// license:BSD-3-Clause // copyright-holders:Barry Rodewald /* * s11c_bg.c - Williams System 11C background music (M68B09E + YM2151 + HC55516 + DAC) * * Created on: 2/10/2013 * Author: bsr */ #include "emu.h" #include "s11c_bg.h" #include "sound/dac.h" #include "sound/volt_reg.h" DEFINE_DEVICE_TYPE(S11C_BG, s11c_bg_device, "s11c_bg", "Williams System 11C Background Music") s11c_bg_device::s11c_bg_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, S11C_BG,tag,owner,clock) , device_mixer_interface(mconfig, *this) , m_cpu(*this, "bgcpu") , m_ym2151(*this, "ym2151") , m_hc55516(*this, "hc55516_bg") , m_pia40(*this, "pia40") , m_cpubank(*this, "bgbank") , m_rom(*this, finder_base::DUMMY_TAG) { } void s11c_bg_device::s11c_bg_map(address_map &map) { map(0x0000, 0x07ff).ram(); map(0x2000, 0x2001).mirror(0x1ffe).rw(m_ym2151, FUNC(ym2151_device::read), FUNC(ym2151_device::write)); map(0x4000, 0x4003).mirror(0x1ffc).rw("pia40", FUNC(pia6821_device::read), FUNC(pia6821_device::write)); map(0x6000, 0x67ff).w(FUNC(s11c_bg_device::bg_speech_digit_w)); map(0x6800, 0x6fff).w(FUNC(s11c_bg_device::bg_speech_clock_w)); map(0x7800, 0x7fff).w(FUNC(s11c_bg_device::bgbank_w)); map(0x8000, 0xffff).bankr("bgbank"); } WRITE_LINE_MEMBER( s11c_bg_device::pia40_cb2_w) { // m_pia34->cb1_w(state); // To Widget MCB1 through CPU Data interface } WRITE8_MEMBER( s11c_bg_device::pia40_pb_w ) { // m_pia34->write_portb(data); } void s11c_bg_device::ctrl_w(uint8_t data) { m_pia40->cb1_w(data); } void s11c_bg_device::data_w(uint8_t data) { m_pia40->write_portb(data); } void s11c_bg_device::device_add_mconfig(machine_config &config) { MC6809E(config, m_cpu, XTAL(8'000'000) / 4); // MC68B09E m_cpu->set_addrmap(AS_PROGRAM, &s11c_bg_device::s11c_bg_map); config.set_maximum_quantum(attotime::from_hz(50)); YM2151(config, m_ym2151, XTAL(3'579'545)); // "3.58 MHz" on schematics and parts list m_ym2151->irq_handler().set(FUNC(s11c_bg_device::ym2151_irq_w)); m_ym2151->add_route(ALL_OUTPUTS, *this, 0.25); MC1408(config, "dac", 0).add_route(ALL_OUTPUTS, *this, 0.25); 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); HC55516(config, m_hc55516, 0).add_route(ALL_OUTPUTS, *this, 0.5); PIA6821(config, m_pia40, 0); m_pia40->writepa_handler().set("dac", FUNC(dac_byte_interface::data_w)); m_pia40->writepb_handler().set(FUNC(s11c_bg_device::pia40_pb_w)); m_pia40->ca2_handler().set(m_ym2151, FUNC(ym2151_device::reset_w)); m_pia40->cb2_handler().set(FUNC(s11c_bg_device::pia40_cb2_w)); m_pia40->irqa_handler().set_inputline(m_cpu, M6809_FIRQ_LINE); m_pia40->irqb_handler().set_inputline(m_cpu, INPUT_LINE_NMI); } void s11c_bg_device::device_start() { } void s11c_bg_device::device_reset() { m_cpubank->configure_entries(0, 8, &m_rom[0x10000], 0x8000); m_cpubank->set_entry(0); // reset the CPU again, so that the CPU are starting with the right vectors (otherwise sound may die on reset) m_cpu->pulse_input_line(INPUT_LINE_RESET, attotime::zero); } WRITE_LINE_MEMBER( s11c_bg_device::ym2151_irq_w) { if(state == CLEAR_LINE) m_pia40->ca1_w(1); else m_pia40->ca1_w(0); } WRITE8_MEMBER( s11c_bg_device::bg_speech_clock_w ) { // pulses clock input? m_hc55516->clock_w(1); m_hc55516->clock_w(0); } WRITE8_MEMBER( s11c_bg_device::bg_speech_digit_w ) { m_hc55516->digit_w(data); } WRITE8_MEMBER( s11c_bg_device::bgbank_w ) { uint8_t bank = ((data & 0x04) >> 2) | ((data & 0x03) << 1); m_cpubank->set_entry(bank); }