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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/**********************************************************************
NEC uPD1771
**********************************************************************/
#ifndef __UPD1771_H__
#define __UPD1771_H__
#include "emu.h"
#define MAX_PACKET_SIZE 0x8000
#define MCFG_UPD1771_ACK_HANDLER(_devcb) \
devcb = &upd1771c_device::set_ack_handler(*device, DEVCB_##_devcb);
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
class upd1771c_device : public device_t,
public device_sound_interface
{
public:
upd1771c_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~upd1771c_device() {}
template<class _Object> static devcb_base &set_ack_handler(device_t &device, _Object object) { return downcast<upd1771c_device &>(device).m_ack_handler.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
WRITE_LINE_MEMBER( pcm_write );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
private:
// internal state
sound_stream *m_channel;
devcb_write_line m_ack_handler;
emu_timer *m_timer;
TIMER_CALLBACK_MEMBER(ack_callback);
UINT8 m_packet[MAX_PACKET_SIZE];
UINT32 m_index;
UINT8 m_expected_bytes;
UINT8 m_state;//0:silence, 1 noise, 2 tone
UINT8 m_pc3;
//tone
UINT8 m_t_timbre; //[0; 7]
UINT8 m_t_offset; //[0; 32]
UINT16 m_t_period; //[0;255]
UINT8 m_t_volume; //[0; 31]
UINT8 m_t_tpos;//timbre pos
UINT16 m_t_ppos;//period pos
//noise wavetable LFSR
UINT8 m_nw_timbre; //[0; 7]
UINT8 m_nw_volume; //[0; 31]
UINT32 m_nw_period;
UINT32 m_nw_tpos; //timbre pos
UINT32 m_nw_ppos; //period pos
//noise pulse components
UINT8 m_n_value[3]; //[0;1]
UINT16 m_n_volume[3]; //[0; 31]
UINT32 m_n_period[3];
UINT32 m_n_ppos[3]; //period pos
};
extern const device_type UPD1771C;
#endif /* __UPD1771_H__ */
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