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// license:BSD-3-Clause
// copyright-holders:Charles MacDonald
#ifndef MAME_SOUND_C6280_H
#define MAME_SOUND_C6280_H
#pragma once
class c6280_device : public device_t, public device_sound_interface
{
public:
static constexpr feature_type imperfect_features() { return feature::SOUND; } // Incorrect / Not verified noise / LFO output
c6280_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
// write only
void c6280_w(offs_t offset, uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_clock_changed() override;
// sound stream update overrides
virtual void sound_stream_update_legacy(sound_stream &stream, stream_sample_t const * const *inputs, stream_sample_t * const *outputs, int samples) override;
private:
struct channel {
u16 frequency;
u8 control;
u8 balance;
u8 waveform[32];
u8 index;
s16 dda;
u8 noise_control;
s32 noise_counter;
u32 noise_frequency;
u32 noise_seed;
s32 tick;
};
// internal state
sound_stream *m_stream;
u8 m_select;
u8 m_balance;
u8 m_lfo_frequency;
u8 m_lfo_control;
channel m_channel[8];
s16 m_volume_table[32];
};
DECLARE_DEVICE_TYPE(C6280, c6280_device)
#endif // MAME_SOUND_C6280_H
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