// license:BSD-3-Clause // copyright-holders:Alex Marshall,nimitz,austere #pragma once #ifndef __ICS2115_H__ #define __ICS2115_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_ICS2115_ADD(_tag, _clock) \ MCFG_DEVICE_ADD(_tag, ICS2115, _clock) #define MCFG_ICS2115_IRQ_CB(_devcb) \ devcb = &ics2115_device::set_irq_callback(*device, DEVCB_##_devcb); //************************************************************************** // TYPE DEFINITIONS //************************************************************************** struct ics2115_voice { struct { INT32 left; UINT32 acc, start, end; UINT16 fc; UINT8 ctl, saddr; } osc; struct { INT32 left; UINT32 add; UINT32 start, end; UINT32 acc; UINT16 regacc; UINT8 incr; UINT8 pan, mode; } vol; union { struct { UINT8 ulaw : 1; UINT8 stop : 1; //stops wave + vol envelope UINT8 eightbit : 1; UINT8 loop : 1; UINT8 loop_bidir : 1; UINT8 irq : 1; UINT8 invert : 1; UINT8 irq_pending: 1; //IRQ on variable? } bitflags; UINT8 value; } osc_conf; union { struct { UINT8 done : 1; //indicates ramp has stopped UINT8 stop : 1; //stops the ramp UINT8 rollover : 1; //rollover (TODO) UINT8 loop : 1; UINT8 loop_bidir : 1; UINT8 irq : 1; //enable IRQ generation UINT8 invert : 1; //invert direction UINT8 irq_pending: 1; //(read only) IRQ pending //noenvelope == (done | disable) } bitflags; UINT8 value; } vol_ctrl; //Possibly redundant state. => improvements of wavetable logic //may lead to its elimination. union { struct { UINT8 on : 1; UINT8 ramp : 7; // 100 0000 = 0x40 maximum } bitflags; UINT8 value; } state; bool playing(); int update_volume_envelope(); int update_oscillator(); void update_ramp(); }; // ======================> 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 clock); template static devcb_base &set_irq_callback(device_t &device, _Object object) { return downcast(device).m_irq_cb.set_callback(object); } DECLARE_READ8_MEMBER(read); DECLARE_WRITE8_MEMBER(write); //UINT8 read(offs_t offset); //void write(offs_t offset, UINT8 data); TIMER_CALLBACK_MEMBER(timer_cb_0); TIMER_CALLBACK_MEMBER(timer_cb_1); sound_stream *m_stream; static const UINT16 revision = 0x1; protected: // 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 state required_region_ptr m_rom; devcb_write_line m_irq_cb; INT16 m_ulaw[256]; UINT16 m_volume[4096]; static const int volume_bits = 15; ics2115_voice m_voice[32]; struct { UINT8 scale, preset; emu_timer *timer; UINT64 period; /* in nsec */ } m_timer[2]; UINT8 m_active_osc; UINT8 m_osc_select; UINT8 m_reg_select; UINT8 m_irq_enabled, m_irq_pending; bool m_irq_on; //Unknown variable, seems to be effected by 0x12. Further investigation //Required. UINT8 m_vmode; //internal register helper functions UINT16 reg_read(); void reg_write(UINT8 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); }; // device type definition extern const device_type ICS2115; #endif /* __ICS2115_H__ */