diff options
Diffstat (limited to 'src/devices/cpu/m6502/rp2a03.cpp')
-rw-r--r-- | src/devices/cpu/m6502/rp2a03.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/devices/cpu/m6502/rp2a03.cpp b/src/devices/cpu/m6502/rp2a03.cpp new file mode 100644 index 00000000000..4132e780d5a --- /dev/null +++ b/src/devices/cpu/m6502/rp2a03.cpp @@ -0,0 +1,99 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert +/*************************************************************************** + + rp2a03.cpp + + 6502, NES variant + +***************************************************************************/ + +#include "emu.h" +#include "rp2a03.h" +#include "rp2a03d.h" + +DEFINE_DEVICE_TYPE(RP2A03_CORE, rp2a03_core_device, "rp2a03_core", "Ricoh RP2A03 core") // needed for some VT systems with XOP instead of standard APU +DEFINE_DEVICE_TYPE(RP2A03, rp2a03_device, "rp2a03", "Ricoh RP2A03") // earliest version, found in punchout, spnchout, dkong3, VS. systems, and some early Famicoms +DEFINE_DEVICE_TYPE(RP2A03G, rp2a03g_device, "rp2a03g", "Ricoh RP2A03G") // later revision, found in front-loader NES + + +void rp2a03_device::rp2a03_map(address_map &map) +{ + map(0x4000, 0x4013).w(m_apu, FUNC(nesapu_device::write)); + map(0x4015, 0x4015).lw8(NAME([this](u8 data) { m_apu->write(0x15, data); })); + map(0x4017, 0x4017).lw8(NAME([this](u8 data) { m_apu->write(0x17, data); })); + map(0x4015, 0x4015).r(m_apu, FUNC(nesapu_device::status_r)); + // 0x4014 w -> NES sprite DMA (is this internal?) + // 0x4016 w -> d0-d2: RP2A03 OUT0,OUT1,OUT2 + // 0x4016 r -> d0-d4: RP2A03 IN0 + // 0x4017 r -> d0-d4: RP2A03 IN1 +} + + + +rp2a03_core_device::rp2a03_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) +{ +} + +rp2a03_core_device::rp2a03_core_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : rp2a03_core_device(mconfig, RP2A03_CORE, tag, owner, clock) +{ +} + + + +rp2a03_device::rp2a03_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) + : rp2a03_core_device(mconfig, type, tag, owner, clock) + , device_mixer_interface(mconfig, *this) + , m_apu(*this, "nesapu") +{ + program_config.m_internal_map = address_map_constructor(FUNC(rp2a03_device::rp2a03_map), this); +} + +rp2a03_device::rp2a03_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : rp2a03_device(mconfig, RP2A03, tag, owner, clock) +{ +} + +rp2a03g_device::rp2a03g_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : rp2a03_device(mconfig, RP2A03G, tag, owner, clock) +{ +} + + + +std::unique_ptr<util::disasm_interface> rp2a03_core_device::create_disassembler() +{ + return std::make_unique<rp2a03_disassembler>(); +} + +void rp2a03_device::apu_irq(int state) +{ + // games relying on the APU_IRQ don't seem to work anyway? (nes software list : timelord, mig29sf, firehawk) + set_input_line(RP2A03_APU_IRQ_LINE, state ? ASSERT_LINE : CLEAR_LINE); +} + +uint8_t rp2a03_device::apu_read_mem(offs_t offset) +{ + return mintf->program.read_byte(offset); +} + +void rp2a03_device::device_add_mconfig(machine_config &config) +{ + APU_2A03(config, m_apu, DERIVED_CLOCK(1,1)); + m_apu->irq().set(FUNC(rp2a03_device::apu_irq)); + m_apu->mem_read().set(FUNC(rp2a03_device::apu_read_mem)); + m_apu->add_route(ALL_OUTPUTS, *this, 1.0, 0); +} + +void rp2a03g_device::device_add_mconfig(machine_config &config) +{ + NES_APU(config, m_apu, DERIVED_CLOCK(1,1)); + m_apu->irq().set(FUNC(rp2a03g_device::apu_irq)); + m_apu->mem_read().set(FUNC(rp2a03g_device::apu_read_mem)); + m_apu->add_route(ALL_OUTPUTS, *this, 1.0, 0); +} + + +#include "cpu/m6502/rp2a03.hxx" |