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a97718f3b3
sound/cf61909.cpp: Added Texas Instruments CF61909 sound chip device. New working systems ---------- Noise Toys Inc. Jaminator [Devin Acker] New working software list items ---------- jaminator.xml: Classic Rock I (USA), Classic Rock II (USA), Hard Rock I (USA), Hard Rock II (USA), Lead Rock Guitarists (USA), Modern Rock (USA) [Devin Acker]
64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
// license: BSD-3-Clause
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// copyright-holders: Devin Acker
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#ifndef MAME_SOUND_CF61909_H
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#define MAME_SOUND_CF61909_H
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#pragma once
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#include "machine/clock.h"
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#include "dirom.h"
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#include <array>
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class cf61909_device : public device_t, public device_sound_interface, public device_rom_interface<18>
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{
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public:
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cf61909_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
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u8 read(offs_t offset);
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void write(offs_t offset, u8 data);
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int sync_r() { return m_sample_clock->signal_r(); }
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protected:
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virtual void device_add_mconfig(machine_config &config) override;
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_clock_changed() override;
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virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
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virtual void rom_bank_pre_change() override;
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private:
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/*
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* Jaminator patent specifies 11.127 kHz sample rate, but the real thing sounds like it has 4x
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* oversampling. The sync clock output (m_sample_clock) seems to fluctuate quite a bit, but
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* 11.127 kHz is pretty close to average.
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*/
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static constexpr unsigned CLOCKS_PER_SAMPLE = 247; // based on 11 MHz clock
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struct voice_t
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{
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u8 m_regs[16] = {0};
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u32 m_start = 0;
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u16 m_loop = 0;
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u16 m_pos = 0;
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u16 m_pitch = 0;
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u16 m_pitch_counter = 0;
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u8 m_volume = 0;
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};
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std::array<voice_t, 8> m_voice;
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u32 m_data_offset;
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required_device<clock_device> m_sample_clock;
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sound_stream *m_stream;
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};
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DECLARE_DEVICE_TYPE(CF61909, cf61909_device)
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#endif // MAME_SOUND_CF61909_H
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