diff options
Diffstat (limited to 'src/devices/bus/x68k/x68k_midi.cpp')
-rw-r--r-- | src/devices/bus/x68k/x68k_midi.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/devices/bus/x68k/x68k_midi.cpp b/src/devices/bus/x68k/x68k_midi.cpp new file mode 100644 index 00000000000..04b402f3843 --- /dev/null +++ b/src/devices/bus/x68k/x68k_midi.cpp @@ -0,0 +1,66 @@ +// license:BSD-3-Clause +// copyright-holders:Barry Rodewald +/* + * x68k_midi.c + * + * X68000 MIDI interface - YM3802 + * + */ + +#include "emu.h" +#include "bus/midi/midi.h" +#include "x68k_midi.h" + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(X68K_MIDI, x68k_midi_device, "x68k_midi", "X68000 MIDI Interface") + +MACHINE_CONFIG_MEMBER( x68k_midi_device::device_add_mconfig ) + MCFG_DEVICE_ADD("midi", YM3802, XTAL_1MHz) // clock is unknown + MCFG_YM3802_TXD_HANDLER(DEVWRITELINE("mdout",midi_port_device,write_txd)) + MCFG_YM3802_IRQ_HANDLER(WRITELINE(x68k_midi_device,irq_w)) + MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin") + MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout") +// MCFG_MIDI_PORT_ADD("mdthru", midiout_slot, "midiout") + // TODO: Add serial data handlers + +MACHINE_CONFIG_END + + +x68k_midi_device::x68k_midi_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, X68K_MIDI, tag, owner, clock) + , device_x68k_expansion_card_interface(mconfig, *this) + , m_slot(nullptr) + , m_midi(*this, "midi") +{ +} + +void x68k_midi_device::device_start() +{ + device_t* cpu = machine().device("maincpu"); + address_space& space = cpu->memory().space(AS_PROGRAM); + m_slot = dynamic_cast<x68k_expansion_slot_device *>(owner()); + space.install_readwrite_handler(0xeafa00,0xeafa0f,read8_delegate(FUNC(x68k_midi_device::x68k_midi_reg_r),this),write8_delegate(FUNC(x68k_midi_device::x68k_midi_reg_w),this),0x00ff00ff); +} + +void x68k_midi_device::device_reset() +{ +} + +READ8_MEMBER(x68k_midi_device::x68k_midi_reg_r) +{ + return m_midi->read(space, offset); +} + +WRITE8_MEMBER(x68k_midi_device::x68k_midi_reg_w) +{ + m_midi->write(space, offset, data); +} + +void x68k_midi_device::irq_w(int state) +{ + set_vector(MIDI_IRQ_VECTOR | (m_midi->vector() & 0x1f)); + m_slot->irq4_w(state); // selectable between IRQ2 and IRQ4 +} |