// license:BSD-3-Clause // copyright-holders:Nicola Salmoria /*************************************************************************** This code is used by the following module: timeplt.cpp pooyan.cpp rallyx.cpp (for locomotn) tutankhm.cpp rocnrope.cpp ***************************************************************************/ #include "emu.h" #include "audio/timeplt.h" #include "machine/gen_latch.h" #include "speaker.h" DEFINE_DEVICE_TYPE(TIMEPLT_AUDIO, timeplt_audio_device, "timplt_audio", "Time Pilot Audio") DEFINE_DEVICE_TYPE(LOCOMOTN_AUDIO, locomotn_audio_device, "locomotn_audio", "Loco-Motion Audio") timeplt_audio_device::timeplt_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timeplt_audio_device(mconfig, TIMEPLT_AUDIO, tag, owner, clock) { } locomotn_audio_device::locomotn_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : timeplt_audio_device(mconfig, LOCOMOTN_AUDIO, tag, owner, clock) { } timeplt_audio_device::timeplt_audio_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock) , m_soundcpu(*this, "tpsound") , m_soundlatch(*this, "soundlatch") , m_filter_0(*this, "filter.0.%u", 0) , m_filter_1(*this, "filter.1.%u", 0) , m_last_irq_state(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void timeplt_audio_device::device_start() { m_last_irq_state = 0; save_item(NAME(m_last_irq_state)); } /************************************* * * Sound timer * *************************************/ /* The timer clock which feeds the upper 4 bits of */ /* AY-3-8910 port A is based on the same clock */ /* feeding the sound CPU Z80. It is a divide by */ /* 5120, formed by a standard divide by 512, */ /* followed by a divide by 10 using a 4 bit */ /* bi-quinary count sequence. (See LS90 data sheet */ /* for an example). */ /* */ /* Bit 4 comes from the output of the divide by 1024 */ /* 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 */ /* Bit 5 comes from the QC output of the LS90 producing a sequence of */ /* 0, 0, 1, 1, 0, 0, 1, 1, 1, 0 */ /* Bit 6 comes from the QD output of the LS90 producing a sequence of */ /* 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 */ /* Bit 7 comes from the QA output of the LS90 producing a sequence of */ /* 0, 0, 0, 0, 0, 1, 1, 1, 1, 1 */ uint8_t timeplt_audio_device::portB_r() { static const int timeplt_timer[10] = { 0x00, 0x10, 0x20, 0x30, 0x40, 0x90, 0xa0, 0xb0, 0xa0, 0xd0 }; return timeplt_timer[(m_soundcpu->total_cycles() / 512) % 10]; } /************************************* * * Filter controls * *************************************/ void timeplt_audio_device::set_filter(filter_rc_device &device, int data) { int C = 0; if (data & 1) C += 220000; /* 220000pF = 0.220uF */ if (data & 2) C += 47000; /* 47000pF = 0.047uF */ device.filter_rc_set_RC(filter_rc_device::LOWPASS, 1000, 5100, 0, CAP_P(C)); } void timeplt_audio_device::filter_w(offs_t offset, uint8_t data) { set_filter(*m_filter_1[0], (offset >> 0) & 3); set_filter(*m_filter_1[1], (offset >> 2) & 3); set_filter(*m_filter_1[2], (offset >> 4) & 3); set_filter(*m_filter_0[0], (offset >> 6) & 3); set_filter(*m_filter_0[1], (offset >> 8) & 3); set_filter(*m_filter_0[2], (offset >> 10) & 3); } /************************************* * * External interfaces * *************************************/ void timeplt_audio_device::sound_data_w(uint8_t data) { m_soundlatch->write(data); } WRITE_LINE_MEMBER(timeplt_audio_device::sh_irqtrigger_w) { if (m_last_irq_state == 0 && state) { /* setting bit 0 low then high triggers IRQ on the sound CPU */ m_soundcpu->set_input_line_and_vector(0, HOLD_LINE, 0xff); // Z80 } m_last_irq_state = state; } WRITE_LINE_MEMBER(timeplt_audio_device::mute_w) { // controls pin 6 (DC audio mute) of LA4460 amplifier machine().sound().system_mute(state); } /************************************* * * Memory maps * *************************************/ void timeplt_audio_device::timeplt_sound_map(address_map &map) { map(0x0000, 0x2fff).rom(); map(0x3000, 0x33ff).mirror(0x0c00).ram(); map(0x4000, 0x4000).mirror(0x0fff).rw("ay1", FUNC(ay8910_device::data_r), FUNC(ay8910_device::data_w)); map(0x5000, 0x5000).mirror(0x0fff).w("ay1", FUNC(ay8910_device::address_w)); map(0x6000, 0x6000).mirror(0x0fff).rw("ay2", FUNC(ay8910_device::data_r), FUNC(ay8910_device::data_w)); map(0x7000, 0x7000).mirror(0x0fff).w("ay2", FUNC(ay8910_device::address_w)); map(0x8000, 0xffff).w(FUNC(timeplt_audio_device::filter_w)); } void locomotn_audio_device::locomotn_sound_map(address_map &map) { map(0x0000, 0x1fff).rom(); map(0x2000, 0x23ff).mirror(0x0c00).ram(); map(0x3000, 0x3fff).w(FUNC(locomotn_audio_device::filter_w)); map(0x4000, 0x4000).mirror(0x0fff).rw("ay1", FUNC(ay8910_device::data_r), FUNC(ay8910_device::data_w)); map(0x5000, 0x5000).mirror(0x0fff).w("ay1", FUNC(ay8910_device::address_w)); map(0x6000, 0x6000).mirror(0x0fff).rw("ay2", FUNC(ay8910_device::data_r), FUNC(ay8910_device::data_w)); map(0x7000, 0x7000).mirror(0x0fff).w("ay2", FUNC(ay8910_device::address_w)); } /************************************* * * Machine drivers * *************************************/ void timeplt_audio_device::device_add_mconfig(machine_config &config) { /* basic machine hardware */ Z80(config, m_soundcpu, DERIVED_CLOCK(1, 8)); m_soundcpu->set_addrmap(AS_PROGRAM, &timeplt_audio_device::timeplt_sound_map); /* sound hardware */ SPEAKER(config, "mono").front_center(); GENERIC_LATCH_8(config, m_soundlatch); ay8910_device &ay1(AY8910(config, "ay1", DERIVED_CLOCK(1, 8))); ay1.port_a_read_callback().set(m_soundlatch, FUNC(generic_latch_8_device::read)); ay1.port_b_read_callback().set(FUNC(timeplt_audio_device::portB_r)); ay1.add_route(0, "filter.0.0", 0.60); ay1.add_route(1, "filter.0.1", 0.60); ay1.add_route(2, "filter.0.2", 0.60); ay8910_device &ay2(AY8910(config, "ay2", DERIVED_CLOCK(1, 8))); ay2.add_route(0, "filter.1.0", 0.60); ay2.add_route(1, "filter.1.1", 0.60); ay2.add_route(2, "filter.1.2", 0.60); for (required_device &filter : m_filter_0) FILTER_RC(config, filter).add_route(ALL_OUTPUTS, "mono", 1.0); for (required_device &filter : m_filter_1) FILTER_RC(config, filter).add_route(ALL_OUTPUTS, "mono", 1.0); } void locomotn_audio_device::device_add_mconfig(machine_config &config) { timeplt_audio_device::device_add_mconfig(config); /* basic machine hardware */ m_soundcpu->set_addrmap(AS_PROGRAM, &locomotn_audio_device::locomotn_sound_map); }