diff --git a/src/mame/drivers/konamigx.c b/src/mame/drivers/konamigx.c
index 8428e2f0dc5..926266b7165 100644
--- a/src/mame/drivers/konamigx.c
+++ b/src/mame/drivers/konamigx.c
@@ -1238,9 +1238,11 @@ static ADDRESS_MAP_START( gx_type4_map, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0xe40000, 0xe40003) AM_WRITENOP
 	AM_RANGE(0xe60000, 0xe60fff) AM_RAM AM_BASE((UINT32**)&K053936_1_linectrl)  // 29C & 29G (PSAC2 line control)
 	AM_RANGE(0xe80000, 0xe87fff) AM_RAM_WRITE(konamigx_palette_w) AM_BASE(&paletteram32) // 11G/13G/15G (main screen palette RAM)
-	AM_RANGE(0xea0000, 0xea7fff) AM_RAM_WRITE(konamigx_palette2_w) AM_BASE(&gx_subpaletteram32) // 5G/7G/9G (sub screen palette RAM)
+//	AM_RANGE(0xea0000, 0xea7fff) AM_RAM_WRITE(konamigx_palette2_w) AM_BASE(&gx_subpaletteram32) // 5G/7G/9G (sub screen palette RAM)
+ 	AM_RANGE(0xea0000, 0xea7fff) AM_RAM AM_BASE(&gx_subpaletteram32) // 5G/7G/9G (sub screen palette RAM)
 	AM_RANGE(0xec0000, 0xec0003) AM_READ(type3_sync_r)		// type 4 polls this too
-	AM_RANGE(0xf00000, 0xf07fff) AM_RAM_WRITE(konamigx_t4_psacmap_w) AM_BASE(&gx_psacram)	// PSAC2 tilemap
+//	AM_RANGE(0xf00000, 0xf07fff) AM_RAM_WRITE(konamigx_t4_psacmap_w) AM_BASE(&gx_psacram)	// PSAC2 tilemap
+	AM_RANGE(0xf00000, 0xf07fff) AM_RAM
 	AM_IMPORT_FROM(gx_base_memmap)
 ADDRESS_MAP_END
 
@@ -2245,8 +2247,8 @@ ROM_START( rushhero )
 	ROM_LOAD32_WORD_SWAP( "605b03.29m", 0x200000, 512*1024, CRC(c5b8d31d) SHA1(6c5b359e1fcf511c50d6a876946631fc38a6dade) )
 
 	/* data roms */
-	ROM_LOAD32_WORD_SWAP( "605a04.31r", 0x400000, 1024*1024, CRC(f6788154) SHA1(093c145d5348b4f10193acc258f5539bd59138a1))
-	ROM_LOAD32_WORD_SWAP( "605a05.29r", 0x400002, 1024*1024, CRC(9bca4297) SHA1(c20be1ffcee8bd56f69d4fcc19d0035b3f74b8f2))
+ 	ROM_LOAD32_WORD_SWAP( "605a04.31r", 0x400002, 1024*1024, CRC(f6788154) SHA1(093c145d5348b4f10193acc258f5539bd59138a1))
+	ROM_LOAD32_WORD_SWAP( "605a05.29r", 0x400000, 1024*1024, CRC(9bca4297) SHA1(c20be1ffcee8bd56f69d4fcc19d0035b3f74b8f2))
 
 	/* sound program */
 	ROM_REGION( 0x40000, "soundcpu", 0 )
@@ -2260,18 +2262,18 @@ ROM_START( rushhero )
 
 	/* sprites */
 	ROM_REGION( 0x3000000, "gfx2", ROMREGION_ERASE00 )
-	ROM_LOAD32_WORD( "605a19.14r", 0x0000000, 4*1024*1024, CRC(293427d0) SHA1(c31f93797bda09ea7e990100a5556eb0fde64968) )
-	ROM_LOAD32_WORD( "605a15.18r", 0x0000002, 4*1024*1024, CRC(19e6e356) SHA1(b2568e14d6fb9a9792f95aafcf694dbf00c0d2c8) )
-	ROM_LOAD32_WORD( "605a18.18m", 0x0800000, 4*1024*1024, CRC(b5115d76) SHA1(48c3119afb649c58d4df36806fe5530ddd379782) )
-	ROM_LOAD32_WORD( "605a14.14m", 0x0800002, 4*1024*1024, CRC(4d4dbecb) SHA1(7c3cb2739d6b729d855d652b1991c7af6cd79d1c) )
-	ROM_LOAD32_WORD( "605a13.21r", 0x1000000, 4*1024*1024, CRC(08137923) SHA1(c1af6b55c1c08e16384d2660b2210ccf3b955be9) )
-	ROM_LOAD32_WORD( "605a17.16r", 0x1000002, 4*1024*1024, CRC(42e6dc6f) SHA1(8035b7160267a988a1aa2690423c68b6f1975f1a) )
-	ROM_LOAD32_WORD( "605a12.21m", 0x1800000, 4*1024*1024, CRC(194ffad0) SHA1(1c56f4e89bfe72b435793b907e7ca3e62ecddf4b) )
-	ROM_LOAD32_WORD( "605a16.16m", 0x1800002, 4*1024*1024, CRC(aab542ca) SHA1(9728b028f48768236f47a7a9bddb27944297b583) )
-	ROM_LOAD32_WORD( "605a11.23r", 0x2000000, 4*1024*1024, CRC(bc61339c) SHA1(77a5737501bf8ffd7ae4192a6e5924c479eb6655) )
-	ROM_LOAD32_WORD( "605a10.23m", 0x2000002, 4*1024*1024, CRC(4f47d434) SHA1(c4503993c738e1b8df6f045f5a82504363682db7) )
-	ROM_LOAD32_WORD( "605a09.25r", 0x2800000, 4*1024*1024, CRC(624fd486) SHA1(edd81d5487f8239ffa89b931430cf41f06a17cf6) )
-	ROM_LOAD32_WORD( "605a08.25m", 0x2800002, 4*1024*1024, CRC(ea80ddfd) SHA1(4be61af09bcc80c97505196a6f43797753d14f85) )
+	_48_WORD_ROM_LOAD( "605a19.14r", 0x0000000, 4*1024*1024, CRC(293427d0) SHA1(c31f93797bda09ea7e990100a5556eb0fde64968) )
+	_48_WORD_ROM_LOAD( "605a15.18r", 0x0000002, 4*1024*1024, CRC(19e6e356) SHA1(b2568e14d6fb9a9792f95aafcf694dbf00c0d2c8) )
+	_48_WORD_ROM_LOAD( "605a11.23r", 0x0000004, 4*1024*1024, CRC(bc61339c) SHA1(77a5737501bf8ffd7ae4192a6e5924c479eb6655) )
+	_48_WORD_ROM_LOAD( "605a18.18m", 0x0c00000, 4*1024*1024, CRC(b5115d76) SHA1(48c3119afb649c58d4df36806fe5530ddd379782) )
+	_48_WORD_ROM_LOAD( "605a14.14m", 0x0c00002, 4*1024*1024, CRC(4d4dbecb) SHA1(7c3cb2739d6b729d855d652b1991c7af6cd79d1c) )
+	_48_WORD_ROM_LOAD( "605a10.23m", 0x0c00004, 4*1024*1024, CRC(4f47d434) SHA1(c4503993c738e1b8df6f045f5a82504363682db7) )
+	_48_WORD_ROM_LOAD( "605a17.16r", 0x1800000, 4*1024*1024, CRC(42e6dc6f) SHA1(8035b7160267a988a1aa2690423c68b6f1975f1a) ) // - these two looks suspicious...
+	_48_WORD_ROM_LOAD( "605a13.21r", 0x1800002, 4*1024*1024, CRC(08137923) SHA1(c1af6b55c1c08e16384d2660b2210ccf3b955be9) ) // /
+	_48_WORD_ROM_LOAD( "605a09.25r", 0x1800004, 4*1024*1024, CRC(624fd486) SHA1(edd81d5487f8239ffa89b931430cf41f06a17cf6) )
+	_48_WORD_ROM_LOAD( "605a16.16m", 0x2400000, 4*1024*1024, CRC(aab542ca) SHA1(9728b028f48768236f47a7a9bddb27944297b583) )
+	_48_WORD_ROM_LOAD( "605a12.21m", 0x2400002, 4*1024*1024, CRC(194ffad0) SHA1(1c56f4e89bfe72b435793b907e7ca3e62ecddf4b) )
+	_48_WORD_ROM_LOAD( "605a08.25m", 0x2400004, 4*1024*1024, CRC(ea80ddfd) SHA1(4be61af09bcc80c97505196a6f43797753d14f85) )
 
 	/* PSAC2 tiles */
 	ROM_REGION( 0x200000, "gfx3", 0 )
diff --git a/src/mame/video/konamigx.c b/src/mame/video/konamigx.c
index 0817f6bb2bc..ea9f5d9e9d7 100644
--- a/src/mame/video/konamigx.c
+++ b/src/mame/video/konamigx.c
@@ -360,8 +360,9 @@ VIDEO_START(konamigx_type3)
 VIDEO_START(konamigx_type4)
 {
 	K056832_vh_start(machine, "gfx1", K056832_BPP_8, 0, NULL, konamigx_type2_tile_callback, 0);
+	K055673_vh_start(machine, "gfx2", K055673_LAYOUT_GX6, -132, -24, konamigx_type2_sprite_callback);
 
-	_gxcommoninit(machine);
+	_gxcommoninitnosprites(machine);
 
 	gx_psac_tilemap = tilemap_create(machine, get_gx_psac_tile_info, tilemap_scan_rows,  16, 16, 128, 128);
 	gx_rozenable = 1;