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-rw-r--r--src/mame/drivers/metlfrzr.cpp471
1 files changed, 0 insertions, 471 deletions
diff --git a/src/mame/drivers/metlfrzr.cpp b/src/mame/drivers/metlfrzr.cpp
deleted file mode 100644
index 65fcaf95eac..00000000000
--- a/src/mame/drivers/metlfrzr.cpp
+++ /dev/null
@@ -1,471 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Angelo Salese
-// thanks-to: David Haywood, Peter Wilhelmsen
-/*************************************************************************************************************************
-
- Metal Freezer (c) 1989 Seibu
-
- driver by Angelo Salese, based off initial work by David Haywood
- thanks to Peter Wilhelmsen for the decryption
-
- HW seems the natural evolution of Dark Mist type.
-
- TODO:
- - A few video register bits still needs sorting out (needs HW tests perhaps?)
- - Nuke legacy video code and re-do it by using tilemap system.
- - sprites are ahead of 1/2 frames, needs sprite DMA fixed;
- - Writes at 0xb800-0xbfff or 0x8000-0x9fff during gameplays? (Check by allowing ROM write)
- - Flip screen support;
- - Why service mode returns all inputs as high? And why sound test doesn't seem to function at all, both BTANBs perhaps?
-
-**************************************************************************************************************************/
-
-#include "emu.h"
-#include "audio/t5182.h"
-
-#include "cpu/z80/z80.h"
-#include "machine/timer.h"
-#include "emupal.h"
-#include "screen.h"
-#include "speaker.h"
-
-
-class metlfrzr_state : public driver_device
-{
-public:
- metlfrzr_state(const machine_config &mconfig, device_type type, const char *tag) :
- driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_decrypted_opcodes(*this, "decrypted_opcodes"),
- m_work_ram(*this, "wram"),
- m_vram(*this, "vram"),
- m_video_regs(*this, "vregs"),
- m_palette(*this, "palette"),
- m_gfxdecode(*this, "gfxdecode")
- { }
-
- void metlfrzr(machine_config &config);
-
- void init_metlfrzr();
-
-private:
- virtual void machine_start() override;
- virtual void machine_reset() override;
- virtual void video_start() override;
- void legacy_bg_draw(bitmap_ind16 &bitmap, const rectangle &cliprect);
- void legacy_obj_draw(bitmap_ind16 &bitmap, const rectangle &cliprect);
-
- uint32_t screen_update_metlfrzr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- required_device<cpu_device> m_maincpu;
- required_shared_ptr<uint8_t> m_decrypted_opcodes;
- required_shared_ptr<uint8_t> m_work_ram;
- required_shared_ptr<uint8_t> m_vram;
- required_shared_ptr<uint8_t> m_video_regs;
- required_device<palette_device> m_palette;
- required_device<gfxdecode_device> m_gfxdecode;
-
- DECLARE_WRITE8_MEMBER(output_w);
- TIMER_DEVICE_CALLBACK_MEMBER(scanline);
- uint8_t m_fg_tilebank;
- bool m_rowscroll_enable;
- void decrypted_opcodes_map(address_map &map);
- void metlfrzr_map(address_map &map);
-};
-
-
-void metlfrzr_state::video_start()
-{
-}
-
-/*
- - video regs format:
- [0x06] ---- --x- used during title screen transition, unknown purpose
- [0x06] ---- ---x X scrolling 8th bit
- [0x15] always 0?
- [0x16] always 0?
- [0x17] xxxx xxxx X scrolling base value
- Notice that it's currently unknown how the game is really supposed to NOT enable scrolling during gameplay.
- */
-void metlfrzr_state::legacy_bg_draw(bitmap_ind16 &bitmap,const rectangle &cliprect)
-{
- gfx_element *gfx = m_gfxdecode->gfx(m_fg_tilebank);
- const uint16_t vram_mask = m_vram.mask() >> 1;
- int count;
- int x_scroll_base;
- int x_scroll_shift;
- uint16_t x_scroll_value;
- x_scroll_value = m_video_regs[0x17] + ((m_video_regs[0x06] & 1) << 8);
- x_scroll_base = (x_scroll_value >> 3) * 32;
-
- for (count=0;count<32*33;count++)
- {
- int tile_base = count;
- int y = (count % 32);
- if(y > 7 || m_rowscroll_enable == false)
- {
- tile_base+= x_scroll_base;
- x_scroll_shift = (x_scroll_value & 7);
- }
- else
- x_scroll_shift = 0;
- tile_base &= vram_mask;
- int x = (count / 32);
-
-
- uint16_t tile = m_vram[tile_base*2+0] + ((m_vram[tile_base*2+1] & 0xf0) << 4);
- uint8_t color = m_vram[tile_base*2+1] & 0xf;
-
- gfx->transpen(bitmap,cliprect,tile,color,0,0,x*8-x_scroll_shift,y*8,0xf);
- }
-
-}
-
-/*
- sprite DMA:
- 0xfe00-0xffff contains buffer for data to be copied.
- Sprites are currently lagging (noticeable during scrolling) therefore there must be either an automatic or manual trigger.
- Sprite seems to traverse from top to bottom priority-wise, other than that format is almost 1:1 with darkmist.cpp.
- sprite format:
- [0] tttt tttt tile number
- [1] x--- ---- X 8th bit
- [1] -ttt ---- tile bank
- [1] ---- cccc palette number
- [2] yyyy yyyy Y offset
- [3] xxxx xxxx X offset
-*/
-void metlfrzr_state::legacy_obj_draw(bitmap_ind16 &bitmap,const rectangle &cliprect)
-{
- gfx_element *gfx_2 = m_gfxdecode->gfx(2);
- gfx_element *gfx_3 = m_gfxdecode->gfx(3);
- int count;
- uint8_t *base_spriteram = m_work_ram + 0xe00;
-
- for(count=0x200-4;count>-1;count-=4)
- {
- gfx_element *cur_gfx = base_spriteram[count+1] & 0x40 ? gfx_3 : gfx_2;
- uint8_t tile_bank = (base_spriteram[count+1] & 0x30) >> 4;
- uint16_t tile = base_spriteram[count] | (tile_bank << 8);
- uint8_t color = base_spriteram[count+1] & 0xf;
- int y = base_spriteram[count+2];
- int x = base_spriteram[count+3];
- if(base_spriteram[count+1] & 0x80)
- x-=256;
-
- cur_gfx->transpen(bitmap,cliprect,tile,color,0,0,x,y,0xf);
- }
-}
-
-uint32_t metlfrzr_state::screen_update_metlfrzr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- bitmap.fill(m_palette->black_pen(), cliprect);
-
- legacy_bg_draw(bitmap,cliprect);
- legacy_obj_draw(bitmap,cliprect);
- return 0;
-}
-
-WRITE8_MEMBER(metlfrzr_state::output_w)
-{
- // bit 7: flip screen
- // bit 6-5: coin lockouts
- // bit 4: tilemap ROM banking
- // bit 3-2: z80 ROM banking
- // bit 1: enabled during gameplay, rowscroll enable?
- // bit 0: enabled , unknown purpose (lamp?)
- // TODO: bits 1-0 might actually be sprite DMA enable mask/request
- machine().bookkeeping().coin_lockout_w(1, BIT(data,6) );
- machine().bookkeeping().coin_lockout_w(0, BIT(data,5) );
- m_fg_tilebank = (data & 0x10) >> 4;
- membank("bank1")->set_entry((data & 0xc) >> 2);
- m_rowscroll_enable = bool(BIT(data,1));
-
-// popmessage("%02x %02x",m_fg_tilebank,data & 3);
-}
-
-void metlfrzr_state::metlfrzr_map(address_map &map)
-{
- map(0x0000, 0x7fff).rom();
- map(0x8000, 0xbfff).bankr("bank1");
- map(0xc000, 0xcfff).ram().share("vram");
- map(0xd000, 0xd1ff).ram().w(m_palette, FUNC(palette_device::write_indirect)).share("palette");
- map(0xd200, 0xd3ff).ram().w(m_palette, FUNC(palette_device::write_indirect_ext)).share("palette_ext");
-
- map(0xd400, 0xd47f).rw("t5182", FUNC(t5182_device::sharedram_r), FUNC(t5182_device::sharedram_w));
-
- map(0xd600, 0xd600).portr("P1");
- map(0xd601, 0xd601).portr("P2");
- map(0xd602, 0xd602).portr("START");
- map(0xd603, 0xd603).portr("DSW1");
- map(0xd604, 0xd604).portr("DSW2");
- map(0xd600, 0xd61f).writeonly().share("vregs");
-
- map(0xd700, 0xd700).w(FUNC(metlfrzr_state::output_w));
- map(0xd710, 0xd710).w("t5182", FUNC(t5182_device::sound_irq_w));
- map(0xd711, 0xd711).r("t5182", FUNC(t5182_device::sharedram_semaphore_snd_r));
- // following two do swapped access compared to darkmist
- map(0xd712, 0xd712).w("t5182", FUNC(t5182_device::sharedram_semaphore_main_release_w));
- map(0xd713, 0xd713).w("t5182", FUNC(t5182_device::sharedram_semaphore_main_acquire_w));
-
- map(0xd800, 0xdfff).ram();
- map(0xe000, 0xefff).ram();
- map(0xf000, 0xffff).ram().share("wram");
-}
-
-void metlfrzr_state::decrypted_opcodes_map(address_map &map)
-{
- map(0x0000, 0x7fff).rom().share("decrypted_opcodes");
- map(0x8000, 0xbfff).bankr("bank1");
- map(0xf000, 0xffff).ram().share("wram"); // executes code at 0xf5d5
-}
-
-
-static INPUT_PORTS_START( metlfrzr )
- PORT_START("P1")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
- PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNKNOWN )
-
- PORT_START("P2")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
- PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNKNOWN )
-
- PORT_START("START")
- PORT_DIPNAME( 0x01, 0x01, "2-0" )
- PORT_DIPSETTING( 0x01, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
- PORT_DIPNAME( 0x02, 0x02, "2-1" )
- PORT_DIPSETTING( 0x02, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
- PORT_DIPNAME( 0x04, 0x04, "2-2" )
- PORT_DIPSETTING( 0x04, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
- PORT_DIPNAME( 0x08, 0x08, "2-3" )
- PORT_DIPSETTING( 0x08, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
- PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_START1 )
- PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_START2 )
- PORT_DIPNAME( 0x40, 0x40, "2-6" )
- PORT_DIPSETTING( 0x40, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
- PORT_DIPNAME( 0x80, 0x80, "2-7" )
- PORT_DIPSETTING( 0x80, DEF_STR( No ) )
- PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
-
- PORT_START("DSW1")
- PORT_DIPNAME( 0x01, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SW1:1")
- PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
- PORT_DIPSETTING( 0x01, DEF_STR( Cocktail ) )
- PORT_SERVICE_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW1:2" )
- PORT_DIPNAME( 0x04, 0x04, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SW1:3")
- PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x00, DEF_STR( On ) )
- PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:4,5,6")
- PORT_DIPSETTING( 0x00, DEF_STR( 5C_1C ) )
- PORT_DIPSETTING( 0x20, DEF_STR( 4C_1C ) )
- PORT_DIPSETTING( 0x10, DEF_STR( 3C_1C ) )
- PORT_DIPSETTING( 0x30, DEF_STR( 2C_1C ) )
- PORT_DIPSETTING( 0x38, DEF_STR( 1C_1C ) )
- PORT_DIPSETTING( 0x18, DEF_STR( 1C_2C ) )
- PORT_DIPSETTING( 0x28, DEF_STR( 1C_3C ) )
- PORT_DIPSETTING( 0x08, DEF_STR( 1C_5C ) )
- PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:7,8")
- PORT_DIPSETTING( 0x80, DEF_STR( 2C_1C ) )
- PORT_DIPSETTING( 0x00, DEF_STR( 2C_3C ) )
- PORT_DIPSETTING( 0xc0, DEF_STR( 1C_1C ) )
- PORT_DIPSETTING( 0x40, DEF_STR( 1C_2C ) )
-
- PORT_START("DSW2")
- PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:1,2")
- PORT_DIPSETTING( 0x02, "A" )
- PORT_DIPSETTING( 0x03, "B" )
- PORT_DIPSETTING( 0x01, "C" )
- PORT_DIPSETTING( 0x00, "D" )
- // service mode returns these values divided by 10 (so 02/05/10 effectively means 20k, 50k, 100k)
- // TODO: check if it extends
- PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW2:3,4")
- PORT_DIPSETTING( 0x08, "20k, 50k, 100k" )
- PORT_DIPSETTING( 0x0c, "30k, 80k, 150k" )
- PORT_DIPSETTING( 0x04, "50k, 100k, 200k" )
- PORT_DIPSETTING( 0x00, "100k, 200k, 400k" )
- PORT_DIPNAME( 0x30, 0x30, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW2:5,6")
- PORT_DIPSETTING( 0x20, "1" )
- PORT_DIPSETTING( 0x10, "2" )
- PORT_DIPSETTING( 0x30, "3" )
- PORT_DIPSETTING( 0x00, "4" )
- // disabling following enables intro / how to play screens
- PORT_DIPNAME( 0x40, 0x40, DEF_STR( Level_Select ) ) PORT_DIPLOCATION("SW2:7")
- PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x00, DEF_STR( On ) )
- PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:8")
- PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x00, DEF_STR( On ) )
-INPUT_PORTS_END
-
-
-
-void metlfrzr_state::machine_start()
-{
- membank("bank1")->configure_entries(0, 4, memregion("maincpu")->base() + 0x10000, 0x4000);
-}
-
-void metlfrzr_state::machine_reset()
-{
- membank("bank1")->set_entry(0);
-
-}
-
-
-static const gfx_layout tile_layout =
-{
- 8,8,
- RGN_FRAC(1,1),
- 4,
- { STEP4(0,4) },
- { STEP4_INV(16,1), STEP4_INV(0,1) },
- { STEP8(0,32) },
- 32*8
-};
-
-static const gfx_layout sprite_layout =
-{
- 16, 16,
- RGN_FRAC(1, 1),
- 4,
- { STEP4(0,4) },
- { STEP4(0,1), STEP4(16,1), STEP4(64*8,1), STEP4(64*8+16,1) },
- { STEP16(0,32) },
- 128 * 8
-};
-
-
-static GFXDECODE_START(gfx_metlfrzr)
- GFXDECODE_ENTRY("gfx1", 0, tile_layout, 0x100, 16)
- GFXDECODE_ENTRY("gfx2", 0, tile_layout, 0x100, 16)
- GFXDECODE_ENTRY("gfx3", 0, sprite_layout, 0, 16)
- GFXDECODE_ENTRY("gfx4", 0, sprite_layout, 0, 16)
-GFXDECODE_END
-
-TIMER_DEVICE_CALLBACK_MEMBER(metlfrzr_state::scanline)
-{
- int scanline = param;
-
- if(scanline == 240) // vblank-out irq
- m_maincpu->set_input_line_and_vector(0, HOLD_LINE,0xd7); /* Z80 - RST 10h */
-
- // TODO: check this irq.
- if(scanline == 0) // vblank-in irq
- m_maincpu->set_input_line_and_vector(0, HOLD_LINE,0xcf); /* Z80 - RST 08h */
-}
-
-void metlfrzr_state::metlfrzr(machine_config &config)
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, XTAL(12'000'000) / 2);
- m_maincpu->set_addrmap(AS_PROGRAM, &metlfrzr_state::metlfrzr_map);
- m_maincpu->set_addrmap(AS_OPCODES, &metlfrzr_state::decrypted_opcodes_map);
- TIMER(config, "scantimer").configure_scanline(FUNC(metlfrzr_state::scanline), "screen", 0, 1);
-
- T5182(config, "t5182", 0);
-
- PALETTE(config, m_palette).set_format(palette_device::xBGR_444, 0x200).set_indirect_entries(256 * 2);
-
- GFXDECODE(config, m_gfxdecode, m_palette, gfx_metlfrzr);
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(60);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
- screen.set_size(256, 256);
- screen.set_visarea(0, 256 - 1, 16, 256 - 16 - 1);
- screen.set_screen_update(FUNC(metlfrzr_state::screen_update_metlfrzr));
- screen.set_palette(m_palette);
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
-
- ym2151_device &ymsnd(YM2151(config, "ymsnd", XTAL(14'318'181) / 4)); /* 3.579545 MHz */
- ymsnd.irq_handler().set("t5182", FUNC(t5182_device::ym2151_irq_handler));
- ymsnd.add_route(0, "mono", 1.0);
- ymsnd.add_route(1, "mono", 1.0);
-}
-
-
-
-ROM_START(metlfrzr)
- ROM_REGION(0x20000, "maincpu", 0)
- ROM_LOAD("1.15j", 0x00000, 0x08000, CRC(f59b5fa2) SHA1(6033967dad5e64f45afbcb1b45c8eb79e0787afb))
- ROM_LOAD("2.14j", 0x10000, 0x10000, CRC(21ecc248) SHA1(2fccf7db73890faf7c489bfc43c88ded54d5052d))
-
- ROM_REGION(0x8000, "t5182_z80", 0) /* Toshiba T5182 external data ROM */
- ROM_LOAD("3.4h", 0x0000, 0x8000, CRC(36f88e54) SHA1(5cbea56c7e547c353ae2f9256caaceb20e5e8503))
-
- ROM_REGION(0x20000, "gfx1", 0)
- ROM_LOAD16_BYTE("10.5a", 0x00001, 0x10000, CRC(3313e74a) SHA1(8622dfb5c013173d5bb037254f4c23b1282404e1))
- ROM_LOAD16_BYTE("12.7a", 0x00000, 0x10000, CRC(6da5fda9) SHA1(9d7b0b26598f31da589fece3535a4d1405b03fc2))
-
- ROM_REGION(0x20000, "gfx2", 0)
- ROM_LOAD16_BYTE("11.6a", 0x00001, 0x10000, CRC(fa6490b8) SHA1(9a4c1e09b9e8fb256fec0a5ed120fece8a12e1c8))
- ROM_LOAD16_BYTE("13.9a", 0x00000, 0x10000, CRC(a4f689ec) SHA1(e58bfede3fabf4cfca76c20aafb3e9fb604777c9))
-
- ROM_REGION(0x20000, "gfx3", 0)
- ROM_LOAD16_BYTE("14.13a", 0x00001, 0x10000, CRC(a9cd5225) SHA1(f3d5e29ee08fb563fdc1af3c64128f2cd2feb987))
- ROM_LOAD16_BYTE("16.11a", 0x00000, 0x10000, CRC(92f2cb49) SHA1(498021d94b0fde216207076491702af2324a2dcc))
-
- ROM_REGION(0x20000, "gfx4", 0)
- ROM_LOAD16_BYTE("15.12a", 0x00001, 0x10000, CRC(ce5c4c8b) SHA1(2351d66ba51e80097ce53bfd448ac24901844cda))
- ROM_LOAD16_BYTE("17.10a", 0x00000, 0x10000, CRC(3fec33f7) SHA1(af086ba30fc4521a0114da2824f5baa04d225a89))
-
- ROM_REGION(0x20000, "proms", 0)
- ROM_LOAD("n8s129a.7f", 0x000, 0x100, CRC(c849d60b) SHA1(0022fb71b3d777cadac7005e6156725df9bcaf90))
- ROM_LOAD("n82s135n.9c", 0x000, 0x100, CRC(7bbd52db) SHA1(b9bab5fb515579d0270aea8b992a16eeb878f242))
-
- ROM_REGION(0x20000, "plds", 0)
- ROM_LOAD("pld3.14h.bin", 0x000, 0x149, CRC(8183f7f0) SHA1(3cec53838120064374ecf4ebee048409c6f34081))
- ROM_LOAD("pld8.4d.bin", 0x000, 0x149, CRC(f1e35034) SHA1(527faddbf2ac905fa59ebda8ea327e6e6a7c1fb6))
-ROM_END
-
-
-
-void metlfrzr_state::init_metlfrzr()
-{
- // same as cshooter.cpp
- uint8_t *rom = memregion("maincpu")->base();
-
- for (int A = 0x0000;A < 0x8000;A++)
- {
- /* decode the opcodes */
- m_decrypted_opcodes[A] = rom[A];
-
- if (BIT(A,5) && !BIT(A,3))
- m_decrypted_opcodes[A] ^= 0x40;
-
- if (BIT(A,10) && !BIT(A,9) && BIT(A,3))
- m_decrypted_opcodes[A] ^= 0x20;
-
- if ((BIT(A,10) ^ BIT(A,9)) && BIT(A,1))
- m_decrypted_opcodes[A] ^= 0x02;
-
- if (BIT(A,9) || !BIT(A,5) || BIT(A,3))
- m_decrypted_opcodes[A] = bitswap<8>(m_decrypted_opcodes[A],7,6,1,4,3,2,5,0);
-
- /* decode the data */
- if (BIT(A,5))
- rom[A] ^= 0x40;
-
- if (BIT(A,9) || !BIT(A,5))
- rom[A] = bitswap<8>(rom[A],7,6,1,4,3,2,5,0);
- }
-}
-
-
-
-GAME( 1989, metlfrzr, 0, metlfrzr, metlfrzr, metlfrzr_state, init_metlfrzr, ROT270, "Seibu Kaihatsu", "Metal Freezer (Japan)", MACHINE_NO_COCKTAIL )