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Diffstat (limited to 'trunk/src/mame/drivers/mirax.c')
-rw-r--r--trunk/src/mame/drivers/mirax.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/trunk/src/mame/drivers/mirax.c b/trunk/src/mame/drivers/mirax.c
new file mode 100644
index 00000000000..f48d28d7ec8
--- /dev/null
+++ b/trunk/src/mame/drivers/mirax.c
@@ -0,0 +1,507 @@
+/*
+****************************************************
+Mirax (C)1985 Current Technologies
+
+driver by
+Tomasz Slanina analog[AT]op[DOT]pl
+Angelo Salese
+Olivier Galibert
+
+TODO:
+- sound is hacky at the moment, so it can't be 100% trusted
+- sprite offsets?
+- score / credits display should stay above the sprites?
+
+====================================================
+
+CPU: Ceramic potted module, Z80C
+Sound: AY-3-8912 (x2)
+RAM: 74S201, 74S201 (x6), 2148 (x6), 2114 (x2), 58725 (x2), 6116
+PROMS: 82S123 (x2)
+XTAL: 12 MHz
+
+Here comes a high energy space game of its own kind.
+
+Mirax(TM)
+* First person perspective
+* Fully integrated game play.
+* Continually changing 3-D graphics plus powerful sound effects.
+
+HOW TO PLAY
+1. Your goal is to terminate Mirax City - a giant enemy central station shown at stage 10.
+2. Destroy all enemy objects (air or ground) as many as you can. Avoid indestructible building blocks.
+3. Shooting a group of ground targets causes satellites to rise.
+4. Enemy flagship appears after a wave of far ground vessels completely destroyed.
+5. Hitting flagship puts you into power shooting mode - no fire button required.
+6. Bonus flag is given for each flagship hit. 5 or 8 flags award you an extra fighter.
+7. Use joystick to take sight before firing.
+
+
+Pinouts
+
+Parts Solder
+1 Gnd Gnd
+2 Gnd Gnd
+3 Gnd Video gnd
+4 Gnd Gnd
+5
+6
+7
+8
+9 Coin 1 Video sync
+10 Up
+11 Fire
+12 Down
+13 start1 start2
+14 left
+15 right
+16 Video green
+17 Video blue
+18 Video red
+19 Speaker- Speaker+
+20 +5 +5
+21 +5 +5
+22 +12 +12
+
+
+The End
+
+************************************************
+*/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "sound/ay8910.h"
+
+
+class mirax_state : public driver_device
+{
+public:
+ mirax_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag) { }
+
+ UINT8 *m_spriteram;
+ UINT8 m_nAyCtrl;
+ UINT8 m_nAyData;
+ UINT8 m_nmi_mask;
+ UINT8 *m_videoram;
+ UINT8 *m_colorram;
+};
+
+
+static VIDEO_START(mirax)
+{
+}
+
+static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
+{
+ mirax_state *state = machine.driver_data<mirax_state>();
+ UINT8 *spriteram = state->m_spriteram;
+ int count;
+
+ for(count=0;count<0x200;count+=4)
+ {
+ int spr_offs,x,y,color,fx,fy;
+
+ if(spriteram[count] == 0x00 || spriteram[count+3] == 0x00)
+ continue;
+
+ spr_offs = (spriteram[count+1] & 0x3f);
+ color = spriteram[count+2] & 0x7;
+ fx = spriteram[count+1] & 0x40; //<- guess
+ fy = spriteram[count+1] & 0x80;
+
+ spr_offs += (spriteram[count+2] & 0xe0)<<1;
+ spr_offs += (spriteram[count+2] & 0x10)<<5;
+
+ y = 0x100 - spriteram[count];
+ x = spriteram[count+3];
+
+ drawgfx_transpen(bitmap,cliprect,machine.gfx[1],spr_offs,color,fx,fy,x,y-16,0);
+ }
+}
+
+static SCREEN_UPDATE(mirax)
+{
+ mirax_state *state = screen->machine().driver_data<mirax_state>();
+ const gfx_element *gfx = screen->machine().gfx[0];
+ int count = 0x00000;
+ int y,x;
+
+ for (y=0;y<32;y++)
+ {
+ for (x=0;x<32;x++)
+ {
+ int tile = state->m_videoram[count];
+ int color = (state->m_colorram[x*2]<<8) | (state->m_colorram[(x*2)+1]);
+ int x_scroll = (color & 0xff00)>>8;
+ tile |= ((color & 0xe0)<<3);
+
+ drawgfx_opaque(bitmap,cliprect,gfx,tile,color & 7,0,0,(x*8),(y*8)-x_scroll);
+ /* wrap-around */
+ drawgfx_opaque(bitmap,cliprect,gfx,tile,color & 7,0,0,(x*8),(y*8)-x_scroll+256);
+
+ count++;
+ }
+ }
+
+ draw_sprites(screen->machine(),bitmap,cliprect);
+
+ count = 0x00000;
+
+ /* draw score and credit displays above the sprites */
+ for (y=0;y<32;y++)
+ {
+ for (x=0;x<32;x++)
+ {
+ int tile = state->m_videoram[count];
+ int color = (state->m_colorram[x*2]<<8) | (state->m_colorram[(x*2)+1]);
+ int x_scroll = (color & 0xff00)>>8;
+ tile |= ((color & 0xe0)<<3);
+
+ if(x <= 1 || x >= 30)
+ {
+ drawgfx_opaque(bitmap,cliprect,gfx,tile,color & 7,0,0,(x*8),(y*8)-x_scroll);
+ /* wrap-around */
+ drawgfx_opaque(bitmap,cliprect,gfx,tile,color & 7,0,0,(x*8),(y*8)-x_scroll+256);
+ }
+
+ count++;
+ }
+ }
+
+ return 0;
+}
+
+
+static SOUND_START(mirax)
+{
+ mirax_state *state = machine.driver_data<mirax_state>();
+ state->m_nAyCtrl = 0x00;
+ state->m_nAyData = 0x00;
+}
+
+static WRITE8_HANDLER(audio_w)
+{
+ mirax_state *state = space->machine().driver_data<mirax_state>();
+ if(cpu_get_previouspc(&space->device())==0x2fd)
+ {
+ state->m_nAyCtrl=offset;
+ state->m_nAyData=data;
+ }
+}
+
+static WRITE8_DEVICE_HANDLER(ay_sel)
+{
+ mirax_state *state = device->machine().driver_data<mirax_state>();
+ if(cpu_get_previouspc(device->machine().device("audiocpu"))==0x309)
+ {
+ ay8910_address_w(device,0,state->m_nAyCtrl);
+ ay8910_data_w(device,0,state->m_nAyData);
+ }
+}
+
+static READ8_HANDLER( unk_r )
+{
+ return 0xff;
+}
+
+static WRITE8_HANDLER( nmi_mask_w )
+{
+ mirax_state *state = space->machine().driver_data<mirax_state>();
+ state->m_nmi_mask = data & 1;
+ if(data & 0xfe)
+ printf("Warning: %02x written at $f501\n",data);
+}
+
+static WRITE8_HANDLER( mirax_sound_cmd_w )
+{
+ soundlatch_w(space, 0, data & 0xff);
+ cputag_set_input_line(space->machine(), "audiocpu", INPUT_LINE_NMI, PULSE_LINE);
+}
+
+static ADDRESS_MAP_START( mirax_main_map, AS_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0xbfff) AM_ROM
+ AM_RANGE(0xc800, 0xd7ff) AM_RAM
+ AM_RANGE(0xe000, 0xe3ff) AM_RAM AM_BASE_MEMBER(mirax_state, m_videoram)
+ AM_RANGE(0xe800, 0xe9ff) AM_RAM AM_BASE_MEMBER(mirax_state, m_spriteram)
+ AM_RANGE(0xea00, 0xea3f) AM_RAM AM_BASE_MEMBER(mirax_state, m_colorram) //per-column color + bank bits for the videoram
+ AM_RANGE(0xf000, 0xf000) AM_READ_PORT("P1")
+ AM_RANGE(0xf100, 0xf100) AM_READ_PORT("P2")
+ AM_RANGE(0xf200, 0xf200) AM_READ_PORT("DSW1")
+ AM_RANGE(0xf300, 0xf300) AM_READ(unk_r) //watchdog? value is always read then discarded
+ AM_RANGE(0xf400, 0xf400) AM_READ_PORT("DSW2")
+// AM_RANGE(0xf500, 0xf500) //coin counter
+ AM_RANGE(0xf501, 0xf501) AM_WRITE(nmi_mask_w)
+// AM_RANGE(0xf506, 0xf506)
+// AM_RANGE(0xf507, 0xf507)
+ AM_RANGE(0xf800, 0xf800) AM_WRITE(mirax_sound_cmd_w)
+// AM_RANGE(0xf900, 0xf900) //sound cmd mirror? ack?
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( mirax_sound_map, AS_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x1fff) AM_ROM
+ AM_RANGE(0x8000, 0x8fff) AM_RAM
+ AM_RANGE(0xa000, 0xa000) AM_READ(soundlatch_r)
+
+ AM_RANGE(0xe000, 0xe000) AM_DEVWRITE("ay1", ay_sel) //1st ay ?
+ AM_RANGE(0xe001, 0xe001) AM_WRITENOP
+ AM_RANGE(0xe003, 0xe003) AM_WRITENOP
+
+ AM_RANGE(0xe400, 0xe400) AM_DEVWRITE("ay2", ay_sel) //2nd ay ?
+ AM_RANGE(0xe401, 0xe401) AM_WRITENOP
+ AM_RANGE(0xe403, 0xe403) AM_WRITENOP
+
+ AM_RANGE(0xf900, 0xf9ff) AM_WRITE(audio_w)
+ADDRESS_MAP_END
+
+static const gfx_layout layout16 =
+{
+ 16,16,
+ RGN_FRAC(1,3),
+ 3,
+ { RGN_FRAC(2,3),RGN_FRAC(1,3),RGN_FRAC(0,3)},
+ { 0, 1, 2, 3, 4, 5, 6, 7 ,
+ 0+8*8,1+8*8,2+8*8,3+8*8,4+8*8,5+8*8,6+8*8,7+8*8},
+ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
+ 0*8+8*8*2, 1*8+8*8*2, 2*8+8*8*2, 3*8+8*8*2, 4*8+8*8*2, 5*8+8*8*2, 6*8+8*8*2, 7*8+8*8*2},
+ 16*16
+};
+
+static const gfx_layout layout8 =
+{
+ 8,8,
+ RGN_FRAC(1,3),
+ 3,
+ { RGN_FRAC(2,3),RGN_FRAC(1,3),RGN_FRAC(0,3)},
+ { 0, 1, 2, 3, 4, 5, 6, 7},
+ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8},
+ 8*8
+};
+
+static GFXDECODE_START( mirax )
+ GFXDECODE_ENTRY( "gfx1", 0, layout8, 0, 8 )
+ GFXDECODE_ENTRY( "gfx2", 0, layout16, 0, 8 )
+GFXDECODE_END
+
+static INPUT_PORTS_START( mirax )
+ /* up/down directions are trusted according of the continue screen */
+ PORT_START("P1") //player-1
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START1 )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
+ PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1)
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
+ PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_COIN1 )
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_COIN2 )
+
+ PORT_START("P2") //player-2
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START2 )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
+ PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(2)
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
+ PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED )
+
+ PORT_START("DSW1") //dip-sw bank 1
+ PORT_DIPNAME( 0x03, 0x00, DEF_STR( Coinage ) )
+ PORT_DIPSETTING( 0x03, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x01, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( 1C_3C ) )
+ PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x30, 0x00, DEF_STR( Lives ) )
+ PORT_DIPSETTING( 0x30, "2" )
+ PORT_DIPSETTING( 0x00, "3" )
+ PORT_DIPSETTING( 0x10, "4" )
+ PORT_DIPSETTING( 0x20, "5" )
+ PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+
+ PORT_START("DSW2") //dip-sw bank 2
+ PORT_DIPNAME( 0x01, 0x01, "DSW_BANK2" )
+ PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x04, 0x04, DEF_STR( Demo_Sounds ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x08, DEF_STR( Allow_Continue ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( No ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Yes ) )
+ /* this dip makes the game to behave like attract mode, even if you insert a coin */
+ PORT_DIPNAME( 0x10, 0x00, "Auto-Play Mode (Debug)" )
+ PORT_DIPSETTING( 0x00, DEF_STR( No ) )
+ PORT_DIPSETTING( 0x10, DEF_STR( Yes ) )
+ PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+INPUT_PORTS_END
+
+
+static PALETTE_INIT( mirax )
+{
+ int i;
+
+ for (i = 0;i < machine.total_colors();i++)
+ {
+ int bit0,bit1,bit2,r,g,b;
+
+ /* red component */
+ bit0 = (color_prom[i] >> 0) & 0x01;
+ bit1 = (color_prom[i] >> 1) & 0x01;
+ bit2 = (color_prom[i] >> 2) & 0x01;
+ r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
+ /* green component */
+ bit0 = (color_prom[i] >> 3) & 0x01;
+ bit1 = (color_prom[i] >> 4) & 0x01;
+ bit2 = (color_prom[i] >> 5) & 0x01;
+ g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
+ /* blue component */
+ bit0 = (color_prom[i] >> 6) & 0x01;
+ bit1 = (color_prom[i] >> 7) & 0x01;
+ b = 0x4f * bit0 + 0xa8 * bit1;
+
+ palette_set_color(machine,i,MAKE_RGB(r,g,b));
+ }
+}
+
+static INTERRUPT_GEN( mirax_vblank_irq )
+{
+ mirax_state *state = device->machine().driver_data<mirax_state>();
+ if(state->m_nmi_mask)
+ device_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE);
+}
+
+static MACHINE_CONFIG_START( mirax, mirax_state )
+ MCFG_CPU_ADD("maincpu", Z80, 12000000/4) // ceramic potted module, encrypted z80
+ MCFG_CPU_PROGRAM_MAP(mirax_main_map)
+ MCFG_CPU_VBLANK_INT("screen",mirax_vblank_irq)
+
+ MCFG_CPU_ADD("audiocpu", Z80, 12000000/4)
+ MCFG_CPU_PROGRAM_MAP(mirax_sound_map)
+ MCFG_CPU_PERIODIC_INT(irq0_line_hold, 4*60)
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(60)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
+ MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
+ MCFG_SCREEN_SIZE(256, 256)
+ MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 1*8, 31*8-1)
+ MCFG_SCREEN_UPDATE(mirax)
+
+ MCFG_PALETTE_LENGTH(0x40)
+ MCFG_PALETTE_INIT(mirax)
+ MCFG_GFXDECODE(mirax)
+ MCFG_VIDEO_START(mirax)
+
+ MCFG_SOUND_START(mirax)
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("ay1", AY8910, 12000000/4)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
+ MCFG_SOUND_ADD("ay2", AY8910, 12000000/4)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
+MACHINE_CONFIG_END
+
+
+ROM_START( mirax )
+ ROM_REGION( 0xc000, "maincpu", ROMREGION_ERASE00 ) // put decrypted code there
+
+ ROM_REGION( 0xc000, "data_code", 0 ) // encrypted code for the main cpu
+ ROM_LOAD( "mxp5-42.rom", 0x0000, 0x4000, CRC(716410a0) SHA1(55171376e1e164b1d5e728789da6e04a3a33c172) )
+ ROM_LOAD( "mxr5-4v.rom", 0x4000, 0x4000, CRC(c9484fc3) SHA1(101c5e4b9d49d2424ad80970eb3bdb87949a9966) )
+ ROM_LOAD( "mxs5-4v.rom", 0x8000, 0x4000, CRC(e0085f91) SHA1(cf143b94048e1ebb5c899b94b500e193dfd42e18) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "mxr2-4v.rom", 0x0000, 0x2000, CRC(cd2d52dc) SHA1(0d4181dc68beac338f47a2065c7b755008877896) )
+
+ ROM_REGION( 0xc000, "gfx1", 0 )
+ ROM_LOAD( "mxe3-4v.rom", 0x0000, 0x4000, CRC(0cede01f) SHA1(c723dd8ee9dc06c94a7fe5d5b5bccc42e2181af1) )
+ ROM_LOAD( "mxh3-4v.rom", 0x4000, 0x4000, CRC(58221502) SHA1(daf5c508939b44616ca76308fc33f94d364ed587) )
+ ROM_LOAD( "mxk3-4v.rom", 0x8000, 0x4000, CRC(6dbc2961) SHA1(5880c28f1ef704fee2d625a42682c7d65613acc8) )
+
+ ROM_REGION( 0x18000, "gfx2", 0 )
+ ROM_LOAD( "mxe2-4v.rom", 0x04000, 0x4000, CRC(2cf5d8b7) SHA1(f66bce4d413a48f6ae07974870dc0f31eefa68e9) )
+ ROM_LOAD( "mxf2-4v.rom", 0x0c000, 0x4000, CRC(1f42c7fa) SHA1(33e56c6ddf7676a12f57de87ec740c6b6eb1cc8c) )
+ ROM_LOAD( "mxh2-4v.rom", 0x14000, 0x4000, CRC(cbaff4c6) SHA1(2dc4a1f51b28e98be0cfb5ab7576047c748b6728) )
+ ROM_LOAD( "mxf3-4v.rom", 0x00000, 0x4000, CRC(14b1ca85) SHA1(775a4c81a81b78490d45095af31e24c16886f0a2) )
+ ROM_LOAD( "mxi3-4v.rom", 0x08000, 0x4000, CRC(20fb2099) SHA1(da6bbd5d2218ba49b8ef98e7affdcab912f84ade) )
+ ROM_LOAD( "mxl3-4v.rom", 0x10000, 0x4000, CRC(918487aa) SHA1(47ba6914722a253f65c733b5edff4d15e73ea6c2) )
+
+ ROM_REGION( 0x0060, "proms", 0 ) // data ? encrypted roms for cpu1 ?
+ ROM_LOAD( "mra3.prm", 0x0000, 0x0020, CRC(ae7e1a63) SHA1(f5596db77c1e352ef7845465db3e54e19cd5df9e) )
+ ROM_LOAD( "mrb3.prm", 0x0020, 0x0020, CRC(e3f3d0f5) SHA1(182b06c9db5bec1e3030f705247763bd2380ba83) )
+ ROM_LOAD( "mirax.prm", 0x0040, 0x0020, NO_DUMP )
+ROM_END
+
+ROM_START( miraxa )
+ ROM_REGION( 0xc000, "maincpu", ROMREGION_ERASE00 ) // put decrypted code there
+
+ ROM_REGION( 0xc000, "data_code", 0 ) // encrypted code for the main cpu
+ ROM_LOAD( "mx_p5_43v.p5", 0x0000, 0x4000, CRC(87664903) SHA1(ccc11ecf0658e7af0db3229f60a16b1a44bd12bc) )
+ ROM_LOAD( "mx_r5_43v.r5", 0x4000, 0x4000, CRC(1ba4cd8e) SHA1(8fd22d3a4bca7c989382aaf7b08ac381a3566493) )
+ ROM_LOAD( "mx_s5_43v.s5", 0x8000, 0x4000, CRC(c58cc151) SHA1(0846e22f4da6d85c6dc29ff1472bc84b419b2289) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "mxr2-4v.rom", 0x0000, 0x2000, CRC(cd2d52dc) SHA1(0d4181dc68beac338f47a2065c7b755008877896) )
+
+ ROM_REGION( 0xc000, "gfx1", 0 )
+ ROM_LOAD( "mxe3-4v.rom", 0x0000, 0x4000, CRC(0cede01f) SHA1(c723dd8ee9dc06c94a7fe5d5b5bccc42e2181af1) )
+ ROM_LOAD( "mxh3-4v.rom", 0x4000, 0x4000, CRC(58221502) SHA1(daf5c508939b44616ca76308fc33f94d364ed587) )
+ ROM_LOAD( "mxk3-4v.rom", 0x8000, 0x4000, CRC(6dbc2961) SHA1(5880c28f1ef704fee2d625a42682c7d65613acc8) )
+
+ ROM_REGION( 0x18000, "gfx2", 0 )
+ ROM_LOAD( "mxe2-4v.rom", 0x04000, 0x4000, CRC(2cf5d8b7) SHA1(f66bce4d413a48f6ae07974870dc0f31eefa68e9) )
+ ROM_LOAD( "mxf2-4v.rom", 0x0c000, 0x4000, CRC(1f42c7fa) SHA1(33e56c6ddf7676a12f57de87ec740c6b6eb1cc8c) )
+ ROM_LOAD( "mxh2-4v.rom", 0x14000, 0x4000, CRC(cbaff4c6) SHA1(2dc4a1f51b28e98be0cfb5ab7576047c748b6728) )
+ ROM_LOAD( "mxf3-4v.rom", 0x00000, 0x4000, CRC(14b1ca85) SHA1(775a4c81a81b78490d45095af31e24c16886f0a2) )
+ ROM_LOAD( "mxi3-4v.rom", 0x08000, 0x4000, CRC(20fb2099) SHA1(da6bbd5d2218ba49b8ef98e7affdcab912f84ade) )
+ ROM_LOAD( "mxl3-4v.rom", 0x10000, 0x4000, CRC(918487aa) SHA1(47ba6914722a253f65c733b5edff4d15e73ea6c2) )
+
+ ROM_REGION( 0x0060, "proms", 0 ) // data ? encrypted roms for cpu1 ?
+ ROM_LOAD( "mra3.prm", 0x0000, 0x0020, CRC(ae7e1a63) SHA1(f5596db77c1e352ef7845465db3e54e19cd5df9e) )
+ ROM_LOAD( "mrb3.prm", 0x0020, 0x0020, CRC(e3f3d0f5) SHA1(182b06c9db5bec1e3030f705247763bd2380ba83) )
+ROM_END
+
+
+static DRIVER_INIT( mirax )
+{
+ UINT8 *DATA = machine.region("data_code")->base();
+ UINT8 *ROM = machine.region("maincpu")->base();
+ int i;
+
+ for(i=0x0000;i<0x4000;i++)
+ ROM[BITSWAP16(i, 15,14,13,12,11,10,9, 5,7,6,8, 4,3,2,1,0)] = (BITSWAP8(DATA[i], 1, 3, 7, 0, 5, 6, 4, 2) ^ 0xff);
+
+ for(i=0x4000;i<0x8000;i++)
+ ROM[BITSWAP16(i, 15,14,13,12,11,10,9, 5,7,6,8, 4,3,2,1,0)] = (BITSWAP8(DATA[i], 2, 1, 0, 6, 7, 5, 3, 4) ^ 0xff);
+
+ for(i=0x8000;i<0xc000;i++)
+ ROM[BITSWAP16(i, 15,14,13,12,11,10,9, 5,7,6,8, 4,3,2,1,0)] = (BITSWAP8(DATA[i], 1, 3, 7, 0, 5, 6, 4, 2) ^ 0xff);
+
+}
+
+GAME( 1985, mirax, 0, mirax, mirax, mirax, ROT90, "Current Technologies", "Mirax", GAME_IMPERFECT_SOUND )
+GAME( 1985, miraxa, mirax, mirax, mirax, mirax, ROT90, "Current Technologies", "Mirax (set 2)", GAME_IMPERFECT_SOUND )