// license:BSD-3-Clause // copyright-holders:Joseph Zbiciak,Tim Lindner /********************************************************************** SP0256 Narrator Speech Processor emulation ********************************************************************** _____ _____ Vss 1 |* \_/ | 28 OSC 2 _RESET 2 | | 27 OSC 1 ROM DISABLE 3 | | 26 ROM CLOCK C1 4 | | 25 _SBY RESET C2 5 | | 24 DIGITAL OUT C3 6 | | 23 Vdi Vdd 7 | SP0256 | 22 TEST SBY 8 | | 21 SER IN _LRQ 9 | | 20 _ALD A8 10 | | 19 SE A7 11 | | 18 A1 SER OUT 12 | | 17 A2 A6 13 | | 16 A3 A5 14 |_____________| 15 A4 **********************************************************************/ /* GI SP0256 Narrator Speech Processor By Joe Zbiciak. Ported to MESS by tim lindner. */ #pragma once #ifndef __SP0256_H__ #define __SP0256_H__ #define MCFG_SP0256_DATA_REQUEST_CB(_devcb) \ devcb = &sp0256_device::set_data_request_callback(*device, DEVCB_##_devcb); #define MCFG_SP0256_STANDBY_CB(_devcb) \ devcb = &sp0256_device::set_standby_callback(*device, DEVCB_##_devcb); struct lpc12_t { int rpt, cnt; /* Repeat counter, Period down-counter. */ UINT32 per, rng; /* Period, Amplitude, Random Number Generator */ int amp; INT16 f_coef[6]; /* F0 through F5. */ INT16 b_coef[6]; /* B0 through B5. */ INT16 z_data[6][2]; /* Time-delay data for the filter stages. */ UINT8 r[16]; /* The encoded register set. */ int interp; }; class sp0256_device : public device_t, public device_sound_interface { public: sp0256_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); ~sp0256_device() { } template static devcb_base &set_data_request_callback(device_t &device, _Object object) { return downcast(device).m_drq_cb.set_callback(object); } template static devcb_base &set_standby_callback(device_t &device, _Object object) { return downcast(device).m_sby_cb.set_callback(object); } DECLARE_WRITE8_MEMBER(ald_w); DECLARE_READ_LINE_MEMBER(lrq_r); DECLARE_READ_LINE_MEMBER(sby_r); DECLARE_READ16_MEMBER(spb640_r); DECLARE_WRITE16_MEMBER(spb640_w); TIMER_CALLBACK_MEMBER(set_lrq_timer_proc); void set_clock(int clock); void bitrevbuff(UINT8 *buffer, unsigned int start, unsigned int length); 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; private: UINT32 getb(int len); void micro(); required_region_ptr m_rom; /* 64K ROM. */ sound_stream *m_stream; /* MAME core sound stream */ devcb_write_line m_drq_cb; /* Data request callback */ devcb_write_line m_sby_cb; /* Standby callback */ int m_sby_line; /* Standby line state */ int m_cur_len; /* Fullness of current sound buffer. */ int m_silent; /* Flag: SP0256 is silent. */ std::unique_ptr m_scratch; /* Scratch buffer for audio. */ UINT32 m_sc_head; /* Head pointer into scratch circular buf */ UINT32 m_sc_tail; /* Tail pointer into scratch circular buf */ struct lpc12_t m_filt; /* 12-pole filter */ int m_lrq; /* Load ReQuest. == 0 if we can accept a load */ int m_ald; /* Address LoaD. < 0 if no command pending. */ int m_pc; /* Microcontroller's PC value. */ int m_stack; /* Microcontroller's PC stack. */ int m_fifo_sel; /* True when executing from FIFO. */ int m_halted; /* True when CPU is halted. */ UINT32 m_mode; /* Mode register. */ UINT32 m_page; /* Page set by SETPAGE */ UINT32 m_fifo_head; /* FIFO head pointer (where new data goes). */ UINT32 m_fifo_tail; /* FIFO tail pointer (where data comes from). */ UINT32 m_fifo_bitp; /* FIFO bit-pointer (for partial decles). */ UINT16 m_fifo[64]; /* The 64-decle FIFO. */ emu_timer *m_lrq_timer; }; extern const device_type SP0256; #endif /* __SP0256_H__ */