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diff --git a/src/mame/namco/wacky_gator.cpp b/src/mame/namco/wacky_gator.cpp
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+// license:GPL-2.0+
+// copyright-holders:FelipeSanches, Sandro Ronco
+//
+// Namco Gator Panic (Wani Wani Panic)
+// USA version distributed by Data East and renamed "Wacky Gator"
+//
+// Driver by Sandro Ronco and
+// Felipe Correa da Silva Sanches <juca@members.fsf.org>
+//
+
+/*
+ Most of this driver is based on guessing since I do not have access to the actual pcb for this game.
+ Once we get a pcb, please review the correctness of the code in this driver before deleting this comment.
+
+ TODO:
+ - IRQ and NMI sources are unknown
+ - proper PMM8713 and steppers emulation
+*/
+
+#include "emu.h"
+#include "cpu/m6809/m6809.h"
+#include "machine/i8255.h"
+#include "machine/pit8253.h"
+#include "machine/ticket.h"
+#include "machine/timer.h"
+#include "sound/msm5205.h"
+#include "sound/ymopl.h"
+#include "speaker.h"
+
+#include "wackygtr.lh"
+
+
+namespace {
+
+class wackygtr_state : public driver_device
+{
+public:
+ wackygtr_state(const machine_config &mconfig, device_type type, const char *tag) :
+ driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_msm(*this, "msm"),
+ m_pit8253(*this, "pit8253%u", 0U),
+ m_ticket(*this, "ticket"),
+ m_samples(*this, "oki"),
+ m_alligator(*this, "alligator%u", 0U),
+ m_digit(*this, "digit%u", 0U),
+ m_lamps(*this, "lamp%u", 0U)
+ { }
+
+ ioport_value alligators_rear_sensors_r();
+ ioport_value alligators_front_sensors_r();
+
+ void wackygtr(machine_config &config);
+
+private:
+ virtual void machine_start() override ATTR_COLD;
+ virtual void machine_reset() override ATTR_COLD;
+
+ void adpcm_int(int state);
+ void sample_ctrl_w(uint8_t data);
+ void alligators_ctrl1_w(uint8_t data);
+ void alligators_ctrl2_w(uint8_t data);
+
+ void set_lamps(int p, uint8_t value);
+ void status_lamps_w(uint8_t data);
+ template <unsigned N> void timing_lamps_w(uint8_t data) { set_lamps((N + 1) << 3, data); }
+
+ void set_digits(int p, uint8_t value);
+ template <unsigned N> void disp_w(uint8_t data) { set_digits(N << 1, data); }
+
+ void pmm8713_ck(int i, int state);
+ template <unsigned N> void alligator_ck(int state) { pmm8713_ck(N, state); }
+
+ void irq_ack_w(uint8_t data) { m_maincpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE); }
+ void firq_ack_w(uint8_t data) { m_maincpu->set_input_line(M6809_FIRQ_LINE, CLEAR_LINE); }
+
+ TIMER_DEVICE_CALLBACK_MEMBER(nmi_timer) { m_maincpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero); }
+
+ void program_map(address_map &map) ATTR_COLD;
+
+ required_device<cpu_device> m_maincpu;
+ required_device<msm5205_device> m_msm;
+ required_device_array<pit8253_device, 2> m_pit8253;
+ required_device<ticket_dispenser_device> m_ticket;
+ required_memory_region m_samples;
+ output_finder<5> m_alligator;
+ output_finder<8> m_digit;
+ output_finder<32> m_lamps;
+
+ int m_adpcm_sel;
+ uint16_t m_adpcm_pos;
+ uint8_t m_adpcm_ctrl;
+
+ uint8_t m_alligators_ctrl;
+ int m_motors_pos[5] = { };
+};
+
+
+void wackygtr_state::status_lamps_w(uint8_t data)
+{
+ /*
+ ---x xxxx status lamps
+ --x- ---- game over lamp
+ -x-- ---- coin counter
+ x--- ---- ticket dispenser
+ */
+
+ set_lamps(0, data & 0x3f);
+
+ machine().bookkeeping().coin_counter_w(0, BIT(data, 6));
+ m_ticket->motor_w(BIT(data, 7));
+}
+
+void wackygtr_state::sample_ctrl_w(uint8_t data)
+{
+ /*
+ --xx xxxx sample index
+ -x-- ---- ???
+ x--- ---- 5205 reset
+ */
+
+ m_adpcm_ctrl = data;
+ m_adpcm_pos = (data & 0x3f) * 0x400;
+ m_adpcm_sel = 0;
+ m_msm->reset_w(BIT(data, 7));
+}
+
+void wackygtr_state::alligators_ctrl1_w(uint8_t data)
+{
+ m_pit8253[0]->write_gate0(BIT(data, 0));
+ m_pit8253[0]->write_gate1(BIT(data, 1));
+ m_pit8253[0]->write_gate2(BIT(data, 2));
+ m_pit8253[1]->write_gate1(BIT(data, 3));
+ m_pit8253[1]->write_gate2(BIT(data, 4));
+
+ machine().bookkeeping().coin_lockout_w(0, data & 0x40 ? 0 : 1);
+}
+
+void wackygtr_state::alligators_ctrl2_w(uint8_t data)
+{
+ /*
+ ---- ---x PMM8713 0 U/D
+ ---- --x- PMM8713 1 U/D
+ ---- -x-- PMM8713 2 U/D
+ ---- x--- PMM8713 3 U/D
+ ---x ---- PMM8713 4 U/D
+ */
+
+ m_alligators_ctrl = data & 0x1f;
+}
+
+void wackygtr_state::pmm8713_ck(int i, int state)
+{
+ if (state)
+ {
+ m_motors_pos[i] += (BIT(m_alligators_ctrl, i) ? +1 : -1);
+
+ int alligator_state = m_motors_pos[i] / 10;
+ if (alligator_state > 5) alligator_state = 5;
+ if (alligator_state < 0) alligator_state = 0;
+ m_alligator[i] = alligator_state;
+ }
+}
+
+ioport_value wackygtr_state::alligators_rear_sensors_r()
+{
+ return ((m_motors_pos[0] < 10) ? 0x01 : 0) |
+ ((m_motors_pos[1] < 10) ? 0x02 : 0) |
+ ((m_motors_pos[2] < 10) ? 0x04 : 0) |
+ ((m_motors_pos[3] < 10) ? 0x08 : 0) |
+ ((m_motors_pos[4] < 10) ? 0x10 : 0) |
+ (m_alligators_ctrl ^ 0x1f);
+}
+
+ioport_value wackygtr_state::alligators_front_sensors_r()
+{
+ return ((m_motors_pos[0] < 5 || m_motors_pos[0] > 55) ? 0x01 : 0) |
+ ((m_motors_pos[1] < 5 || m_motors_pos[1] > 55) ? 0x02 : 0) |
+ ((m_motors_pos[2] < 5 || m_motors_pos[2] > 55) ? 0x04 : 0) |
+ ((m_motors_pos[3] < 5 || m_motors_pos[3] > 55) ? 0x08 : 0) |
+ ((m_motors_pos[4] < 5 || m_motors_pos[4] > 55) ? 0x10 : 0);
+}
+
+void wackygtr_state::machine_start()
+{
+ m_alligator.resolve();
+ m_digit.resolve();
+ m_lamps.resolve();
+
+ save_item(NAME(m_adpcm_sel));
+ save_item(NAME(m_adpcm_pos));
+ save_item(NAME(m_adpcm_ctrl));
+ save_item(NAME(m_alligators_ctrl));
+ save_item(NAME(m_motors_pos));
+}
+
+void wackygtr_state::machine_reset()
+{
+ m_adpcm_pos = 0;
+ m_adpcm_sel = 0;
+ m_adpcm_ctrl = 0x80;
+ m_alligators_ctrl = 0;
+}
+
+void wackygtr_state::set_digits(int p, uint8_t value)
+{
+ static constexpr uint8_t bcd2hex[] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x67, 0, 0, 0, 0, 0, 0 }; // not accurate
+ m_digit[p + 0] = bcd2hex[value & 0x0f];
+ m_digit[p + 1] = bcd2hex[(value >> 4) & 0x0f];
+}
+
+void wackygtr_state::set_lamps(int p, uint8_t value)
+{
+ for (int i=0; i<8; i++)
+ m_lamps[p + i] = BIT(value, i);
+}
+
+static INPUT_PORTS_START( wackygtr )
+ PORT_START("IN0")
+ PORT_BIT(0x1f, IP_ACTIVE_LOW, IPT_CUSTOM) PORT_CUSTOM_MEMBER(FUNC(wackygtr_state::alligators_rear_sensors_r))
+ PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_SERVICE)
+ PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_SERVICE1)
+ PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_COIN1)
+
+ PORT_START("IN1")
+ PORT_BIT(0x1f, IP_ACTIVE_LOW, IPT_CUSTOM) PORT_CUSTOM_MEMBER(FUNC(wackygtr_state::alligators_front_sensors_r))
+ PORT_DIPNAME( 0xe0, 0x00, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW:1,2,3")
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x60, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0xa0, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0xc0, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0xe0, DEF_STR( 2C_1C ) )
+
+ PORT_START("IN2")
+ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_POKER_HOLD1)
+ PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_POKER_HOLD2)
+ PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_POKER_HOLD3)
+ PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_POKER_HOLD4)
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_POKER_HOLD5)
+ PORT_DIPNAME( 0x20, 0x20, DEF_STR( Test ) ) PORT_DIPLOCATION("SW:4") // For factory Test use ONLY! Do not change
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
+ PORT_DIPNAME( 0x40, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW:5")
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Test ) ) PORT_DIPLOCATION("SW:6") // For factory Test use ONLY! Do not change
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+INPUT_PORTS_END
+
+void wackygtr_state::adpcm_int(int state)
+{
+ if (!(m_adpcm_ctrl & 0x80))
+ {
+ uint8_t data = m_samples->base()[m_adpcm_pos & 0xffff];
+ m_msm->data_w((m_adpcm_sel ? data : (data >> 4)) & 0x0f);
+ m_adpcm_pos += m_adpcm_sel;
+ m_adpcm_sel ^= 1;
+ }
+}
+
+void wackygtr_state::program_map(address_map &map)
+{
+ map(0x0200, 0x0200).nopr().w(FUNC(wackygtr_state::irq_ack_w));
+ map(0x0400, 0x0400).nopr().w(FUNC(wackygtr_state::firq_ack_w));
+ map(0x0600, 0x0600).w(FUNC(wackygtr_state::disp_w<0>));
+ map(0x0800, 0x0800).w(FUNC(wackygtr_state::disp_w<1>));
+ map(0x0a00, 0x0a00).w(FUNC(wackygtr_state::disp_w<2>));
+ map(0x0c00, 0x0c00).w(FUNC(wackygtr_state::disp_w<3>));
+ map(0x0e00, 0x0e00).w(FUNC(wackygtr_state::sample_ctrl_w));
+
+ map(0x1000, 0x1001).w("ymsnd", FUNC(ym2413_device::write));
+
+ map(0x2000, 0x2003).rw(m_pit8253[0], FUNC(pit8253_device::read), FUNC(pit8253_device::write));
+ map(0x3000, 0x3003).rw(m_pit8253[1], FUNC(pit8253_device::read), FUNC(pit8253_device::write));
+
+ map(0x4000, 0x4003).rw("i8255_0", FUNC(i8255_device::read), FUNC(i8255_device::write));
+ map(0x5000, 0x5003).rw("i8255_1", FUNC(i8255_device::read), FUNC(i8255_device::write));
+ map(0x6000, 0x6003).rw("i8255_2", FUNC(i8255_device::read), FUNC(i8255_device::write));
+
+ map(0x7000, 0x7fff).ram();
+ map(0x8000, 0xffff).rom();
+}
+
+void wackygtr_state::wackygtr(machine_config &config)
+{
+ MC6809(config, m_maincpu, XTAL(3'579'545)); // HD68B09P
+ m_maincpu->set_addrmap(AS_PROGRAM, &wackygtr_state::program_map);
+ m_maincpu->set_periodic_int(FUNC(wackygtr_state::irq0_line_assert), attotime::from_hz(50)); // FIXME
+
+ TIMER(config, "nmi_timer").configure_periodic(FUNC(wackygtr_state::nmi_timer), attotime::from_hz(100)); // FIXME
+
+ /* Video */
+ config.set_default_layout(layout_wackygtr);
+
+ /* Sound */
+ SPEAKER(config, "mono").front_center();
+ MSM5205(config, m_msm, XTAL(384'000));
+ m_msm->vck_legacy_callback().set(FUNC(wackygtr_state::adpcm_int)); /* IRQ handler */
+ m_msm->set_prescaler_selector(msm5205_device::S48_4B); /* 8 KHz, 4 Bits */
+ m_msm->add_route(ALL_OUTPUTS, "mono", 1.0);
+
+ ym2413_device &ymsnd(YM2413(config, "ymsnd", XTAL(3'579'545)));
+ ymsnd.add_route(ALL_OUTPUTS, "mono", 1.0);
+
+ i8255_device &ppi0(I8255(config, "i8255_0"));
+ ppi0.out_pa_callback().set(FUNC(wackygtr_state::status_lamps_w));
+ ppi0.out_pb_callback().set(FUNC(wackygtr_state::alligators_ctrl1_w));
+ ppi0.out_pc_callback().set(FUNC(wackygtr_state::alligators_ctrl2_w));
+
+ i8255_device &ppi1(I8255(config, "i8255_1"));
+ ppi1.out_pa_callback().set(FUNC(wackygtr_state::timing_lamps_w<0>));
+ ppi1.out_pb_callback().set(FUNC(wackygtr_state::timing_lamps_w<1>));
+ ppi1.out_pc_callback().set(FUNC(wackygtr_state::timing_lamps_w<2>));
+
+ i8255_device &ppi2(I8255(config, "i8255_2"));
+ ppi2.in_pa_callback().set_ioport("IN0");
+ ppi2.in_pb_callback().set_ioport("IN1");
+ ppi2.in_pc_callback().set_ioport("IN2");
+
+ PIT8253(config, m_pit8253[0], 0);
+ m_pit8253[0]->set_clk<0>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[0]->out_handler<0>().set(FUNC(wackygtr_state::alligator_ck<0>));
+ m_pit8253[0]->set_clk<1>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[0]->out_handler<1>().set(FUNC(wackygtr_state::alligator_ck<1>));
+ m_pit8253[0]->set_clk<2>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[0]->out_handler<2>().set(FUNC(wackygtr_state::alligator_ck<2>));
+
+ PIT8253(config, m_pit8253[1], 0);
+ m_pit8253[1]->set_clk<0>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[1]->out_handler<0>().set_inputline(m_maincpu, M6809_FIRQ_LINE);
+ m_pit8253[1]->set_clk<1>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[1]->out_handler<1>().set(FUNC(wackygtr_state::alligator_ck<3>));
+ m_pit8253[1]->set_clk<2>(XTAL(3'579'545)/16); // this is a guess
+ m_pit8253[1]->out_handler<2>().set(FUNC(wackygtr_state::alligator_ck<4>));
+
+ TICKET_DISPENSER(config, "ticket", attotime::from_msec(200));
+}
+
+
+ROM_START( wackygtr )
+ ROM_REGION(0x10000, "maincpu", 0)
+ ROM_LOAD("wp3-pr0.4d", 0x8000, 0x8000, CRC(71ca4437) SHA1(c7d948c5593e6053fd0a65601f6c06871f5861f0))
+
+ ROM_REGION(0x10000, "oki", 0)
+ ROM_LOAD("wp3-vo0.2h", 0x0000, 0x10000, CRC(91c7986f) SHA1(bc9fa0d41c1caa0f909a349f511d022b7e42c6cd))
+ROM_END
+
+} // anonymous namespace
+
+
+GAME(1988, wackygtr, 0, wackygtr, wackygtr, wackygtr_state, empty_init, ROT0, "Namco (Data East license)", "Wacky Gator (US)", MACHINE_NO_SOUND | MACHINE_NOT_WORKING | MACHINE_MECHANICAL | MACHINE_REQUIRES_ARTWORK)