// 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
//-------------------------------------------------
void bally_as2888_device::sound_select(uint8_t data)
{
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
//-------------------------------------------------
void bally_as3022_device::sound_select(uint8_t data)
{
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_rc_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
//-------------------------------------------------
uint8_t 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
//-------------------------------------------------
void bally_as3022_device::pia_porta_w(uint8_t data)
{
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
//-------------------------------------------------
void bally_as3022_device::pia_portb_w(uint8_t data)
{
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)
//-------------------------------------------------
uint8_t 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
//-------------------------------------------------
void bally_sounds_plus_device::vocalizer_pia_portb_w(uint8_t data)
{
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(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
//-------------------------------------------------
void bally_cheap_squeak_device::sound_select(uint8_t data)
{
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
//-------------------------------------------------
void bally_cheap_squeak_device::out_p1_cb(uint8_t data)
{
m_dac->write(data);
}
//-------------------------------------------------
// in_p2_cb - IO port 2 read
//-------------------------------------------------
uint8_t 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
//-------------------------------------------------
void bally_cheap_squeak_device::out_p2_cb(uint8_t data)
{
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
//-------------------------------------------------
void bally_squawk_n_talk_device::sound_select(uint8_t data)
{
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
//-------------------------------------------------
void bally_squawk_n_talk_device::pia1_portb_w(uint8_t data)
{
m_tms5200->rsq_w(BIT(data, 0));
m_tms5200->wsq_w(BIT(data, 1));
}
//-------------------------------------------------
// pia2_porta_r - PIA 2 port A reads
//-------------------------------------------------
uint8_t 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_rc_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
//-------------------------------------------------
uint8_t 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
//-------------------------------------------------
void bally_squawk_n_talk_ay_device::pia2_porta_w(uint8_t data)
{
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
//-------------------------------------------------
void bally_squawk_n_talk_ay_device::pia2_portb_w(uint8_t data)
{
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
//-------------------------------------------------
uint8_t 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);
}
}