diff --git a/src/mame/drivers/stfight.c b/src/mame/drivers/stfight.c
index 1e6117eb442..f7837e382d3 100644
--- a/src/mame/drivers/stfight.c
+++ b/src/mame/drivers/stfight.c
@@ -230,6 +230,7 @@ DONE? (check on real board)
 
 #include "emu.h"
 #include "cpu/z80/z80.h"
+#include "cpu/m6805/m6805.h"
 #include "sound/2203intf.h"
 #include "sound/msm5205.h"
 #include "includes/stfight.h"
@@ -258,9 +259,11 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( cshooter_cpu1_map, AS_PROGRAM, 8, stfight_state )
 /*	TODO: Main to MCU ports reads at 0x0004 - 0x0007 (yeah, in ROM area!) */
+	AM_RANGE(0x0007, 0x0007) AM_READ(cshooter_mcu_unk1_r)
 	AM_RANGE(0xc203, 0xc203) AM_READ_PORT("DSW1")
 	AM_RANGE(0xc204, 0xc204) AM_READ_PORT("DSW0")
 	AM_RANGE(0xd000, 0xd7ff) AM_RAM_WRITE(cshooter_text_w) AM_SHARE("tx_vram")
+	AM_RANGE(0xd809, 0xd809) AM_WRITE(stfight_bank_w)
 	AM_IMPORT_FROM(cpu1_map)
 ADDRESS_MAP_END
 
@@ -273,6 +276,18 @@ static ADDRESS_MAP_START( cpu2_map, AS_PROGRAM, 8, stfight_state )
 	AM_RANGE(0xf800, 0xffff) AM_RAM
 ADDRESS_MAP_END
 
+static ADDRESS_MAP_START( cshooter_mcu_map, AS_PROGRAM, 8, stfight_state )
+	ADDRESS_MAP_GLOBAL_MASK(0x7ff)
+//	AM_RANGE(0x0000, 0x0000) AM_READWRITE(mexico86_68705_port_a_r,mexico86_68705_port_a_w)
+//	AM_RANGE(0x0001, 0x0001) AM_READWRITE(mexico86_68705_port_b_r,mexico86_68705_port_b_w)
+//	AM_RANGE(0x0002, 0x0002) AM_READ_PORT("IN0") /* COIN */
+//	AM_RANGE(0x0004, 0x0004) AM_WRITE(mexico86_68705_ddr_a_w)
+//	AM_RANGE(0x0005, 0x0005) AM_WRITE(mexico86_68705_ddr_b_w)
+//	AM_RANGE(0x000a, 0x000a) AM_WRITENOP
+	AM_RANGE(0x0010, 0x007f) AM_RAM
+	AM_RANGE(0x0080, 0x07ff) AM_ROM
+ADDRESS_MAP_END
+
 
 static INPUT_PORTS_START( stfight )
 	PORT_START("P1")    /* PLAYER 1 */
@@ -552,6 +567,9 @@ static MACHINE_CONFIG_DERIVED( cshooter, stfight )
 	MCFG_CPU_MODIFY("maincpu")
 	MCFG_CPU_PROGRAM_MAP(cshooter_cpu1_map)
 
+	MCFG_CPU_ADD("mcu", M68705, 3000000)   /* 3 MHz */
+	MCFG_CPU_PROGRAM_MAP(cshooter_mcu_map)
+
 	MCFG_GFXDECODE(cshooter)
 	MCFG_VIDEO_START_OVERRIDE(stfight_state,cshooter)
 MACHINE_CONFIG_END
@@ -974,4 +992,5 @@ GAME( 1986, empcityj, empcity, stfight, stfight, stfight_state, stfight, ROT0,
 GAME( 1986, empcityi, empcity, stfight, stfight, stfight_state, stfight, ROT0,   "Seibu Kaihatsu (Eurobed license)",         "Empire City: 1931 (Italy)", 0 )
 GAME( 1986, stfight,  empcity, stfight, stfight, stfight_state, stfight, ROT0,   "Seibu Kaihatsu (Tuning license)",          "Street Fight (Germany)", 0 )
 GAME( 1986, stfighta, empcity, stfight, stfight, stfight_state, stfight, ROT0,   "Seibu Kaihatsu",                           "Street Fight (bootleg?)", 0 )
-GAME( 1987, cshooter,  0,      cshooter,cshooter, stfight_state, cshooter,ROT270, "Seibu Kaihatsu (Taito license)",  "Cross Shooter (not encrypted)", GAME_UNEMULATED_PROTECTION | GAME_IMPERFECT_GRAPHICS | GAME_NOT_WORKING | GAME_NO_SOUND )
+/* Cross Shooter runs on a slightly modified version of Empire City, with M68705 MCU, a different text tilemap and gfx blobs (see also airraid.c) */
+GAME( 1987, cshooter,  0,      cshooter,cshooter, stfight_state, cshooter,ROT270,"Seibu Kaihatsu (Taito license)",           "Cross Shooter (not encrypted)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
diff --git a/src/mame/includes/stfight.h b/src/mame/includes/stfight.h
index e1c82584060..32a1bab5855 100644
--- a/src/mame/includes/stfight.h
+++ b/src/mame/includes/stfight.h
@@ -56,6 +56,7 @@ public:
 	TILE_GET_INFO_MEMBER(get_bg_tile_info);
 	TILE_GET_INFO_MEMBER(get_tx_tile_info);
 	TILE_GET_INFO_MEMBER(get_cshooter_tx_tile_info);
+	DECLARE_READ8_MEMBER(cshooter_mcu_unk1_r);
 	DECLARE_VIDEO_START(stfight);
 	DECLARE_VIDEO_START(cshooter);
 	virtual void machine_reset();
diff --git a/src/mame/machine/stfight.c b/src/mame/machine/stfight.c
index 50ece3c0199..983b88fb7e5 100644
--- a/src/mame/machine/stfight.c
+++ b/src/mame/machine/stfight.c
@@ -82,7 +82,10 @@ DRIVER_INIT_MEMBER(stfight_state,stfight)
 
 DRIVER_INIT_MEMBER(stfight_state,cshooter)
 {
-	// ...
+	UINT8 *rom = memregion("maincpu")->base();
+
+	/* patch out initial coin mech check for now */
+	rom[0x5068] = 0xc9; /* ret z -> ret*/
 }
 
 void stfight_state::machine_reset()
@@ -107,7 +110,7 @@ WRITE8_MEMBER(stfight_state::stfight_bank_w)
 {
 	UINT8   *ROM2 = memregion("maincpu")->base() + 0x10000;
 
-	membank("bank1")->set_base(&ROM2[data<<14] );
+	membank("bank1")->set_base(&ROM2[0x4000*((data>>4)&3)] );
 }
 
 /*
@@ -184,6 +187,11 @@ WRITE8_MEMBER(stfight_state::stfight_coin_w)
 	m_coin_mech_query = data;
 }
 
+READ8_MEMBER(stfight_state::cshooter_mcu_unk1_r)
+{
+	return 0xff; // hack so it boots
+}
+
 /*
  *      Machine hardware for MSM5205 ADPCM sound control
  */