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-rw-r--r--trunk/src/mame/audio/n8080.c633
1 files changed, 633 insertions, 0 deletions
diff --git a/trunk/src/mame/audio/n8080.c b/trunk/src/mame/audio/n8080.c
new file mode 100644
index 00000000000..0f7cd691515
--- /dev/null
+++ b/trunk/src/mame/audio/n8080.c
@@ -0,0 +1,633 @@
+/***************************************************************************
+
+ Nintendo 8080 sound emulation
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+#include "sound/sn76477.h"
+#include "sound/dac.h"
+#include "includes/n8080.h"
+
+static const double ATTACK_RATE = 10e-6 * 500;
+static const double DECAY_RATE = 10e-6 * 16000;
+
+static const sn76477_interface sheriff_sn76477_interface =
+{
+ RES_K(36) , /* 04 */
+ RES_K(100) , /* 05 */
+ CAP_N(1) , /* 06 */
+ RES_K(620) , /* 07 */
+ CAP_U(1) , /* 08 */
+ RES_K(20) , /* 10 */
+ RES_K(150) , /* 11 */
+ RES_K(47) , /* 12 */
+ 0 , /* 16 */
+ CAP_N(1) , /* 17 */
+ RES_M(1.5) , /* 18 */
+ 0 , /* 19 */
+ RES_M(1.5) , /* 20 */
+ CAP_N(47) , /* 21 */
+ CAP_N(47) , /* 23 */
+ RES_K(560) , /* 24 */
+ 0, /* 22 vco */
+ 0, /* 26 mixer A */
+ 0, /* 25 mixer B */
+ 0, /* 27 mixer C */
+ 1, /* 1 envelope 1 */
+ 0, /* 28 envelope 2 */
+ 1 /* 9 enable */
+};
+
+
+static const sn76477_interface spacefev_sn76477_interface =
+{
+ RES_K(36) , /* 04 */
+ RES_K(150) , /* 05 */
+ CAP_N(1) , /* 06 */
+ RES_M(1) , /* 07 */
+ CAP_U(1) , /* 08 */
+ RES_K(20) , /* 10 */
+ RES_K(150) , /* 11 */
+ RES_K(47) , /* 12 */
+ 0 , /* 16 */
+ CAP_N(1) , /* 17 */
+ RES_M(1.5) , /* 18 */
+ 0 , /* 19 */
+ RES_M(1) , /* 20 */
+ CAP_N(47) , /* 21 */
+ CAP_N(47) , /* 23 */
+ RES_K(820) , /* 24 */
+ 0, /* 22 vco */
+ 0, /* 26 mixer A */
+ 0, /* 25 mixer B */
+ 0, /* 27 mixer C */
+ 1, /* 1 envelope 1 */
+ 0, /* 28 envelope 2 */
+ 1 /* 9 enable */
+};
+
+
+static void spacefev_update_SN76477_status( device_t *sn )
+{
+ n8080_state *state = sn->machine().driver_data<n8080_state>();
+ double dblR0 = RES_M(1.0);
+ double dblR1 = RES_M(1.5);
+
+ if (!state->m_mono_flop[0])
+ {
+ dblR0 = 1 / (1 / RES_K(150) + 1 / dblR0); /* ? */
+ }
+ if (!state->m_mono_flop[1])
+ {
+ dblR1 = 1 / (1 / RES_K(620) + 1 / dblR1); /* ? */
+ }
+
+ sn76477_decay_res_w(sn, dblR0);
+
+ sn76477_vco_res_w(sn, dblR1);
+
+ sn76477_enable_w(sn,
+ !state->m_mono_flop[0] &&
+ !state->m_mono_flop[1] &&
+ !state->m_mono_flop[2]);
+
+ sn76477_vco_w(sn, state->m_mono_flop[1]);
+
+ sn76477_mixer_b_w(sn, state->m_mono_flop[0]);
+}
+
+
+static void sheriff_update_SN76477_status( device_t *sn )
+{
+ n8080_state *state = sn->machine().driver_data<n8080_state>();
+ if (state->m_mono_flop[1])
+ {
+ sn76477_vco_voltage_w(sn, 5);
+ }
+ else
+ {
+ sn76477_vco_voltage_w(sn, 0);
+ }
+
+ sn76477_enable_w(sn,
+ !state->m_mono_flop[0] &&
+ !state->m_mono_flop[1]);
+
+ sn76477_vco_w(sn, state->m_mono_flop[0]);
+
+ sn76477_mixer_b_w(sn, !state->m_mono_flop[0]);
+}
+
+
+static void update_SN76477_status( device_t *device )
+{
+ n8080_state *state = device->machine().driver_data<n8080_state>();
+ if (state->m_n8080_hardware == 1)
+ {
+ spacefev_update_SN76477_status(device);
+ }
+ if (state->m_n8080_hardware == 2)
+ {
+ sheriff_update_SN76477_status(device);
+ }
+}
+
+
+static void start_mono_flop( device_t *sn, int n, attotime expire )
+{
+ n8080_state *state = sn->machine().driver_data<n8080_state>();
+ state->m_mono_flop[n] = 1;
+
+ update_SN76477_status(sn);
+
+ state->m_sound_timer[n]->adjust(expire, n);
+}
+
+
+static void stop_mono_flop( device_t *sn, int n )
+{
+ n8080_state *state = sn->machine().driver_data<n8080_state>();
+ state->m_mono_flop[n] = 0;
+
+ update_SN76477_status(sn);
+
+ state->m_sound_timer[n]->adjust(attotime::never, n);
+}
+
+
+static TIMER_CALLBACK( stop_mono_flop_callback )
+{
+ stop_mono_flop(machine.device("snsnd"), param);
+}
+
+
+static void spacefev_sound_pins_changed( running_machine &machine )
+{
+ device_t *sn = machine.device("snsnd");
+ n8080_state *state = machine.driver_data<n8080_state>();
+ UINT16 changes = ~state->m_curr_sound_pins & state->m_prev_sound_pins;
+
+ if (changes & (1 << 0x3))
+ {
+ stop_mono_flop(sn, 1);
+ }
+ if (changes & ((1 << 0x3) | (1 << 0x6)))
+ {
+ stop_mono_flop(sn, 2);
+ }
+ if (changes & (1 << 0x3))
+ {
+ start_mono_flop(sn, 0, attotime::from_usec(550 * 36 * 100));
+ }
+ if (changes & (1 << 0x6))
+ {
+ start_mono_flop(sn, 1, attotime::from_usec(550 * 22 * 33));
+ }
+ if (changes & (1 << 0x4))
+ {
+ start_mono_flop(sn, 2, attotime::from_usec(550 * 22 * 33));
+ }
+ if (changes & ((1 << 0x2) | (1 << 0x3) | (1 << 0x5)))
+ {
+ generic_pulse_irq_line(machine.device("audiocpu"), 0, 2);
+ }
+}
+
+
+static void sheriff_sound_pins_changed( running_machine &machine )
+{
+ device_t *sn = machine.device("snsnd");
+ n8080_state *state = machine.driver_data<n8080_state>();
+ UINT16 changes = ~state->m_curr_sound_pins & state->m_prev_sound_pins;
+
+ if (changes & (1 << 0x6))
+ {
+ stop_mono_flop(sn, 1);
+ }
+ if (changes & (1 << 0x6))
+ {
+ start_mono_flop(sn, 0, attotime::from_usec(550 * 33 * 33));
+ }
+ if (changes & (1 << 0x4))
+ {
+ start_mono_flop(sn, 1, attotime::from_usec(550 * 33 * 33));
+ }
+ if (changes & ((1 << 0x2) | (1 << 0x3) | (1 << 0x5)))
+ {
+ generic_pulse_irq_line(machine.device("audiocpu"), 0, 2);
+ }
+}
+
+
+static void helifire_sound_pins_changed( running_machine &machine )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+ UINT16 changes = ~state->m_curr_sound_pins & state->m_prev_sound_pins;
+
+ /* ((state->m_curr_sound_pins >> 0xa) & 1) not emulated */
+ /* ((state->m_curr_sound_pins >> 0xb) & 1) not emulated */
+ /* ((state->m_curr_sound_pins >> 0xc) & 1) not emulated */
+
+ if (changes & (1 << 6))
+ {
+ generic_pulse_irq_line(machine.device("audiocpu"), 0, 2);
+ }
+}
+
+
+static void sound_pins_changed( running_machine &machine )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ if (state->m_n8080_hardware == 1)
+ spacefev_sound_pins_changed(machine);
+ if (state->m_n8080_hardware == 2)
+ sheriff_sound_pins_changed(machine);
+ if (state->m_n8080_hardware == 3)
+ helifire_sound_pins_changed(machine);
+
+ state->m_prev_sound_pins = state->m_curr_sound_pins;
+}
+
+
+static void delayed_sound_1( running_machine &machine, int data )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ state->m_curr_sound_pins &= ~(
+ (1 << 0x7) |
+ (1 << 0x5) |
+ (1 << 0x6) |
+ (1 << 0x3) |
+ (1 << 0x4) |
+ (1 << 0x1));
+
+ if (~data & 0x01) state->m_curr_sound_pins |= 1 << 0x7;
+ if (~data & 0x02) state->m_curr_sound_pins |= 1 << 0x5; /* pulse */
+ if (~data & 0x04) state->m_curr_sound_pins |= 1 << 0x6; /* pulse */
+ if (~data & 0x08) state->m_curr_sound_pins |= 1 << 0x3; /* pulse (except in Helifire) */
+ if (~data & 0x10) state->m_curr_sound_pins |= 1 << 0x4; /* pulse (except in Helifire) */
+ if (~data & 0x20) state->m_curr_sound_pins |= 1 << 0x1;
+
+ if (state->m_n8080_hardware == 1)
+ {
+ if (data & ~state->m_prev_snd_data & 0x10)
+ {
+ spacefev_start_red_cannon(machine);
+ }
+
+ state->m_spacefev_red_screen = data & 0x08;
+ }
+
+ sound_pins_changed(machine);
+
+ state->m_prev_snd_data = data;
+}
+
+
+static TIMER_CALLBACK( delayed_sound_1_callback )
+{
+ delayed_sound_1(machine, param);
+}
+
+
+static void delayed_sound_2( running_machine &machine, int data )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ state->m_curr_sound_pins &= ~(
+ (1 << 0x8) |
+ (1 << 0x9) |
+ (1 << 0xa) |
+ (1 << 0xb) |
+ (1 << 0x2) |
+ (1 << 0xc));
+
+ if (~data & 0x01) state->m_curr_sound_pins |= 1 << 0x8;
+ if (~data & 0x02) state->m_curr_sound_pins |= 1 << 0x9;
+ if (~data & 0x04) state->m_curr_sound_pins |= 1 << 0xa;
+ if (~data & 0x08) state->m_curr_sound_pins |= 1 << 0xb;
+ if (~data & 0x10) state->m_curr_sound_pins |= 1 << 0x2; /* pulse */
+ if (~data & 0x20) state->m_curr_sound_pins |= 1 << 0xc;
+
+ if (state->m_n8080_hardware == 1)
+ state->flip_screen_set_no_update(data & 0x20);
+ if (state->m_n8080_hardware == 3)
+ state->m_helifire_flash = data & 0x20;
+
+ sound_pins_changed(machine);
+}
+
+
+static TIMER_CALLBACK( delayed_sound_2_callback )
+{
+ delayed_sound_2(machine, param);
+}
+
+
+WRITE8_MEMBER(n8080_state::n8080_sound_1_w)
+{
+ machine().scheduler().synchronize(FUNC(delayed_sound_1_callback), data); /* force CPUs to sync */
+}
+
+WRITE8_MEMBER(n8080_state::n8080_sound_2_w)
+{
+ machine().scheduler().synchronize(FUNC(delayed_sound_2_callback), data); /* force CPUs to sync */
+}
+
+
+READ8_MEMBER(n8080_state::n8080_8035_p1_r)
+{
+ UINT8 val = 0;
+
+ if ((m_curr_sound_pins >> 0xb) & 1) val |= 0x01;
+ if ((m_curr_sound_pins >> 0xa) & 1) val |= 0x02;
+ if ((m_curr_sound_pins >> 0x9) & 1) val |= 0x04;
+ if ((m_curr_sound_pins >> 0x8) & 1) val |= 0x08;
+ if ((m_curr_sound_pins >> 0x5) & 1) val |= 0x10;
+ if ((m_curr_sound_pins >> 0x3) & 1) val |= 0x20;
+ if ((m_curr_sound_pins >> 0x2) & 1) val |= 0x40;
+ if ((m_curr_sound_pins >> 0x1) & 1) val |= 0x80;
+
+ return val;
+}
+
+
+READ8_MEMBER(n8080_state::n8080_8035_t0_r)
+{
+ return (m_curr_sound_pins >> 0x7) & 1;
+}
+READ8_MEMBER(n8080_state::n8080_8035_t1_r)
+{
+ return (m_curr_sound_pins >> 0xc) & 1;
+}
+
+
+READ8_MEMBER(n8080_state::helifire_8035_t0_r)
+{
+ return (m_curr_sound_pins >> 0x3) & 1;
+}
+READ8_MEMBER(n8080_state::helifire_8035_t1_r)
+{
+ return (m_curr_sound_pins >> 0x4) & 1;
+}
+
+
+READ8_MEMBER(n8080_state::helifire_8035_external_ram_r)
+{
+ UINT8 val = 0;
+
+ if ((m_curr_sound_pins >> 0x7) & 1) val |= 0x01;
+ if ((m_curr_sound_pins >> 0x8) & 1) val |= 0x02;
+ if ((m_curr_sound_pins >> 0x9) & 1) val |= 0x04;
+ if ((m_curr_sound_pins >> 0x1) & 1) val |= 0x08;
+
+ return val;
+}
+
+
+READ8_MEMBER(n8080_state::helifire_8035_p2_r)
+{
+ return ((m_curr_sound_pins >> 0xc) & 1) ? 0x10 : 0x00; /* not used */
+}
+
+
+WRITE8_MEMBER(n8080_state::n8080_dac_w)
+{
+ dac_data_w(machine().device("dac"), data & 0x80);
+}
+
+
+WRITE8_MEMBER(n8080_state::helifire_dac_w)
+{
+ dac_data_w(machine().device("dac"), data * m_helifire_dac_volume);
+}
+
+
+WRITE8_MEMBER(n8080_state::helifire_sound_ctrl_w)
+{
+ m_helifire_dac_phase = data & 0x80;
+
+ /* data & 0x40 not emulated */
+ /* data & 0x20 not emulated */
+
+ if (m_helifire_dac_phase)
+ {
+ m_helifire_dac_timing = ATTACK_RATE * log(1 - m_helifire_dac_volume);
+ }
+ else
+ {
+ m_helifire_dac_timing = DECAY_RATE * log(m_helifire_dac_volume);
+ }
+
+ m_helifire_dac_timing += machine().time().as_double();
+}
+
+
+static TIMER_DEVICE_CALLBACK( spacefev_vco_voltage_timer )
+{
+ device_t *sn = timer.machine().device("snsnd");
+ n8080_state *state = timer.machine().driver_data<n8080_state>();
+ double voltage = 0;
+
+ if (state->m_mono_flop[2])
+ {
+ voltage = 5 * (1 - exp(- state->m_sound_timer[2]->elapsed().as_double() / 0.22));
+ }
+
+ sn76477_vco_voltage_w(sn, voltage);
+}
+
+
+static TIMER_DEVICE_CALLBACK( helifire_dac_volume_timer )
+{
+ n8080_state *state = timer.machine().driver_data<n8080_state>();
+ double t = state->m_helifire_dac_timing - timer.machine().time().as_double();
+
+ if (state->m_helifire_dac_phase)
+ {
+ state->m_helifire_dac_volume = 1 - exp(t / ATTACK_RATE);
+ }
+ else
+ {
+ state->m_helifire_dac_volume = exp(t / DECAY_RATE);
+ }
+}
+
+
+MACHINE_START( spacefev_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ state->m_sound_timer[0] = machine.scheduler().timer_alloc(FUNC(stop_mono_flop_callback));
+ state->m_sound_timer[1] = machine.scheduler().timer_alloc(FUNC(stop_mono_flop_callback));
+ state->m_sound_timer[2] = machine.scheduler().timer_alloc(FUNC(stop_mono_flop_callback));
+
+ state->save_item(NAME(state->m_prev_snd_data));
+ state->save_item(NAME(state->m_prev_sound_pins));
+ state->save_item(NAME(state->m_curr_sound_pins));
+ state->save_item(NAME(state->m_n8080_hardware));
+ state->save_item(NAME(state->m_mono_flop));
+}
+
+MACHINE_RESET( spacefev_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+ state->m_n8080_hardware = 1;
+
+ state->m_mono_flop[0] = 0;
+ state->m_mono_flop[1] = 0;
+ state->m_mono_flop[2] = 0;
+ state->m_prev_snd_data = 0;
+ state->m_prev_sound_pins = 0;
+ state->m_curr_sound_pins = 0;
+
+ delayed_sound_1(machine, 0);
+ delayed_sound_2(machine, 0);
+}
+
+
+MACHINE_START( sheriff_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ state->m_sound_timer[0] = machine.scheduler().timer_alloc(FUNC(stop_mono_flop_callback));
+ state->m_sound_timer[1] = machine.scheduler().timer_alloc(FUNC(stop_mono_flop_callback));
+
+ state->save_item(NAME(state->m_prev_snd_data));
+ state->save_item(NAME(state->m_prev_sound_pins));
+ state->save_item(NAME(state->m_curr_sound_pins));
+ state->save_item(NAME(state->m_n8080_hardware));
+ state->save_item(NAME(state->m_mono_flop));
+}
+
+MACHINE_RESET( sheriff_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+ state->m_n8080_hardware = 2;
+
+ state->m_mono_flop[0] = 0;
+ state->m_mono_flop[1] = 0;
+ state->m_prev_snd_data = 0;
+ state->m_prev_sound_pins = 0;
+ state->m_curr_sound_pins = 0;
+
+ delayed_sound_1(machine, 0);
+ delayed_sound_2(machine, 0);
+}
+
+
+MACHINE_START( helifire_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+
+ state->save_item(NAME(state->m_prev_snd_data));
+ state->save_item(NAME(state->m_prev_sound_pins));
+ state->save_item(NAME(state->m_curr_sound_pins));
+ state->save_item(NAME(state->m_n8080_hardware));
+ state->save_item(NAME(state->m_helifire_dac_volume));
+ state->save_item(NAME(state->m_helifire_dac_timing));
+ state->save_item(NAME(state->m_helifire_dac_phase));
+}
+
+MACHINE_RESET( helifire_sound )
+{
+ n8080_state *state = machine.driver_data<n8080_state>();
+ state->m_n8080_hardware = 3;
+
+ state->m_helifire_dac_volume = 1;
+ state->m_helifire_dac_timing = 0;
+ state->m_helifire_dac_phase = 0;
+ state->m_prev_snd_data = 0;
+ state->m_prev_sound_pins = 0;
+ state->m_curr_sound_pins = 0;
+
+ delayed_sound_1(machine, 0);
+ delayed_sound_2(machine, 0);
+}
+
+
+static ADDRESS_MAP_START( n8080_sound_cpu_map, AS_PROGRAM, 8, n8080_state )
+ ADDRESS_MAP_GLOBAL_MASK(0x3ff)
+ AM_RANGE(0x0000, 0x03ff) AM_ROM
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( n8080_sound_io_map, AS_IO, 8, n8080_state )
+ AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T0) AM_READ(n8080_8035_t0_r)
+ AM_RANGE(MCS48_PORT_T1, MCS48_PORT_T1) AM_READ(n8080_8035_t1_r)
+ AM_RANGE(MCS48_PORT_P1, MCS48_PORT_P1) AM_READ(n8080_8035_p1_r)
+
+ AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_WRITE(n8080_dac_w)
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( helifire_sound_io_map, AS_IO, 8, n8080_state )
+ AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T0) AM_READ(helifire_8035_t0_r)
+ AM_RANGE(MCS48_PORT_T1, MCS48_PORT_T1) AM_READ(helifire_8035_t1_r)
+ AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_READ(helifire_8035_p2_r)
+
+ AM_RANGE(0x00, 0x7f) AM_READ(helifire_8035_external_ram_r)
+
+ AM_RANGE(MCS48_PORT_P1, MCS48_PORT_P1) AM_WRITE(helifire_dac_w)
+ AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_WRITE(helifire_sound_ctrl_w)
+ADDRESS_MAP_END
+
+
+MACHINE_CONFIG_FRAGMENT( spacefev_sound )
+
+ /* basic machine hardware */
+ MCFG_CPU_ADD("audiocpu", I8035, 6000000)
+ MCFG_CPU_PROGRAM_MAP(n8080_sound_cpu_map)
+ MCFG_CPU_IO_MAP(n8080_sound_io_map)
+
+ MCFG_TIMER_ADD_PERIODIC("vco_timer", spacefev_vco_voltage_timer, attotime::from_hz(1000))
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("dac", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
+
+ MCFG_SOUND_ADD("snsnd", SN76477, 0)
+ MCFG_SOUND_CONFIG(spacefev_sn76477_interface)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.35)
+MACHINE_CONFIG_END
+
+
+MACHINE_CONFIG_FRAGMENT( sheriff_sound )
+
+ /* basic machine hardware */
+ MCFG_CPU_ADD("audiocpu", I8035, 6000000)
+ MCFG_CPU_PROGRAM_MAP(n8080_sound_cpu_map)
+ MCFG_CPU_IO_MAP(n8080_sound_io_map)
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("dac", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
+
+ MCFG_SOUND_ADD("snsnd", SN76477, 0)
+ MCFG_SOUND_CONFIG(sheriff_sn76477_interface)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.35)
+MACHINE_CONFIG_END
+
+
+MACHINE_CONFIG_FRAGMENT( helifire_sound )
+
+ /* basic machine hardware */
+ MCFG_CPU_ADD("audiocpu", I8035, 6000000)
+ MCFG_CPU_PROGRAM_MAP(n8080_sound_cpu_map)
+ MCFG_CPU_IO_MAP(helifire_sound_io_map)
+
+ MCFG_TIMER_ADD_PERIODIC("helifire_dac", helifire_dac_volume_timer, attotime::from_hz(1000) )
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("dac", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
+MACHINE_CONFIG_END