// license:BSD-3-Clause // copyright-holders:Acho A. Tang,R. Belmont /********************************************************* Irem GA20 PCM Sound Chip *********************************************************/ #pragma once #ifndef __IREMGA20_H__ #define __IREMGA20_H__ //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_IREMGA20_ADD(_tag, _clock) \ MCFG_DEVICE_ADD(_tag, IREMGA20, _clock) #define MCFG_IREMGA20_REPLACE(_tag, _clock) \ MCFG_DEVICE_REPLACE(_tag, IREMGA20, _clock) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** struct IremGA20_channel_def { UINT32 rate; UINT32 size; UINT32 start; UINT32 pos; UINT32 frac; UINT32 end; UINT32 volume; UINT32 pan; UINT32 effect; UINT32 play; }; // ======================> iremga20_device class iremga20_device : public device_t, public device_sound_interface { public: iremga20_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); ~iremga20_device() { } protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // sound stream update overrides virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override; public: DECLARE_WRITE8_MEMBER( irem_ga20_w ); DECLARE_READ8_MEMBER( irem_ga20_r ); private: void iremga20_reset(); private: UINT8 *m_rom; INT32 m_rom_size; sound_stream *m_stream; UINT16 m_regs[0x40]; IremGA20_channel_def m_channel[4]; }; extern const device_type IREMGA20; #endif /* __IREMGA20_H__ */