diff options
Diffstat (limited to 'src/mame/drivers/supertnk.c')
-rw-r--r-- | src/mame/drivers/supertnk.c | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/src/mame/drivers/supertnk.c b/src/mame/drivers/supertnk.c new file mode 100644 index 00000000000..8bd39accf9c --- /dev/null +++ b/src/mame/drivers/supertnk.c @@ -0,0 +1,487 @@ +/*************************************************************************** + +Super Tank +(c) 1981 Video Games GmbH + +Reverse-engineering and MAME driver by Norbert Kehrer (December 2003). + +**************************************************************************** + + +Hardware: +--------- + +CPU TMS9980 (Texas Instruments) +Sound chip AY-3-8910 + + +Memory map: +----------- + +>0000 - >07ff Fixed ROM +>0800 - >17ff Bank-switched ROM +>1800 - >1bff RAM +>1efc Input port 1 +>1efd Input port 2 +>1efe Read: DIP switch port 1 + Write: Control port of AY-3-8910 sound chip +>1eff Read: DIP switch port 2 + Write: Data port of AY-3-8910 +>2000 - >3fff Video RAM (CPU view of it, in reality there are 24 KB on the video board) + + +Input ports: +------------ + +Input port 0, mapped to memory address 0x1efc: +7654 3210 +0 Player 2 Right + 0 Player 2 Left + 0 Player 2 Down + 0 Player 2 Up + 0 Player 1 Right + 0 Player 1 Left + 0 Player 1 Down + 0 Player 1 Up + +Input port 1, mapped to memory address 0x1efd: +7654 3210 +0 Player 2 Fire + 0 Player 1 Fire + 0 ?? + 0 ?? + 0 Start 1 player game + 0 Start 2 players game + 0 Coin (strobe) + 0 ?? + + +DIP switch ports: +----------------- + +DIP switch port 1, mapped to memory address 0x1efe: +7654 3210 +0 Not used (?) + 0 Not used (?) + 0 Tanks per player: 1 = 5 tanks, 0 = 3 tanks + 0 Extra tank: 1 = at 10,000, 0 = at 15,000 pts. + 000 Coinage + 0 Not used (?) + +DIP switch port 2, mapped to memory address 0x1eff: +7654 3210 +1 ?? + 1 ?? + 1 ?? + 1 ?? + 1 ?? + 1 ?? + 1 ?? + 1 ?? + + +CRU lines: +---------- + +>400 Select bitplane for writes into video RAM (bit 0) +>401 Select bitplane for writes into video RAM (bit 1) +>402 ROM bank selector (bit 0) +>404 ROM bank selector (bit 1) +>406 Interrupt acknowledge (clears interrupt line) +>407 Watchdog reset (?) +>b12 Unknown, maybe some special-hardware sound effect or lights blinking (?) +>b13 Unknown, maybe some special-hardware sound effect or lights blinking (?) + +***************************************************************************/ + + +#include "driver.h" +#include "sound/ay8910.h" + + + +/* the color PROM is 32 bytes, but it is a repeating + every 8 bytes */ +#define NUM_PENS (8) + + +static UINT8 *supertnk_videoram[3]; +static size_t supertnk_videoram_size; +static UINT8 supertnk_rom_bank; +static UINT8 supertnk_bitplane_select; + + + +/************************************* + * + * Memory banking + * + *************************************/ + +static WRITE8_HANDLER( supertnk_bankswitch_0_w ) +{ + offs_t bank_address; + + supertnk_rom_bank = (supertnk_rom_bank & 0x02) | ((data << 0) & 0x01); + + bank_address = 0x10000 + (supertnk_rom_bank * 0x1000); + + memory_set_bankptr(1, &memory_region(REGION_CPU1)[bank_address]); +} + + +static WRITE8_HANDLER( supertnk_bankswitch_1_w ) +{ + offs_t bank_address; + + supertnk_rom_bank = (supertnk_rom_bank & 0x01) | ((data << 1) & 0x02); + + bank_address = 0x10000 + (supertnk_rom_bank * 0x1000); + + memory_set_bankptr(1, &memory_region(REGION_CPU1)[bank_address]); +} + + + +/************************************* + * + * Interrupt generation + * + *************************************/ + +static INTERRUPT_GEN( supertnk_interrupt ) +{ + /* On a TMS9980, a 6 on the interrupt bus means a level 4 interrupt */ + cpunum_set_input_line_and_vector(0, 0, ASSERT_LINE, 6); +} + + +static WRITE8_HANDLER( supertnk_interrupt_ack_w ) +{ + cpunum_set_input_line(0, 0, CLEAR_LINE); +} + + + +/************************************* + * + * Video system + * + *************************************/ + +static VIDEO_START( supertnk ) +{ + supertnk_videoram[0] = auto_malloc(supertnk_videoram_size); + supertnk_videoram[1] = auto_malloc(supertnk_videoram_size); + supertnk_videoram[2] = auto_malloc(supertnk_videoram_size); +} + + +static WRITE8_HANDLER( supertnk_videoram_w ) +{ + if (supertnk_bitplane_select > 2) + { + supertnk_videoram[0][offset] = 0; + supertnk_videoram[1][offset] = 0; + supertnk_videoram[2][offset] = 0; + } + else + { + supertnk_videoram[supertnk_bitplane_select][offset] = data; + } +} + + +static READ8_HANDLER( supertnk_videoram_r ) +{ + UINT8 ret = 0x00; + + if (supertnk_bitplane_select < 3) + ret = supertnk_videoram[supertnk_bitplane_select][offset]; + + return ret; +} + + +static WRITE8_HANDLER( supertnk_bitplane_select_0_w ) +{ + supertnk_bitplane_select = (supertnk_bitplane_select & 0x02) | ((data << 0) & 0x01); +} + + +static WRITE8_HANDLER( supertnk_bitplane_select_1_w ) +{ + supertnk_bitplane_select = (supertnk_bitplane_select & 0x01) | ((data << 1) & 0x02); +} + + +static void get_pens(pen_t *pens) +{ + offs_t i; + + for (i = 0; i < NUM_PENS; i++) + { + UINT8 data = memory_region(REGION_PROMS)[i]; + + pens[i] = MAKE_RGB(pal1bit(data >> 2), pal1bit(data >> 5), pal1bit(data >> 6)); + } +} + + +static VIDEO_UPDATE( supertnk ) +{ + pen_t pens[NUM_PENS]; + offs_t offs; + + get_pens(pens); + + for (offs = 0; offs < supertnk_videoram_size; offs++) + { + int i; + + UINT8 y = offs >> 5; + UINT8 x = offs << 3; + + UINT8 data0 = supertnk_videoram[0][offs]; + UINT8 data1 = supertnk_videoram[1][offs]; + UINT8 data2 = supertnk_videoram[2][offs]; + + for (i = 0; i < 8; i++) + { + UINT8 color = ((data0 & 0x80) >> 5) | ((data1 & 0x80) >> 6) | ((data2 & 0x80) >> 7); + *BITMAP_ADDR32(bitmap, y, x) = pens[color]; + + data0 = data0 << 1; + data1 = data1 << 1; + data2 = data2 << 1; + + x = x + 1; + } + } + + return 0; +} + + + +/************************************* + * + * Machine reset + * + *************************************/ + +static MACHINE_RESET( supertnk ) +{ + supertnk_bankswitch_0_w(0, 0); + supertnk_bankswitch_1_w(0, 0); + + supertnk_bitplane_select_0_w(0, 0); + supertnk_bitplane_select_1_w(0, 0); +} + + + +/************************************* + * + * Memory handlers + * + *************************************/ + +static ADDRESS_MAP_START( supertnk_map, ADDRESS_SPACE_PROGRAM, 8 ) + AM_RANGE(0x0000, 0x07ff) AM_ROM + AM_RANGE(0x0800, 0x17ff) AM_ROMBANK(1) + AM_RANGE(0x1800, 0x1bff) AM_RAM + AM_RANGE(0x1efc, 0x1efc) AM_READ(input_port_0_r) + AM_RANGE(0x1efd, 0x1efd) AM_READ(input_port_1_r) + AM_RANGE(0x1efe, 0x1efe) AM_READWRITE(input_port_2_r, AY8910_control_port_0_w) + AM_RANGE(0x1eff, 0x1eff) AM_READWRITE(input_port_3_r, AY8910_write_port_0_w) + AM_RANGE(0x2000, 0x3fff) AM_READWRITE(supertnk_videoram_r, supertnk_videoram_w) AM_SIZE(&supertnk_videoram_size) +ADDRESS_MAP_END + + + +/************************************* + * + * Port handlers + * + *************************************/ + +static ADDRESS_MAP_START( supertnk_io_map, ADDRESS_SPACE_IO, 8 ) + AM_RANGE(0x0000, 0x0000) AM_WRITE(MWA8_NOP) + AM_RANGE(0x0400, 0x0400) AM_WRITE(supertnk_bitplane_select_0_w) + AM_RANGE(0x0401, 0x0401) AM_WRITE(supertnk_bitplane_select_1_w) + AM_RANGE(0x0402, 0x0402) AM_WRITE(supertnk_bankswitch_0_w) + AM_RANGE(0x0404, 0x0404) AM_WRITE(supertnk_bankswitch_1_w) + AM_RANGE(0x0406, 0x0406) AM_WRITE(supertnk_interrupt_ack_w) + AM_RANGE(0x0407, 0x0407) AM_WRITE(watchdog_reset_w) +ADDRESS_MAP_END + + + +/************************************* + * + * Port definitions + * + *************************************/ + +static INPUT_PORTS_START( supertnk ) + PORT_START + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) + + PORT_START + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(1) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 ) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 ) + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) + + PORT_START + PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x01, DEF_STR( On ) ) + PORT_DIPNAME( 0x0e, 0x02, DEF_STR( Coinage ) ) + PORT_DIPSETTING( 0x02, DEF_STR( 1C_1C ) ) + PORT_DIPSETTING( 0x0e, DEF_STR( 1C_2C ) ) + PORT_DIPSETTING( 0x0c, DEF_STR( 1C_3C ) ) + PORT_DIPSETTING( 0x0a, DEF_STR( 1C_4C ) ) + PORT_DIPSETTING( 0x08, DEF_STR( 1C_5C ) ) + PORT_DIPSETTING( 0x06, DEF_STR( 1C_6C ) ) + PORT_DIPSETTING( 0x04, DEF_STR( 1C_7C ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) ) + PORT_DIPNAME( 0x10, 0x00, DEF_STR( Bonus_Life ) ) + PORT_DIPSETTING( 0x00, "at 15,000 points" ) + PORT_DIPSETTING( 0x10, "at 10,000 points" ) + PORT_DIPNAME( 0x20, 0x00, DEF_STR( Lives ) ) + PORT_DIPSETTING( 0x00, "3" ) + PORT_DIPSETTING( 0x20, "5" ) + PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x40, DEF_STR( On ) ) + PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x80, DEF_STR( On ) ) + + PORT_START + PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x01, DEF_STR( On ) ) + PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x02, DEF_STR( On ) ) + PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x04, DEF_STR( On ) ) + PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x08, DEF_STR( On ) ) + PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x10, DEF_STR( On ) ) + PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x20, DEF_STR( On ) ) + PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x40, DEF_STR( On ) ) + PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x80, DEF_STR( On ) ) +INPUT_PORTS_END + + + +/************************************* + * + * Machine driver + * + *************************************/ + +static MACHINE_DRIVER_START( supertnk ) + + /* basic machine hardware */ + MDRV_CPU_ADD(TMS9980, 2598750) /* ? to which frequency is the 20.79 Mhz crystal mapped down? */ + MDRV_CPU_PROGRAM_MAP(supertnk_map,0) + MDRV_CPU_IO_MAP(supertnk_io_map,0) + MDRV_CPU_VBLANK_INT(supertnk_interrupt,1) + + MDRV_MACHINE_RESET(supertnk) + + /* video hardware */ + MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER) + MDRV_VIDEO_START(supertnk) + MDRV_VIDEO_UPDATE(supertnk) + + MDRV_SCREEN_ADD("main", 0) + MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32) + MDRV_SCREEN_SIZE(32*8, 32*8) + MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1) + MDRV_SCREEN_REFRESH_RATE(60) + MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION) + + /* audio hardware */ + MDRV_SPEAKER_STANDARD_MONO("mono") + + MDRV_SOUND_ADD(AY8910, 2000000) + MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) +MACHINE_DRIVER_END + + + +/************************************* + * + * ROM definition + * + *************************************/ + +ROM_START( supertnk ) + ROM_REGION( 0x14000, REGION_CPU1, 0 ) /* 64k for TMS9980 code + 16k of ROM */ + ROM_LOAD( "supertan.2d", 0x00000, 0x0800, CRC(1656a2c1) SHA1(1d49945aed105003a051cfbf646af7a4be1b7e86) ) + ROM_LOAD( "supertnk.3d", 0x10800, 0x0800, CRC(8b023a9a) SHA1(1afdc8d75f2ca04153bac20c0e3e123e2a7acdb7) ) + ROM_CONTINUE( 0x10000, 0x0800) + ROM_LOAD( "supertnk.4d", 0x11800, 0x0800, CRC(b8249e5c) SHA1(ef4bb714b0c1b97890a067f05fc50ab3426ce37f) ) + ROM_CONTINUE( 0x11000, 0x0800) + ROM_LOAD( "supertnk.8d", 0x12800, 0x0800, CRC(d8175a4f) SHA1(cba7b426773ac86c81a9eac81087a2db268cd0f9) ) + ROM_CONTINUE( 0x12000, 0x0800) + ROM_LOAD( "supertnk.9d", 0x13800, 0x0800, CRC(a34a494a) SHA1(9b7f0560e9d569ee25eae56f31886d50a3153dcc) ) + ROM_CONTINUE( 0x13000, 0x0800) + + ROM_REGION( 0x0060, REGION_PROMS, 0 ) + /* color PROM */ + ROM_LOAD( "supertnk.clr", 0x0000, 0x0020, CRC(9ae1faee) SHA1(19de4bb8bc389d98c8f8e35c755fad96e1a6a0cd) ) + /* unknown - sync? */ + ROM_LOAD( "supertnk.s", 0x0020, 0x0020, CRC(91722fcf) SHA1(f77386014b459cc151d2990ac823b91c04e8d319) ) + /* unknown - sync? */ + ROM_LOAD( "supertnk.t", 0x0040, 0x0020, CRC(154390bd) SHA1(4dc0fd7bd8999d2670c8d93aaada835d2a84d4db) ) +ROM_END + + + +/************************************* + * + * Game drivers + * + *************************************/ + +static DRIVER_INIT( supertnk ) +{ + /* decode the TMS9980 ROMs */ + offs_t offs; + + for (offs = 0; offs < memory_region_length(REGION_CPU1); offs++) + { + memory_region(REGION_CPU1)[offs] = BITSWAP8(memory_region(REGION_CPU1)[offs],0,1,2,3,4,5,6,7); + }; +} + + +GAME( 1981, supertnk, 0, supertnk, supertnk, supertnk, ROT90, "Video Games GmbH", "Super Tank", 0 ) |