diff options
Diffstat (limited to 'src/devices/bus/msx_slot/music.cpp')
-rw-r--r-- | src/devices/bus/msx_slot/music.cpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/devices/bus/msx_slot/music.cpp b/src/devices/bus/msx_slot/music.cpp new file mode 100644 index 00000000000..5c7d0905427 --- /dev/null +++ b/src/devices/bus/msx_slot/music.cpp @@ -0,0 +1,49 @@ +// license:BSD-3-Clause +// copyright-holders:Wilbert Pol +#include "emu.h" +#include "music.h" + + +const device_type MSX_SLOT_MUSIC = &device_creator<msx_slot_music_device>; + + +msx_slot_music_device::msx_slot_music_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : msx_slot_rom_device(mconfig, MSX_SLOT_MUSIC, "MSX Internal MSX-MUSIC", tag, owner, clock, "msx_slot_music", __FILE__) + , m_ym2413(NULL) + , m_ym2413_tag(NULL) +{ +} + + +void msx_slot_music_device::device_start() +{ + msx_slot_rom_device::device_start(); + + if (m_ym2413_tag == NULL) + { + fatalerror("msx_slot_music_device: no YM2413 tag specified\n"); + } + + m_ym2413 = owner()->subdevice<ym2413_device>(m_ym2413_tag); + + if (m_ym2413 == NULL) + { + fatalerror("msx_slot_ym2413_device: Unable to find YM2413 with tag '%s'\n", m_ym2413_tag); + } + + // Install IO read/write handlers + address_space &space = machine().device<cpu_device>("maincpu")->space(AS_IO); + space.install_write_handler(0x7c, 0x7d, write8_delegate(FUNC(msx_slot_music_device::write_ym2413), this)); +} + + +READ8_MEMBER(msx_slot_music_device::read) +{ + return msx_slot_rom_device::read(space, offset); +} + + +WRITE8_MEMBER(msx_slot_music_device::write_ym2413) +{ + m_ym2413->write(space, offset & 1, data); +} |