-zaxxon.cpp: Switched ixion sprite/tilemap priority.

-eolith.cpp, lastfght.cpp: Demoted raccoon and lastfght to not working due to timing issues.

-m62.cpp: Removed outdated comment.

src/mame/drivers/eolith.cpp

@@ -75,7 +75,8 @@
 
   - racooon (Raccoon World)
 
-      Game animation seems too fast?
+      Game animation & timers seem too fast? demoted to NOT WORKING as a
+	  result
 
 -----------------------------------------------------------------------------
  Game Issues (unknown):
@@ -1758,7 +1759,7 @@ GAME( 1998, ironfort,  0,        ironfort, ironfort,  eolith_state, init_eolith,
 GAME( 1998, ironfortc, ironfort, ironfort, ironfortc, eolith_state, init_eolith,   ROT0, "Eolith (Excellent Competence Ltd. license)", "Gongtit Jiucoi Iron Fortress (Hong Kong)", MACHINE_SUPPORTS_SAVE ) // Licensed/Distributed to Hong Kong company Excellent Competence Ltd.
 GAME( 1998, hidnctch,  0,        eolith45, hidnctch,  eolith_state, init_eolith,   ROT0, "Eolith", "Hidden Catch (World) / Tul Lin Gu Lim Chat Ki '98 (Korea) (pcb ver 3.03)",  MACHINE_SUPPORTS_SAVE ) // or Teurrin Geurim Chajgi '98
 GAME( 1998, hidnctcha, hidnctch, eolith45, hidnctch,  eolith_state, init_eolith,   ROT0, "Eolith", "Hidden Catch (World) / Tul Lin Gu Lim Chat Ki '98 (Korea) (pcb ver 3.02)",  MACHINE_SUPPORTS_SAVE ) // or Teurrin Geurim Chajgi '98
-GAME( 1998, raccoon,   0,        eolith45, raccoon,   eolith_state, init_eolith,   ROT0, "Eolith", "Raccoon World", MACHINE_SUPPORTS_SAVE )
+GAME( 1998, raccoon,   0,        eolith45, raccoon,   eolith_state, init_eolith,   ROT0, "Eolith", "Raccoon World", MACHINE_SUPPORTS_SAVE | MACHINE_NOT_WORKING )
 GAME( 1998, puzzlekg,  0,        eolith45, puzzlekg,  eolith_state, init_eolith,   ROT0, "Eolith", "Puzzle King (Dance & Puzzle)",  MACHINE_SUPPORTS_SAVE )
 GAME( 1999, candy,     0,        eolith50, candy,     eolith_state, init_eolith,   ROT0, "Eolith", "Candy Candy",  MACHINE_IMPERFECT_GRAPHICS | MACHINE_SUPPORTS_SAVE )
 GAME( 1999, hidctch2,  0,        eolith50, hidctch2,  eolith_state, init_hidctch2, ROT0, "Eolith", "Hidden Catch 2 (pcb ver 3.03) (Kor/Eng) (AT89c52 protected)", MACHINE_SUPPORTS_SAVE )

src/mame/drivers/lastfght.cpp

@@ -62,6 +62,9 @@ Notes:
                 V106.U16 - MX27C4000 4MBit DIP32 EPROM; Main Program
                 V100.U7  - ST M27C801 8MBit DIP32 EPROM; Audio Samples?
 
+	TODO:
+	 - Game speed seems to be completely wrong, timers and player movement too fast?
+
 *********************************************************************************************************************/
 
 #include "emu.h"
@@ -609,4 +612,4 @@ void lastfght_state::init_lastfght()
 } // Anonymous namespace
 
 
-GAME( 2000, lastfght, 0, lastfght, lastfght, lastfght_state, init_lastfght, ROT0, "Subsino", "Last Fighting", MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
+GAME( 2000, lastfght, 0, lastfght, lastfght, lastfght_state, init_lastfght, ROT0, "Subsino", "Last Fighting", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )

src/mame/drivers/m62.cpp

@@ -4,10 +4,6 @@
 
 Irem "M62" system
 
-TODO:
-- Kid Niki and Horizon are missing the drums. There is an analog section in
-  the sound board.
-
 Notes:
 - I believe that both kungfum bootlegs are derived from an Irem original which we
   don't have (prototype/early revision?). They say "kanfu master" instead of

src/mame/drivers/zaxxon.cpp

@@ -1023,14 +1023,23 @@ void zaxxon_state::razmataze(machine_config &config)
 
 void zaxxon_state::ixion(machine_config &config)
 {
-	razmataze(config);
+	root(config);
 	sega_315_5013_device &maincpu(SEGA_315_5013(config.replace(), m_maincpu, MASTER_CLOCK/16));
 	maincpu.set_addrmap(AS_PROGRAM, &zaxxon_state::ixion_map);
 	maincpu.set_addrmap(AS_OPCODES, &zaxxon_state::decrypted_opcodes_map);
 	maincpu.set_decrypted_tag(":decrypted_opcodes");
 	maincpu.set_size(0x6000);
 
+	config.device_remove("ppi8255");
+
 	m_mainlatch[0]->q_out_cb<6>().set_nop(); // flip screen not used
+
+	/* video hardware */
+	subdevice<screen_device>("screen")->set_screen_update(FUNC(zaxxon_state::screen_update_ixion));
+
+	/* sound hardware */
+	SPEAKER(config, "speaker").front_center();
+	SEGAUSBROM(config, "usbsnd", 0, m_maincpu).add_route(ALL_OUTPUTS, "speaker", 1.0);
 }
 
 
@@ -1615,7 +1624,7 @@ GAME( 1984, futspy,   0,      futspye,   futspy,   zaxxon_state,   empty_init,
 /* these games run on modified Zaxxon hardware with no skewing, extra inputs, and a */
 /* G-80 Universal Sound Board */
 GAME( 1983, razmataz, 0,      razmataze, razmataz, zaxxon_state,   init_razmataz, ROT90,  "Sega",    "Razzmatazz",        MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
-GAME( 1983, ixion,    0,      ixion,     ixion,    zaxxon_state,   empty_init,    ROT270, "Sega",    "Ixion (prototype)", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE)
+GAME( 1983, ixion,    0,      ixion,     ixion,    zaxxon_state,   empty_init,    ROT270, "Sega",    "Ixion (prototype)", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
 
 /* these games run on a slightly newer Zaxxon hardware with more ROM space and a */
 /* custom sprite DMA chip */

src/mame/includes/zaxxon.h

@@ -117,6 +117,7 @@ private:
 	uint32_t screen_update_zaxxon(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	uint32_t screen_update_futspy(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	uint32_t screen_update_razmataz(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+	uint32_t screen_update_ixion(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	uint32_t screen_update_congo(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	DECLARE_WRITE_LINE_MEMBER(vblank_int);
 	void zaxxon_sound_a_w(uint8_t data);

src/mame/video/zaxxon.cpp

@@ -463,6 +463,24 @@ uint32_t zaxxon_state::screen_update_razmataz(screen_device &screen, bitmap_ind1
 	return 0;
 }
 
+uint32_t zaxxon_state::screen_update_ixion(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+	draw_background(bitmap, cliprect, false);
+	// On Ixion the fg tilemap is used to blank out erased tiles. The sprites must appear above these
+	// or bullets and explosions get hidden, leaving the game nearly unplayable.
+	//
+	// On Razzmatazz instead the fg tilemap is used to mask off sprites near the edges so must appear
+	// above them.
+	// 	   
+	// The Zaxxon and Congo Bongo schematics don't appear to show anything related to priority control
+	// so this is most likely a hardwired change somewhere on the PCB.  There are additional bits set
+	// in the 2nd PROM, which are currently masked out as they're not used for palette.
+
+	m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
+	draw_sprites(bitmap, cliprect, 0x140, 0x180);
+	return 0;
+}
+
 
 uint32_t zaxxon_state::screen_update_congo(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
 {