diff options
Diffstat (limited to 'src/mame/drivers/xmen.cpp')
-rw-r--r-- | src/mame/drivers/xmen.cpp | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/src/mame/drivers/xmen.cpp b/src/mame/drivers/xmen.cpp index 73d549da487..a886ff9bb40 100644 --- a/src/mame/drivers/xmen.cpp +++ b/src/mame/drivers/xmen.cpp @@ -8,13 +8,19 @@ driver by Nicola Salmoria notes: -the way the double screen works in xmen6p is not fully understood +The way the double screen works in xmen6p is not fully understood. -the board only has one of each gfx chip, the only additional chip not found +One of the screens probably has a buffer to delay it by 1 frame. If you +hardcode buffering to the right screen, the intro is synced correctly, +but in-game is not. Buffer the left screen and then in-game is correct, +but the intro is not. + +The board only has one of each gfx chip, the only additional chip not found on the 2/4p board is 053253. This chip is also on Run n Gun which is -likewise a 2 screen game +likewise a 2 screen game. ***************************************************************************/ + #include "emu.h" #include "includes/xmen.h" #include "includes/konamipt.h" @@ -46,8 +52,10 @@ void xmen_state::eeprom_w(offs_t offset, uint16_t data, uint16_t mem_mask) /* bit 2 is data */ /* bit 3 is clock (active high) */ /* bit 4 is cs (active low) */ - /* bit 5 is enabled in IRQ3, disabled in IRQ5 (sprite DMA start?) */ ioport("EEPROMOUT")->write(data, 0xff); + + /* bit 5 is enabled in IRQ3, disabled in IRQ5 (sprite DMA start?) */ + /* bit 7 used in xmen6p to select other tilemap bank (see halfway level 5) */ m_xmen6p_tilemap_select = BIT(data, 7); } if (ACCESSING_BITS_8_15) @@ -57,7 +65,7 @@ void xmen_state::eeprom_w(offs_t offset, uint16_t data, uint16_t mem_mask) /* bit 9 = enable char ROM reading through the video RAM */ /* bit 10 = sound irq, but with some kind of hold */ m_k052109->set_rmrd_line((data & 0x0200) ? ASSERT_LINE : CLEAR_LINE); - if(data & 0x4) { + if(data & 0x400) { logerror("tick!\n"); m_audiocpu->set_input_line(0, HOLD_LINE); } @@ -115,9 +123,9 @@ void xmen_state::_6p_main_map(address_map &map) { map(0x000000, 0x03ffff).rom(); map(0x080000, 0x0fffff).rom(); - map(0x100000, 0x100fff).ram().share("spriteramleft"); /* sprites (screen 1) */ + map(0x100000, 0x100fff).ram().share("spriteram0"); // left screen map(0x101000, 0x101fff).ram(); - map(0x102000, 0x102fff).ram().share("spriteramright"); /* sprites (screen 2) */ + map(0x102000, 0x102fff).ram().share("spriteram1"); // right screen map(0x103000, 0x103fff).ram(); /* 6p - a buffer? */ map(0x104000, 0x104fff).ram().w("palette", FUNC(palette_device::write16)).share("palette"); map(0x108000, 0x108001).w(FUNC(xmen_state::eeprom_w)); @@ -131,7 +139,7 @@ void xmen_state::_6p_main_map(address_map &map) map(0x10a00c, 0x10a00d).r(m_k053246, FUNC(k053247_device::k053246_r)); /* sprites */ map(0x110000, 0x113fff).ram(); /* main RAM */ /* map(0x18c000, 0x197fff).w("k052109", FUNC(k052109_device:write)).umask16(0x00ff).share("tilemapleft"); */ - map(0x18c000, 0x197fff).ram().share("tilemapleft"); /* left tilemap (p1,p2,p3 counters) */ + map(0x18c000, 0x197fff).ram().share("tilemap0"); // left screen map(0x18fa00, 0x18fa01).w(FUNC(xmen_state::xmen_18fa00_w)); /* map(0x1ac000, 0x1af7ff).readonly(); @@ -143,7 +151,7 @@ void xmen_state::_6p_main_map(address_map &map) map(0x1b4000, 0x1b77ff).readonly(); map(0x1b4000, 0x1b77ff).writeonly(); */ - map(0x1ac000, 0x1b7fff).ram().share("tilemapright"); /* right tilemap */ + map(0x1ac000, 0x1b7fff).ram().share("tilemap1"); // right screen /* what are the regions below buffers? (used by hw or software?) */ /* @@ -153,7 +161,7 @@ void xmen_state::_6p_main_map(address_map &map) map(0x1d0000, 0x1d37ff).readonly(); map(0x1d0000, 0x1d37ff).writeonly(); */ - map(0x1cc000, 0x1d7fff).ram().share("tilemapleftalt"); /* tilemap ? */ + map(0x1cc000, 0x1d7fff).ram().share("tilemap2"); // left screen /* whats the stuff below, buffers? */ /* @@ -164,7 +172,7 @@ void xmen_state::_6p_main_map(address_map &map) map(0x1f4000, 0x1f77ff).readonly(); map(0x1f4000, 0x1f77ff).writeonly(); */ - map(0x1ec000, 0x1f7fff).ram().share("tilemaprightalt"); /* tilemap ? */ + map(0x1ec000, 0x1f7fff).ram().share("tilemap3"); // right screen } @@ -276,9 +284,7 @@ void xmen_state::machine_start() void xmen_state::machine_reset() { - int i; - - for (i = 0; i < 3; i++) + for (int i = 0; i < 3; i++) { m_layerpri[i] = 0; m_layer_colorbase[i] = 0; @@ -297,7 +303,6 @@ TIMER_DEVICE_CALLBACK_MEMBER(xmen_state::xmen_scanline) if(scanline == 0) // sprite DMA irq? m_maincpu->set_input_line(5, HOLD_LINE); - } void xmen_state::xmen(machine_config &config) |