diff --git a/src/mame/dataeast/exprraid.cpp b/src/mame/dataeast/exprraid.cpp
index c73fb741681..84c67e7b2c0 100644
--- a/src/mame/dataeast/exprraid.cpp
+++ b/src/mame/dataeast/exprraid.cpp
@@ -213,6 +213,7 @@ Stephh's notes (based on the games M6502 code and some tests) :
 #include "cpu/m6809/m6809.h"
 #include "sound/ymopn.h"
 #include "sound/ymopl.h"
+
 #include "screen.h"
 #include "speaker.h"
 
@@ -561,13 +562,13 @@ ROM_START( exprraid )
 	ROM_LOAD( "cz06.8h", 0x18000, 0x8000, CRC(b9bb448b) SHA1(84974b1f3a5b58cd427d874f805a6dd9244c1101) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cz03.12d", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
+	ROM_LOAD( "cz03.12f", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 
 	ROM_REGION( 0x0400, "plds", 0 )
 	ROM_LOAD( "pal16r4a.5c", 0x0000, 0x0104, CRC(d66aaa87) SHA1(dc29b473238ed6a9de2076c79644b613a9ba6924) )
@@ -600,13 +601,13 @@ ROM_START( exprraidu )
 	ROM_LOAD( "cz06.8h", 0x18000, 0x8000, CRC(b9bb448b) SHA1(84974b1f3a5b58cd427d874f805a6dd9244c1101) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cz03.12d", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
+	ROM_LOAD( "cz03.12f", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 
 	ROM_REGION( 0x0400, "plds", 0 )
 	ROM_LOAD( "pal16r4a.5c", 0x0000, 0x0104, CRC(d66aaa87) SHA1(dc29b473238ed6a9de2076c79644b613a9ba6924) )
@@ -639,13 +640,13 @@ ROM_START( exprraidi ) /* PCB manufactured in Italy by Gecas under Data East lic
 	ROM_LOAD( "cz06.8h", 0x18000, 0x8000, CRC(b9bb448b) SHA1(84974b1f3a5b58cd427d874f805a6dd9244c1101) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cz03.12d", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
+	ROM_LOAD( "cz03.12f", 0x0000, 0x8000, CRC(6ce11971) SHA1(16bfa69b3ad02253e81c8110c9b840be03952790) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 
 	ROM_REGION( 0x0400, "plds", 0 )
 	ROM_LOAD( "pal16r4a.5c", 0x0000, 0x0104, CRC(d66aaa87) SHA1(dc29b473238ed6a9de2076c79644b613a9ba6924) )
@@ -678,13 +679,13 @@ ROM_START( wexpress )
 	ROM_LOAD( "cy06.8h", 0x18000, 0x8000, CRC(c3a56de5) SHA1(aefc516c6c69b12291c0bda03729910181a91a17) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cy03.12d", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
+	ROM_LOAD( "cy03.12f", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 
 	ROM_REGION( 0x0400, "plds", 0 )
 	ROM_LOAD( "pal16r4a.5c",   0x0000, 0x0104, CRC(d66aaa87) SHA1(dc29b473238ed6a9de2076c79644b613a9ba6924) )
@@ -717,13 +718,13 @@ ROM_START( wexpressb1 )
 	ROM_LOAD( "cy06.8h", 0x18000, 0x8000, CRC(c3a56de5) SHA1(aefc516c6c69b12291c0bda03729910181a91a17) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cy03.12d", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
+	ROM_LOAD( "cy03.12f", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 
 	ROM_REGION( 0x0400, "plds", 0 )
 	ROM_LOAD( "pal16r4a.5c",   0x0000, 0x0104, CRC(d66aaa87) SHA1(dc29b473238ed6a9de2076c79644b613a9ba6924) )
@@ -756,13 +757,13 @@ ROM_START( wexpressb2 )
 	ROM_LOAD( "cy06.8h", 0x18000, 0x8000, CRC(c3a56de5) SHA1(aefc516c6c69b12291c0bda03729910181a91a17) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "cy03.12d", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
+	ROM_LOAD( "cy03.12f", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* All 4 proms are Fujitsu MB7114 or compatible */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 ROM_END
 
 ROM_START( wexpressb3 )
@@ -791,33 +792,28 @@ ROM_START( wexpressb3 )
 	ROM_LOAD( "cy06.8h", 0x18000, 0x8000, CRC(c3a56de5) SHA1(aefc516c6c69b12291c0bda03729910181a91a17) )    /* tiles */
 
 	ROM_REGION( 0x8000, "gfx4", 0 )     /* background tilemaps */
-	ROM_LOAD( "3.12d", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
+	ROM_LOAD( "3.12f", 0x0000, 0x8000, CRC(242e3e64) SHA1(4fa8e93ef055bfdbe3bd619c53bf2448e1b832f0) )
 
 	ROM_REGION( 0x0400, "proms", 0 ) /* Proms Weren't Present In This Set, Using the One from the Other */
 	ROM_LOAD( "cy-17.5b", 0x0000, 0x0100, CRC(da31dfbc) SHA1(ac476440864f538918f7bef2e1db82fd19195f89) ) /* red */
 	ROM_LOAD( "cy-16.6b", 0x0100, 0x0100, CRC(51f25b4c) SHA1(bfcca57613fbb22919e00db1f6a8c7ca50faa60b) ) /* green */
 	ROM_LOAD( "cy-15.7b", 0x0200, 0x0100, CRC(a6168d7f) SHA1(0c7b31adcd764ce2631c3fb5c1a968b01f65e741) ) /* blue */
-	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* ??? */
+	ROM_LOAD( "cy-14.9b", 0x0300, 0x0100, CRC(52aad300) SHA1(ff09772b930afa87e28d0628ef85a589a3d149c9) ) /* priority */
 ROM_END
 
 
 void exprraid_state::exprraid_gfx_expand()
 {
 	/* Expand the background rom so we can use regular decode routines */
-
-	uint8_t   *gfx = memregion("gfx3")->base();
+	uint8_t *gfx = memregion("gfx3")->base();
 	int offs = 0x10000 - 0x1000;
-	int i;
 
-
-	for ( i = 0x8000 - 0x1000; i >= 0; i-= 0x1000 )
+	for (int i = 0x8000 - 0x1000; i >= 0; i-= 0x1000)
 	{
 		memcpy(&(gfx[offs]), &(gfx[i]), 0x1000);
-
 		offs -= 0x1000;
 
 		memcpy(&(gfx[offs]), &(gfx[i]), 0x1000);
-
 		offs -= 0x1000;
 	}
 }
diff --git a/src/mame/dataeast/exprraid_v.cpp b/src/mame/dataeast/exprraid_v.cpp
index d10c8fbf27c..7f020a3912b 100644
--- a/src/mame/dataeast/exprraid_v.cpp
+++ b/src/mame/dataeast/exprraid_v.cpp
@@ -18,11 +18,7 @@ void exprraid_state::exprraid_colorram_w(offs_t offset, uint8_t data)
 
 void exprraid_state::exprraid_flipscreen_w(uint8_t data)
 {
-	if (flip_screen() != (data & 0x01))
-	{
-		flip_screen_set(data & 0x01);
-		machine().tilemap().mark_all_dirty();
-	}
+	flip_screen_set(data & 0x01);
 }
 
 void exprraid_state::exprraid_bgselect_w(offs_t offset, uint8_t data)
@@ -91,9 +87,7 @@ void exprraid_state::video_start()
 
 void exprraid_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect )
 {
-	int offs;
-
-	for (offs = 0; offs < m_spriteram.bytes(); offs += 4)
+	for (int offs = 0; offs < m_spriteram.bytes(); offs += 4)
 	{
 		int attr = m_spriteram[offs + 1];
 		int code = m_spriteram[offs + 3] + ((attr & 0xe0) << 3);
@@ -112,18 +106,17 @@ void exprraid_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &clipre
 		}
 
 		m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
-			code, color,
-			flipx, flipy,
-			sx, sy, 0);
-
-		/* double height */
+				code, color,
+				flipx, flipy,
+				sx, sy, 0);
 
+		// double height
 		if (attr & 0x10)
 		{
 			m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
-				code + 1, color,
-				flipx, flipy,
-				sx, sy + (flip_screen() ? -16 : 16), 0);
+					code + 1, color,
+					flipx, flipy,
+					sx, sy + (flip_screen() ? -16 : 16), 0);
 		}
 	}
 }
diff --git a/src/mame/toaplan/toaplan1.cpp b/src/mame/toaplan/toaplan1.cpp
index 3b1c064edb9..90535f41595 100644
--- a/src/mame/toaplan/toaplan1.cpp
+++ b/src/mame/toaplan/toaplan1.cpp
@@ -755,6 +755,7 @@ void toaplan1_samesame_state::main_map(address_map &map)
 	map(0x140008, 0x140009).portr("SYSTEM");
 	map(0x14000b, 0x14000b).r(FUNC(toaplan1_samesame_state::port_6_word_r));    /* Territory, and MCU ready */
 	map(0x14000d, 0x14000d).w(FUNC(toaplan1_samesame_state::coin_w));  /* Coin counter/lockout */
+//  map(0x14000e, 0x14000f).nopr(); // irq ack?
 	map(0x14000f, 0x14000f).w(m_soundlatch, FUNC(generic_latch_8_device::write));   /* Commands sent to HD647180 */
 	map(0x180001, 0x180001).w(FUNC(toaplan1_samesame_state::bcu_flipscreen_w));
 	map(0x180002, 0x180003).rw(FUNC(toaplan1_samesame_state::tileram_offs_r), FUNC(toaplan1_samesame_state::tileram_offs_w));
@@ -935,9 +936,9 @@ void toaplan1_demonwld_state::dsp_program_map(address_map &map)
 
 void toaplan1_demonwld_state::dsp_io_map(address_map &map)
 {
-	map(0, 0).w(FUNC(toaplan1_demonwld_state::dsp_addrsel_w));
-	map(1, 1).rw(FUNC(toaplan1_demonwld_state::dsp_r), FUNC(toaplan1_demonwld_state::dsp_w));
-	map(3, 3).w(FUNC(toaplan1_demonwld_state::dsp_bio_w));
+	map(0x0, 0x0).w(FUNC(toaplan1_demonwld_state::dsp_addrsel_w));
+	map(0x1, 0x1).rw(FUNC(toaplan1_demonwld_state::dsp_r), FUNC(toaplan1_demonwld_state::dsp_w));
+	map(0x3, 0x3).w(FUNC(toaplan1_demonwld_state::dsp_bio_w));
 }
 
 
@@ -989,8 +990,7 @@ u8 toaplan1_state::vimana_tjump_invert_r()
 
 u8 toaplan1_samesame_state::cmdavailable_r()
 {
-	if (m_soundlatch->pending_r()) return 0xff;
-	else return 0x00;
+	return m_soundlatch->pending_r() ? 1 : 0;
 }
 
 void toaplan1_samesame_state::hd647180_io_map(address_map &map)
diff --git a/src/mame/toaplan/toaplan1_m.cpp b/src/mame/toaplan/toaplan1_m.cpp
index f600a192429..de17890a729 100644
--- a/src/mame/toaplan/toaplan1_m.cpp
+++ b/src/mame/toaplan/toaplan1_m.cpp
@@ -142,7 +142,6 @@ void toaplan1_demonwld_state::dsp_ctrl_w(u8 data)
 u8 toaplan1_samesame_state::port_6_word_r()
 {
 	/* Bit 0x80 is secondary CPU (HD647180) ready signal */
-	logerror("PC:%08x Warning !!! IO reading from $14000b\n",m_maincpu->pcbase());
 	return (m_soundlatch->pending_r() ? 0 : 0x80) | m_tjump_io->read();
 }