECODE_END
 
 
@@ -3417,7 +3427,7 @@ static MACHINE_CONFIG_DERIVED( metalb, taito_f2_tc0510nio )
 	MCFG_TC0480SCP_OFFSETS(0x32 + 3, -0x04)
 	MCFG_TC0480SCP_OFFSETS_TX(1, 0)
 	MCFG_TC0480SCP_OFFSETS_FLIP(-1, 0)
-	MCFG_TC0480SCP_COL_BASE(256)
+	MCFG_TC0480SCP_COL_BASE(4096)
 	MCFG_TC0480SCP_GFXDECODE("gfxdecode")
 	MCFG_TC0480SCP_PALETTE("palette")
 
diff --git a/src/mame/drivers/topspeed.c b/src/mame/drivers/topspeed.c
index 6da48253882..06c2d938794 100644
--- a/src/mame/drivers/topspeed.c
+++ b/src/mame/drivers/topspeed.c
@@ -516,7 +516,7 @@ static const gfx_layout charlayout =
 
 static GFXDECODE_START( topspeed )
 	GFXDECODE_ENTRY( "gfx2", 0x0, tile16x8_layout,  0, 256 )    // Sprite parts
-	GFXDECODE_ENTRY( "gfx1", 0x0, charlayout,  0, 256 )         // Sprites & playfield
+	GFXDECODE_ENTRY( "gfx1", 0x0, charlayout,  0, 512 )         // Sprites & playfield
 	// Road Lines gfxdecodable ?
 GFXDECODE_END
 
diff --git a/src/mame/includes/darius.h b/src/mame/includes/darius.h
index 2a901c25549..66515a5eaa4 100644
--- a/src/mame/includes/darius.h
+++ b/src/mame/includes/darius.h
@@ -124,7 +124,6 @@ public:
 	UINT32 screen_update_darius_middle(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_darius_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	void darius_postload();
-	inline void actual_get_fg_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum );
 	void draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, int primask, int x_offs, int y_offs );
 	UINT32 update_screen(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int xoffs);
 	void parse_control(  )   /* assumes Z80 sandwiched between 68Ks */;
diff --git a/src/mame/includes/ninjaw.h b/src/mame/includes/ninjaw.h
index 5942e1d7d83..e99c7bce423 100644
--- a/src/mame/includes/ninjaw.h
+++ b/src/mame/includes/ninjaw.h
@@ -70,7 +70,6 @@ public:
 	DECLARE_WRITE16_MEMBER(tc0100scn_triple_screen_w);
 	virtual void machine_start();
 	virtual void machine_reset();
-	virtual void video_start();
 	UINT32 screen_update_ninjaw_left(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_ninjaw_middle(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_ninjaw_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
diff --git a/src/mame/includes/warriorb.h b/src/mame/includes/warriorb.h
index fd81c7c2f30..84b99ea0057 100644
--- a/src/mame/includes/warriorb.h
+++ b/src/mame/includes/warriorb.h
@@ -64,7 +64,6 @@ public:
 	DECLARE_WRITE16_MEMBER(tc0100scn_dual_screen_w);
 	virtual void machine_start();
 	virtual void machine_reset();
-	virtual void video_start();
 	UINT32 screen_update_warriorb_left(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_warriorb_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	void reset_sound_region();
diff --git a/src/mame/video/darius.c b/src/mame/video/darius.c
index a0a9e47029b..a4bae112cb1 100644
--- a/src/mame/video/darius.c
+++ b/src/mame/video/darius.c
@@ -3,26 +3,22 @@
 
 /***************************************************************************/
 
-inline void darius_state::actual_get_fg_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum )
-{
-	UINT16 code = (ram[tile_index + 0x2000] & 0x7ff);
-	UINT16 attr = ram[tile_index];
-
-	SET_TILE_INFO_MEMBER(gfxnum,
-			code,
-			((attr & 0xff) << 2),
-			TILE_FLIPYX((attr & 0xc000) >> 14));
-}
-
 TILE_GET_INFO_MEMBER(darius_state::get_fg_tile_info)
 {
-	actual_get_fg_tile_info(tileinfo, tile_index, m_fg_ram, 2);
+	UINT16 code = (m_fg_ram[tile_index + 0x2000] & 0x7ff);
+	UINT16 attr = m_fg_ram[tile_index];
+
+	SET_TILE_INFO_MEMBER(2,
+			code,
+			(attr & 0x7f),
+			TILE_FLIPYX((attr & 0xc000) >> 14));
 }
 
 /***************************************************************************/
 
 void darius_state::video_start()
 {
+	m_gfxdecode->gfx(2)->set_granularity(16);
 	m_fg_tilemap = &machine().tilemap().create(m_gfxdecode, tilemap_get_info_delegate(FUNC(darius_state::get_fg_tile_info),this),TILEMAP_SCAN_ROWS,8,8,128,64);
 
 	m_fg_tilemap->set_transparent_pen(0);
diff --git a/src/mame/video/ninjaw.c b/src/mame/video/ninjaw.c
index 80b4aa415fd..8a1162dbc13 100644
--- a/src/mame/video/ninjaw.c
+++ b/src/mame/video/ninjaw.c
@@ -1,14 +1,6 @@
 #include "emu.h"
 #include "includes/ninjaw.h"
 
-/**********************************************************/
-
-void ninjaw_state::video_start()
-{
-	/* Ensure palette from correct TC0110PCR used for each screen */
-	m_tc0100scn_1->set_colbanks(0x0, 0x100, 0x200);
-}
-
 /************************************************************
             SPRITE DRAW ROUTINE
 ************************************************************/
diff --git a/src/mame/video/tc0080vco.c b/src/mame/video/tc0080vco.c
index 60350e3a0f1..9083f894f9b 100644
--- a/src/mame/video/tc0080vco.c
+++ b/src/mame/video/tc0080vco.c
@@ -191,7 +191,7 @@ void tc0080vco_device::device_start()
 	m_scroll_ram    = m_ram + 0x20800 / 2;
 
 	/* create the char set (gfx will then be updated dynamically from RAM) */
-	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, charlayout, (UINT8 *)m_char_ram, 0, 64, 0)));
+	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, charlayout, (UINT8 *)m_char_ram, 0, 1, 512)));
 
 	save_pointer(NAME(m_ram), TC0080VCO_RAM_SIZE / 2);
 	machine().save().register_postload(save_prepost_delegate(FUNC(tc0080vco_device::postload), this));
@@ -273,8 +273,8 @@ TILE_GET_INFO_MEMBER(tc0080vco_device::get_tx_tile_info)
 
 	SET_TILE_INFO_MEMBER(m_txnum,
 			tile,
-			0x40,
-			0);     /* 0x20<<1 as 3bpp */
+			0,
+			0);
 }
 
 
diff --git a/src/mame/video/tc0100scn.c b/src/mame/video/tc0100scn.c
index 8f1c351df87..ce784c19301 100644
--- a/src/mame/video/tc0100scn.c
+++ b/src/mame/video/tc0100scn.c
@@ -132,11 +132,8 @@ tc0100scn_device::tc0100scn_device(const machine_config &mconfig, const char *ta
 	m_bgscrolly(0),
 	m_fgscrollx(0),
 	m_fgscrolly(0),
-	m_bg_col_mult(0),
 	m_bg_tilemask(0),
-	m_tx_col_mult(0),
 	m_gfxbank(0),
-	m_colbank(0),
 	m_bg0_colbank(0),
 	m_bg1_colbank(0),
 	m_tx_colbank(0),
@@ -257,27 +254,24 @@ void tc0100scn_device::device_start()
 
 	m_bg_tilemask = 0xffff;    /* Mjnquest has 0x7fff tilemask */
 
-	m_bg_col_mult = 1; /* multiplier for when bg gfx != 4bpp */
-	m_tx_col_mult = 1; /* multiplier needed when bg gfx is 6bpp */
-
-	if (m_gfxdecode->gfx(m_gfxnum)->granularity() == 2)    /* Yuyugogo, Yesnoj */
-		m_bg_col_mult = 8;
-
-	if (m_gfxdecode->gfx(m_gfxnum)->granularity() == 0x40) /* Undrfire */
-		m_tx_col_mult = 4;
-
-//logerror("TC0100SCN bg gfx granularity %04x: multiplier %04x\n", m_gfxdecode->gfx(m_gfxnum)->granularity(), m_tx_col_mult);
-
 	m_ram = auto_alloc_array_clear(machine(), UINT16, TC0100SCN_RAM_SIZE / 2);
 
 	set_layer_ptrs();
 
+	/* create the char set (gfx will then be updated dynamically from RAM) */
+	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, tc0100scn_charlayout, (UINT8 *)m_char_ram, NATIVE_ENDIAN_VALUE_LE_BE(8,0), 256, 0)));
+
+	gfx_element *gfx = m_gfxdecode->gfx(m_gfxnum);
+	gfx_element *txt = m_gfxdecode->gfx(m_txnum);
+
+	if (gfx->granularity() == 2)    /* Yuyugogo, Yesnoj */
+		gfx->set_granularity(16);
+
+	txt->set_granularity(gfx->granularity());
+
 	set_colbanks(0, 0, 0);  /* standard values, only Wgp & multiscreen games change them */
 									/* we call this here, so that they can be modified at video_start*/
 
-	/* create the char set (gfx will then be updated dynamically from RAM) */
-	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, tc0100scn_charlayout, (UINT8 *)m_char_ram, NATIVE_ENDIAN_VALUE_LE_BE(8,0), 64, 0)));
-
 	save_pointer(NAME(m_ram), TC0100SCN_RAM_SIZE / 2);
 	save_item(NAME(m_ctrl));
 	save_item(NAME(m_dblwidth));
@@ -292,7 +286,6 @@ void tc0100scn_device::device_start()
 void tc0100scn_device::device_reset()
 {
 	m_dblwidth = 0;
-	m_colbank = 0;
 	m_gfxbank = 0; /* Mjnquest uniquely banks tiles */
 
 	for (int i = 0; i < 8; i++)
@@ -304,11 +297,11 @@ void tc0100scn_device::device_reset()
     DEVICE HANDLERS
 *****************************************************************************/
 
-void tc0100scn_device::common_get_bg0_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth )
+void tc0100scn_device::common_get_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int colbank )
 {
 	int code, attr;
 
-	if (!dblwidth)
+	if (!m_dblwidth)
 	{
 		/* Mahjong Quest (F2 system) inexplicably has a banking feature */
 		code = (ram[2 * tile_index + 1] & m_bg_tilemask) + (m_gfxbank << 15);
@@ -320,62 +313,30 @@ void tc0100scn_device::common_get_bg0_tile_info( tile_data &tileinfo, int tile_i
 		attr = ram[2 * tile_index];
 	}
 
-	SET_TILE_INFO_MEMBER(gfxnum,
+	SET_TILE_INFO_MEMBER(m_gfxnum,
 			code,
-			(((attr * m_bg_col_mult) + m_bg0_colbank) & 0xff) + colbank,
-			TILE_FLIPYX((attr & 0xc000) >> 14));
-}
-
-void tc0100scn_device::common_get_bg1_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth )
-{
-	int code, attr;
-
-	if (!dblwidth)
-	{
-		/* Mahjong Quest (F2 system) inexplicably has a banking feature */
-		code = (ram[2 * tile_index + 1] & m_bg_tilemask) + (m_gfxbank << 15);
-		attr = ram[2 * tile_index];
-	}
-	else
-	{
-		code = ram[2 * tile_index + 1] & m_bg_tilemask;
-		attr = ram[2 * tile_index];
-	}
-
-	SET_TILE_INFO_MEMBER(gfxnum,
-			code,
-			(((attr * m_bg_col_mult) + m_bg1_colbank) & 0xff) + colbank,
-			TILE_FLIPYX((attr & 0xc000) >> 14));
-}
-
-void tc0100scn_device::common_get_tx_tile_info( tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth )
-{
-	int attr = ram[tile_index];
-
-	SET_TILE_INFO_MEMBER(gfxnum,
-			attr & 0xff,
-			((((attr >> 6) & 0xfc) * m_tx_col_mult + (m_tx_colbank << 2)) & 0x3ff) + colbank * 4,
+			((attr + colbank) & 0xff),
 			TILE_FLIPYX((attr & 0xc000) >> 14));
 }
 
 TILE_GET_INFO_MEMBER(tc0100scn_device::get_bg_tile_info)
 {
-	common_get_bg0_tile_info(tileinfo, tile_index, m_bg_ram, m_gfxnum, m_colbank, m_dblwidth);
+	common_get_tile_info(tileinfo, tile_index, m_bg_ram, m_bg0_colbank);
 }
 
 TILE_GET_INFO_MEMBER(tc0100scn_device::get_fg_tile_info)
 {
-	common_get_bg1_tile_info(tileinfo, tile_index, m_fg_ram, m_gfxnum, m_colbank, m_dblwidth);
+	common_get_tile_info(tileinfo, tile_index, m_fg_ram, m_bg1_colbank);
 }
 
 TILE_GET_INFO_MEMBER(tc0100scn_device::get_tx_tile_info)
 {
-	common_get_tx_tile_info(tileinfo, tile_index, m_tx_ram, m_txnum, m_colbank, m_dblwidth);
-}
+	int attr = m_tx_ram[tile_index];
 
-void tc0100scn_device::set_colbank( int col )
-{
-	m_colbank = col;
+	SET_TILE_INFO_MEMBER(m_txnum,
+			attr & 0x00ff,
+			((attr & 0x3f00) >> 8) + m_tx_colbank,
+			TILE_FLIPYX((attr & 0xc000) >> 14));
 }
 
 void tc0100scn_device::set_colbanks( int bg0, int bg1, int tx )
diff --git a/src/mame/video/tc0100scn.h b/src/mame/video/tc0100scn.h
index 244b886146f..84f7f243788 100644
--- a/src/mame/video/tc0100scn.h
+++ b/src/mame/video/tc0100scn.h
@@ -39,10 +39,6 @@ public:
 	To change from the default (0,0,0) use after calling TC0100SCN_vh_start */
 	void set_colbanks(int bg0, int bg1, int tx);
 
-	/* Function to set separate color banks for each TC0100SCN.
-	To change from the default (0,0,0) use after calling TC0100SCN_vh_start */
-	void set_colbank(int colbank);
-
 	/* Function to set bg tilemask < 0xffff */
 	void set_bg_tilemask(int mask);
 
@@ -92,8 +88,8 @@ private:
 	/* We keep two tilemaps for each of the 3 actual tilemaps: one at standard width, one double */
 	tilemap_t      *m_tilemap[3][2];
 
-	int          m_bg_col_mult, m_bg_tilemask, m_tx_col_mult;
-	INT32        m_gfxbank, m_colbank;
+	int          m_bg_tilemask;
+	INT32        m_gfxbank;
 	INT32        m_bg0_colbank, m_bg1_colbank, m_tx_colbank;
 	int          m_dblwidth;
 
@@ -112,9 +108,7 @@ private:
 	TILE_GET_INFO_MEMBER(get_fg_tile_info);
 	TILE_GET_INFO_MEMBER(get_tx_tile_info);
 
-	void common_get_bg0_tile_info(tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth);
-	void common_get_bg1_tile_info(tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth);
-	void common_get_tx_tile_info(tile_data &tileinfo, int tile_index, UINT16 *ram, int gfxnum, int colbank, int dblwidth);
+	void common_get_tile_info(tile_data &tileinfo, int tile_index, UINT16 *ram, int colbank);
 
 	void tilemap_draw_fg(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, tilemap_t* tmap, int flags, UINT32 priority);
 	void set_layer_ptrs();
diff --git a/src/mame/video/tc0480scp.c b/src/mame/video/tc0480scp.c
index 4418ad3c4db..1bc0effc66c 100644
--- a/src/mame/video/tc0480scp.c
+++ b/src/mame/video/tc0480scp.c
@@ -282,7 +282,8 @@ void tc0480scp_device::device_start()
 	set_layer_ptrs();
 
 	/* create the char set (gfx will then be updated dynamically from RAM) */
-	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, tc0480scp_charlayout, (UINT8 *)m_char_ram, NATIVE_ENDIAN_VALUE_LE_BE(8,0), 64, 0)));
+	m_gfxdecode->set_gfx(m_txnum, global_alloc(gfx_element(m_palette, tc0480scp_charlayout, (UINT8 *)m_char_ram, NATIVE_ENDIAN_VALUE_LE_BE(8,0), 64, m_col_base)));
+	m_gfxdecode->gfx(m_gfxnum)->set_colorbase(m_col_base);
 
 	save_item(NAME(m_ram));
 	save_item(NAME(m_ctrl));
@@ -317,7 +318,7 @@ void tc0480scp_device::common_get_tc0480bg_tile_info( tile_data &tileinfo, int t
 	int attr = ram[2 * tile_index];
 	SET_TILE_INFO_MEMBER(gfxnum,
 			code,
-			(attr & 0xff) + m_col_base,
+			(attr & 0xff),
 			TILE_FLIPYX((attr & 0xc000) >> 14));
 }
 
@@ -326,7 +327,7 @@ void tc0480scp_device::common_get_tc0480tx_tile_info( tile_data &tileinfo, int t
 	int attr = ram[tile_index];
 	SET_TILE_INFO_MEMBER(gfxnum,
 			attr & 0xff,
-			((attr & 0x3f00) >> 8) + m_col_base,
+			((attr & 0x3f00) >> 8),
 			TILE_FLIPYX((attr & 0xc000) >> 14));
 }
 
@@ -654,10 +655,6 @@ void tc0480scp_device::tilemap_update()
 TODO
 ----
 
-Broken for any rotation except ROT0. ROT180 support could probably
-be added without too much difficulty: machine_flip is there as a
-place-holder for this purpose.
-
 Wouldn't work if y needs to be > 255 (i.e. if some game uses a
 bigger than usual vertical visible area). Refer to tc0080vco
 custom draw routine for an example of dealing with this.
@@ -709,7 +706,6 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 		int flip = m_pri_reg & 0x40;
 		int i, y, y_index, src_y_index, row_index;
 		int x_index, x_step;
-		int machine_flip = 0;   /* for  ROT 180 ? */
 
 		UINT16 screen_width = 512; //cliprect.width();
 		UINT16 min_y = cliprect.min_y;
@@ -736,10 +732,7 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 			y_index -= (m_y_offset - min_y) * zoomy;
 		}
 
-		if (!machine_flip)
-			y = min_y;
-		else
-			y = max_y;
+		y = min_y;
 
 		do
 		{
@@ -781,12 +774,9 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 			taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 
 			y_index += zoomy;
-			if (!machine_flip)
-				y++;
-			else
-				y--;
+			y++;
 		}
-		while ((!machine_flip && y <= max_y) || (machine_flip && y >= min_y));
+		while (y <= max_y);
 
 	}
 }
@@ -798,10 +788,6 @@ void tc0480scp_device::bg01_draw( screen_device &screen, bitmap_ind16 &bitmap, c
 TODO
 ----
 
-Broken for any rotation except ROT0. ROT180 support could probably
-be added without too much difficulty: machine_flip is there as a
-place-holder for this purpose.
-
 Wouldn't work if y needs to be > 255 (i.e. if some game uses a
 bigger than usual vertical visible area). Refer to tc0080vco
 custom draw routine for an example of dealing with this.
@@ -844,7 +830,6 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 	UINT32 zoomx, zoomy;
 	UINT16 scanline[512];
 	int flipscreen = m_pri_reg & 0x40;
-	int machine_flip = 0;   /* for  ROT 180 ? */
 
 	UINT16 screen_width = 512; //cliprect.width();
 	UINT16 min_y = cliprect.min_y;
@@ -878,11 +863,7 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 		y_index -= (m_y_offset - min_y) * zoomy;
 	}
 
-
-	if (!machine_flip)
 		y = min_y;
-	else
-		y = max_y;
 
 	do
 	{
@@ -944,12 +925,9 @@ void tc0480scp_device::bg23_draw(screen_device &screen, bitmap_ind16 &bitmap, co
 		taitoic_drawscanline(bitmap, cliprect, 0, y, scanline, (flags & TILEMAP_DRAW_OPAQUE) ? 0 : 1, ROT0, screen.priority(), priority);
 
 		y_index += zoomy;
-		if (!machine_flip)
-			y++;
-		else
-			y--;
+		y++;
 	}
-	while ((!machine_flip && y<=max_y) || (machine_flip && y>=min_y));
+	while (y<=max_y);
 }
 
 
diff --git a/src/mame/video/warriorb.c b/src/mame/video/warriorb.c
index 3f0e1968ae4..f245c5beaa4 100644
--- a/src/mame/video/warriorb.c
+++ b/src/mame/video/warriorb.c
@@ -1,15 +1,6 @@
 #include "emu.h"
 #include "includes/warriorb.h"
 
-/**********************************************************/
-
-void warriorb_state::video_start()
-{
-	/* Ensure palette from correct TC0110PCR used for each screen */
-	m_tc0100scn_1->set_colbanks(0x0, 0x100, 0x0);
-}
-
-
 /************************************************************
             SPRITE DRAW ROUTINE
 ************************************************************/