// license:BSD-3-Clause // copyright-holders:Mike Harris, Quench /*************************************************************************** bally.cpp Functions to emulate the various Bally pinball sound boards. ***************************************************************************/ #include "emu.h" #include "audio/bally.h" #include "sound/volt_reg.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** DEFINE_DEVICE_TYPE(BALLY_AS2888, bally_as2888_device, "as2888", "Bally AS2888 Sound Board") DEFINE_DEVICE_TYPE(BALLY_AS3022, bally_as3022_device, "as3022", "Bally AS3022 Sound Board") DEFINE_DEVICE_TYPE(BALLY_SOUNDS_PLUS, bally_sounds_plus_device, "sounds_plus", "Bally Sounds Plus w/ Vocalizer Board") DEFINE_DEVICE_TYPE(BALLY_CHEAP_SQUEAK, bally_cheap_squeak_device, "cheap_squeak", "Bally Cheap Squeak Board") DEFINE_DEVICE_TYPE(BALLY_SQUAWK_N_TALK, bally_squawk_n_talk_device, "squawk_n_talk", "Bally Squawk & Talk Board") DEFINE_DEVICE_TYPE(BALLY_SQUAWK_N_TALK_AY, bally_squawk_n_talk_ay_device, "squawk_n_talk_ay", "Bally Squawk & Talk w/ AY8910 Board") //************************************************************************** // AS2888 //************************************************************************** static const discrete_mixer_desc as2888_digital_mixer_info = { DISC_MIXER_IS_RESISTOR, /* type */ {RES_K(33), RES_K(3.9)}, /* r{} */ {0, 0, 0, 0}, /* r_node */ {0, 0}, /* c{} */ 0, /* rI */ // RES_VOLTAGE_DIVIDER(RES_K(10), RES_R(360)), /* rF */ RES_K(10), /* rF */ // not really CAP_U(0.01), /* cF */ 0, /* cAmp */ 0, /* vRef */ 0.00002 /* gain */ }; static const discrete_op_amp_filt_info as2888_preamp_info = { RES_K(10), 0, RES_R(470), 0, /* r1 .. r4 */ RES_K(10), /* rF */ CAP_U(1), /* C1 */ 0, /* C2 */ 0, /* C3 */ 0.0, /* vRef */ 12.0, /* vP */ -12.0, /* vN */ }; static DISCRETE_SOUND_START(as2888_discrete) DISCRETE_INPUT_DATA(NODE_08) // Start Sustain Attenuation from 555 circuit DISCRETE_INPUT_LOGIC(NODE_01) // Binary Counter B output (divide by 1) T2 DISCRETE_INPUT_LOGIC(NODE_04) // Binary Counter D output (divide by 4) T3 DISCRETE_DIVIDE(NODE_11, 1, NODE_01, 1) // 2 DISCRETE_DIVIDE(NODE_14, 1, NODE_04, 1) DISCRETE_RCFILTER(NODE_06, NODE_14, RES_K(15), CAP_U(0.1)) // T4 filter #if 0 DISCRETE_RCFILTER(NODE_05, NODE_11, RES_K(33), CAP_U(0.01)) // T1 filter DISCRETE_ADDER2(NODE_07, 1, NODE_05, NODE_06) #else DISCRETE_MIXER2(NODE_07, 1, NODE_11, NODE_06, &as2888_digital_mixer_info) // Mix and filter T1 and T4 together #endif DISCRETE_RCDISC5(NODE_87, 1, NODE_08, RES_K(150), CAP_U(1.0)) DISCRETE_RCFILTER_VREF(NODE_88,NODE_87,RES_M(1),CAP_U(0.01),2) DISCRETE_MULTIPLY(NODE_09, NODE_07, NODE_88) // Apply sustain DISCRETE_OP_AMP_FILTER(NODE_20, 1, NODE_09, 0, DISC_OP_AMP_FILTER_IS_HIGH_PASS_1, &as2888_preamp_info) DISCRETE_CRFILTER(NODE_25, NODE_20, RES_M(100), CAP_U(0.05)) // Resistor is fake. Capacitor in series between pre-amp and output amp. DISCRETE_GAIN(NODE_30, NODE_25, 50) // Output amplifier LM380 fixed inbuilt gain of 50 DISCRETE_OUTPUT(NODE_30, 10000000) // 17000000 DISCRETE_SOUND_END //------------------------------------------------- // sound_select - handle an external write to the board //------------------------------------------------- WRITE8_MEMBER(bally_as2888_device::sound_select) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_as2888_device::sound_select_sync), this), data); } TIMER_CALLBACK_MEMBER(bally_as2888_device::sound_select_sync) { m_sound_select = param ^ 0x10; } //------------------------------------------------- // sound_int - handle an external sound interrupt to the board //------------------------------------------------- WRITE_LINE_MEMBER(bally_as2888_device::sound_int) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_as2888_device::sound_int_sync), this), state); } TIMER_CALLBACK_MEMBER(bally_as2888_device::sound_int_sync) { if (param) { m_snd_sustain_timer->adjust(attotime::from_msec(5)); m_discrete->write(NODE_08, 11); // 11 volt pulse } } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_as2888_device::device_add_mconfig(machine_config &config) { DISCRETE(config, m_discrete, as2888_discrete); m_discrete->add_route(ALL_OUTPUTS, *this, 1.00, AUTO_ALLOC_INPUT, 0); TIMER(config, "timer_s_freq").configure_periodic(FUNC(bally_as2888_device::timer_s), attotime::from_hz(353000)); // Inverter clock on AS-2888 sound board TIMER(config, m_snd_sustain_timer).configure_generic(FUNC(bally_as2888_device::timer_as2888)); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bally_as2888_device::device_start() { save_item(NAME(m_sound_select)); save_item(NAME(m_snd_sel)); save_item(NAME(m_snd_tone_gen)); save_item(NAME(m_snd_div)); } TIMER_DEVICE_CALLBACK_MEMBER(bally_as2888_device::timer_s) { m_snd_tone_gen--; if ((m_snd_tone_gen == 0) && (m_snd_sel != 0x01)) { m_snd_tone_gen = m_snd_sel; m_snd_div++; m_discrete->write(NODE_04, BIT(m_snd_div, 2) * 1); m_discrete->write(NODE_01, BIT(m_snd_div, 0) * 1); } } TIMER_DEVICE_CALLBACK_MEMBER(bally_as2888_device::timer_as2888) { m_snd_sel = m_snd_prom[m_sound_select]; m_snd_sel = bitswap<8>(m_snd_sel,0,1,2,3,4,5,6,7); m_snd_tone_gen = m_snd_sel; m_discrete->write(NODE_08, 0); m_snd_sustain_timer->adjust(attotime::never); } //************************************************************************** // AS3022 //************************************************************************** //-------------------------------------------------------------------------- // IO ports //-------------------------------------------------------------------------- static INPUT_PORTS_START(as3022) PORT_START("SW1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE3 ) PORT_NAME("Sound Test") PORT_CHANGED_MEMBER(DEVICE_SELF, bally_as3022_device, sw1, 0) INPUT_PORTS_END ioport_constructor bally_as3022_device::device_input_ports() const { return INPUT_PORTS_NAME(as3022); } INPUT_CHANGED_MEMBER(bally_as3022_device::sw1) { if (newval != oldval) m_cpu->set_input_line(INPUT_LINE_NMI, (newval ? ASSERT_LINE : CLEAR_LINE)); } //------------------------------------------------- // sound_select - handle an external write to the board //------------------------------------------------- WRITE8_MEMBER(bally_as3022_device::sound_select) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_as3022_device::sound_select_sync), this), data); } TIMER_CALLBACK_MEMBER(bally_as3022_device::sound_select_sync) { m_sound_select = param; } //------------------------------------------------- // sound_int - handle an external sound interrupt to the board //------------------------------------------------- WRITE_LINE_MEMBER(bally_as3022_device::sound_int) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_as3022_device::sound_int_sync), this), state); } TIMER_CALLBACK_MEMBER(bally_as3022_device::sound_int_sync) { m_pia->ca1_w(param); } //------------------------------------------------- // pia_irq_w - IRQ line state changes //------------------------------------------------- WRITE_LINE_MEMBER(bally_as3022_device::pia_irq_w) { int combined_state = m_pia->irq_a_state() | m_pia->irq_b_state(); m_cpu->set_input_line(M6802_IRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE); } //------------------------------------------------- // CPU map, from schematics //------------------------------------------------- void bally_as3022_device::as3022_map(address_map &map) { map.unmap_value_high(); map.global_mask(0x1fff); // A13-15 are unconnected map(0x0000, 0x007f).mirror(0x0f00).ram(); map(0x0080, 0x0083).mirror(0x0f7c).rw("pia", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x1000, 0x1fff).rom(); // 4k RAM space, but could be jumpered for 2k } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_as3022_device::device_add_mconfig(machine_config &config) { M6808(config, m_cpu, DERIVED_CLOCK(1, 1)); m_cpu->set_addrmap(AS_PROGRAM, &bally_as3022_device::as3022_map); PIA6821(config, m_pia, 0); m_pia->readpa_handler().set(FUNC(bally_as3022_device::pia_porta_r)); m_pia->writepa_handler().set(FUNC(bally_as3022_device::pia_porta_w)); m_pia->writepb_handler().set(FUNC(bally_as3022_device::pia_portb_w)); m_pia->cb2_handler().set(FUNC(bally_as3022_device::pia_cb2_w)); m_pia->irqa_handler().set(FUNC(bally_as3022_device::pia_irq_w)); m_pia->irqb_handler().set(FUNC(bally_as3022_device::pia_irq_w)); for (required_device &filter : m_ay_filters) // TODO: Calculate exact filter values. An AC filter is good enough for now // and required as the chip likes to output a DC offset at idle. FILTER_RC(config, filter).set_ac().add_route(ALL_OUTPUTS, *this, 1.0); AY8910(config, m_ay, DERIVED_CLOCK(1, 4)); m_ay->add_route(0, "ay_filter0", 0.33); m_ay->add_route(1, "ay_filter1", 0.33); m_ay->add_route(2, "ay_filter2", 0.33); m_ay->port_a_read_callback().set(FUNC(bally_as3022_device::ay_io_r)); m_ay->add_route(ALL_OUTPUTS, *this, 0.33, AUTO_ALLOC_INPUT, 0); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bally_as3022_device::device_start() { // Set volumes to a sane default. m_ay->set_volume(0, 0); m_ay->set_volume(1, 0); m_ay->set_volume(2, 0); save_item(NAME(m_bc1)); save_item(NAME(m_bdir)); save_item(NAME(m_sound_select)); save_item(NAME(m_ay_data)); } //------------------------------------------------- // pia_porta_r - PIA port A reads //------------------------------------------------- READ8_MEMBER(bally_as3022_device::pia_porta_r) { if (m_bc1 && !m_bdir) { m_ay_data = m_ay->data_r(); return m_ay_data; } else { // Nothing is active on the bus, so return open bus. return 0xff; } } //------------------------------------------------- // pia_porta_w - PIA port A writes //------------------------------------------------- WRITE8_MEMBER(bally_as3022_device::pia_porta_w) { if (m_bc1 && !m_bdir) { logerror("PIA port A bus contention!\n"); } m_ay_data = data; update_ay_bus(); } //------------------------------------------------- // pia_portb_w - PIA port B writes //------------------------------------------------- WRITE8_MEMBER(bally_as3022_device::pia_portb_w) { m_bc1 = BIT(data, 0); m_bdir = BIT(data, 1); if (m_bc1 && !m_bdir) { m_ay_data = m_ay->data_r(); } update_ay_bus(); } //------------------------------------------------- // pia_cb2_w - PIA CB2 writes //------------------------------------------------- WRITE_LINE_MEMBER(bally_as3022_device::pia_cb2_w) { // This pin is hooked up to the amp, and disables sounds when hi if (state) { m_ay->set_volume(0, 0); m_ay->set_volume(1, 0); m_ay->set_volume(2, 0); } else { m_ay->set_volume(0, 0xff); m_ay->set_volume(1, 0xff); m_ay->set_volume(2, 0xff); } } //------------------------------------------------- // ay_io_r - AY8912 IO A reads (B is unconnected) //------------------------------------------------- READ8_MEMBER(bally_as3022_device::ay_io_r) { // The two high bits are unconnected, the others are inverted. return ~m_sound_select & 0x3f; } void bally_as3022_device::update_ay_bus() { if (m_bc1 && m_bdir) { m_ay->address_w(m_ay_data); } else if (!m_bc1 && m_bdir) { m_ay->data_w(m_ay_data); } } //************************************************************************** // SOUNDS PLUS WITH VOCALIZER //************************************************************************** //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_sounds_plus_device::device_add_mconfig(machine_config &config) { bally_as3022_device::device_add_mconfig(config); m_cpu->set_addrmap(AS_PROGRAM, &bally_sounds_plus_device::sounds_plus_map); m_pia->writepb_handler().set(FUNC(bally_sounds_plus_device::vocalizer_pia_portb_w)); // TODO: Calculate exact filter values. An AC filter is good enough for now // and required as the chip likes to output a DC offset at idle. FILTER_RC(config, m_mc3417_filter).set_ac(); m_mc3417_filter->add_route(ALL_OUTPUTS, *this, 1.0); MC3417(config, m_mc3417, 0); // A gain of 2.2 is a guess. It sounds about loud enough and doesn't clip. m_mc3417->add_route(ALL_OUTPUTS, "mc3417_filter", 2.2); } //------------------------------------------------- // CPU map, from schematics //------------------------------------------------- void bally_sounds_plus_device::sounds_plus_map(address_map &map) { map.unmap_value_high(); map(0x0000, 0x007f).mirror(0x7f00).ram(); map(0x0080, 0x0083).mirror(0x7f7c).rw("pia", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x8000, 0xffff).rom(); } //------------------------------------------------- // pia_portb_w - PIA port B writes //------------------------------------------------- WRITE8_MEMBER(bally_sounds_plus_device::vocalizer_pia_portb_w) { bool speech_clock = BIT(data, 6); bool speech_data = BIT(data, 7); m_mc3417->clock_w(speech_clock ? 1 : 0); m_mc3417->digit_w(speech_data ? 1 : 0); pia_portb_w(space, offset, data); } //************************************************************************** // Cheap Squeak //************************************************************************** //-------------------------------------------------------------------------- // IO ports //-------------------------------------------------------------------------- static INPUT_PORTS_START(cheap_squeak) PORT_START("SW1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE3 ) PORT_NAME("Sound Test") PORT_CHANGED_MEMBER(DEVICE_SELF, bally_cheap_squeak_device, sw1, 0) INPUT_PORTS_END ioport_constructor bally_cheap_squeak_device::device_input_ports() const { return INPUT_PORTS_NAME(cheap_squeak); } INPUT_CHANGED_MEMBER(bally_cheap_squeak_device::sw1) { if (newval != oldval) m_cpu->set_input_line(INPUT_LINE_NMI, (newval ? ASSERT_LINE : CLEAR_LINE)); } //------------------------------------------------- // sound_select - handle an external write to the board //------------------------------------------------- WRITE8_MEMBER(bally_cheap_squeak_device::sound_select) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_cheap_squeak_device::sound_select_sync), this), data); } TIMER_CALLBACK_MEMBER(bally_cheap_squeak_device::sound_select_sync) { m_sound_select = param; } //------------------------------------------------- // sound_int - handle an external sound interrupt to the board //------------------------------------------------- WRITE_LINE_MEMBER(bally_cheap_squeak_device::sound_int) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_cheap_squeak_device::sound_int_sync), this), state); } TIMER_CALLBACK_MEMBER(bally_cheap_squeak_device::sound_int_sync) { m_sound_int = param; m_cpu->set_input_line(M6801_TIN_LINE, (m_sound_int ? ASSERT_LINE : CLEAR_LINE)); update_led(); } //------------------------------------------------- // CPU map, from schematics //------------------------------------------------- void bally_cheap_squeak_device::cheap_squeak_map(address_map &map) { map.unmap_value_high(); map(0x0080, 0x00ff).ram(); map(0x8000, 0x9fff).mirror(0x2000).rom(); map(0xc000, 0xdfff).mirror(0x2000).rom(); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_cheap_squeak_device::device_add_mconfig(machine_config &config) { M6803(config, m_cpu, DERIVED_CLOCK(1, 1)); m_cpu->set_addrmap(AS_PROGRAM, &bally_cheap_squeak_device::cheap_squeak_map); m_cpu->out_p1_cb().set(FUNC(bally_cheap_squeak_device::out_p1_cb)); m_cpu->in_p2_cb().set(FUNC(bally_cheap_squeak_device::in_p2_cb)); m_cpu->out_p2_cb().set(FUNC(bally_cheap_squeak_device::out_p2_cb)); ZN429E(config, "dac", 0).add_route(ALL_OUTPUTS, *this, 1.00, AUTO_ALLOC_INPUT, 0); voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref")); vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac", -1.0, DAC_VREF_NEG_INPUT); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bally_cheap_squeak_device::device_start() { m_sound_ack_w_handler.resolve(); save_item(NAME(m_sound_select)); save_item(NAME(m_sound_int)); } //------------------------------------------------- // out_p1_cb - IO port 1 write //------------------------------------------------- WRITE8_MEMBER(bally_cheap_squeak_device::out_p1_cb) { m_dac->write(data); } //------------------------------------------------- // in_p2_cb - IO port 2 read //------------------------------------------------- READ8_MEMBER(bally_cheap_squeak_device::in_p2_cb) { int sound_int_bit = m_sound_int ? 1 : 0; return 0x40 | (m_sound_select & 0x0f) << 1 | sound_int_bit; } //------------------------------------------------- // out_p2_cb - IO port 2 write //------------------------------------------------- WRITE8_MEMBER(bally_cheap_squeak_device::out_p2_cb) { m_sound_ack = BIT(data, 0); if (!m_sound_ack_w_handler.isnull()) { m_sound_ack_w_handler(m_sound_ack); } update_led(); } void bally_cheap_squeak_device::update_led() { // Either input or output can pull the led line high bool led_state = m_sound_int || m_sound_ack; machine().output().set_value("sound_led0", led_state); } //************************************************************************** // Squawk & Talk //************************************************************************** //-------------------------------------------------------------------------- // IO ports //-------------------------------------------------------------------------- static INPUT_PORTS_START(squawk_n_talk) PORT_START("SW1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE3 ) PORT_NAME("SW1") PORT_CHANGED_MEMBER(DEVICE_SELF, bally_squawk_n_talk_device, sw1, 0) INPUT_PORTS_END ioport_constructor bally_squawk_n_talk_device::device_input_ports() const { return INPUT_PORTS_NAME(squawk_n_talk); } INPUT_CHANGED_MEMBER(bally_squawk_n_talk_device::sw1) { if (newval != oldval) m_cpu->set_input_line(INPUT_LINE_NMI, (newval ? ASSERT_LINE : CLEAR_LINE)); } //------------------------------------------------- // sound_select - handle an external write to the board //------------------------------------------------- WRITE8_MEMBER(bally_squawk_n_talk_device::sound_select) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_squawk_n_talk_device::sound_select_sync), this), data); } TIMER_CALLBACK_MEMBER(bally_squawk_n_talk_device::sound_select_sync) { m_sound_select = param; } //------------------------------------------------- // sound_int - handle an external sound interrupt to the board //------------------------------------------------- WRITE_LINE_MEMBER(bally_squawk_n_talk_device::sound_int) { machine().scheduler().synchronize(timer_expired_delegate(FUNC(bally_squawk_n_talk_device::sound_int_sync), this), state); } TIMER_CALLBACK_MEMBER(bally_squawk_n_talk_device::sound_int_sync) { // the line runs though in inverter m_pia2->cb1_w(!param); } //------------------------------------------------- // CPU map, from schematics //------------------------------------------------- void bally_squawk_n_talk_device::squawk_n_talk_map(address_map &map) { map.unmap_value_high(); map(0x0080, 0x0083).mirror(0x4f6c).rw("pia2", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x0090, 0x0093).mirror(0x4f6c).rw("pia1", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x1000, 0x1000).mirror(0x40ff).w("dac", FUNC(dac_byte_interface::data_w)); map(0x8000, 0x8fff).mirror(0x4000).rom(); // U2 map(0x9000, 0x9fff).mirror(0x4000).rom(); // U3 map(0xa000, 0xafff).mirror(0x4000).rom(); // U4 map(0xb000, 0xbfff).mirror(0x4000).rom(); // U5 } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_squawk_n_talk_device::device_add_mconfig(machine_config &config) { M6802(config, m_cpu, DERIVED_CLOCK(1, 1)); // could also be jumpered to use a 6808 m_cpu->set_addrmap(AS_PROGRAM, &bally_squawk_n_talk_device::squawk_n_talk_map); PIA6821(config, m_pia1, 0); m_pia1->readpa_handler().set(m_tms5200, FUNC(tms5220_device::status_r)); m_pia1->writepa_handler().set(m_tms5200, FUNC(tms5220_device::data_w)); m_pia1->writepb_handler().set(FUNC(bally_squawk_n_talk_device::pia1_portb_w)); m_pia1->irqa_handler().set(FUNC(bally_squawk_n_talk_device::pia_irq_w)); m_pia1->irqb_handler().set(FUNC(bally_squawk_n_talk_device::pia_irq_w)); PIA6821(config, m_pia2, 0); m_pia2->readpa_handler().set(FUNC(bally_squawk_n_talk_device::pia2_porta_r)); m_pia2->ca2_handler().set(FUNC(bally_squawk_n_talk_device::pia2_ca2_w)); m_pia2->irqa_handler().set(FUNC(bally_squawk_n_talk_device::pia_irq_w)); m_pia2->irqb_handler().set(FUNC(bally_squawk_n_talk_device::pia_irq_w)); FILTER_RC(config, m_dac_filter); m_dac_filter->add_route(ALL_OUTPUTS, *this, 1.0); m_dac_filter->set_rc(filter_rc_device::HIGHPASS, 2000, 0, 0, CAP_U(2)); AD558(config, "dac", 0).add_route(ALL_OUTPUTS, "dac_filter", 0.75); voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref")); vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac", -1.0, DAC_VREF_NEG_INPUT); // TODO: Calculate exact filter values. An AC filter is good enough for now // and required as the chip likes to output a DC offset at idle. FILTER_RC(config, m_speech_filter).set_ac(); m_speech_filter->add_route(ALL_OUTPUTS, *this, 1.0); TMS5200(config, m_tms5200, 640000); m_tms5200->add_route(ALL_OUTPUTS, "speech_filter", 1.0); m_tms5200->ready_cb().set(m_pia1, FUNC(pia6821_device::ca2_w)); m_tms5200->irq_cb().set(m_pia1, FUNC(pia6821_device::cb1_w)); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bally_squawk_n_talk_device::device_start() { save_item(NAME(m_sound_select)); } //------------------------------------------------- // pia1_portb_w - PIA 1 port B write //------------------------------------------------- WRITE8_MEMBER(bally_squawk_n_talk_device::pia1_portb_w) { m_tms5200->rsq_w(BIT(data, 0)); m_tms5200->wsq_w(BIT(data, 1)); } //------------------------------------------------- // pia2_porta_r - PIA 2 port A reads //------------------------------------------------- READ8_MEMBER(bally_squawk_n_talk_device::pia2_porta_r) { // 5 lines and they go through inverters return ~m_sound_select & 0x1f; } //------------------------------------------------- // pia2_ca2_w - PIA 2 CA2 writes //------------------------------------------------- WRITE_LINE_MEMBER(bally_squawk_n_talk_device::pia2_ca2_w) { machine().output().set_value("sound_led0", state); } //------------------------------------------------- // pia_irq_w - IRQ line state changes //------------------------------------------------- WRITE_LINE_MEMBER(bally_squawk_n_talk_device::pia_irq_w) { int combined_state = m_pia1->irq_a_state() | m_pia1->irq_b_state() | m_pia2->irq_a_state() | m_pia2->irq_b_state(); m_cpu->set_input_line(M6802_IRQ_LINE, combined_state ? ASSERT_LINE : CLEAR_LINE); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bally_squawk_n_talk_ay_device::device_add_mconfig(machine_config &config) { bally_squawk_n_talk_device::device_add_mconfig(config); m_pia2->writepa_handler().set(FUNC(bally_squawk_n_talk_ay_device::pia2_porta_w)); m_pia2->readpa_handler().set(FUNC(bally_squawk_n_talk_ay_device::pia2_porta_r)); m_pia2->writepb_handler().set(FUNC(bally_squawk_n_talk_ay_device::pia2_portb_w)); m_pia2->cb2_handler().set(FUNC(bally_squawk_n_talk_ay_device::pia2_cb2_w)); for (optional_device &filter : m_ay_filters) // TODO: Calculate exact filter values. An AC filter is good enough for now // and required as the chip likes to output a DC offset at idle. FILTER_RC(config, filter).set_ac().add_route(ALL_OUTPUTS, *this, 1.0); AY8910(config, m_ay, DERIVED_CLOCK(1, 4)); m_ay->add_route(0, "ay_filter0", 0.33); m_ay->add_route(1, "ay_filter1", 0.33); m_ay->add_route(2, "ay_filter2", 0.33); m_ay->port_a_read_callback().set(FUNC(bally_squawk_n_talk_ay_device::ay_io_r)); } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bally_squawk_n_talk_ay_device::device_start() { // Set volumes to a sane default. m_ay->set_volume(0, 0); m_ay->set_volume(1, 0); m_ay->set_volume(2, 0); save_item(NAME(m_bc1)); save_item(NAME(m_bdir)); save_item(NAME(m_ay_data)); } //------------------------------------------------- // pia2_porta_r - PIA 2 port A reads //------------------------------------------------- READ8_MEMBER(bally_squawk_n_talk_ay_device::pia2_porta_r) { if (m_bc1 && !m_bdir) { m_ay_data = m_ay->data_r(); } // This should return the open bus, but this method is called even if the PIA // is in output mode. Self test expects to see the same value. return m_ay_data; } //------------------------------------------------- // pia2_porta_w - PIA 2 port A writes //------------------------------------------------- WRITE8_MEMBER(bally_squawk_n_talk_ay_device::pia2_porta_w) { if (m_bc1 && !m_bdir) { logerror("PIA2 port A bus contention!\n"); } m_ay_data = data; update_ay_bus(); } //------------------------------------------------- // pia2_portb_w - PIA 2 port B writes //------------------------------------------------- WRITE8_MEMBER(bally_squawk_n_talk_ay_device::pia2_portb_w) { m_bc1 = BIT(data, 0); m_bdir = BIT(data, 1); if (m_bc1 && !m_bdir) { m_ay_data = m_ay->data_r(); } update_ay_bus(); } //------------------------------------------------- // pia2_cb2_w - PIA 2 CB2 writes //------------------------------------------------- WRITE_LINE_MEMBER(bally_squawk_n_talk_ay_device::pia2_cb2_w) { // This pin is hooked up to the amp, and disables sounds when hi if (state) { m_ay->set_volume(0, 0); m_ay->set_volume(1, 0); m_ay->set_volume(2, 0); } else { m_ay->set_volume(0, 0xff); m_ay->set_volume(1, 0xff); m_ay->set_volume(2, 0xff); } } //------------------------------------------------- // ay_io_r - AY8910 read //------------------------------------------------- READ8_MEMBER(bally_squawk_n_talk_ay_device::ay_io_r) { // 5 lines and they go through inverters return ~m_sound_select & 0x1f; } void bally_squawk_n_talk_ay_device::update_ay_bus() { if (m_bc1 && m_bdir) { m_ay->address_w(m_ay_data); } else if (!m_bc1 && m_bdir) { m_ay->data_w(m_ay_data); } }