diff --git a/src/mame/drivers/undrfire.c b/src/mame/drivers/undrfire.c
index 952491181a6..5d722454a3b 100644
--- a/src/mame/drivers/undrfire.c
+++ b/src/mame/drivers/undrfire.c
@@ -754,6 +754,7 @@ static MACHINE_CONFIG_START( cbombers, undrfire_state )
 	MCFG_TC0480SCP_TX_REGION(4)
 	MCFG_TC0480SCP_OFFSETS(0x24, 0)
 	MCFG_TC0480SCP_OFFSETS_TX(-1, 0)
+	MCFG_TC0480SCP_COL_BASE(4096)
 	MCFG_TC0480SCP_GFXDECODE("gfxdecode")
 	MCFG_TC0480SCP_PALETTE("palette")
 
@@ -1154,6 +1155,6 @@ DRIVER_INIT_MEMBER(undrfire_state,cbombers)
 GAME( 1993, undrfire,  0,        undrfire, undrfire, undrfire_state, undrfire, ROT0, "Taito Corporation Japan",   "Under Fire (World)", 0 )
 GAME( 1993, undrfireu, undrfire, undrfire, undrfire, undrfire_state, undrfire, ROT0, "Taito America Corporation", "Under Fire (US)", 0 )
 GAME( 1993, undrfirej, undrfire, undrfire, undrfire, undrfire_state, undrfire, ROT0, "Taito Corporation",         "Under Fire (Japan)", 0 )
-GAMEL(1994, cbombers,  0,        cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation Japan",   "Chase Bombers (World)", GAME_IMPERFECT_GRAPHICS | GAME_IMPERFECT_COLORS, layout_cbombers )
-GAMEL(1994, cbombersj, cbombers, cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation",         "Chase Bombers (Japan)", GAME_IMPERFECT_GRAPHICS | GAME_IMPERFECT_COLORS, layout_cbombers )
-GAMEL(1994, cbombersp, cbombers, cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation",         "Chase Bombers (Japan Prototype)", GAME_IMPERFECT_GRAPHICS | GAME_IMPERFECT_COLORS, layout_cbombers )
+GAMEL(1994, cbombers,  0,        cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation Japan",   "Chase Bombers (World)", GAME_IMPERFECT_GRAPHICS, layout_cbombers )
+GAMEL(1994, cbombersj, cbombers, cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation",         "Chase Bombers (Japan)", GAME_IMPERFECT_GRAPHICS, layout_cbombers )
+GAMEL(1994, cbombersp, cbombers, cbombers, cbombers, undrfire_state, cbombers, ROT0, "Taito Corporation",         "Chase Bombers (Japan Prototype)", GAME_IMPERFECT_GRAPHICS, layout_cbombers )