diff --git a/src/mame/drivers/cntsteer.cpp b/src/mame/drivers/cntsteer.cpp
index d22c8ac16ef..e5911229f78 100644
--- a/src/mame/drivers/cntsteer.cpp
+++ b/src/mame/drivers/cntsteer.cpp
@@ -114,6 +114,7 @@ public:
 	DECLARE_MACHINE_START(zerotrgt);
 	DECLARE_MACHINE_RESET(zerotrgt);
 	DECLARE_VIDEO_START(zerotrgt);
+	void cntsteer_palette(palette_device &palette) const;
 	void zerotrgt_palette(palette_device &palette) const;
 	uint32_t screen_update_cntsteer(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	uint32_t screen_update_zerotrgt(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
@@ -132,6 +133,33 @@ public:
 };
 
 
+void cntsteer_state::cntsteer_palette(palette_device &palette) const
+{
+	const uint8_t *color_prom = memregion("proms")->base();
+	for (int i = 0; i < palette.entries(); i++)
+	{
+		int bit0, bit1, bit2;
+
+		// red component
+		bit0 = ((color_prom[i + 0x000] >> 0) & 0x01);
+		bit1 = ((color_prom[i + 0x100] >> 0) & 0x01);
+		bit2 = ((color_prom[i + 0x200] >> 0) & 0x01);
+		int const g = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
+		// green component
+		bit0 = ((color_prom[i + 0x000] >> 1) & 0x01);
+		bit1 = ((color_prom[i + 0x100] >> 1) & 0x01);
+		bit2 = ((color_prom[i + 0x200] >> 1) & 0x01);
+		int const r = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
+		// blue component
+		bit0 = ((color_prom[i + 0x000] >> 2) & 0x01);
+		bit1 = ((color_prom[i + 0x100] >> 2) & 0x01);
+		bit2 = ((color_prom[i + 0x200] >> 2) & 0x01);
+		int const b = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
+
+		palette.set_pen_color(i, rgb_t(r, g, b));
+	}
+}
+
 void cntsteer_state::zerotrgt_palette(palette_device &palette) const
 {
 	const uint8_t *color_prom = memregion("proms")->base();
@@ -860,16 +888,16 @@ static const gfx_layout tilelayout =
 };
 
 static GFXDECODE_START( gfx_cntsteer )
-	GFXDECODE_ENTRY( "gfx1", 0x00000, cntsteer_charlayout, 0, 256 ) /* Only 1 used so far :/ */
-	GFXDECODE_ENTRY( "gfx2", 0x00000, sprites,            0, 256 )
-	GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout,         0, 256 )
+	GFXDECODE_ENTRY( "gfx1", 0x00000, cntsteer_charlayout, 0, 0x40 )
+	GFXDECODE_ENTRY( "gfx2", 0x00000, sprites,             0, 0x20 )
+	GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout,          0, 0x20 )
 GFXDECODE_END
 
 
 static GFXDECODE_START( gfx_zerotrgt )
-	GFXDECODE_ENTRY( "gfx1", 0x00000, zerotrgt_charlayout, 0, 256 ) /* Only 1 used so far :/ */
-	GFXDECODE_ENTRY( "gfx2", 0x00000, sprites,            0, 256 )
-	GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout,         0, 256 )
+	GFXDECODE_ENTRY( "gfx1", 0x00000, zerotrgt_charlayout, 0, 0x40 )
+	GFXDECODE_ENTRY( "gfx2", 0x00000, sprites,             0, 0x20 )
+	GFXDECODE_ENTRY( "gfx3", 0x00000, tilelayout,          0, 0x20 )
 GFXDECODE_END
 
 /***************************************************************************/
@@ -951,8 +979,7 @@ void cntsteer_state::cntsteer(machine_config &config)
 	config.m_perfect_cpu_quantum = subtag("subcpu");
 
 	GFXDECODE(config, m_gfxdecode, m_palette, gfx_cntsteer);
-	PALETTE(config, m_palette).set_entries(256);
-//  MCFG_PALETTE_INIT_OWNER(cntsteer_state,zerotrgt)
+	PALETTE(config, m_palette, FUNC(cntsteer_state::cntsteer_palette), 256);
 
 	MCFG_VIDEO_START_OVERRIDE(cntsteer_state,cntsteer)
 
@@ -1055,10 +1082,11 @@ ROM_START( cntsteer )
 	ROM_LOAD( "by18", 0x20000, 0x2000, CRC(1e9ce047) SHA1(7579ba6b401eb1bfc7d2d9311ebab623bd1095a2) )
 	ROM_LOAD( "by20", 0x30000, 0x2000, CRC(e2198c9e) SHA1(afea262db9154301f4b9e53e1fc91985dd934170) )
 
+	 /* All 82s129 or equivalent */
 	ROM_REGION( 0x300, "proms", ROMREGION_ERASE00 )
-	ROM_LOAD( "by21.j4",  0x0000, 0x100, NO_DUMP ) /* All 82s129 or equivalent */
-	ROM_LOAD( "by22.j5",  0x0100, 0x100, NO_DUMP )
-	ROM_LOAD( "by23.j6",  0x0200, 0x100, NO_DUMP )
+	ROM_LOAD( "by21.j4",  0x0000, 0x100, CRC(10e2cab4) SHA1(c266cb26b9aa3df9385605bd75a37a66ab946051) )
+	ROM_LOAD( "by22.j5",  0x0100, 0x100, CRC(8676ad80) SHA1(891c85a88fda27e7a984eec1011ef931605a443f) )
+	ROM_LOAD( "by23.j6",  0x0200, 0x100, CRC(08dfd511) SHA1(45d107533864bd21d0c4bad9f16cf75bc5e5e6a2) )
 ROM_END
 
 ROM_START( zerotrgt )