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-rw-r--r--src/mame/drivers/grchamp.c790
1 files changed, 790 insertions, 0 deletions
diff --git a/src/mame/drivers/grchamp.c b/src/mame/drivers/grchamp.c
new file mode 100644
index 00000000000..9a3ff5d01ce
--- /dev/null
+++ b/src/mame/drivers/grchamp.c
@@ -0,0 +1,790 @@
+/***************************************************************************
+
+ Grand Champion
+ (C) 1981 Taito
+
+ MAME driver by Ernesto Corvi and Phil Stroffolino
+
+****************************************************************************
+
+ Known Issues:
+
+ - pc3259 handling (for collision detection) is not accurate.
+ Collision detection does work, but there are bits which define
+ the type of collision (and determine whether a pit stop is
+ required) that I don't know how to handle.
+
+ - sound: missing engine noise
+
+ - "radar" is probably wrong
+
+ - LED and tachometer display are missing/faked
+ Note that a dipswitch setting allows score to be displayed
+ onscreen, but there's no equivalent for tachometer.
+
+ Notes:
+
+ - The object of the game is to avoid the opposing cars.
+
+ - The player has to drive through Dark Tunnels, Rain,
+ Lightning, Sleet, Snow, and a Track that suddenly
+ divides to get to the Finish Line first.
+
+ - "GRAND CHAMPION" has a Radar Feature which enables
+ the Player to see his position relative to the other
+ cars.
+
+ - A Rank Feature is also provided which shows the
+ Player's numerical rank all through the race.
+
+ - The Speech Feature enhances the game play.
+
+***************************************************************************/
+
+#include "driver.h"
+#include "cpu/z80/z80.h"
+#include "sound/ay8910.h"
+#include "grchamp.h"
+
+
+
+/*************************************
+ *
+ * Constants
+ *
+ *************************************/
+
+#define MASTER_CLOCK (18432000)
+#define SOUND_CLOCK (6000000)
+
+#define PIXEL_CLOCK (MASTER_CLOCK/3)
+
+#define HTOTAL (384)
+#define HBEND (0)
+#define HBSTART (256)
+
+#define VTOTAL (264)
+#define VBEND (16)
+#define VBSTART (240)
+
+
+
+/*************************************
+ *
+ * Machine setup
+ *
+ *************************************/
+
+static MACHINE_START( grchamp )
+{
+ /* if the coin system is 1 way, lock Coin B (Page 40) */
+ if (readinputport(1) & 0x10)
+ coin_lockout_w(1, 1);
+}
+
+
+
+/*************************************
+ *
+ * Interrupt generation
+ *
+ *************************************/
+
+static INTERRUPT_GEN( grchamp_cpu0_interrupt )
+{
+ grchamp_state *state = Machine->driver_data;
+ int cpu = cpu_getactivecpu();
+
+ if (state->cpu0_out[0] & 0x01)
+ cpunum_set_input_line(cpu, 0, ASSERT_LINE);
+}
+
+
+static INTERRUPT_GEN( grchamp_cpu1_interrupt )
+{
+ grchamp_state *state = Machine->driver_data;
+ int cpu = cpu_getactivecpu();
+
+ if (state->cpu1_out[4] & 0x01)
+ cpunum_set_input_line(cpu, 0, ASSERT_LINE);
+}
+
+
+
+/*************************************
+ *
+ * Main CPU outputs
+ *
+ *************************************/
+
+static WRITE8_HANDLER( cpu0_outputs_w )
+{
+ grchamp_state *state = Machine->driver_data;
+ UINT8 diff = data ^ state->cpu0_out[offset];
+ state->cpu0_out[offset] = data;
+
+ switch (offset)
+ {
+ case 0x00: /* OUT0 */
+
+ /* bit 0: low = clear IRQ on main CPU */
+ /* bit 1: /HTCLR = clear collision detect */
+ /* bit 4: HEAD LAMP */
+ /* bit 5: CHANGE */
+ /* bit 6: FOG OUT */
+ /* bit 7: RADARON */
+ if ((diff & 0x01) && !(data & 0x01))
+ cpunum_set_input_line(0, 0, CLEAR_LINE);
+ if ((diff & 0x02) && !(data & 0x02))
+ state->collide = state->collmode = 0;
+ break;
+
+ case 0x01: /* OUT1 */
+ /* connects to pc3259, pin 23 (read collision data?) */
+ state->collmode++;
+ break;
+
+ case 0x02: /* OUT2 */
+ /* bit 0-7: MYDH (car X position) */
+ break;
+
+ case 0x03: /* OUT3 */
+ /* bit 0-7: MYDV (car Y position) */
+ break;
+
+ case 0x04: /* OUT4 */
+ /* bit 0-3: player car tile select */
+ /* bit 4-7: rain tile select */
+ break;
+
+ case 0x07: /* OUT7 */
+ /* bit 0-7: rain Y position */
+ break;
+
+ case 0x08: /* OUT8 */
+ /* bit 0-7: rain X position */
+ break;
+
+ case 0x09: /* OUT9 */
+ /* bit 0-3: n/c */
+ /* bit 4: coin lockout */
+ /* bit 5: Game Over lamp */
+ /* bit 6-7: n/c */
+ coin_lockout_global_w((data >> 4) & 1);
+ output_set_value("led0", (~data >> 5) & 1);
+ break;
+
+ case 0x0a: /* OUT10 */
+ /* bit 0: n/c */
+ /* bit 1: G-12 */
+ /* bit 2: G-S */
+ /* bit 3: G-16 */
+ /* bit 4: G-Y */
+ /* bit 5: n/c */
+ /* bit 6: G-Z */
+ if (diff)
+ mame_printf_debug("OUT10=%02X\n", data);
+ break;
+
+ case 0x0d: /* OUT13 */
+ watchdog_reset();
+ break;
+
+ case 0x0e: /* OUT14 */
+ /* O-21 connector */
+ soundlatch_w(0, data);
+ cpunum_set_input_line(2, INPUT_LINE_NMI, PULSE_LINE);
+ break;
+ }
+}
+
+
+static WRITE8_HANDLER( led_board_w )
+{
+ static const UINT8 ls247_map[16] =
+ { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x58,0x4c,0x62,0x69,0x78,0x00 };
+ grchamp_state *state = Machine->driver_data;
+
+ switch (offset)
+ {
+ case 0x00:
+ state->ledlatch = (state->ledlatch & 0xff00) | (data << 0);
+ break;
+
+ case 0x04:
+ state->ledlatch = (state->ledlatch & 0x00ff) | (data << 8);
+ break;
+
+ case 0x08:
+ state->ledaddr = data & 0x0f;
+ break;
+
+ case 0x0c:
+ state->ledram[state->ledaddr & 0x07] = state->ledlatch;
+ output_set_digit_value(state->ledaddr & 0x07, ls247_map[state->ledram[state->ledaddr & 0x07] & 0x0f]);
+ /*
+ ledram[0] & 0x0f = score LSD
+ ledram[1] & 0x0f = score
+ ledram[2] & 0x0f = score
+ ledram[3] & 0x0f = score
+ ledram[4] & 0x0f = score MSD
+ ledram[5] & 0x0f = time LSD
+ ledram[6] & 0x0f = time MSD
+ ledram[7] & 0x0f = ???
+ */
+ break;
+ }
+}
+
+
+
+/*************************************
+ *
+ * Sub CPU outputs
+ *
+ *************************************/
+
+static WRITE8_HANDLER( cpu1_outputs_w )
+{
+ grchamp_state *state = Machine->driver_data;
+ UINT8 diff = data ^ state->cpu1_out[offset];
+ state->cpu1_out[offset] = data;
+
+ switch (offset)
+ {
+ case 0x00: /* OUT0 */
+ /* bit 0-7: left/right synk bus xscroll LSBs */
+ break;
+
+ case 0x01: /* OUT1 */
+ /* bit 0: left/right synk bus xscroll MSB */
+ break;
+
+ case 0x02: /* OUT2 */
+ /* bit 0-7: left synk bus yscroll */
+ break;
+
+ case 0x03: /* OUT3 */
+ /* bit 0-3: analog tachometer output */
+ /* bit 4: palette MSB */
+ /* bit 5: disable the 256H line in the center tilemap */
+ break;
+
+ case 0x04: /* OUT4 */
+ /* bit 0: interrupt enable for CPU 1 */
+ if ((diff & 0x01) && !(data & 0x01))
+ cpunum_set_input_line(1, 0, CLEAR_LINE);
+ break;
+
+ case 0x05: /* OUT5 - unused */
+ break;
+
+ case 0x06: /* OUT6 - unused */
+ break;
+
+ case 0x07: /* OUT7 */
+ /* bit 0-7: right synk bus yscroll */
+ break;
+
+ case 0x08: /* OUT8 */
+ /* bit 0-7: latches data to main CPU input port 2 */
+ state->comm_latch = data;
+ break;
+
+ case 0x09: /* OUT9 */
+ /* bit 0-7: center synk bus xscroll LSBs */
+ break;
+
+ case 0x0a: /* OUTA */
+ /* bit 0: center synk bus xscroll MSB */
+ break;
+
+ case 0x0b: /* OUTB */
+ /* bit 0-7: center synk bus yscroll */
+ break;
+
+ case 0x0c: /* OUTC */
+ /* bit 0: FOG */
+ /* bit 1: IDLING */
+ /* bit 2-4: ATTACK UP 1-3 */
+ /* bit 5-6: SIFT 1-2 */
+ /* bit 7: ENGINE CS */
+ discrete_sound_w(GRCHAMP_ENGINE_CS_EN, data & 0x80);
+ discrete_sound_w(GRCHAMP_SIFT_DATA, (data >> 5) & 0x03);
+ discrete_sound_w(GRCHAMP_ATTACK_UP_DATA, (data >> 2) & 0x07);
+ discrete_sound_w(GRCHAMP_IDLING_EN, data & 0x02);
+ discrete_sound_w(GRCHAMP_FOG_EN, data & 0x01);
+ break;
+
+ case 0x0d: /* OUTD */
+ /* bit 0-3: ATTACK SPEED 1-4 */
+ /* bit 4-7: PLAYER SPEED 1-4 */
+ discrete_sound_w(GRCHAMP_PLAYER_SPEED_DATA, (data >> 4) & 0x0f);
+ discrete_sound_w(GRCHAMP_ATTACK_SPEED_DATA, data & 0x0f);
+ break;
+
+ default:
+ /* OUTE - Page 48: goes to connector Q-27 */
+ /* OUTF - unused */
+ break;
+ }
+}
+
+
+
+/*************************************
+ *
+ * CPU 0 Inputs
+ *
+ *************************************/
+
+INLINE UINT8 get_pc3259_bits(grchamp_state *state, int offs)
+{
+ int bits;
+
+ /* force a partial update to the current position */
+ video_screen_update_partial(0, video_screen_get_vpos(0));
+
+ /* get the relevant 4 bits */
+ bits = (state->collide >> (offs*4)) & 0x0f;
+
+ /* replicate to both nibbles */
+ return bits | (bits << 4);
+}
+
+
+static READ8_HANDLER( pc3259_0_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return get_pc3259_bits(state, 0);
+}
+
+
+static READ8_HANDLER( pc3259_1_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return get_pc3259_bits(state, 1);
+}
+
+
+static READ8_HANDLER( pc3259_2_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return get_pc3259_bits(state, 2);
+}
+
+
+static READ8_HANDLER( pc3259_3_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return get_pc3259_bits(state, 3);
+}
+
+
+
+/*************************************
+ *
+ * Inter-CPU communication
+ *
+ *************************************/
+
+static READ8_HANDLER( sub_to_main_comm_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return state->comm_latch;
+}
+
+
+static TIMER_CALLBACK( main_to_sub_comm_sync_w )
+{
+ grchamp_state *state = machine->driver_data;
+ int offset = param >> 8;
+ state->comm_latch2[offset & 3] = param;
+}
+
+
+static WRITE8_HANDLER( main_to_sub_comm_w )
+{
+ timer_call_after_resynch(data | (offset << 8), main_to_sub_comm_sync_w);
+}
+
+
+static READ8_HANDLER( main_to_sub_comm_r )
+{
+ grchamp_state *state = Machine->driver_data;
+ return state->comm_latch2[offset];
+}
+
+
+
+/*************************************
+ *
+ * Sound port handlers
+ *
+ *************************************/
+
+static WRITE8_HANDLER( grchamp_portA_0_w )
+{
+ discrete_sound_w(GRCHAMP_A_DATA, data);
+}
+
+static WRITE8_HANDLER( grchamp_portB_0_w )
+{
+ discrete_sound_w(GRCHAMP_B_DATA, 255-data);
+}
+
+static WRITE8_HANDLER( grchamp_portA_2_w )
+{
+ /* A0/A1 modify the output of AY8910 #2 */
+ /* A7 contributes to the discrete logic hanging off of AY8910 #0 */
+}
+static WRITE8_HANDLER( grchamp_portB_2_w )
+{
+ /* B0 connects elsewhere */
+}
+
+
+
+/*************************************
+ *
+ * Sound interfaces
+ *
+ *************************************/
+
+static struct AY8910interface ay8910_interface_1 =
+{
+ 0,
+ 0,
+ grchamp_portA_0_w,
+ grchamp_portB_0_w
+};
+
+static struct AY8910interface ay8910_interface_3 =
+{
+ 0,
+ 0,
+ grchamp_portA_2_w,
+ grchamp_portB_2_w
+};
+
+
+
+/*************************************
+ *
+ * Graphics Layouts
+ *
+ *************************************/
+
+static const gfx_layout sprite_layout =
+{
+ 16,16,
+ RGN_FRAC(1,2),
+ 2,
+ { 0,RGN_FRAC(1,2) },
+ { STEP8(0,1),STEP8(64,1) },
+ { STEP8(0,8),STEP8(128,8) },
+ 16*16
+};
+
+static const gfx_layout tile_layout =
+{
+ 8,8,
+ RGN_FRAC(1,2),
+ 4,
+ { 0,4,RGN_FRAC(1,2),RGN_FRAC(1,2)+4 },
+ { STEP4(0,1),STEP4(8*8+0,1) },
+ { STEP8(0,8) },
+ 16*8
+};
+
+static GFXDECODE_START( grchamp )
+ GFXDECODE_ENTRY( REGION_GFX1, 0x0000, gfx_8x8x2_planar, 0, 8 )
+ GFXDECODE_ENTRY( REGION_GFX2, 0x0000, tile_layout, 0, 16 )
+ GFXDECODE_ENTRY( REGION_GFX3, 0x0000, tile_layout, 0, 16 )
+ GFXDECODE_ENTRY( REGION_GFX4, 0x0000, tile_layout, 0, 16 )
+ GFXDECODE_ENTRY( REGION_GFX1, 0x0000, sprite_layout, 0, 32 )
+GFXDECODE_END
+
+
+
+/*************************************
+ *
+ * Address maps
+ *
+ *************************************/
+
+/* complete memory map derived from schematics */
+static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x3fff) AM_ROM
+ AM_RANGE(0x4000, 0x43ff) AM_MIRROR(0x0400) AM_RAM
+ AM_RANGE(0x4800, 0x4bff) AM_MIRROR(0x0400) AM_RAM AM_BASE_MEMBER(grchamp_state, radarram)
+ AM_RANGE(0x5000, 0x53ff) AM_MIRROR(0x0400) AM_RAM AM_BASE_MEMBER(grchamp_state, videoram)
+ AM_RANGE(0x5800, 0x58ff) AM_MIRROR(0x0700) AM_RAM AM_BASE_MEMBER(grchamp_state, spriteram)
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( main_portmap, ADDRESS_SPACE_IO, 8 )
+ ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
+ AM_RANGE(0x00, 0x00) AM_MIRROR(0x78) AM_READ_PORT("ACCEL")
+ AM_RANGE(0x02, 0x02) AM_MIRROR(0x78) AM_READ(sub_to_main_comm_r)
+ AM_RANGE(0x03, 0x03) AM_MIRROR(0x78) AM_READ_PORT("WHEEL")
+ AM_RANGE(0x04, 0x04) AM_MIRROR(0x78) AM_READ_PORT("DSWA")
+ AM_RANGE(0x05, 0x05) AM_MIRROR(0x78) AM_READ_PORT("DSWB")
+ AM_RANGE(0x06, 0x06) AM_MIRROR(0x78) AM_READ_PORT("TILT")
+ AM_RANGE(0x01, 0x01) AM_MIRROR(0x60) AM_READ(pc3259_0_r)
+ AM_RANGE(0x09, 0x09) AM_MIRROR(0x60) AM_READ(pc3259_1_r)
+ AM_RANGE(0x11, 0x11) AM_MIRROR(0x60) AM_READ(pc3259_2_r)
+ AM_RANGE(0x19, 0x19) AM_MIRROR(0x60) AM_READ(pc3259_3_r)
+ AM_RANGE(0x00, 0x0f) AM_MIRROR(0x40) AM_WRITE(cpu0_outputs_w)
+ AM_RANGE(0x10, 0x13) AM_MIRROR(0x40) AM_WRITE(main_to_sub_comm_w)
+ AM_RANGE(0x20, 0x2f) AM_MIRROR(0x53) AM_WRITE(led_board_w)
+ADDRESS_MAP_END
+
+
+/* complete memory map derived from schematics */
+static ADDRESS_MAP_START( sub_map, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x1fff) AM_ROM
+ AM_RANGE(0x2000, 0x27ff) AM_READWRITE(MRA8_RAM, grchamp_left_w) AM_BASE_MEMBER(grchamp_state, leftram)
+ AM_RANGE(0x2800, 0x2fff) AM_READWRITE(MRA8_RAM, grchamp_right_w) AM_BASE_MEMBER(grchamp_state, rightram)
+ AM_RANGE(0x3000, 0x37ff) AM_READWRITE(MRA8_RAM, grchamp_center_w) AM_BASE_MEMBER(grchamp_state, centerram)
+ AM_RANGE(0x4000, 0x43ff) AM_MIRROR(0x0400) AM_RAM
+ AM_RANGE(0x5000, 0x6fff) AM_ROM
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( sub_portmap, ADDRESS_SPACE_IO, 8 )
+ ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
+ AM_RANGE(0x00, 0x03) AM_READ(main_to_sub_comm_r)
+ AM_RANGE(0x00, 0x0f) AM_MIRROR(0x70) AM_WRITE(cpu1_outputs_w)
+ADDRESS_MAP_END
+
+
+/* complete memory map derived from schematics */
+static ADDRESS_MAP_START( sound_map, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x1fff) AM_ROM
+ AM_RANGE(0x4000, 0x43ff) AM_RAM
+ AM_RANGE(0x4800, 0x4800) AM_MIRROR(0x07f8) AM_WRITE(AY8910_control_port_0_w)
+ AM_RANGE(0x4801, 0x4801) AM_MIRROR(0x07f8) AM_READWRITE(AY8910_read_port_0_r, AY8910_write_port_0_w)
+ AM_RANGE(0x4802, 0x4802) AM_MIRROR(0x07f8) AM_WRITE(AY8910_control_port_1_w)
+ AM_RANGE(0x4803, 0x4803) AM_MIRROR(0x07f8) AM_READWRITE(AY8910_read_port_1_r, AY8910_write_port_1_w)
+ AM_RANGE(0x4804, 0x4804) AM_MIRROR(0x07fa) AM_WRITE(AY8910_control_port_2_w)
+ AM_RANGE(0x4805, 0x4805) AM_MIRROR(0x07fa) AM_READWRITE(AY8910_read_port_2_r, AY8910_write_port_2_w)
+ AM_RANGE(0x5000, 0x5000) AM_READ(soundlatch_r)
+ADDRESS_MAP_END
+
+
+
+/*************************************
+ *
+ * Port definitions
+ *
+ *************************************/
+
+static INPUT_PORTS_START( grchamp )
+
+ PORT_START_TAG("TILT")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_SERVICE3 ) /* High Score reset switch */
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_TOGGLE /* High Gear */
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_TILT ) /* Tilt */
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_SERVICE1 ) /* Service */
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 ) /* Coin A */
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 ) /* Coin B */
+
+ PORT_START_TAG("ACCEL")
+ PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_SENSITIVITY(100) PORT_KEYDELTA(16) PORT_CODE_INC(KEYCODE_LCONTROL)
+ //mask,default,type,sensitivity,delta,min,max
+
+ PORT_START_TAG("WHEEL")
+ PORT_BIT( 0xff, 0x00, IPT_DIAL ) PORT_SENSITIVITY(25) PORT_KEYDELTA(5) PORT_REVERSE
+ //mask,default,type,sensitivity,delta,min,max
+
+ PORT_START_TAG("DSWA")
+ PORT_DIPNAME( 0x0f, 0x00, DEF_STR( Coin_A ) )
+ PORT_DIPSETTING( 0x0f, DEF_STR( 9C_1C ) )
+ PORT_DIPSETTING( 0x0e, DEF_STR( 8C_1C ) )
+ PORT_DIPSETTING( 0x0d, DEF_STR( 7C_1C ) )
+ PORT_DIPSETTING( 0x0c, DEF_STR( 6C_1C ) )
+ PORT_DIPSETTING( 0x0b, DEF_STR( 5C_1C ) )
+ PORT_DIPSETTING( 0x0a, DEF_STR( 4C_1C ) )
+ PORT_DIPSETTING( 0x09, DEF_STR( 3C_1C ) )
+ PORT_DIPSETTING( 0x08, 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_DIPSETTING( 0x03, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( 1C_5C ) )
+ PORT_DIPSETTING( 0x05, DEF_STR( 1C_6C ) )
+ PORT_DIPSETTING( 0x06, DEF_STR( 1C_7C ) )
+ PORT_DIPSETTING( 0x07, DEF_STR( 1C_8C ) )
+ PORT_DIPNAME( 0xf0, 0x00, DEF_STR( Coin_B ) )
+ PORT_DIPSETTING( 0xf0, DEF_STR( 9C_1C ) )
+ PORT_DIPSETTING( 0xe0, DEF_STR( 8C_1C ) )
+ PORT_DIPSETTING( 0xd0, DEF_STR( 7C_1C ) )
+ PORT_DIPSETTING( 0xc0, DEF_STR( 6C_1C ) )
+ PORT_DIPSETTING( 0xb0, DEF_STR( 5C_1C ) )
+ PORT_DIPSETTING( 0xa0, DEF_STR( 4C_1C ) )
+ PORT_DIPSETTING( 0x90, DEF_STR( 3C_1C ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x10, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( 1C_3C ) )
+ PORT_DIPSETTING( 0x30, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( 1C_5C ) )
+ PORT_DIPSETTING( 0x50, DEF_STR( 1C_6C ) )
+ PORT_DIPSETTING( 0x60, DEF_STR( 1C_7C ) )
+ PORT_DIPSETTING( 0x70, DEF_STR( 1C_8C ) )
+
+ PORT_START_TAG("DSWB")
+ PORT_DIPNAME( 0x03, 0x02, "Extra Race" )
+ PORT_DIPSETTING( 0x00, "4th" )
+ PORT_DIPSETTING( 0x02, "5th" )
+ PORT_DIPSETTING( 0x01, "6th" )
+ PORT_DIPSETTING( 0x03, "7th" )
+ PORT_DIPUNUSED( 0x04, IP_ACTIVE_HIGH )
+ PORT_DIPNAME( 0x08, 0x00, "RAM Test" )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x00, "Coin System" )
+ PORT_DIPSETTING( 0x10, "1 Way" )
+ PORT_DIPSETTING( 0x00, "2 Way" )
+ PORT_DIPNAME( 0x20, 0x00, "Display '1981'" )
+ PORT_DIPSETTING( 0x20, DEF_STR( No ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
+ PORT_DIPNAME( 0x40, 0x40, "Display Score" )
+ PORT_DIPSETTING( 0x00, "LEDs" )
+ PORT_DIPSETTING( 0x40, "On Screen" )
+ PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( On ) )
+INPUT_PORTS_END
+
+
+
+/*************************************
+ *
+ * Machine drivers
+ *
+ *************************************/
+
+static MACHINE_DRIVER_START( grchamp )
+ MDRV_DRIVER_DATA(grchamp_state)
+
+ /* basic machine hardware */
+ /* CPU BOARD */
+ MDRV_CPU_ADD(Z80, PIXEL_CLOCK/2)
+ MDRV_CPU_PROGRAM_MAP(main_map,0)
+ MDRV_CPU_IO_MAP(main_portmap,0)
+ MDRV_CPU_VBLANK_INT(grchamp_cpu0_interrupt,1)
+
+ /* GAME BOARD */
+ MDRV_CPU_ADD(Z80, PIXEL_CLOCK/2)
+ MDRV_CPU_PROGRAM_MAP(sub_map,0)
+ MDRV_CPU_IO_MAP(sub_portmap,0)
+ MDRV_CPU_VBLANK_INT(grchamp_cpu1_interrupt,1)
+
+ /* SOUND BOARD */
+ MDRV_CPU_ADD(Z80, SOUND_CLOCK/2)
+ MDRV_CPU_PROGRAM_MAP(sound_map,0)
+ MDRV_CPU_PERIODIC_INT(irq0_line_hold, (double)SOUND_CLOCK/4/16/16/10/16)
+
+ MDRV_MACHINE_START(grchamp)
+ MDRV_WATCHDOG_VBLANK_INIT(8)
+ MDRV_INTERLEAVE(100)
+
+ /* video hardware */
+ MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER | VIDEO_ALWAYS_UPDATE)
+ MDRV_GFXDECODE(grchamp)
+
+ MDRV_SCREEN_ADD("main", 0)
+ MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
+ MDRV_SCREEN_RAW_PARAMS(PIXEL_CLOCK, HTOTAL, HBEND, HBSTART, VTOTAL, VBEND, VBSTART)
+
+ MDRV_PALETTE_INIT(grchamp)
+ MDRV_VIDEO_START(grchamp)
+ MDRV_VIDEO_UPDATE(grchamp)
+
+ /* sound hardware */
+ MDRV_SPEAKER_STANDARD_MONO("mono")
+
+ MDRV_SOUND_ADD(AY8910, SOUND_CLOCK/4) /* 3B */
+ MDRV_SOUND_CONFIG(ay8910_interface_1)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.2)
+
+ MDRV_SOUND_ADD(AY8910, SOUND_CLOCK/4)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.2)
+
+ MDRV_SOUND_ADD(AY8910, SOUND_CLOCK/4) /* 1B */
+ MDRV_SOUND_CONFIG(ay8910_interface_3)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.2)
+
+ MDRV_SOUND_ADD(DISCRETE, 0)
+ MDRV_SOUND_CONFIG_DISCRETE(grchamp)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+MACHINE_DRIVER_END
+
+
+
+/*************************************
+ *
+ * ROM definitions
+ *
+ *************************************/
+
+ROM_START( grchamp )
+ ROM_REGION( 0x4000, REGION_CPU1, 0 )
+ ROM_LOAD( "gm03", 0x0000, 0x1000, CRC(47fda76e) SHA1(fd5f1a651481669d64e5e0799369c22472265535) )
+ ROM_LOAD( "gm04", 0x1000, 0x1000, CRC(07a623dc) SHA1(bb8a6531d95e996148c06fd336db4054eb1d28dd) )
+ ROM_LOAD( "gm05", 0x2000, 0x1000, CRC(716e1fba) SHA1(fe596873c932513227b982cd23af440d31612de9) )
+ ROM_LOAD( "gm06", 0x3000, 0x1000, CRC(157db30b) SHA1(a74314d3aef4659ea96ed659e5db2883e7ae1cb1) )
+
+ ROM_REGION( 0x8000, REGION_CPU2, 0 )
+ ROM_LOAD( "gm09", 0x0000, 0x1000, CRC(d57bd109) SHA1(d1cb5ba783eaceda45893f6404fe9dbac740a2de) )
+ ROM_LOAD( "gm10", 0x1000, 0x1000, CRC(41ba07f1) SHA1(103eeacdd36b4347fc62debb6b5f4163083313f4) )
+ ROM_LOAD( "gr16", 0x5000, 0x1000, CRC(885d708e) SHA1(d5d2978a0eeca167ec1fb9f6f981388de46fbf81) )
+ ROM_LOAD( "gr15", 0x6000, 0x1000, CRC(a822430b) SHA1(4d29612489362d2dc3f3a9eab609902a50c34aff) )
+
+ ROM_REGION( 0x10000, REGION_CPU3, 0 )
+ ROM_LOAD( "gm07", 0x0000, 0x1000, CRC(65dcc572) SHA1(c9b19af365fa7ade2698be0bb892591ba281ecb0) )
+ ROM_LOAD( "gm08", 0x1000, 0x1000, CRC(224d880c) SHA1(68aaaa0213d09cf34ba50c91d8c031d041f8a76f) )
+
+ ROM_REGION( 0x2000, REGION_GFX1, ROMREGION_DISPOSE ) /* characters/sprites */
+ ROM_LOAD( "gm01", 0x0000, 0x1000, CRC(846f8e89) SHA1(346bfd69268606fde27643b4d135b481536b73b1) )
+ ROM_LOAD( "gm02", 0x1000, 0x1000, CRC(5911948d) SHA1(6f3a9a7f8d6a04b8e6d83756764c9c4185983d9b) )
+
+ ROM_REGION( 0x2000, REGION_GFX2, ROMREGION_DISPOSE ) /* left tiles */
+ ROM_LOAD( "gr20", 0x0000, 0x1000, CRC(88ba2c03) SHA1(4dfd136f122663223043c6cd79566f8eeec72681) )
+ ROM_LOAD( "gr19", 0x1000, 0x1000, CRC(ff34b444) SHA1(51c67a1691da3a2d8ddcff5fd8fa816b1f9c60c0) )
+
+ ROM_REGION( 0x2000, REGION_GFX3, ROMREGION_DISPOSE ) /* right tiles */
+ ROM_LOAD( "gr21", 0x0000, 0x1000, CRC(2f77a9f3) SHA1(9e20a776c5e8c7577c3e8467d4f8ac7ac909901f) )
+ ROM_LOAD( "gr22", 0x1000, 0x1000, CRC(31bb5fc7) SHA1(9f638e632e7c72461bedecb710ac9b30f015eebf) )
+
+ ROM_REGION( 0x2000, REGION_GFX4, ROMREGION_DISPOSE ) /* center tiles */
+ ROM_LOAD( "gr13", 0x0000, 0x1000, CRC(d5e19ebd) SHA1(d0ca553eec87619ec489f7ba6238f1fdde7c480b) )
+ ROM_LOAD( "gr14", 0x1000, 0x1000, CRC(d129b8e4) SHA1(db25bfde2a48e14d38a43133d88d479c3cc1397a) )
+
+ ROM_REGION( 0x0800, REGION_GFX5, 0 ) /* rain */
+ ROM_LOAD( "gr10", 0x0000, 0x0800, CRC(b1f0a873) SHA1(f7ef1a16556ae3e7d70209bcb38ea3ae94208789) )
+
+ ROM_REGION( 0x0800, REGION_GFX6, 0 ) /* headlights */
+ ROM_LOAD( "gr12", 0x0000, 0x0800, CRC(f3bc599e) SHA1(3ec19584896a0bf10b9c5750f3c78ad3e722cc49) )
+
+ ROM_REGION( 0x1000, REGION_GFX7, 0 ) /* player */
+ ROM_LOAD( "gr11", 0x0000, 0x1000, CRC(54eb3ec9) SHA1(22739240f53c708d8e53094d96916778e12beeed) )
+
+ ROM_REGION( 0x0040, REGION_PROMS, 0 )
+ ROM_LOAD( "gr23.bpr", 0x00, 0x20, CRC(41c6c48d) SHA1(8bd14b5f02f9da0a68e3125955be18462b57401d) ) /* background colors */
+ ROM_LOAD( "gr09.bpr", 0x20, 0x20, CRC(260fb2b9) SHA1(db0bf49f12a944613d113317d7dfea25bd7469fc) ) /* sprite/text colors */
+ROM_END
+
+
+
+/*************************************
+ *
+ * Game drivers
+ *
+ *************************************/
+
+GAME( 1981, grchamp, 0, grchamp, grchamp, 0, ROT270, "Taito", "Grand Champion", GAME_IMPERFECT_SOUND | GAME_IMPERFECT_GRAPHICS )