// license:BSD-3-Clause // copyright-holders:Mike Balfour /*************************************************************************** Irem Red Alert hardware If you have any questions about how this driver works, don't hesitate to ask. - Mike Balfour (mab22@po.cwru.edu) ****************************************************************************/ #include "emu.h" #include "includes/redalert.h" #include "cpu/m6800/m6800.h" #include "cpu/m6502/m6502.h" #include "machine/rescap.h" #include "machine/6821pia.h" #include "speaker.h" #define REDALERT_AUDIO_PCB_CLOCK (XTAL(12'500'000)) #define REDALERT_AUDIO_CPU_CLOCK (REDALERT_AUDIO_PCB_CLOCK / 12) #define REDALERT_AY8910_CLOCK (REDALERT_AUDIO_PCB_CLOCK / 6) #define REDALERT_AUDIO_CPU_IRQ_FREQ (1000000000.0 / PERIOD_OF_555_ASTABLE_NSEC(RES_K(120), RES_K(2.7), CAP_U(0.01))) #define REDALERT_VOICE_PCB_CLOCK (XTAL(6'000'000)) #define REDALERT_VOICE_CPU_CLOCK (REDALERT_VOICE_PCB_CLOCK) #define REDALERT_HC55516_CLOCK (REDALERT_VOICE_PCB_CLOCK / 256) #define DEMONEYE_AUDIO_PCB_CLOCK (XTAL(3'579'545)) #define DEMONEYE_AUDIO_CPU_CLOCK (DEMONEYE_AUDIO_PCB_CLOCK / 4) /* what's the real divisor? */ #define DEMONEYE_AY8910_CLOCK (DEMONEYE_AUDIO_PCB_CLOCK / 2) /* what's the real divisor? */ /************************************* * * Read Alert analog sounds * *************************************/ WRITE8_MEMBER(redalert_state::redalert_analog_w) { /* this port triggers analog sounds D0 = Formation Aircraft? D1 = Dive bombers? D2 = Helicopters? D3 = Launcher firing? D4 = Explosion #1? D5 = Explosion #2? D6 = Explosion #3? */ logerror("Analog: %02X\n",data); } /************************************* * * Red Alert audio board * *************************************/ WRITE8_MEMBER(redalert_state::redalert_audio_command_w) { /* the byte is connected to port A of the AY8910 */ m_soundlatch->write(data); /* D7 is also connected to the NMI input of the CPU - the NMI is actually toggled by a 74121 (R1=27K, C10=330p) */ if ((data & 0x80) == 0x00) m_audiocpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero); } WRITE8_MEMBER(redalert_state::redalert_AY8910_w) { /* BC2 is connected to a pull-up resistor, so BC2=1 always */ switch (data & 0x03) { /* BC1=0, BDIR=0 : inactive */ case 0x00: break; /* BC1=1, BDIR=0 : read from PSG */ case 0x01: m_ay8910_latch_1 = m_ay8910->data_r(); break; /* BC1=0, BDIR=1 : write to PSG */ /* BC1=1, BDIR=1 : latch address */ case 0x02: case 0x03: default: m_ay8910->data_address_w(data, m_ay8910_latch_2); break; } } READ8_MEMBER(redalert_state::redalert_ay8910_latch_1_r) { return m_ay8910_latch_1; } WRITE8_MEMBER(redalert_state::redalert_ay8910_latch_2_w) { m_ay8910_latch_2 = data; } void redalert_state::redalert_audio_map(address_map &map) { map.global_mask(0x7fff); map(0x0000, 0x03ff).mirror(0x0c00).ram(); map(0x1000, 0x1000).mirror(0x0ffe).nopr().w(FUNC(redalert_state::redalert_AY8910_w)); map(0x1001, 0x1001).mirror(0x0ffe).rw(FUNC(redalert_state::redalert_ay8910_latch_1_r), FUNC(redalert_state::redalert_ay8910_latch_2_w)); map(0x2000, 0x6fff).noprw(); map(0x7000, 0x77ff).mirror(0x0800).rom(); } /************************************* * * Red Alert audio board * *************************************/ void redalert_state::sound_start() { save_item(NAME(m_ay8910_latch_1)); save_item(NAME(m_ay8910_latch_2)); } /************************************* * * Red Alert voice board * *************************************/ WRITE8_MEMBER(redalert_state::redalert_voice_command_w) { m_soundlatch2->write((data & 0x78) >> 3); m_voicecpu->set_input_line(I8085_RST75_LINE, (~data & 0x80) ? ASSERT_LINE : CLEAR_LINE); } WRITE_LINE_MEMBER(redalert_state::sod_callback) { m_cvsd->digit_w(state); } READ_LINE_MEMBER(redalert_state::sid_callback) { return m_cvsd->clock_state_r(); } void redalert_state::redalert_voice_map(address_map &map) { map(0x0000, 0x3fff).rom(); map(0x4000, 0x7fff).noprw(); map(0x8000, 0x83ff).mirror(0x3c00).ram(); map(0xc000, 0xc000).mirror(0x3fff).r(m_soundlatch2, FUNC(generic_latch_8_device::read)).nopw(); } /************************************* * * Red Alert audio board (m37b) * *************************************/ void redalert_state::redalert_audio_m37b(machine_config &config) { M6502(config, m_audiocpu, REDALERT_AUDIO_CPU_CLOCK); m_audiocpu->set_addrmap(AS_PROGRAM, &redalert_state::redalert_audio_map); m_audiocpu->set_periodic_int(FUNC(redalert_state::irq0_line_hold), attotime::from_hz(REDALERT_AUDIO_CPU_IRQ_FREQ)); GENERIC_LATCH_8(config, m_soundlatch); AY8910(config, m_ay8910, REDALERT_AY8910_CLOCK); m_ay8910->port_a_read_callback().set(m_soundlatch, FUNC(generic_latch_8_device::read)); m_ay8910->port_b_write_callback().set(FUNC(redalert_state::redalert_analog_w)); m_ay8910->add_route(0, "mono", 0.50); m_ay8910->add_route(1, "mono", 0.50); /* channel C is used a noise source and is not connected to a speaker */ } /************************************* * * Red Alert voice board (ue17b) * *************************************/ void redalert_state::redalert_audio_voice(machine_config &config) { I8085A(config, m_voicecpu, REDALERT_VOICE_CPU_CLOCK); m_voicecpu->set_addrmap(AS_PROGRAM, &redalert_state::redalert_voice_map); m_voicecpu->in_sid_func().set(FUNC(redalert_state::sid_callback)); m_voicecpu->out_sod_func().set(FUNC(redalert_state::sod_callback)); GENERIC_LATCH_8(config, m_soundlatch2); HC55516(config, m_cvsd, REDALERT_HC55516_CLOCK).add_route(ALL_OUTPUTS, "mono", 0.50); } /************************************* * * Red Alert * *************************************/ void redalert_state::redalert_audio(machine_config &config) { SPEAKER(config, "mono").front_center(); redalert_audio_m37b(config); redalert_audio_voice(config); } /************************************* * * Red Alert * *************************************/ void redalert_state::ww3_audio(machine_config &config) { SPEAKER(config, "mono").front_center(); redalert_audio_m37b(config); } /************************************* * * Demoneye-X audio board * *************************************/ WRITE8_MEMBER(redalert_state::demoneye_audio_command_w) { /* the byte is connected to port A of the AY8910 */ m_soundlatch->write(data); m_audiocpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero); } WRITE8_MEMBER(redalert_state::demoneye_ay8910_latch_1_w) { m_ay8910_latch_1 = data; } READ8_MEMBER(redalert_state::demoneye_ay8910_latch_2_r) { return m_ay8910_latch_2; } WRITE8_MEMBER(redalert_state::demoneye_ay8910_data_w) { switch (m_ay8910_latch_1 & 0x03) { case 0x00: if (m_ay8910_latch_1 & 0x10) m_ay[0]->data_w(data); if (m_ay8910_latch_1 & 0x20) m_ay[1]->data_w(data); break; case 0x01: if (m_ay8910_latch_1 & 0x10) m_ay8910_latch_2 = m_ay[0]->data_r(); if (m_ay8910_latch_1 & 0x20) m_ay8910_latch_2 = m_ay[1]->data_r(); break; case 0x03: if (m_ay8910_latch_1 & 0x10) m_ay[0]->address_w(data); if (m_ay8910_latch_1 & 0x20) m_ay[1]->address_w(data); break; default: logerror("demoneye_ay8910_data_w called with latch %02X data %02X\n", m_ay8910_latch_1, data); break; } } void redalert_state::demoneye_audio_map(address_map &map) { map(0x0500, 0x0503).mirror(0xc000).rw("sndpia", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x2000, 0x3fff).mirror(0xc000).rom(); } /************************************* * * Demoneye-X machine driver * *************************************/ void redalert_state::demoneye_audio(machine_config &config) { M6802(config, m_audiocpu, DEMONEYE_AUDIO_CPU_CLOCK); m_audiocpu->set_addrmap(AS_PROGRAM, &redalert_state::demoneye_audio_map); m_audiocpu->set_periodic_int(FUNC(redalert_state::irq0_line_hold), attotime::from_hz(REDALERT_AUDIO_CPU_IRQ_FREQ)); /* guess */ pia6821_device &sndpia(PIA6821(config, "sndpia", 0)); sndpia.readpa_handler().set(FUNC(redalert_state::demoneye_ay8910_latch_2_r)); sndpia.writepa_handler().set(FUNC(redalert_state::demoneye_ay8910_data_w)); sndpia.writepb_handler().set(FUNC(redalert_state::demoneye_ay8910_latch_1_w)); SPEAKER(config, "mono").front_center(); GENERIC_LATCH_8(config, m_soundlatch); AY8910(config, m_ay[0], DEMONEYE_AY8910_CLOCK); m_ay[0]->add_route(ALL_OUTPUTS, "mono", 0.50); AY8910(config, m_ay[1], DEMONEYE_AY8910_CLOCK); m_ay[1]->port_a_read_callback().set(m_soundlatch, FUNC(generic_latch_8_device::read)); m_ay[1]->add_route(ALL_OUTPUTS, "mono", 0.50); }