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-rw-r--r--src/mame/drivers/changela.cpp546
1 files changed, 546 insertions, 0 deletions
diff --git a/src/mame/drivers/changela.cpp b/src/mame/drivers/changela.cpp
new file mode 100644
index 00000000000..4c9cb8909ca
--- /dev/null
+++ b/src/mame/drivers/changela.cpp
@@ -0,0 +1,546 @@
+// license:???
+// copyright-holders:Jarek Burczynski, Phil Stroffolino, Tomasz Slanina
+/**************************************************************************
+Change Lanes
+(C) Taito 1983
+
+Jarek Burczynski
+Phil Stroffolino
+Tomasz Slanina
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "cpu/m6805/m6805.h"
+#include "sound/ay8910.h"
+#include "includes/changela.h"
+
+#include "changela.lh"
+
+
+READ8_MEMBER(changela_state::mcu_r)
+{
+ //osd_printf_debug("Z80 MCU R = %x\n", m_mcu_out);
+ return m_mcu_out;
+}
+
+/* latch LS374 at U39 */
+WRITE8_MEMBER(changela_state::mcu_w)
+{
+ m_mcu_in = data;
+}
+
+
+/*********************************
+ MCU
+*********************************/
+
+READ8_MEMBER(changela_state::changela_68705_port_a_r)
+{
+ return (m_port_a_out & m_ddr_a) | (m_port_a_in & ~m_ddr_a);
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_port_a_w)
+{
+ m_port_a_out = data;
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_ddr_a_w)
+{
+ m_ddr_a = data;
+}
+
+READ8_MEMBER(changela_state::changela_68705_port_b_r)
+{
+ return (m_port_b_out & m_ddr_b) | (ioport("MCU")->read() & ~m_ddr_b);
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_port_b_w)
+{
+ m_port_b_out = data;
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_ddr_b_w)
+{
+ m_ddr_b = data;
+}
+
+READ8_MEMBER(changela_state::changela_68705_port_c_r)
+{
+ return (m_port_c_out & m_ddr_c) | (m_port_c_in & ~m_ddr_c);
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_port_c_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) /*& (!(m_port_c_out & 8))*/ )
+ m_mcu_out = m_port_a_out;
+
+ /* PC2 is connected to the /OE input of the LS374 */
+ if (!(data & 4))
+ m_port_a_in = m_mcu_in;
+
+ m_port_c_out = data;
+}
+
+WRITE8_MEMBER(changela_state::changela_68705_ddr_c_w)
+{
+ m_ddr_c = data;
+}
+
+
+static ADDRESS_MAP_START( mcu_map, AS_PROGRAM, 8, changela_state )
+ ADDRESS_MAP_GLOBAL_MASK(0x7ff)
+ AM_RANGE(0x0000, 0x0000) AM_READWRITE(changela_68705_port_a_r, changela_68705_port_a_w)
+ AM_RANGE(0x0001, 0x0001) AM_READWRITE(changela_68705_port_b_r, changela_68705_port_b_w)
+ AM_RANGE(0x0002, 0x0002) AM_READWRITE(changela_68705_port_c_r, changela_68705_port_c_w)
+
+ AM_RANGE(0x0004, 0x0004) AM_WRITE(changela_68705_ddr_a_w)
+ AM_RANGE(0x0005, 0x0005) AM_WRITE(changela_68705_ddr_b_w)
+ AM_RANGE(0x0006, 0x0006) AM_WRITE(changela_68705_ddr_c_w)
+
+ AM_RANGE(0x0000, 0x007f) AM_RAM
+ AM_RANGE(0x0080, 0x07ff) AM_ROM
+ADDRESS_MAP_END
+
+
+
+/* U30 */
+READ8_MEMBER(changela_state::changela_24_r)
+{
+ return ((m_port_c_out & 2) << 2) | 7; /* bits 2,1,0-N/C inputs */
+}
+
+READ8_MEMBER(changela_state::changela_25_r)
+{
+ //collisions on bits 3,2, bits 1,0-N/C inputs
+ return (m_tree1_col << 3) | (m_tree0_col << 2) | 0x03;
+}
+
+READ8_MEMBER(changela_state::changela_30_r)
+{
+ return ioport("WHEEL")->read() & 0x0f; //wheel control (clocked input) signal on bits 3,2,1,0
+}
+
+READ8_MEMBER(changela_state::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. */
+ UINT8 curr_value = ioport("WHEEL")->read();
+
+ if ((curr_value < m_prev_value_31 && (m_prev_value_31 - curr_value) < 0x80)
+ || (curr_value > m_prev_value_31 && (curr_value - m_prev_value_31) > 0x80))
+ m_dir_31 = 1;
+ if ((m_prev_value_31 < curr_value && (curr_value - m_prev_value_31) < 0x80)
+ || (m_prev_value_31 > curr_value && (m_prev_value_31 - curr_value) > 0x80))
+ m_dir_31 = 0;
+
+ m_prev_value_31 = curr_value;
+
+ //wheel UP/DOWN control signal on bit 3, collisions on bits:2,1,0
+ return (m_dir_31 << 3) | (m_left_bank_col << 2) | (m_right_bank_col << 1) | m_boat_shore_col;
+}
+
+READ8_MEMBER(changela_state::changela_2c_r)
+{
+ int val = ioport("IN0")->read();
+
+ val = (val & 0x30) | ((val & 1) << 7) | (((val & 1) ^ 1) << 6);
+
+ return val;
+}
+
+READ8_MEMBER(changela_state::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 ((m_screen->vpos() & 0xf8) == 0xf8)
+ v8 = 1;
+
+ /* Gas pedal is made up of 2 switches, 1 active low, 1 active high */
+ switch (ioport("IN1")->read() & 0x03)
+ {
+ case 0x02:
+ gas = 0x80;
+ break;
+ case 0x01:
+ gas = 0x00;
+ break;
+ default:
+ gas = 0x40;
+ break;
+ }
+
+ return (ioport("IN1")->read() & 0x20) | gas | (v8 << 4);
+}
+
+WRITE8_MEMBER(changela_state::mcu_pc_0_w)
+{
+ m_port_c_in = (m_port_c_in & 0xfe) | (data & 1);
+}
+
+WRITE8_MEMBER(changela_state::changela_collision_reset_0)
+{
+ m_collision_reset = data & 0x01;
+}
+
+WRITE8_MEMBER(changela_state::changela_collision_reset_1)
+{
+ m_tree_collision_reset = data & 0x01;
+}
+
+WRITE8_MEMBER(changela_state::changela_coin_counter_w)
+{
+ coin_counter_w(machine(), offset, data);
+}
+
+
+static ADDRESS_MAP_START( changela_map, AS_PROGRAM, 8, changela_state )
+ AM_RANGE(0x0000, 0x7fff) AM_ROM
+ AM_RANGE(0x8000, 0x83ff) AM_RAM AM_SHARE("spriteram") /* OBJ0 RAM */
+ AM_RANGE(0x9000, 0x97ff) AM_RAM AM_SHARE("videoram") /* OBJ1 RAM */
+ AM_RANGE(0xa000, 0xa07f) AM_WRITE(changela_colors_w) AM_SHARE("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_ROM
+
+ AM_RANGE(0xc000, 0xc7ff) AM_READWRITE(changela_mem_device_r, changela_mem_device_w) /* RAM4 (River Bed RAM); RAM5 (Tree RAM) */
+
+ /* LS138 - U16 */
+ AM_RANGE(0xc800, 0xc800) AM_WRITENOP /* 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, 0xd001) AM_DEVREADWRITE("ay1", ay8910_device, data_r, address_data_w)
+ AM_RANGE(0xd010, 0xd011) AM_DEVREADWRITE("ay2", ay8910_device, data_r, address_data_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_WRITENOP
+
+ /* LS139 - U24 */
+ AM_RANGE(0xd024, 0xd024) AM_READWRITE(changela_24_r, mcu_pc_0_w)
+ AM_RANGE(0xd025, 0xd025) AM_READWRITE(changela_25_r, changela_collision_reset_1)
+ AM_RANGE(0xd026, 0xd026) AM_WRITENOP
+ 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_READWRITE(changela_30_r, mcu_w)
+ AM_RANGE(0xd031, 0xd031) AM_READ(changela_31_r)
+
+ AM_RANGE(0xe000, 0xe000) AM_WRITE(watchdog_reset_w) /* Watchdog */
+
+ AM_RANGE(0xf000, 0xf7ff) AM_RAM /* RAM2 (Processor RAM) */
+ADDRESS_MAP_END
+
+
+static INPUT_PORTS_START( changela )
+ PORT_START("DSWA") /* DSWA */
+ PORT_DIPNAME( 0x07, 0x01, "Steering Wheel Ratio" ) PORT_DIPLOCATION("SWA:1,2,3")
+ //PORT_DIPSETTING( 0x00, "?" ) /* Not documented */
+ PORT_DIPSETTING( 0x01, "Recommended Setting" )
+ //PORT_DIPSETTING( 0x02, "?" ) /* Not documented */
+ //PORT_DIPSETTING( 0x03, "?" ) /* Not documented */
+ //PORT_DIPSETTING( 0x04, "?" ) /* Not documented */
+ //PORT_DIPSETTING( 0x05, "?" ) /* Not documented */
+ //PORT_DIPSETTING( 0x06, "?" ) /* Not documented */
+ //PORT_DIPSETTING( 0x07, "?" ) /* Not documented */
+ PORT_DIPNAME( 0x08, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SWA:4")
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x00, "Ignore Memory Failures" ) PORT_DIPLOCATION("SWA:5")
+ PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x20, 0x00, DEF_STR( Controls ) ) PORT_DIPLOCATION("SWA:6")
+ PORT_DIPSETTING( 0x20, DEF_STR( Joystick ) )
+ PORT_DIPSETTING( 0x00, "Steering Wheel" )
+ PORT_DIPNAME( 0x40, 0x40, "Diagnostic" ) PORT_DIPLOCATION("SWA:7")
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x00, DEF_STR( Players ) ) PORT_DIPLOCATION("SWA:8")
+ PORT_DIPSETTING( 0x80, "1" )
+ PORT_DIPSETTING( 0x00, "2" )
+
+ PORT_START("DSWB") /* DSWB */
+ PORT_DIPNAME( 0x03, 0x00, "Max Bonus Fuels" ) PORT_DIPLOCATION("SWB:1,2")
+ PORT_DIPSETTING( 0x01, "1" )
+ PORT_DIPSETTING( 0x02, "2" )
+ PORT_DIPSETTING( 0x03, "3" )
+ PORT_DIPSETTING( 0x00, "99" )
+ PORT_DIPNAME( 0x0c, 0x08, "Game Difficulty" ) PORT_DIPLOCATION("SWB:3,4")
+ 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_DIPLOCATION("SWB:5,6")
+ 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_DIPLOCATION("SWB:7")
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x00, "Car Collision Enabled" ) PORT_DIPLOCATION("SWB:8")
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+
+ PORT_START("DSWC") /* DSWC - coinage */
+ PORT_DIPNAME( 0xf0, 0x10, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SWC:5,6,7,8")
+ 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_DIPLOCATION("SWC:1,2,3,4")
+ 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("DSWD") /* DSWD - bonus */
+ PORT_DIPNAME( 0x01, 0x01, "Right Slot" ) PORT_DIPLOCATION("SWD:1")
+ PORT_DIPSETTING( 0x01, "On Right (Bottom) Counter" )
+ PORT_DIPSETTING( 0x00, "On Left (Top) Counter" )
+ PORT_DIPNAME( 0x02, 0x02, "Left Slot" ) PORT_DIPLOCATION("SWD:2")
+ PORT_DIPSETTING( 0x02, "On Right (Bottom) Counter" )
+ PORT_DIPSETTING( 0x00, "On Left (Top) Counter" )
+ PORT_DIPNAME( 0x1c, 0x00, "Credits For Bonus" ) PORT_DIPLOCATION("SWD:3,4,5")
+ 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_DIPLOC( 0x20, IP_ACTIVE_LOW, "SWD:6" ) /* Listed as "Unused" */
+ PORT_DIPNAME( 0x40, 0x00, "'King Of The World' Name Length" )PORT_DIPLOCATION("SWD:7")
+ PORT_DIPSETTING( 0x40, "3 Letters" )
+ PORT_DIPSETTING( 0x00, "Long" )
+ PORT_DIPNAME( 0x80, 0x00, "'King Of The World' Name" ) PORT_DIPLOCATION("SWD:8")
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+
+ PORT_START("MCU") /* MCU */
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SERVICE )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_DIPNAME( 0x30, 0x30, "Self Test Switch" ) PORT_DIPLOCATION("SWT:1,2")
+ //PORT_DIPSETTING( 0x00, "?" ) /* Not possible, 3-state switch */
+ PORT_DIPSETTING( 0x20, "Free Game" ) /* "Puts a credit on the game without increasing the coin counter." */
+ PORT_DIPSETTING( 0x10, DEF_STR( Test ) )
+ PORT_DIPSETTING( 0x30, DEF_STR( Off ) )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )
+
+ PORT_START("IN0") /* 0xDx2C */
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Gear Shift") PORT_CODE(KEYCODE_SPACE) PORT_TOGGLE /* Gear shift */
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_CONDITION("DSWA", 0x20, EQUALS, 0x20)
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_CONDITION("DSWA", 0x20, EQUALS, 0x20)
+ 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("IN1") /* 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("WHEEL") /* 0xDx30 DRIVING_WHEEL */
+ PORT_BIT( 0xff, 0x00, IPT_DIAL ) PORT_MINMAX(0x00, 0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(8) PORT_CONDITION("DSWA", 0x20, EQUALS, 0x00)
+INPUT_PORTS_END
+
+TIMER_DEVICE_CALLBACK_MEMBER(changela_state::changela_scanline)
+{
+ int scanline = param;
+
+ if(scanline == 256) // vblank irq
+ m_maincpu->set_input_line_and_vector(0, HOLD_LINE,0xdf);
+ else if(((scanline % 64) == 0)) // timer irq, 3 times per given vblank field
+ m_maincpu->set_input_line_and_vector(0, HOLD_LINE,0xcf);
+}
+
+INTERRUPT_GEN_MEMBER(changela_state::chl_mcu_irq)
+{
+ generic_pulse_irq_line(m_mcu, 0, 1);
+}
+
+void changela_state::machine_start()
+{
+ /* video */
+ save_item(NAME(m_slopeROM_bank));
+ save_item(NAME(m_tree_en));
+ save_item(NAME(m_horizon));
+ save_item(NAME(m_mem_dev_selected));
+ save_item(NAME(m_v_count_river));
+ save_item(NAME(m_v_count_tree));
+ save_item(NAME(m_tree_on));
+
+ /* mcu */
+ save_item(NAME(m_port_a_in));
+ save_item(NAME(m_port_a_out));
+ save_item(NAME(m_ddr_a));
+ save_item(NAME(m_port_b_out));
+ save_item(NAME(m_ddr_b));
+ save_item(NAME(m_port_c_in));
+ save_item(NAME(m_port_c_out));
+ save_item(NAME(m_ddr_c));
+
+ save_item(NAME(m_mcu_out));
+ save_item(NAME(m_mcu_in));
+ save_item(NAME(m_mcu_pc_1));
+ save_item(NAME(m_mcu_pc_0));
+
+ /* misc */
+ save_item(NAME(m_tree0_col));
+ save_item(NAME(m_tree1_col));
+ save_item(NAME(m_left_bank_col));
+ save_item(NAME(m_right_bank_col));
+ save_item(NAME(m_boat_shore_col));
+ save_item(NAME(m_collision_reset));
+ save_item(NAME(m_tree_collision_reset));
+ save_item(NAME(m_prev_value_31));
+ save_item(NAME(m_dir_31));
+}
+
+void changela_state::machine_reset()
+{
+ /* video */
+ m_slopeROM_bank = 0;
+ m_tree_en = 0;
+ m_horizon = 0;
+ m_mem_dev_selected = 0;
+ m_v_count_river = 0;
+ m_v_count_tree = 0;
+ m_tree_on[0] = 0;
+ m_tree_on[1] = 0;
+
+ /* mcu */
+ m_mcu_pc_1 = 0;
+ m_mcu_pc_0 = 0;
+
+ m_port_a_in = 0;
+ m_port_a_out = 0;
+ m_ddr_a = 0;
+ m_port_b_out = 0;
+ m_ddr_b = 0;
+ m_port_c_in = 0;
+ m_port_c_out = 0;
+ m_ddr_c = 0;
+ m_mcu_out = 0;
+ m_mcu_in = 0;
+
+ /* misc */
+ m_tree0_col = 0;
+ m_tree1_col = 0;
+ m_left_bank_col = 0;
+ m_right_bank_col = 0;
+ m_boat_shore_col = 0;
+ m_collision_reset = 0;
+ m_tree_collision_reset = 0;
+ m_prev_value_31 = 0;
+ m_dir_31 = 0;
+}
+
+static MACHINE_CONFIG_START( changela, changela_state )
+
+ MCFG_CPU_ADD("maincpu", Z80,5000000)
+ MCFG_CPU_PROGRAM_MAP(changela_map)
+ MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", changela_state, changela_scanline, "screen", 0, 1)
+
+ MCFG_CPU_ADD("mcu", M68705,2500000)
+ MCFG_CPU_PROGRAM_MAP(mcu_map)
+ MCFG_CPU_VBLANK_INT_DRIVER("screen", changela_state, chl_mcu_irq)
+
+
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(60)
+ MCFG_SCREEN_SIZE(32*8, 262) /* vert size is a guess */
+ MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 4*8, 32*8-1)
+ MCFG_SCREEN_UPDATE_DRIVER(changela_state, screen_update_changela)
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_PALETTE_ADD("palette", 0x40)
+
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("ay1", AY8910, 1250000)
+ MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSWA"))
+ MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSWB"))
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+
+ MCFG_SOUND_ADD("ay2", AY8910, 1250000)
+ MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSWC"))
+ MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSWD"))
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+MACHINE_CONFIG_END
+
+
+ROM_START( changela )
+ ROM_REGION( 0x10000, "maincpu", 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, "mcu", 0 ) /* 68705U3 */
+ ROM_LOAD( "cl38a", 0x0000, 0x800, CRC(b70156ce) SHA1(c5eab8bbd65c4f587426298da4e22f991ce01dde) )
+
+ ROM_REGION( 0x4000, "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, "gfx2", 0 ) /* obj 1 data */
+ ROM_LOAD( "cl46", 0x0000, 0x1000, CRC(9c0a7d28) SHA1(fac9180ea0d9aeea56a84b35cc0958f0dd86a801) )
+
+ ROM_REGION( 0x8000, "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, "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, "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, "proms", 0 )
+ ROM_LOAD( "cl88", 0x0000, 0x0020, CRC(da4d6625) SHA1(2d9a268973518252eb36f479ab650af8c16c885c) ) /* math train state machine */
+ROM_END
+
+GAMEL( 1983, changela, 0, changela, changela, driver_device, 0, ROT180, "Taito Corporation", "Change Lanes", MACHINE_SUPPORTS_SAVE, layout_changela )