// license:BSD-3-Clause // copyright-holders:Olivier Galibert /*************************************************************************** n2a03.cpp 6502, NES variant ***************************************************************************/ #include "emu.h" #include "n2a03.h" #include "n2a03d.h" DEFINE_DEVICE_TYPE(N2A03_CORE, n2a03_core_device, "n2a03_core", "Ricoh N2A03 core") // needed for some VT systems with XOP instead of standard APU DEFINE_DEVICE_TYPE(N2A03, n2a03_device, "n2a03", "Ricoh N2A03") uint8_t n2a03_device::psg1_4014_r() { return m_apu->read(0x14); } uint8_t n2a03_device::psg1_4015_r() { return m_apu->read(0x15); } void n2a03_device::psg1_4015_w(uint8_t data) { m_apu->write(0x15, data); } void n2a03_device::psg1_4017_w(uint8_t data) { m_apu->write(0x17, data); } // on various drivers output port 0x4014 is used for external hardware (not used by APU?) // input/output port 0x4016 ^ (not used by APU?) // input port 0x4017 ^ ( APU_IRQCTRL ) // is there a fall through where every write is seen by other hw, or do these addresses really not touch the APU?? APU_IRQCTRL can definitely be written by can it be read back? void n2a03_device::n2a03_map(address_map &map) { map(0x4000, 0x4013).rw("nesapu", FUNC(nesapu_device::read), FUNC(nesapu_device::write)); map(0x4014, 0x4014).r(FUNC(n2a03_device::psg1_4014_r)); // .w(FUNC(nesapu_device::sprite_dma_0_w)); map(0x4015, 0x4015).rw(FUNC(n2a03_device::psg1_4015_r), FUNC(n2a03_device::psg1_4015_w)); /* PSG status / first control register */ //map(0x4016, 0x4016).rw(FUNC(n2a03_device::vsnes_in0_r), FUNC(n2a03_device::vsnes_in0_w)); map(0x4017, 0x4017) /*.r(FUNC(n2a03_device::vsnes_in1_r))*/ .w(FUNC(n2a03_device::psg1_4017_w)); } n2a03_core_device::n2a03_core_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : m6502_device(mconfig, type, tag, owner, clock) { } n2a03_core_device::n2a03_core_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : n2a03_core_device(mconfig, N2A03_CORE, tag, owner, clock) { } n2a03_device::n2a03_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : n2a03_core_device(mconfig, N2A03, tag, owner, clock) , device_mixer_interface(mconfig, *this, 1) , m_apu(*this, "nesapu") { program_config.m_internal_map = address_map_constructor(FUNC(n2a03_device::n2a03_map), this); } std::unique_ptr n2a03_core_device::create_disassembler() { return std::make_unique(); } WRITE_LINE_MEMBER(n2a03_device::apu_irq) { // games relying on the APU_IRQ don't seem to work anyway? (nes software list : timelord, mig29sf, firehawk) set_input_line(N2A03_APU_IRQ_LINE, state ? ASSERT_LINE : CLEAR_LINE); } uint8_t n2a03_device::apu_read_mem(offs_t offset) { return mintf->program.read_byte(offset); } void n2a03_device::device_add_mconfig(machine_config &config) { NES_APU(config, m_apu, DERIVED_CLOCK(1,1)); m_apu->irq().set(FUNC(n2a03_device::apu_irq)); m_apu->mem_read().set(FUNC(n2a03_device::apu_read_mem)); m_apu->add_route(ALL_OUTPUTS, *this, 1.0, AUTO_ALLOC_INPUT, 0); } #include "cpu/m6502/n2a03.hxx"