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Ms. Pacman Twin (#126)
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* Added support for rare, Ms. Pacman Twin (mspactwin) simultaneous 2 player play [arcadez, grant2258, mahoneyt944]
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@arcadez2003
arcadez2003 authored Apr 10, 2024
1 parent d057fcb commit 9214026
Showing 1 changed file with 173 additions and 0 deletions.
173 changes: 173 additions & 0 deletions src/drivers/pacman.c
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Original file line number Diff line number Diff line change
Expand Up @@ -334,6 +334,7 @@ Easter eggs:
#include "sound/ay8910.h"
#include "sound/sn76496.h"

static UINT8 *decrypted_opcodes;

/*************************************
*
Expand All @@ -353,7 +354,45 @@ MACHINE_RESET( mschamp )
memory_set_bank(2, whichbank);
}

MACHINE_RESET( mspactwin )
{
static UINT8 firstrun = 0;
static UINT8 *decrypted_opcodes;
static UINT8 data_holder[0xc000];

if (!firstrun)
{
UINT8 *rom = memory_region(REGION_CPU1);
int A;

decrypted_opcodes = data_holder; /* auto_malloc(0xc000); */
for (A = 0x0000; A < 0x4000; A+=2) {

/* decode opcode */
decrypted_opcodes [A ] = BITSWAP8(rom[ A ] , 4, 5, 6, 7, 0, 1, 2, 3);
decrypted_opcodes [A+1] = BITSWAP8(rom[ A+1] ^ 0x9A, 6, 4, 5, 7, 2, 0, 3, 1);
decrypted_opcodes[0x8000+A ] = BITSWAP8(rom[0x8000+A ] , 4, 5, 6, 7, 0, 1, 2, 3);
decrypted_opcodes[0x8000+A+1] = BITSWAP8(rom[0x8000+A+1] ^ 0x9A, 6, 4, 5, 7, 2, 0, 3, 1);

/* decode operand */
rom[ A ] = BITSWAP8(rom[ A ] , 0, 1, 2, 3, 4, 5, 6, 7);
rom[ A+1] = BITSWAP8(rom[ A+1] ^ 0xA3, 2, 4, 6, 3, 7, 0, 5, 1);
rom[0x8000+A ] = BITSWAP8(rom[0x8000+A ] , 0, 1, 2, 3, 4, 5, 6, 7);
rom[0x8000+A+1] = BITSWAP8(rom[0x8000+A+1] ^ 0xA3, 2, 4, 6, 3, 7, 0, 5, 1);
}

for (A = 0x0000; A < 0x2000; A++) {

decrypted_opcodes[0x6000+A] = decrypted_opcodes[A+0x2000];
rom[0x6000+A ] = BITSWAP8(rom[0x6000+A ] , 0, 1, 2, 3, 4, 5, 6, 7);
rom[0x6000+A+1] = BITSWAP8(rom[0x6000+A+1] ^ 0xA3, 2, 4, 6, 3, 7, 0, 5, 1);
}
firstrun=1;
memory_set_opcode_base(0,decrypted_opcodes);
}
else
memory_set_opcode_base(0,decrypted_opcodes);
}

/*************************************
*
Expand Down Expand Up @@ -388,6 +427,10 @@ static INTERRUPT_GEN( pacman_interrupt )
}
}

static INTERRUPT_GEN( mspactwin_interrupt )
{
irq0_line_hold();
}

/*
The piranha board has a sync bus controler card similar to Midway's pacman. It
Expand Down Expand Up @@ -819,6 +862,48 @@ static ADDRESS_MAP_START( mspacman_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x8000, 0xbfff) AM_READWRITE(MRA8_BANK1,MWA8_ROM)
ADDRESS_MAP_END

READ8_HANDLER(mspactwin_spriteram_r)
{
return spriteram[offset];
}

static ADDRESS_MAP_START( mspactwin_readmem, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x1fff) AM_READ(MRA8_ROM)
AM_RANGE(0x2000, 0x3fff) AM_READ(MRA8_ROM)
AM_RANGE(0x4000, 0x47ff) AM_READ(MRA8_RAM) /* video and color RAM */
AM_RANGE(0x4c00, 0x4fef) AM_READ(MRA8_RAM)
AM_RANGE(0x4ff0, 0x4fff) AM_READ(mspactwin_spriteram_r) /*sprite codes at 4ff0-4fff */
AM_RANGE(0x5000, 0x5000) AM_READ(input_port_0_r) /* IN0 */
AM_RANGE(0x5040, 0x5040) AM_READ(input_port_1_r) /* IN1 */
AM_RANGE(0x5080, 0x50bf) AM_READ(input_port_4_r) /* DSW1 */
AM_RANGE(0x8000, 0xbffe) AM_READ(MRA8_ROM)
AM_RANGE(0x8000, 0xbfff) AM_READ(MRA8_ROM)
ADDRESS_MAP_END


static ADDRESS_MAP_START( mspactwin_writemem, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x1fff) AM_WRITE(MWA8_ROM)
AM_RANGE(0x2000, 0x3fff) AM_WRITE(MWA8_ROM)
AM_RANGE(0x4000, 0x43ff) AM_WRITE(mspactwin_videoram_w) AM_BASE(&videoram) AM_SIZE(&videoram_size)
AM_RANGE(0x4400, 0x47ff) AM_WRITE(pacman_colorram_w) AM_BASE(&colorram)
AM_RANGE(0x4c00, 0x4fef) AM_WRITE(MWA8_RAM)
AM_RANGE(0x4ff0, 0x4fff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
AM_RANGE(0x5000, 0x5000) AM_WRITE(interrupt_enable_w)
AM_RANGE(0x5001, 0x5001) AM_WRITE(pacman_sound_enable_w)
AM_RANGE(0x5002, 0x5002) AM_WRITE(MWA8_NOP)
AM_RANGE(0x5003, 0x5003) AM_WRITE(pacman_flipscreen_w)
AM_RANGE(0x5004, 0x5005) AM_WRITE(pacman_leds_w)
AM_RANGE(0x5006, 0x5006) AM_WRITE(mspacman_activate_rom) /* Not actually, just handy */
AM_RANGE(0x5007, 0x5007) AM_WRITE(pacman_coin_counter_w)
AM_RANGE(0x5040, 0x505f) AM_WRITE(pacman_sound_w) AM_BASE(&pacman_soundregs)
AM_RANGE(0x5060, 0x506f) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram_2)
AM_RANGE(0x50c0, 0x50c0) AM_WRITE(watchdog_reset_w)
AM_RANGE(0x8000, 0xbffe) AM_WRITE(MWA8_ROM)
AM_RANGE(0x8000, 0xbfff) AM_WRITE(MWA8_BANK1) /* Ms. Pac-Man / Ponpoko only */
AM_RANGE(0xc000, 0xc3ff) AM_WRITE(mspactwin_videoram_w) /* mirror address for video ram, */
AM_RANGE(0xc400, 0xc7ef) AM_WRITE(pacman_colorram_w) /* used to display HIGH SCORE and CREDITS */
ADDRESS_MAP_END


static ADDRESS_MAP_START( woodpek_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x3fff) AM_ROM
Expand Down Expand Up @@ -1270,6 +1355,59 @@ INPUT_PORTS_START( mspacman )
PORT_DIPSETTING( 0x04, "Enabled with Button" )
INPUT_PORTS_END

INPUT_PORTS_START( mspactwin )
PORT_START /* IN0 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_SPECIAL )
PORT_DIPNAME( 0x10, 0x10, "Speed" ) //Jama
PORT_DIPSETTING( 0x10, "Slow" )
PORT_DIPSETTING( 0x00, "Fast" )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SERVICE1 )

PORT_START /* IN1 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_PLAYER(2)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_PLAYER(2)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_PLAYER(2)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_PLAYER(2)
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_SPECIAL )
PORT_SERVICE( 0x10, IP_ACTIVE_LOW )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
PORT_DIPNAME(0x80, 0x80, "Rack Test (Cheat)" ) PORT_CODE(KEYCODE_F1)
PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )

/* multiplexed player inputs */
PORT_START /* P1 */
PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

PORT_START /* P2 */
PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNUSED )

PORT_START /* DSW1 */
PORT_DIPNAME( 0x03, 0x01, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x03, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x00, "Free Play (Invalid)" ) /* causes watchdog reset at title screen, see comments above */
PORT_SERVICE( 0x08, IP_ACTIVE_LOW )
PORT_DIPNAME( 0x0c, 0x08, DEF_STR( Lives ) )
PORT_DIPSETTING( 0x00, "1" )
PORT_DIPSETTING( 0x04, "2" )
PORT_DIPSETTING( 0x08, "3" )
PORT_DIPSETTING( 0x0c, "5" )
PORT_DIPNAME( 0x30, 0x00, DEF_STR( Bonus_Life ) )
PORT_DIPSETTING( 0x00, "10000" )
PORT_DIPSETTING( 0x10, "15000" )
PORT_DIPSETTING( 0x20, "20000" )
PORT_DIPSETTING( 0x30, "None" )
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END

/* Same as 'mspacman', but no fake input port */
INPUT_PORTS_START( mspacpls )
Expand Down Expand Up @@ -2935,6 +3073,18 @@ static MACHINE_DRIVER_START( mspacman )
MDRV_MACHINE_RESET(mspacman)
MACHINE_DRIVER_END

static MACHINE_DRIVER_START( mspactwin )

/* basic machine hardware */
MDRV_IMPORT_FROM(pacman)

MDRV_CPU_MODIFY("main")
MDRV_CPU_PROGRAM_MAP(mspactwin_readmem,mspactwin_writemem)
MDRV_CPU_VBLANK_INT(mspactwin_interrupt,1)

MDRV_MACHINE_RESET(mspactwin)
MACHINE_DRIVER_END


static MACHINE_DRIVER_START( woodpek )

Expand Down Expand Up @@ -4789,6 +4939,26 @@ ROM_START( rocktrv2 )
ROM_LOAD( "18.aux", 0x3c000, 0x4000, CRC(feb195fd) SHA1(5677d31e526cc7752254e9af0d694f05bc6bc907) )
ROM_END

ROM_START( mspactwin )
ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for encrypted code */
ROM_LOAD( "m27256.bin", 0x0000, 0x4000, CRC(77a99184) SHA1(9dcb1a1b78994aa401d653bec571cb3e6f9d900b) )
ROM_CONTINUE(0x8000,0x4000)

ROM_REGION( 0x2000, REGION_GFX1, 0 )
ROM_LOAD( "4__2716.5d", 0x0000, 0x0800, CRC(483c1d1c) SHA1(d3b967c6a71cf02b825d800f56d5268f2e0e60eb) )
ROM_LOAD( "2__2716.5g", 0x0800, 0x0800, CRC(c08d73a2) SHA1(072e57641ac5ae3c47b4f8d9c55e3da5b35489ea) )
ROM_LOAD( "3__2516.5f", 0x1000, 0x0800, CRC(22b0188a) SHA1(a9ed9ca8b36a60081fd364abc9bc23963932cc0b) )
ROM_LOAD( "1__2516.5j", 0x1800, 0x0800, CRC(0a8c46a0) SHA1(e38e9e3258ab26fcbc6fdf258844e364f4b165ab) )

ROM_REGION( 0x0120, REGION_PROMS, 0 )
ROM_LOAD( "mb7051.8h", 0x0000, 0x0020, CRC(ff344446) SHA1(45eb37533da8912645a089b014f3b3384702114a) )
ROM_LOAD( "82s129.4a", 0x0020, 0x0100, CRC(a8202d0d) SHA1(2a615211c33f3ef75af14e4bbedd2a700100be29) )

ROM_REGION( 0x0200, REGION_SOUND1, 0 ) /* Sound PROMs */
ROM_LOAD( "82s126.1m", 0x0000, 0x0100, CRC(a9cc86bf) SHA1(bbcec0570aeceb582ff8238a4bc8546a23430081) )
ROM_LOAD( "82s126.3m", 0x0100, 0x0100, CRC(77245b66) SHA1(0c4d0bee858b97632411c440bea6948a74759746) )
ROM_END

/*************************************
*
* Driver initialization
Expand Down Expand Up @@ -5089,3 +5259,6 @@ GAME( 1985, porky, 0, porky, porky, porky, ROT90, "Shinkai I
GAME( 1986, rocktrv2, 0, rocktrv2, rocktrv2, rocktrv2, ROT90, "Triumph Software Inc.", "MTV Rock-N-Roll Trivia (Part 2)", GAME_SUPPORTS_SAVE )
GAME( 1986, bigbucks, 0, bigbucks, bigbucks, 0, ROT90, "Dynasoft Inc.", "Big Bucks", GAME_SUPPORTS_SAVE )
GAME( 1995, mschamp, mspacman, mschamp, mschamp, 0, ROT90, "hack", "Ms. Pacman Champion Edition / Super Zola Pac Gal", GAME_SUPPORTS_SAVE )

/* Simultaneous 2 player hack of Ms Pac-Man */
GAME( 1992, mspactwin, 0, mspactwin, mspactwin, 0, ROT90, "SUSILU", "Ms. Pac-Man Twin (Argentina)", GAME_SUPPORTS_SAVE )

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