827 lines
28 KiB
C++
827 lines
28 KiB
C++
// BSD 3-Clause License
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//
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// Copyright (c) 2021, Aaron Giles
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "ymfm_opz.h"
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#include "ymfm_fm.ipp"
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#define TEMPORARY_DEBUG_PRINTS (0)
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//
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// OPZ (aka YM2414)
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//
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// This chip is not officially documented as far as I know. What I have
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// comes from this site:
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//
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// http://sr4.sakura.ne.jp/fmsound/opz.html
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//
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// and from reading the TX81Z operator manual, which describes how a number
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// of these new features work.
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//
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// OPZ appears be bsaically OPM with a bunch of extra features.
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//
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// For starters, there are two LFO generators. I have presumed that they
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// operate identically since identical parameters are offered for each. I
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// have also presumed the effects are additive between them. The LFOs on
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// the OPZ have an extra "sync" option which apparently causes the LFO to
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// reset whenever a key on is received.
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//
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// At the channel level, there is an additional 8-bit volume control. This
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// might work as an addition to total level, or some other way. Completely
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// unknown, and unimplemented.
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//
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// At the operator level, there are a number of extra features. First, there
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// are 8 different waveforms to choose from. These are different than the
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// waveforms introduced in the OPL2 and later chips.
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//
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// Second, there is an additional "reverb" stage added to the envelope
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// generator, which kicks in when the envelope reaches -18dB. It specifies
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// a slower decay rate to produce a sort of faux reverb effect.
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//
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// The envelope generator also supports a 2-bit shift value, which can be
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// used to reduce the effect of the envelope attenuation.
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//
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// OPZ supports a "fixed frequency" mode for each operator, with a 3-bit
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// range and 4-bit frequency value, plus a 1-bit enable. Not sure how that
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// works at all, so it's not implemented.
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// note by tildearrow:
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// - I have verified behavior of this mode against real hardware.
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// after applying a small fix on the existing early implementation, it matches hardware.
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// this means fixed frequency is fully implemented and working.
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//
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// There are also several mystery fields in the operators which I have no
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// clue about: "fine" (4 bits), "eg_shift" (2 bits), and "rev" (3 bits).
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// eg_shift is some kind of envelope generator effect, but how it works is
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// unknown.
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// note by tildearrow:
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// - behavior of "fine" is now confirmed and matches hardware.
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//
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// Also, according to the site above, the panning controls are changed from
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// OPM, with a "mono" bit and only one control bit for the right channel.
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// Current implementation is just a guess.
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//
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// additional modifications by tildearrow for Furnace
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//
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namespace ymfm
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{
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//*********************************************************
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// OPZ REGISTERS
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//*********************************************************
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//-------------------------------------------------
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// opz_registers - constructor
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//-------------------------------------------------
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opz_registers::opz_registers() :
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m_lfo_counter{ 0, 0 },
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m_noise_lfsr(1),
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m_noise_counter(0),
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m_noise_state(0),
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m_noise_lfo(0),
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m_lfo_am{ 0, 0 }
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{
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// create the waveforms
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for (uint32_t index = 0; index < WAVEFORM_LENGTH; index++)
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m_waveform[0][index] = abs_sin_attenuation(index) | (bitfield(index, 9) << 15);
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// we only have the diagrams to judge from, but suspecting waveform 1 (and
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// derived waveforms) are sin^2, based on OPX description of similar wave-
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// forms; since our sin table is logarithmic, this ends up just being
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// 2*existing value
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uint16_t zeroval = m_waveform[0][0];
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for (uint32_t index = 0; index < WAVEFORM_LENGTH; index++)
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m_waveform[1][index] = std::min<uint16_t>(2 * (m_waveform[0][index] & 0x7fff), zeroval) | (bitfield(index, 9) << 15);
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// remaining waveforms are just derivations of the 2 main ones
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for (uint32_t index = 0; index < WAVEFORM_LENGTH; index++)
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{
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m_waveform[2][index] = bitfield(index, 9) ? zeroval : m_waveform[0][index];
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m_waveform[3][index] = bitfield(index, 9) ? zeroval : m_waveform[1][index];
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m_waveform[4][index] = bitfield(index, 9) ? zeroval : m_waveform[0][index * 2];
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m_waveform[5][index] = bitfield(index, 9) ? zeroval : m_waveform[1][index * 2];
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m_waveform[6][index] = bitfield(index, 9) ? zeroval : m_waveform[0][(index * 2) & 0x1ff];
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m_waveform[7][index] = bitfield(index, 9) ? zeroval : m_waveform[1][(index * 2) & 0x1ff];
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}
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// create the LFO waveforms; AM in the low 8 bits, PM in the upper 8
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// waveforms are adjusted to match the pictures in the application manual
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for (uint32_t index = 0; index < LFO_WAVEFORM_LENGTH; index++)
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{
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// waveform 0 is a sawtooth
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uint8_t am = index ^ 0xff;
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int8_t pm = int8_t(index);
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m_lfo_waveform[0][index] = am | (pm << 8);
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// waveform 1 is a square wave
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am = bitfield(index, 7) ? 0 : 0xff;
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pm = int8_t(am ^ 0x80);
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m_lfo_waveform[1][index] = am | (pm << 8);
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// waveform 2 is a triangle wave
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am = bitfield(index, 7) ? (index << 1) : ((index ^ 0xff) << 1);
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pm = int8_t(bitfield(index, 6) ? am : ~am);
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m_lfo_waveform[2][index] = am | (pm << 8);
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// waveform 3 is noise; it is filled in dynamically
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}
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}
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//-------------------------------------------------
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// reset - reset to initial state
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//-------------------------------------------------
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void opz_registers::reset()
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{
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std::fill_n(&m_regdata[0], REGISTERS, 0);
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// enable output on both channels by default
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m_regdata[0x30] = m_regdata[0x31] = m_regdata[0x32] = m_regdata[0x33] = 0x01;
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m_regdata[0x34] = m_regdata[0x35] = m_regdata[0x36] = m_regdata[0x37] = 0x01;
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}
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//-------------------------------------------------
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// save_restore - save or restore the data
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//-------------------------------------------------
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void opz_registers::save_restore(ymfm_saved_state &state)
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{
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state.save_restore(m_lfo_counter);
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state.save_restore(m_lfo_am);
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state.save_restore(m_noise_lfsr);
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state.save_restore(m_noise_counter);
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state.save_restore(m_noise_state);
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state.save_restore(m_noise_lfo);
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state.save_restore(m_regdata);
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state.save_restore(m_phase_substep);
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}
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//-------------------------------------------------
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// operator_map - return an array of operator
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// indices for each channel; for OPZ this is fixed
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//-------------------------------------------------
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void opz_registers::operator_map(operator_mapping &dest) const
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{
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// Note that the channel index order is 0,2,1,3, so we bitswap the index.
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//
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// This is because the order in the map is:
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// carrier 1, carrier 2, modulator 1, modulator 2
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//
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// But when wiring up the connections, the more natural order is:
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// carrier 1, modulator 1, carrier 2, modulator 2
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static const operator_mapping s_fixed_map =
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{ {
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operator_list( 0, 16, 8, 24 ), // Channel 0 operators
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operator_list( 1, 17, 9, 25 ), // Channel 1 operators
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operator_list( 2, 18, 10, 26 ), // Channel 2 operators
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operator_list( 3, 19, 11, 27 ), // Channel 3 operators
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operator_list( 4, 20, 12, 28 ), // Channel 4 operators
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operator_list( 5, 21, 13, 29 ), // Channel 5 operators
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operator_list( 6, 22, 14, 30 ), // Channel 6 operators
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operator_list( 7, 23, 15, 31 ), // Channel 7 operators
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} };
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dest = s_fixed_map;
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}
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//-------------------------------------------------
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// write - handle writes to the register array
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//-------------------------------------------------
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bool opz_registers::write(uint16_t index, uint8_t data, uint32_t &channel, uint32_t &opmask)
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{
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assert(index < REGISTERS);
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// special mappings:
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// 0x16 -> 0x188 if bit 7 is set
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// 0x19 -> 0x189 if bit 7 is set
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// 0x38..0x3F -> 0x180..0x187 if bit 7 is set
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// 0x40..0x5F -> 0x100..0x11F if bit 7 is set
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// 0xC0..0xDF -> 0x120..0x13F if bit 5 is set
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if (index == 0x17 && bitfield(data, 7) != 0)
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m_regdata[0x188] = data;
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else if (index == 0x19 && bitfield(data, 7) != 0)
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m_regdata[0x189] = data;
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else if ((index & 0xf8) == 0x38 && bitfield(data, 7) != 0)
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m_regdata[0x180 + (index & 7)] = data;
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else if ((index & 0xe0) == 0x40 && bitfield(data, 7) != 0)
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m_regdata[0x100 + (index & 0x1f)] = data;
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else if ((index & 0xe0) == 0xc0 && bitfield(data, 5) != 0)
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m_regdata[0x120 + (index & 0x1f)] = data;
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else if (index < 0x100)
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m_regdata[index] = data;
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// preset writes restore some values from a preset memory; not sure
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// how this really works but the TX81Z will overwrite the sustain level/
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// release rate register and the envelope shift/reverb rate register to
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// dampen sound, then write the preset number to register 8 to restore them
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if (index == 0x08)
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{
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int chan = bitfield(data, 0, 3);
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if (TEMPORARY_DEBUG_PRINTS)
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printf("Loading preset %d\n", chan);
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m_regdata[0xe0 + chan + 0] = m_regdata[0x140 + chan + 0];
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m_regdata[0xe0 + chan + 8] = m_regdata[0x140 + chan + 8];
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m_regdata[0xe0 + chan + 16] = m_regdata[0x140 + chan + 16];
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m_regdata[0xe0 + chan + 24] = m_regdata[0x140 + chan + 24];
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m_regdata[0x120 + chan + 0] = m_regdata[0x160 + chan + 0];
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m_regdata[0x120 + chan + 8] = m_regdata[0x160 + chan + 8];
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m_regdata[0x120 + chan + 16] = m_regdata[0x160 + chan + 16];
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m_regdata[0x120 + chan + 24] = m_regdata[0x160 + chan + 24];
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}
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// store the presets under some unknown condition; the pattern of writes
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// when setting a new preset is:
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//
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// 08 (0-7), 80-9F, A0-BF, C0-DF, C0-DF (alt), 20-27, 40-5F, 40-5F (alt),
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// C0-DF (alt -- again?), 38-3F, 1B, 18, E0-FF
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//
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// So it writes 0-7 to 08 to either reset all presets or to indicate
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// that we're going to be loading them. Immediately after all the writes
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// above, the very next write will be temporary values to blow away the
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// values loaded into E0-FF, so somehow it also knows that anything after
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// that point is not part of the preset.
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//
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// For now, try using the 40-5F (alt) writes as flags that presets are
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// being loaded until the E0-FF writes happen.
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bool is_setting_preset = (bitfield(m_regdata[0x100 + (index & 0x1f)], 7) != 0);
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if (is_setting_preset)
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{
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//printf("ISP\n");
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if ((index & 0xe0) == 0xe0)
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{
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m_regdata[0x140 + (index & 0x1f)] = data;
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m_regdata[0x100 + (index & 0x1f)] &= 0x7f;
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}
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else if ((index & 0xe0) == 0xc0 && bitfield(data, 5) != 0)
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m_regdata[0x160 + (index & 0x1f)] = data;
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}
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// handle writes to the key on index
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// note from tildearrow:
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// - are you kidding? I have to write to this "load preset" register before keying on?
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// another note from tildearrow:
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// - see https://github.com/110-kenichi/ymfm/blob/main/src/ymfm_opz.cpp
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// - is 0x08 the actual key on register just like OPM?
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// - if so then what's bit 5?
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if ((index & 0xf8) == 0x20 /*&& bitfield(index, 0, 3) == bitfield(m_regdata[0x08], 0, 3)*/)
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{
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channel = bitfield(index, 0, 3);
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opmask = ch_key_on(channel) ? 0xf : 0;
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//printf("%d opmask is %d\n",opmask,channel);
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// according to the TX81Z manual, the sync option causes the LFOs
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// to reset at each note on
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if (opmask != 0)
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{
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if (lfo_sync())
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m_lfo_counter[0] = 0;
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if (lfo2_sync())
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m_lfo_counter[1] = 0;
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}
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return true;
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}
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return false;
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}
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//-------------------------------------------------
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// clock_noise_and_lfo - clock the noise and LFO,
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// handling clock division, depth, and waveform
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// computations
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//-------------------------------------------------
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int32_t opz_registers::clock_noise_and_lfo()
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{
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// base noise frequency is measured at 2x 1/2 FM frequency; this
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// means each tick counts as two steps against the noise counter
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uint32_t freq = noise_frequency() ^ 0x1f;
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for (int rep = 0; rep < 2; rep++)
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{
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// evidence seems to suggest the LFSR is clocked continually and just
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// sampled at the noise frequency for output purposes; note that the
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// low 8 bits are the most recent 8 bits of history while bits 8-24
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// contain the 17 bit LFSR state
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m_noise_lfsr <<= 1;
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m_noise_lfsr |= bitfield(m_noise_lfsr, 17) ^ bitfield(m_noise_lfsr, 14) ^ 1;
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// compare against the frequency and latch when we exceed it
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if (m_noise_counter++ >= freq)
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{
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m_noise_counter = 0;
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m_noise_state = bitfield(m_noise_lfsr, 17);
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}
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}
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// treat the rate as a 4.4 floating-point step value with implied
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// leading 1; this matches exactly the frequencies in the application
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// manual, though it might not be implemented exactly this way on chip
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uint32_t rate0 = lfo_rate();
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uint32_t rate1 = lfo2_rate();
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if (rate0 != 0) {
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m_lfo_counter[0] += (0x10 | bitfield(rate0, 0, 4)) << bitfield(rate0, 4, 4);
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}
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if (rate1 != 0) {
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m_lfo_counter[1] += (0x10 | bitfield(rate1, 0, 4)) << bitfield(rate1, 4, 4);
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}
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uint32_t lfo0 = bitfield(m_lfo_counter[0], 22, 8);
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uint32_t lfo1 = bitfield(m_lfo_counter[1], 22, 8);
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// fill in the noise entry 1 ahead of our current position; this
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// ensures the current value remains stable for a full LFO clock
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// and effectively latches the running value when the LFO advances
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uint32_t lfo_noise = bitfield(m_noise_lfsr, 17, 8);
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m_lfo_waveform[3][(lfo0 + 1) & 0xff] = lfo_noise | (lfo_noise << 8);
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m_lfo_waveform[3][(lfo1 + 1) & 0xff] = lfo_noise | (lfo_noise << 8);
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// fetch the AM/PM values based on the waveform; AM is unsigned and
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// encoded in the low 8 bits, while PM signed and encoded in the upper
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// 8 bits
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int32_t ampm0 = m_lfo_waveform[lfo_waveform()][lfo0];
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int32_t ampm1 = m_lfo_waveform[lfo2_waveform()][lfo1];
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// apply depth to the AM values and store for later
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m_lfo_am[0] = ((ampm0 & 0xff) * lfo_am_depth()) >> 7;
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m_lfo_am[1] = ((ampm1 & 0xff) * lfo2_am_depth()) >> 7;
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// apply depth to the PM values and return them combined into two
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int32_t pm0 = ((ampm0 >> 8) * int32_t(lfo_pm_depth())) >> 7;
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int32_t pm1 = ((ampm1 >> 8) * int32_t(lfo2_pm_depth())) >> 7;
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return (pm0 & 0xff) | (pm1 << 8);
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}
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//-------------------------------------------------
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// lfo_am_offset - return the AM offset from LFO
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// for the given channel
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//-------------------------------------------------
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uint32_t opz_registers::lfo_am_offset(uint32_t choffs) const
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{
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// not sure how this works for real, but just adding the two
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// AM LFOs together
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uint32_t result = 0;
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// shift value for AM sensitivity is [*, 0, 1, 2],
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// mapping to values of [0, 23.9, 47.8, and 95.6dB]
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uint32_t am_sensitivity = ch_lfo_am_sens(choffs);
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if (am_sensitivity != 0)
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result = m_lfo_am[0] << (am_sensitivity - 1);
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// QUESTION: see OPN note below for the dB range mapping; it applies
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// here as well
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// raw LFO AM value on OPZ is 0-FF, which is already a factor of 2
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// larger than the OPN below, putting our staring point at 2x theirs;
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// this works out since our minimum is 2x their maximum
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uint32_t am_sensitivity2 = ch_lfo2_am_sens(choffs);
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if (am_sensitivity2 != 0)
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result += m_lfo_am[1] << (am_sensitivity2 - 1);
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return result;
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}
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//-------------------------------------------------
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// cache_operator_data - fill the operator cache
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// with prefetched data
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//-------------------------------------------------
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void opz_registers::cache_operator_data(uint32_t choffs, uint32_t opoffs, opdata_cache &cache)
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{
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// TODO: what is op_rev()?
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// set up the easy stuff
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cache.waveform = &m_waveform[op_waveform(opoffs)][0];
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|
|
// get frequency from the channel
|
|
uint32_t block_freq = cache.block_freq = ch_block_freq(choffs);
|
|
|
|
// compute the keycode: block_freq is:
|
|
//
|
|
// BBBCCCCFFFFFF
|
|
// ^^^^^
|
|
//
|
|
// the 5-bit keycode is just the top 5 bits (block + top 2 bits
|
|
// of the key code)
|
|
uint32_t keycode = bitfield(block_freq, 8, 5);
|
|
|
|
// detune adjustment
|
|
cache.detune = detune_adjustment(op_detune(opoffs), keycode);
|
|
|
|
// multiple value, as an x.4 value (0 means 0.5)
|
|
// the "fine" control provides the fractional bits
|
|
cache.multiple = op_multiple(opoffs) << 4;
|
|
if (cache.multiple == 0)
|
|
cache.multiple = 0x08;
|
|
cache.multiple |= op_fine(opoffs);
|
|
|
|
// phase step, or PHASE_STEP_DYNAMIC if PM is active; this depends on
|
|
// block_freq, detune, and multiple, so compute it after we've done those;
|
|
// note that fix frequency mode is also treated as dynamic
|
|
if (!op_fix_mode(opoffs) && (lfo_pm_depth() == 0 || ch_lfo_pm_sens(choffs) == 0) && (lfo2_pm_depth() == 0 || ch_lfo2_pm_sens(choffs) == 0))
|
|
cache.phase_step = compute_phase_step(choffs, opoffs, cache, 0);
|
|
else
|
|
cache.phase_step = opdata_cache::PHASE_STEP_DYNAMIC;
|
|
|
|
// total level, scaled by 8
|
|
// TODO: how does ch_volume() fit into this?
|
|
cache.total_level = op_total_level(opoffs) << 3;
|
|
|
|
// 4-bit sustain level, but 15 means 31 so effectively 5 bits
|
|
cache.eg_sustain = op_sustain_level(opoffs);
|
|
cache.eg_sustain |= (cache.eg_sustain + 1) & 0x10;
|
|
cache.eg_sustain <<= 5;
|
|
|
|
// determine KSR adjustment for enevlope rates
|
|
uint32_t ksrval = keycode >> (op_ksr(opoffs) ^ 3);
|
|
cache.eg_rate[EG_ATTACK] = effective_rate(op_attack_rate(opoffs) * 2, ksrval);
|
|
cache.eg_rate[EG_DECAY] = effective_rate(op_decay_rate(opoffs) * 2, ksrval);
|
|
cache.eg_rate[EG_SUSTAIN] = effective_rate(op_sustain_rate(opoffs) * 2, ksrval);
|
|
cache.eg_rate[EG_RELEASE] = effective_rate(op_release_rate(opoffs) * 4 + 2, ksrval);
|
|
cache.eg_rate[EG_REVERB] = cache.eg_rate[EG_RELEASE];
|
|
uint32_t reverb = op_reverb_rate(opoffs);
|
|
if (reverb != 0)
|
|
cache.eg_rate[EG_REVERB] = std::min<uint32_t>(effective_rate(reverb * 4 + 2, ksrval), cache.eg_rate[EG_REVERB]);
|
|
|
|
// set the envelope shift; TX81Z manual says operator 1 (actually operator 4) shift is fixed at "off"
|
|
cache.eg_shift = ((opoffs & 0x18) == 0x18) ? 0 : op_eg_shift(opoffs);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// compute_phase_step - compute the phase step
|
|
//-------------------------------------------------
|
|
|
|
uint32_t opz_registers::compute_phase_step(uint32_t choffs, uint32_t opoffs, opdata_cache const &cache, int32_t lfo_raw_pm)
|
|
{
|
|
// OPZ has a fixed frequency mode; it is unclear whether the
|
|
// detune and multiple parameters affect things
|
|
|
|
uint32_t phase_step;
|
|
if (op_fix_mode(opoffs))
|
|
{
|
|
// the baseline frequency in hz comes from the fix frequency and fine
|
|
// registers, which can specify values 8-255Hz in 1Hz increments; that
|
|
// value is then shifted up by the 3-bit range
|
|
uint32_t freq = op_fix_frequency(opoffs) << 4;
|
|
if (freq == 0)
|
|
freq = 8;
|
|
freq |= op_fine(opoffs);
|
|
freq <<= op_fix_range(opoffs);
|
|
|
|
// there is not enough resolution in the plain phase step to track the
|
|
// full range of frequencies, so we keep a per-operator sub step with an
|
|
// additional 12 bits of resolution; this calculation gives us, for
|
|
// example, a frequency of 8.0009Hz when 8Hz is requested
|
|
uint32_t substep = m_phase_substep[opoffs];
|
|
substep += 75 * 1024 * freq;
|
|
phase_step = substep >> 12;
|
|
m_phase_substep[opoffs] = substep & 0xfff;
|
|
|
|
// detune/multiple occupy the same space as fix_range/fix_frequency so
|
|
// don't apply them in addition
|
|
return phase_step;
|
|
}
|
|
else
|
|
{
|
|
// start with coarse detune delta; table uses cents value from
|
|
// manual, converted into 1/64ths
|
|
static const int16_t s_detune2_delta[4] = { 0, (600*64+50)/100, (781*64+50)/100, (950*64+50)/100 };
|
|
int32_t delta = s_detune2_delta[op_detune2(opoffs)];
|
|
|
|
// add in the PM deltas
|
|
uint32_t pm_sensitivity = ch_lfo_pm_sens(choffs);
|
|
if (pm_sensitivity != 0)
|
|
{
|
|
// raw PM value is -127..128 which is +/- 200 cents
|
|
// manual gives these magnitudes in cents:
|
|
// 0, +/-5, +/-10, +/-20, +/-50, +/-100, +/-400, +/-700
|
|
// this roughly corresponds to shifting the 200-cent value:
|
|
// 0 >> 5, >> 4, >> 3, >> 2, >> 1, << 1, << 2
|
|
if (pm_sensitivity < 6)
|
|
delta += int8_t(lfo_raw_pm) >> (6 - pm_sensitivity);
|
|
else
|
|
delta += int8_t(lfo_raw_pm) << (pm_sensitivity - 5);
|
|
}
|
|
uint32_t pm_sensitivity2 = ch_lfo2_pm_sens(choffs);
|
|
if (pm_sensitivity2 != 0)
|
|
{
|
|
// raw PM value is -127..128 which is +/- 200 cents
|
|
// manual gives these magnitudes in cents:
|
|
// 0, +/-5, +/-10, +/-20, +/-50, +/-100, +/-400, +/-700
|
|
// this roughly corresponds to shifting the 200-cent value:
|
|
// 0 >> 5, >> 4, >> 3, >> 2, >> 1, << 1, << 2
|
|
if (pm_sensitivity2 < 6)
|
|
delta += int8_t(lfo_raw_pm >> 8) >> (6 - pm_sensitivity2);
|
|
else
|
|
delta += int8_t(lfo_raw_pm >> 8) << (pm_sensitivity2 - 5);
|
|
}
|
|
|
|
// apply delta and convert to a frequency number; this translation is
|
|
// the same as OPM so just re-use that helper
|
|
phase_step = opm_key_code_to_phase_step(cache.block_freq, delta);
|
|
|
|
// apply detune based on the keycode
|
|
phase_step += cache.detune;
|
|
|
|
// apply frequency multiplier (which is cached as an x.4 value)
|
|
return (phase_step * cache.multiple) >> 4;
|
|
}
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// log_keyon - log a key-on event
|
|
//-------------------------------------------------
|
|
|
|
std::string opz_registers::log_keyon(uint32_t choffs, uint32_t opoffs)
|
|
{
|
|
uint32_t chnum = choffs;
|
|
uint32_t opnum = opoffs;
|
|
|
|
char buffer[256];
|
|
char *end = &buffer[0];
|
|
|
|
end += snprintf(end, 256-(end-buffer), "%u.%02u", chnum, opnum);
|
|
|
|
if (op_fix_mode(opoffs))
|
|
end += snprintf(end, 256-(end-buffer), " fixfreq=%X fine=%X shift=%X", op_fix_frequency(opoffs), op_fine(opoffs), op_fix_range(opoffs));
|
|
else
|
|
end += snprintf(end, 256-(end-buffer), " freq=%04X dt2=%u fine=%X", ch_block_freq(choffs), op_detune2(opoffs), op_fine(opoffs));
|
|
|
|
end += snprintf(end, 256-(end-buffer), " dt=%u fb=%u alg=%X mul=%X tl=%02X ksr=%u adsr=%02X/%02X/%02X/%X sl=%X out=%c%c",
|
|
op_detune(opoffs),
|
|
ch_feedback(choffs),
|
|
ch_algorithm(choffs),
|
|
op_multiple(opoffs),
|
|
op_total_level(opoffs),
|
|
op_ksr(opoffs),
|
|
op_attack_rate(opoffs),
|
|
op_decay_rate(opoffs),
|
|
op_sustain_rate(opoffs),
|
|
op_release_rate(opoffs),
|
|
op_sustain_level(opoffs),
|
|
ch_output_0(choffs) ? 'L' : '-',
|
|
ch_output_1(choffs) ? 'R' : '-');
|
|
|
|
if (op_eg_shift(opoffs) != 0)
|
|
end += snprintf(end, 256-(end-buffer), " egshift=%u", op_eg_shift(opoffs));
|
|
|
|
bool am = (lfo_am_depth() != 0 && ch_lfo_am_sens(choffs) != 0 && op_lfo_am_enable(opoffs) != 0);
|
|
if (am)
|
|
end += snprintf(end, 256-(end-buffer), " am=%u/%02X", ch_lfo_am_sens(choffs), lfo_am_depth());
|
|
bool pm = (lfo_pm_depth() != 0 && ch_lfo_pm_sens(choffs) != 0);
|
|
if (pm)
|
|
end += snprintf(end, 256-(end-buffer), " pm=%u/%02X", ch_lfo_pm_sens(choffs), lfo_pm_depth());
|
|
if (am || pm)
|
|
end += snprintf(end, 256-(end-buffer), " lfo=%02X/%c", lfo_rate(), "WQTN"[lfo_waveform()]);
|
|
|
|
bool am2 = (lfo2_am_depth() != 0 && ch_lfo2_am_sens(choffs) != 0 && op_lfo_am_enable(opoffs) != 0);
|
|
if (am2)
|
|
end += snprintf(end, 256-(end-buffer), " am2=%u/%02X", ch_lfo2_am_sens(choffs), lfo2_am_depth());
|
|
bool pm2 = (lfo2_pm_depth() != 0 && ch_lfo2_pm_sens(choffs) != 0);
|
|
if (pm2)
|
|
end += snprintf(end, 256-(end-buffer), " pm2=%u/%02X", ch_lfo2_pm_sens(choffs), lfo2_pm_depth());
|
|
if (am2 || pm2)
|
|
end += snprintf(end, 256-(end-buffer), " lfo2=%02X/%c", lfo2_rate(), "WQTN"[lfo2_waveform()]);
|
|
|
|
if (op_reverb_rate(opoffs) != 0)
|
|
end += snprintf(end, 256-(end-buffer), " rev=%u", op_reverb_rate(opoffs));
|
|
if (op_waveform(opoffs) != 0)
|
|
end += snprintf(end, 256-(end-buffer), " wf=%u", op_waveform(opoffs));
|
|
if (noise_enable() && opoffs == 31)
|
|
end += snprintf(end, 256-(end-buffer), " noise=1");
|
|
|
|
return buffer;
|
|
}
|
|
|
|
|
|
|
|
//*********************************************************
|
|
// YM2414
|
|
//*********************************************************
|
|
|
|
//-------------------------------------------------
|
|
// ym2414 - constructor
|
|
//-------------------------------------------------
|
|
|
|
ym2414::ym2414(ymfm_interface &intf) :
|
|
m_address(0),
|
|
m_fm(intf)
|
|
{
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// reset - reset the system
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::reset()
|
|
{
|
|
// reset the engines
|
|
m_fm.reset();
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// save_restore - save or restore the data
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::save_restore(ymfm_saved_state &state)
|
|
{
|
|
m_fm.save_restore(state);
|
|
state.save_restore(m_address);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// read_status - read the status register
|
|
//-------------------------------------------------
|
|
|
|
uint8_t ym2414::read_status()
|
|
{
|
|
uint8_t result = m_fm.status();
|
|
if (m_fm.intf().ymfm_is_busy())
|
|
result |= fm_engine::STATUS_BUSY;
|
|
return result;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// read - handle a read from the device
|
|
//-------------------------------------------------
|
|
|
|
uint8_t ym2414::read(uint32_t offset)
|
|
{
|
|
uint8_t result = 0xff;
|
|
switch (offset & 1)
|
|
{
|
|
case 0: // data port (unused)
|
|
debug::log_unexpected_read_write("Unexpected read from YM2414 offset %d\n", offset & 3);
|
|
break;
|
|
|
|
case 1: // status port, YM2203 compatible
|
|
result = read_status();
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// write_address - handle a write to the address
|
|
// register
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::write_address(uint8_t data)
|
|
{
|
|
// just set the address
|
|
m_address = data;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// write - handle a write to the register
|
|
// interface
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::write_data(uint8_t data)
|
|
{
|
|
// write the FM register
|
|
m_fm.write(m_address, data);
|
|
if (TEMPORARY_DEBUG_PRINTS)
|
|
{
|
|
switch (m_address & 0xe0)
|
|
{
|
|
case 0x00:
|
|
printf("CTL %02X = %02X\n", m_address, data);
|
|
break;
|
|
|
|
case 0x20:
|
|
switch (m_address & 0xf8)
|
|
{
|
|
case 0x20: printf("R/FBL/ALG %d = %02X\n", m_address & 7, data); break;
|
|
case 0x28: printf("KC %d = %02X\n", m_address & 7, data); break;
|
|
case 0x30: printf("KF/M %d = %02X\n", m_address & 7, data); break;
|
|
case 0x38: printf("PMS/AMS %d = %02X\n", m_address & 7, data); break;
|
|
}
|
|
break;
|
|
|
|
case 0x40:
|
|
if (bitfield(data, 7) == 0)
|
|
printf("DT1/MUL %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
else
|
|
printf("OW/FINE %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
|
|
case 0x60:
|
|
printf("TL %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
|
|
case 0x80:
|
|
printf("KRS/FIX/AR %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
|
|
case 0xa0:
|
|
printf("A/D1R %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
|
|
case 0xc0:
|
|
if (bitfield(data, 5) == 0)
|
|
printf("DT2/D2R %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
else
|
|
printf("EGS/REV %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
|
|
case 0xe0:
|
|
printf("D1L/RR %d.%d = %02X\n", m_address & 7, (m_address >> 3) & 3, data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// special cases
|
|
if (m_address == 0x1b)
|
|
{
|
|
// writes to register 0x1B send the upper 2 bits to the output lines
|
|
m_fm.intf().ymfm_external_write(ACCESS_IO, 0, data >> 6);
|
|
}
|
|
|
|
// mark busy for a bit
|
|
m_fm.intf().ymfm_set_busy_end(32 * m_fm.clock_prescale());
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// write - handle a write to the register
|
|
// interface
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::write(uint32_t offset, uint8_t data)
|
|
{
|
|
switch (offset & 1)
|
|
{
|
|
case 0: // address port
|
|
write_address(data);
|
|
break;
|
|
|
|
case 1: // data port
|
|
write_data(data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// generate - generate one sample of sound
|
|
//-------------------------------------------------
|
|
|
|
void ym2414::generate(output_data *output, uint32_t numsamples)
|
|
{
|
|
for (uint32_t samp = 0; samp < numsamples; samp++, output++)
|
|
{
|
|
// clock the system
|
|
m_fm.clock(fm_engine::ALL_CHANNELS);
|
|
|
|
// update the FM content; YM2414 is full 14-bit with no intermediate clipping
|
|
m_fm.output(output->clear(), 0, 32767, fm_engine::ALL_CHANNELS);
|
|
|
|
// unsure about YM2414 outputs; assume it is like YM2151
|
|
output->roundtrip_fp();
|
|
}
|
|
}
|
|
|
|
}
|