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Diffstat (limited to 'src/mame/drivers/changela.c')
-rw-r--r--src/mame/drivers/changela.c572
1 files changed, 572 insertions, 0 deletions
diff --git a/src/mame/drivers/changela.c b/src/mame/drivers/changela.c
new file mode 100644
index 00000000000..23ad19926a2
--- /dev/null
+++ b/src/mame/drivers/changela.c
@@ -0,0 +1,572 @@
+/**************************************************************************
+Change Lanes
+(C) Taito 1983
+
+Jarek Burczynski
+Phil Stroffolino
+Tomasz Slanina
+
+***************************************************************************/
+
+#include "driver.h"
+#include "cpu/z80/z80.h"
+#include "cpu/m6805/m6805.h"
+#include "sound/ay8910.h"
+
+
+VIDEO_START( changela );
+VIDEO_UPDATE( changela );
+
+WRITE8_HANDLER( changela_colors_w );
+WRITE8_HANDLER( changela_mem_device_select_w );
+WRITE8_HANDLER( changela_mem_device_w );
+READ8_HANDLER( changela_mem_device_r );
+WRITE8_HANDLER( changela_slope_rom_addr_hi_w );
+WRITE8_HANDLER( changela_slope_rom_addr_lo_w );
+
+
+static UINT8 portA_in,portA_out,ddrA;
+static UINT8 portB_out,ddrB;
+static UINT8 portC_in,portC_out,ddrC;
+
+static UINT8 mcu_out;
+static UINT8 mcu_in;
+static UINT8 mcu_PC1;
+static UINT8 mcu_PC0;
+
+UINT8 changela_tree0_col;
+UINT8 changela_tree1_col;
+UINT8 changela_left_bank_col;
+UINT8 changela_right_bank_col;
+UINT8 changela_boat_shore_col;
+UINT8 changela_collision_reset;
+UINT8 changela_tree_collision_reset;
+
+static MACHINE_RESET (changela)
+{
+ mcu_PC1=0;
+ mcu_PC0=0;
+
+ changela_tree0_col = 0;
+ changela_tree1_col = 0;
+ changela_left_bank_col = 0;
+ changela_right_bank_col = 0;
+ changela_boat_shore_col = 0;
+ changela_collision_reset = 0;
+ changela_tree_collision_reset = 0;
+}
+
+static READ8_HANDLER( mcu_r )
+{
+ //mame_printf_debug("Z80 MCU R = %x\n",mcu_out);
+ return mcu_out;
+}
+
+/* latch LS374 at U39 */
+static WRITE8_HANDLER( mcu_w )
+{
+ mcu_in = data;
+}
+
+
+
+/*********************************
+ MCU
+*********************************/
+
+
+
+static READ8_HANDLER( changela_68705_portA_r )
+{
+ return (portA_out & ddrA) | (portA_in & ~ddrA);
+}
+
+static WRITE8_HANDLER( changela_68705_portA_w )
+{
+ portA_out = data;
+}
+
+static WRITE8_HANDLER( changela_68705_ddrA_w )
+{
+ ddrA = data;
+}
+
+
+static READ8_HANDLER( changela_68705_portB_r )
+{
+ return (portB_out & ddrB) | (readinputport(4) & ~ddrB);
+}
+
+static WRITE8_HANDLER( changela_68705_portB_w )
+{
+ portB_out = data;
+}
+
+static WRITE8_HANDLER( changela_68705_ddrB_w )
+{
+ ddrB = data;
+}
+
+
+static READ8_HANDLER( changela_68705_portC_r )
+{
+ return (portC_out & ddrC) | (portC_in & ~ddrC);
+}
+
+static WRITE8_HANDLER( changela_68705_portC_w )
+{
+ /* PC3 is connected to the CLOCK input of the LS374,
+ so we latch the data on positive going edge of the clock */
+
+/* this is strange because if we do this corectly - it just doesn't work */
+ if( (data&8) /*& (!(portC_out&8))*/ )
+ mcu_out = portA_out;
+
+
+ /* PC2 is connected to the /OE input of the LS374 */
+
+ if(!(data&4))
+ portA_in = mcu_in;
+
+ portC_out = data;
+}
+
+static WRITE8_HANDLER( changela_68705_ddrC_w )
+{
+ ddrC = data;
+}
+
+
+static ADDRESS_MAP_START( mcu_readmem, ADDRESS_SPACE_PROGRAM, 8 )
+ ADDRESS_MAP_FLAGS( AMEF_ABITS(11) )
+ AM_RANGE(0x0000, 0x0000) AM_READ(changela_68705_portA_r)
+ AM_RANGE(0x0001, 0x0001) AM_READ(changela_68705_portB_r)
+ AM_RANGE(0x0002, 0x0002) AM_READ(changela_68705_portC_r)
+
+ AM_RANGE(0x0000, 0x007f) AM_READ(MRA8_RAM)
+ AM_RANGE(0x0080, 0x07ff) AM_READ(MRA8_ROM)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( mcu_writemem, ADDRESS_SPACE_PROGRAM, 8 )
+ ADDRESS_MAP_FLAGS( AMEF_ABITS(11) )
+ AM_RANGE(0x0000, 0x0000) AM_WRITE(changela_68705_portA_w)
+ AM_RANGE(0x0001, 0x0001) AM_WRITE(changela_68705_portB_w)
+ AM_RANGE(0x0002, 0x0002) AM_WRITE(changela_68705_portC_w)
+ AM_RANGE(0x0004, 0x0004) AM_WRITE(changela_68705_ddrA_w)
+ AM_RANGE(0x0005, 0x0005) AM_WRITE(changela_68705_ddrB_w)
+ AM_RANGE(0x0006, 0x0006) AM_WRITE(changela_68705_ddrC_w)
+
+ AM_RANGE(0x0000, 0x007f) AM_WRITE(MWA8_RAM)
+ AM_RANGE(0x0080, 0x07ff) AM_WRITE(MWA8_ROM)
+ADDRESS_MAP_END
+
+
+
+/* U30 */
+static READ8_HANDLER( changela_24_r )
+{
+ return ((portC_out&2)<<2) | 7; /* bits 2,1,0-N/C inputs */
+}
+
+static READ8_HANDLER( changela_25_r )
+{
+ //collisions on bits 3,2, bits 1,0-N/C inputs
+ return (changela_tree1_col << 3) | (changela_tree0_col << 2) | 0x03;
+}
+
+static READ8_HANDLER( changela_30_r )
+{
+ return readinputport(7) & 0x0f; //wheel control (clocked input) signal on bits 3,2,1,0
+}
+
+static READ8_HANDLER( changela_31_r )
+{
+ /* If the new value is less than the old value, and it did not wrap around,
+ or if the new value is greater than the old value, and it did wrap around,
+ then we are moving LEFT. */
+ static UINT8 prev_value = 0;
+ UINT8 curr_value = readinputport(7);
+ static int dir = 0;
+
+ if( (curr_value < prev_value && (prev_value - curr_value) < 0x80)
+ || (curr_value > prev_value && (curr_value - prev_value) > 0x80) )
+ dir = 1;
+ if( (prev_value < curr_value && (curr_value - prev_value) < 0x80)
+ || (prev_value > curr_value && (prev_value - curr_value) > 0x80) )
+ dir = 0;
+
+ prev_value = curr_value;
+
+ //wheel UP/DOWN control signal on bit 3, collisions on bits:2,1,0
+ return (dir << 3) | (changela_left_bank_col << 2) | (changela_right_bank_col << 1) | changela_boat_shore_col;
+}
+
+static READ8_HANDLER( changela_2c_r )
+{
+ int val = readinputport(5);
+
+ val = (val&0x30) | ((val&1)<<7) | (((val&1)^1)<<6);
+
+ return val;
+}
+
+static READ8_HANDLER( changela_2d_r )
+{
+ /* the schems are unreadable - i'm not sure it is V8 (page 74, SOUND I/O BOARD SCHEMATIC 1 OF 2, FIGURE 24 - in the middle on the right side) */
+ int v8 = 0;
+ int gas;
+
+ if ((video_screen_get_vpos(0) & 0xf8)==0xf8)
+ v8 = 1;
+
+ /* Gas pedal is made up of 2 switches, 1 active low, 1 active high */
+ switch(readinputport(6) & 0x03)
+ {
+ case 0x02:
+ gas = 0x80;
+ break;
+ case 0x01:
+ gas = 0x00;
+ break;
+ default:
+ gas = 0x40;
+ break;
+ }
+
+ return (readinputport(6) & 0x20) | gas | (v8<<4);
+}
+
+static WRITE8_HANDLER( mcu_PC0_w )
+{
+ portC_in = (portC_in&0xfe) | (data&1);
+}
+
+static WRITE8_HANDLER( changela_collision_reset_0 )
+{
+ changela_collision_reset = data & 0x01;
+}
+
+static WRITE8_HANDLER( changela_collision_reset_1 )
+{
+ changela_tree_collision_reset = data & 0x01;
+}
+
+static WRITE8_HANDLER( changela_coin_counter_w )
+{
+ coin_counter_w(offset,data);
+}
+
+
+static ADDRESS_MAP_START( readmem, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x7fff) AM_READ(MRA8_ROM)
+ AM_RANGE(0x8000, 0x83ff) AM_READ(MRA8_RAM) /* OBJ0 RAM */
+ AM_RANGE(0x9000, 0x97ff) AM_READ(MRA8_RAM) /* OBJ1 RAM */
+ AM_RANGE(0xb000, 0xbfff) AM_READ(MRA8_ROM)
+
+ AM_RANGE(0xc000, 0xc7ff) AM_READ(changela_mem_device_r) /* RAM4 (River Bed RAM); RAM5 (Tree RAM) */
+
+ AM_RANGE(0xd000, 0xd000) AM_READ(AY8910_read_port_0_r)
+ AM_RANGE(0xd010, 0xd010) AM_READ(AY8910_read_port_1_r)
+
+ /* LS139 - U24 */
+ AM_RANGE(0xd024, 0xd024) AM_READ(changela_24_r)
+ AM_RANGE(0xd025, 0xd025) AM_READ(changela_25_r)
+ AM_RANGE(0xd028, 0xd028) AM_READ(mcu_r)
+ AM_RANGE(0xd02c, 0xd02c) AM_READ(changela_2c_r)
+ AM_RANGE(0xd02d, 0xd02d) AM_READ(changela_2d_r)
+
+ AM_RANGE(0xd030, 0xd030) AM_READ(changela_30_r)
+ AM_RANGE(0xd031, 0xd031) AM_READ(changela_31_r)
+
+ AM_RANGE(0xf000, 0xf7ff) AM_READ(MRA8_RAM) /* RAM2 (Processor RAM) */
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( writemem, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x7fff) AM_WRITE(MWA8_ROM) /* Processor ROM */
+ AM_RANGE(0x8000, 0x83ff) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) /* OBJ0 RAM (A10 = GND )*/
+ AM_RANGE(0x9000, 0x97ff) AM_WRITE(MWA8_RAM) AM_BASE(&videoram) /* OBJ1 RAM */
+ AM_RANGE(0xa000, 0xa07f) AM_WRITE(changela_colors_w) AM_BASE(&colorram) /* Color 93419 RAM 64x9(nine!!!) bits A0-used as the 8-th bit data input (d0-d7->normal, a0->d8) */
+ AM_RANGE(0xb000, 0xbfff) AM_WRITE(MWA8_ROM) /* Processor ROM */
+
+ AM_RANGE(0xc000, 0xc7ff) AM_WRITE(changela_mem_device_w) /* River-Tree RAMs, slope ROM, tree ROM */
+
+ /* LS138 - U16 */
+ AM_RANGE(0xc800, 0xc800) AM_WRITE(MWA8_NOP) /* not connected */
+ AM_RANGE(0xc900, 0xc900) AM_WRITE(changela_mem_device_select_w) /* selects the memory device to be accessible at 0xc000-0xc7ff */
+ AM_RANGE(0xca00, 0xca00) AM_WRITE(changela_slope_rom_addr_hi_w)
+ AM_RANGE(0xcb00, 0xcb00) AM_WRITE(changela_slope_rom_addr_lo_w)
+
+ AM_RANGE(0xd000, 0xd000) AM_WRITE(AY8910_control_port_0_w)
+ AM_RANGE(0xd001, 0xd001) AM_WRITE(AY8910_write_port_0_w)
+ AM_RANGE(0xd010, 0xd010) AM_WRITE(AY8910_control_port_1_w)
+ AM_RANGE(0xd011, 0xd011) AM_WRITE(AY8910_write_port_1_w)
+
+ /* LS259 - U44 */
+ AM_RANGE(0xd020, 0xd020) AM_WRITE(changela_collision_reset_0)
+ AM_RANGE(0xd021, 0xd022) AM_WRITE(changela_coin_counter_w)
+//AM_RANGE(0xd023, 0xd023) AM_WRITE(MWA8_NOP)
+ AM_RANGE(0xd024, 0xd024) AM_WRITE(mcu_PC0_w)
+ AM_RANGE(0xd025, 0xd025) AM_WRITE(changela_collision_reset_1)
+ AM_RANGE(0xd026, 0xd026) AM_WRITE(MWA8_NOP)
+
+ AM_RANGE(0xd030, 0xd030) AM_WRITE(mcu_w)
+ AM_RANGE(0xe000, 0xe000) AM_WRITE(watchdog_reset_w) /* Watchdog */
+ AM_RANGE(0xf000, 0xf7ff) AM_WRITE(MWA8_RAM) /* Processor RAM */
+ADDRESS_MAP_END
+
+
+static INPUT_PORTS_START( changela )
+ PORT_START /* 0 */ /* DSWA */
+ PORT_DIPNAME( 0x07, 0x01, "Steering Wheel Ratio" )
+ PORT_DIPSETTING( 0x01, "Recommended" )
+ PORT_DIPNAME( 0x08, 0x00, DEF_STR( Demo_Sounds ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x00, "Ignore Memory Failures" )
+ PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x20, 0x00, DEF_STR( Controls ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Joystick ) )
+ PORT_DIPSETTING( 0x00, "Steering Wheel" )
+ PORT_DIPNAME( 0x40, 0x40, "Diagnostic" )
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x00, DEF_STR( Players ) )
+ PORT_DIPSETTING( 0x80, "1" )
+ PORT_DIPSETTING( 0x00, "2" )
+
+ PORT_START /* 1 */ /* DSWB */
+ PORT_DIPNAME( 0x03, 0x00, "Max Bonus Fuels" )
+ PORT_DIPSETTING( 0x01, "1" )
+ PORT_DIPSETTING( 0x02, "2" )
+ PORT_DIPSETTING( 0x03, "3" )
+ PORT_DIPSETTING( 0x00, "99" )
+ PORT_DIPNAME( 0x0c, 0x08, "Game Difficulty" )
+ PORT_DIPSETTING( 0x00, DEF_STR( Very_Easy) )
+ PORT_DIPSETTING( 0x04, DEF_STR( Easy ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Medium ) )
+ PORT_DIPSETTING( 0x0c, DEF_STR( Hard ) )
+ PORT_DIPNAME( 0x30, 0x20, "Traffic Difficulty" )
+ PORT_DIPSETTING( 0x00, DEF_STR( Very_Easy) )
+ PORT_DIPSETTING( 0x10, DEF_STR( Easy ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Medium ) )
+ PORT_DIPSETTING( 0x30, DEF_STR( Hard ) )
+ PORT_DIPNAME( 0x40, 0x00, "Land Collisions Enabled" )
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x00, "Car Collisions Enabled" )
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+
+ PORT_START /* 2 */ /* DSWC - coinage */
+ PORT_DIPNAME( 0xf0, 0x10, DEF_STR( Coin_A ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) )
+ PORT_DIPSETTING( 0x90, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0xa0, DEF_STR( 2C_2C ) )
+ PORT_DIPSETTING( 0x10, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0xb0, DEF_STR( 2C_3C ) )
+ PORT_DIPSETTING( 0xc0, DEF_STR( 2C_4C ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0xd0, DEF_STR( 2C_5C ) )
+ PORT_DIPSETTING( 0xe0, DEF_STR( 2C_6C ) )
+ PORT_DIPSETTING( 0x30, DEF_STR( 1C_3C ) )
+ PORT_DIPSETTING( 0xf0, DEF_STR( 2C_7C ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x50, DEF_STR( 1C_5C ) )
+ PORT_DIPSETTING( 0x60, DEF_STR( 1C_6C ) )
+ PORT_DIPSETTING( 0x70, DEF_STR( 1C_7C ) )
+ PORT_DIPNAME( 0x0f, 0x01, DEF_STR( Coin_B ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) )
+ PORT_DIPSETTING( 0x09, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x0a, DEF_STR( 2C_2C ) )
+ PORT_DIPSETTING( 0x01, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x0b, DEF_STR( 2C_3C ) )
+ PORT_DIPSETTING( 0x0c, DEF_STR( 2C_4C ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0x0d, DEF_STR( 2C_5C ) )
+ PORT_DIPSETTING( 0x0e, DEF_STR( 2C_6C ) )
+ PORT_DIPSETTING( 0x03, DEF_STR( 1C_3C ) )
+ PORT_DIPSETTING( 0x0f, DEF_STR( 2C_7C ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x05, DEF_STR( 1C_5C ) )
+ PORT_DIPSETTING( 0x06, DEF_STR( 1C_6C ) )
+ PORT_DIPSETTING( 0x07, DEF_STR( 1C_7C ) )
+
+ PORT_START /* 3 */ /* DSWD - bonus */
+ PORT_DIPNAME( 0x01, 0x01, "Right Coin Counter" )
+ PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x02, 0x02, "Left Coin Counter" )
+ PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x1c, 0x00, "Credits for Bonus" )
+ PORT_DIPSETTING( 0x00, "0" )
+ PORT_DIPSETTING( 0x04, "1" )
+ PORT_DIPSETTING( 0x08, "2" )
+ PORT_DIPSETTING( 0x0c, "3" )
+ PORT_DIPSETTING( 0x10, "4" )
+ PORT_DIPSETTING( 0x14, "5" )
+ PORT_DIPSETTING( 0x18, "6" )
+ PORT_DIPSETTING( 0x1c, "7" )
+ PORT_DIPUNUSED( 0x20, IP_ACTIVE_LOW )
+ PORT_DIPNAME( 0xc0, 0x00, "King of the World" )
+ PORT_DIPSETTING( 0x80, "No Name" )
+ PORT_DIPSETTING( 0x40, "Short Name" )
+ PORT_DIPSETTING( 0x00, "Long Name" )
+
+ PORT_START /* port 4 */ /* MCU */
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
+ PORT_SERVICE( 0x04, IP_ACTIVE_LOW )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_DIPNAME( 0x10, 0x00, DEF_STR(Free_Play) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x10, DEF_STR( On ) )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN3 ) /* NC */
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )
+
+ PORT_START /* 5 */ /* 0xDx2C */
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("Gear Shift") PORT_CODE(KEYCODE_SPACE) PORT_TOGGLE /* Gear shift */
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN ) /* FWD - negated bit 7 */
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN ) /* REV - gear position */
+
+ PORT_START /* 6 */ /* 0xDx2D */
+ PORT_BIT( 0x03, 0x00, IPT_PEDAL ) PORT_MINMAX(0x00, 0x02) PORT_SENSITIVITY(10) PORT_KEYDELTA(1) //gas pedal
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_TILT )
+ //PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) //gas1
+ //PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON2 ) //gas2
+
+ PORT_START /* 7 */ /* 0xDx30 DRIVING_WHEEL */
+ PORT_BIT( 0xff, 0x00, IPT_DIAL ) PORT_MINMAX(0x00, 0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(8)
+
+
+INPUT_PORTS_END
+
+
+static struct AY8910interface ay8910_interface_1 = {
+ input_port_0_r,
+ input_port_1_r
+};
+
+static struct AY8910interface ay8910_interface_2 = {
+ input_port_2_r,
+ input_port_3_r
+};
+
+
+static INTERRUPT_GEN( chl_interrupt )
+{
+ int vector = video_screen_get_vblank(0) ? 0xdf : 0xcf; /* 4 irqs per frame: 3 times 0xcf, 1 time 0xdf */
+
+// video_screen_update_partial(0, video_screen_get_vpos(0));
+
+ cpunum_set_input_line_and_vector(0, 0, HOLD_LINE, vector);
+
+ /* it seems the V8 == Vblank and it is connected to the INT on the 68705 */
+ //so we should cause an INT on the cpu 1 here, as well.
+ //but only once per frame !
+ if (vector == 0xdf) /* only on vblank */
+ cpunum_set_input_line(1, 0, PULSE_LINE );
+
+}
+
+static MACHINE_DRIVER_START( changela )
+
+ MDRV_CPU_ADD(Z80,5000000)
+ MDRV_CPU_PROGRAM_MAP(readmem,writemem)
+ MDRV_CPU_VBLANK_INT(chl_interrupt,4)
+
+ MDRV_CPU_ADD(M68705,2500000/M68705_CLOCK_DIVIDER)
+ MDRV_CPU_PROGRAM_MAP(mcu_readmem,mcu_writemem)
+
+ MDRV_SCREEN_REFRESH_RATE(60)
+
+ MDRV_MACHINE_RESET(changela)
+
+ MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
+ MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
+ MDRV_SCREEN_SIZE(32*8, 262) /* vert size is a guess */
+ MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 4*8, 32*8-1)
+ MDRV_PALETTE_LENGTH(0x40)
+
+ MDRV_VIDEO_START(changela)
+ MDRV_VIDEO_UPDATE(changela)
+
+ MDRV_SPEAKER_STANDARD_MONO("mono")
+
+ MDRV_SOUND_ADD(AY8910, 1250000)
+ MDRV_SOUND_CONFIG(ay8910_interface_1)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+
+ MDRV_SOUND_ADD(AY8910, 1250000)
+ MDRV_SOUND_CONFIG(ay8910_interface_2)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+MACHINE_DRIVER_END
+
+
+ROM_START( changela )
+ ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* Z80 code */
+ ROM_LOAD( "cl25a", 0x0000, 0x2000, CRC(38530a60) SHA1(0b0ef1abe11c5271fcd1671322b77165217553c3) )
+ ROM_LOAD( "cl24a", 0x2000, 0x2000, CRC(2fcf4a82) SHA1(c33355e2d4d3fab32c8d713a680ec0fceedab341) )
+ ROM_LOAD( "cl23", 0x4000, 0x2000, CRC(08385891) SHA1(d8d66664ec25db067d5a4a6c35ec0ac65b9e0c6a) )
+ ROM_LOAD( "cl22", 0x6000, 0x2000, CRC(796e0abd) SHA1(64dd9fc1f9bc44519a253ef0c02e181dd13904bf) )
+ ROM_LOAD( "cl27", 0xb000, 0x1000, CRC(3668afb8) SHA1(bcfb788baf806edcb129ea9f9dcb1d4260684773) )
+
+ ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* 68705U3 */
+ ROM_LOAD( "cl38a", 0x0000, 0x800, CRC(b70156ce) SHA1(c5eab8bbd65c4f587426298da4e22f991ce01dde) )
+
+ ROM_REGION( 0x4000, REGION_GFX1, 0 ) /* tile data */
+ ROM_LOAD( "cl111", 0x0000, 0x2000, CRC(41c0149d) SHA1(3ea53a3821b044b3d0451fec1b4ee2c28da393ca) )
+ ROM_LOAD( "cl113", 0x2000, 0x2000, CRC(ddf99926) SHA1(e816b88302c5639c7284f4845d450f232d63a10c) )
+
+ ROM_REGION( 0x1000, REGION_GFX2, 0 ) /* obj 1 data */
+ ROM_LOAD( "cl46", 0x0000, 0x1000, CRC(9c0a7d28) SHA1(fac9180ea0d9aeea56a84b35cc0958f0dd86a801) )
+
+ ROM_REGION( 0x8000, REGION_USER1, 0 ) /* obj 0 data */
+ ROM_LOAD( "cl100", 0x0000, 0x2000, CRC(3fa9e4fa) SHA1(9abd7df5fcf143a0c476bd8c8753c5ea294b9f74) )
+ ROM_LOAD( "cl99", 0x2000, 0x2000, CRC(67b27b9e) SHA1(7df0f93851959359218c8d2272e30d242a77039d) )
+ ROM_LOAD( "cl98", 0x4000, 0x2000, CRC(bffe4149) SHA1(5cf0b98f9d342bd06d575c565ea01bbd79f5e04b) )
+ ROM_LOAD( "cl97", 0x6000, 0x2000, CRC(5abab8f9) SHA1(f5156855bbcdf0740fd44520386318ee53ebbf9a) )
+
+ ROM_REGION( 0x1000, REGION_USER2, 0 ) /* math tables: SLOPE ROM (river-tree schematic page 1/3) */
+ ROM_LOAD( "cl44", 0x0000, 0x1000, CRC(160d2bc7) SHA1(2609208c2bd4618ea340923ee01af69278980c36) ) /* first and 2nd half identical */
+
+ ROM_REGION( 0x3000, REGION_USER3, 0 ) /* math tables: TREE ROM (river-tree schematic page 3/3)*/
+ ROM_LOAD( "cl7", 0x0000, 0x0800, CRC(01e3efca) SHA1(b26203787f105ba32773e37035c39253050f9c82) ) /* fixed bits: 0xxxxxxx */
+ ROM_LOAD( "cl9", 0x1000, 0x2000, CRC(4e53cdd0) SHA1(6255411cfdccbe2c581c83f9127d582623453c3a) )
+
+ ROM_REGION( 0x0020, REGION_PROMS, 0 )
+ ROM_LOAD( "cl88", 0x0000, 0x0020, CRC(da4d6625) SHA1(2d9a268973518252eb36f479ab650af8c16c885c) ) /* math train state machine */
+ROM_END
+
+static DRIVER_INIT(changela)
+{
+ state_save_register_global(portA_in);
+ state_save_register_global(portA_out);
+ state_save_register_global(ddrA);
+ state_save_register_global(portB_out);
+ state_save_register_global(ddrB);
+ state_save_register_global(portC_in);
+ state_save_register_global(portC_out);
+ state_save_register_global(ddrC);
+
+ state_save_register_global(mcu_out);
+ state_save_register_global(mcu_in);
+ state_save_register_global(mcu_PC1);
+ state_save_register_global(mcu_PC0);
+
+ state_save_register_global(changela_tree0_col);
+ state_save_register_global(changela_tree1_col);
+ state_save_register_global(changela_left_bank_col);
+ state_save_register_global(changela_right_bank_col);
+ state_save_register_global(changela_boat_shore_col);
+ state_save_register_global(changela_collision_reset);
+ state_save_register_global(changela_tree_collision_reset);
+}
+
+GAME( 1983, changela, 0, changela, changela, changela, ROT180, "Taito Corporation", "Change Lanes", GAME_SUPPORTS_SAVE )