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#pragma once
#ifndef __OKIM6258_H__
#define __OKIM6258_H__
#define FOSC_DIV_BY_1024 0
#define FOSC_DIV_BY_768 1
#define FOSC_DIV_BY_512 2
#define TYPE_3BITS 0
#define TYPE_4BITS 1
#define OUTPUT_10BITS 10
#define OUTPUT_12BITS 12
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_OKIM6258_ADD(_tag, _clock) \
MCFG_DEVICE_ADD(_tag, OKIM6258, _clock)
#define MCFG_OKIM6258_REPLACE(_tag, _clock) \
MCFG_DEVICE_REPLACE(_tag, OKIM6258, _clock)
#define MCFG_OKIM6258_DIVIDER(_div) \
okim6258_device::set_start_div(*device, _div);
#define MCFG_OKIM6258_ADPCM_TYPE(_type) \
okim6258_device::set_type(*device, _type);
#define MCFG_OKIM6258_OUT_BITS(_bits) \
okim6258_device::set_outbits(*device, _bits);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> okim6258_device
class okim6258_device : public device_t,
public device_sound_interface
{
public:
okim6258_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~okim6258_device() { }
// static configuration
static void set_start_div(device_t &device, int div) { downcast<okim6258_device &>(device).m_start_divider = div; }
static void set_type(device_t &device, int type) { downcast<okim6258_device &>(device).m_adpcm_type = type; }
static void set_outbits(device_t &device, int outbit) { downcast<okim6258_device &>(device).m_output_bits = outbit; }
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);
public:
DECLARE_READ8_MEMBER( okim6258_status_r );
DECLARE_WRITE8_MEMBER( okim6258_data_w );
DECLARE_WRITE8_MEMBER( okim6258_ctrl_w );
public:
void set_divider(int val);
void set_clock(int val);
int get_vclk();
private:
void okim6258_state_save_register();
INT16 clock_adpcm(UINT8 nibble);
private:
UINT8 m_status;
UINT32 m_master_clock; /* master clock frequency */
UINT32 m_start_divider;
UINT32 m_divider; /* master clock divider */
UINT8 m_adpcm_type; /* 3/4 bit ADPCM select */
UINT8 m_data_in; /* ADPCM data-in register */
UINT8 m_nibble_shift; /* nibble select */
sound_stream *m_stream; /* which stream are we playing on? */
UINT8 m_output_bits; /* D/A precision is 10-bits but 12-bit data can be
output serially to an external DAC */
INT32 m_signal;
INT32 m_step;
};
extern const device_type OKIM6258;
#endif /* __OKIM6258_H__ */
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