// license:BSD-3-Clause
// copyright-holders:Alex Marshall,nimitz,austere
#ifndef MAME_SOUND_ICS2115_H
#define MAME_SOUND_ICS2115_H
#pragma once
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_ICS2115_ADD(_tag, _clock) \
MCFG_DEVICE_ADD(_tag, ICS2115, _clock)
#define MCFG_ICS2115_IRQ_CB(_devcb) \
downcast<ics2115_device &>(*device).set_irq_callback(DEVCB_##_devcb);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> ics2115_device
class ics2115_device : public device_t, public device_sound_interface
{
public:
// construction/destruction
ics2115_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template <class Object> devcb_base &set_irq_callback(Object &&cb) { return m_irq_cb.set_callback(std::forward<Object>(cb)); }
DECLARE_READ8_MEMBER(read);
DECLARE_WRITE8_MEMBER(write);
//uint8_t read(offs_t offset);
//void write(offs_t offset, uint8_t data);
TIMER_CALLBACK_MEMBER(timer_cb_0);
TIMER_CALLBACK_MEMBER(timer_cb_1);
protected:
static constexpr uint16_t revision = 0x1;
struct ics2115_voice {
struct {
int32_t left;
uint32_t acc, start, end;
uint16_t fc;
uint8_t ctl, saddr;
} osc;
struct {
int32_t left;
uint32_t add;
uint32_t start, end;
uint32_t acc;
uint16_t regacc;
uint8_t incr;
uint8_t pan, mode;
} vol;
union {
struct {
uint8_t ulaw : 1;
uint8_t stop : 1; //stops wave + vol envelope
uint8_t eightbit : 1;
uint8_t loop : 1;
uint8_t loop_bidir : 1;
uint8_t irq : 1;
uint8_t invert : 1;
uint8_t irq_pending: 1;
//IRQ on variable?
} bitflags;
uint8_t value;
} osc_conf;
union {
struct {
uint8_t done : 1; //indicates ramp has stopped
uint8_t stop : 1; //stops the ramp
uint8_t rollover : 1; //rollover (TODO)
uint8_t loop : 1;
uint8_t loop_bidir : 1;
uint8_t irq : 1; //enable IRQ generation
uint8_t invert : 1; //invert direction
uint8_t irq_pending: 1; //(read only) IRQ pending
//noenvelope == (done | disable)
} bitflags;
uint8_t value;
} vol_ctrl;
//Possibly redundant state. => improvements of wavetable logic
//may lead to its elimination.
union {
struct {
uint8_t on : 1;
uint8_t ramp : 7; // 100 0000 = 0x40 maximum
} bitflags;
uint8_t value;
} state;
bool playing();
int update_volume_envelope();
int update_oscillator();
void update_ramp();
};
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// internal callbacks
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
//internal register helper functions
uint16_t reg_read();
void reg_write(uint8_t data, bool msb);
void recalc_timer(int timer);
void keyon();
void recalc_irq();
//stream helper functions
int fill_output(ics2115_voice& voice, stream_sample_t *outputs[2], int samples);
stream_sample_t get_sample(ics2115_voice& voice);
sound_stream *m_stream;
// internal state
required_region_ptr<uint8_t> m_rom;
devcb_write_line m_irq_cb;
int16_t m_ulaw[256];
uint16_t m_volume[4096];
static const int volume_bits = 15;
ics2115_voice m_voice[32];
struct {
uint8_t scale, preset;
emu_timer *timer;
uint64_t period; /* in nsec */
} m_timer[2];
uint8_t m_active_osc;
uint8_t m_osc_select;
uint8_t m_reg_select;
uint8_t m_irq_enabled, m_irq_pending;
bool m_irq_on;
//Unknown variable, seems to be effected by 0x12. Further investigation
//Required.
uint8_t m_vmode;
};
// device type definition
DECLARE_DEVICE_TYPE(ICS2115, ics2115_device)
#endif // MAME_SOUND_ICS2115_H