diff options
Diffstat (limited to 'src/devices/sound/ymf262.cpp')
-rw-r--r-- | src/devices/sound/ymf262.cpp | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/src/devices/sound/ymf262.cpp b/src/devices/sound/ymf262.cpp deleted file mode 100644 index e6b9782cb87..00000000000 --- a/src/devices/sound/ymf262.cpp +++ /dev/null @@ -1,138 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles - -#include "emu.h" -#include "ymf262.h" - - -DEFINE_DEVICE_TYPE(YMF262, ymf262_device, "ymf262", "YMF262 OPL3") - - -//********************************************************* -// YMF262 DEVICE -//********************************************************* - -//------------------------------------------------- -// ymf262_device - constructor -//------------------------------------------------- - -ymf262_device::ymf262_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, device_type type) : - device_t(mconfig, type, tag, owner, clock), - device_sound_interface(mconfig, *this), - m_address(0), - m_stream(nullptr), - m_fm(*this) -{ -} - - -//------------------------------------------------- -// read - handle a read from the device -//------------------------------------------------- - -u8 ymf262_device::read(offs_t offset) -{ - u8 result = 0x00; - switch (offset & 3) - { - case 0: // status port (A0=0, A1=0) - result = m_fm.status(); - break; - - default: // datasheet says anything else is not guaranteed - logerror("Unexpected read from YMF262 offset %d\n", offset & 3); - break; - } - return result; -} - - -//------------------------------------------------- -// write - handle a write to the register -// interface -//------------------------------------------------- - -void ymf262_device::write(offs_t offset, u8 value) -{ - switch (offset & 1) - { - case 0: // address ports - A1 references upper bank - m_address = value | (BIT(offset, 1) << 8); - - // tests reveal that in compatibility mode, upper bit is masked - // except for register 0x105 - if (m_fm.regs().newflag() == 0 && m_address != 0x105) - m_address &= 0xff; - break; - - case 1: // data ports (A1 is ignored) - - // force an update - m_stream->update(); - - // write to FM - m_fm.write(m_address, value); - break; - } -} - - -//------------------------------------------------- -// device_start - start of emulation -//------------------------------------------------- - -void ymf262_device::device_start() -{ - // create our stream - m_stream = stream_alloc(0, fm_engine::OUTPUTS, m_fm.sample_rate(clock())); - - // save our data - save_item(YMFM_NAME(m_address)); - - // save the engines - m_fm.save(*this); -} - - -//------------------------------------------------- -// device_reset - start of emulation -//------------------------------------------------- - -void ymf262_device::device_reset() -{ - // reset the engines - m_fm.reset(); -} - - -//------------------------------------------------- -// device_clock_changed - update if clock changes -//------------------------------------------------- - -void ymf262_device::device_clock_changed() -{ - m_stream->set_sample_rate(m_fm.sample_rate(clock())); -} - - -//------------------------------------------------- -// sound_stream_update - update the sound stream -//------------------------------------------------- - -void ymf262_device::sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) -{ - // iterate over all target samples - for (int sampindex = 0; sampindex < outputs[0].samples(); sampindex++) - { - // clock the system - m_fm.clock(fm_engine::ALL_CHANNELS); - - // update the FM content; clipping is unknown - s32 sums[fm_engine::OUTPUTS] = { 0 }; - m_fm.output(sums, 0, 32767, fm_engine::ALL_CHANNELS); - - // YMF262 outputs straight 16-bit data in 4 channels - for (int index = 0; index < fm_engine::OUTPUTS; index++) - outputs[index].put_int(sampindex, sums[index], 32768); - } -} |