132 lines
2.8 KiB
C++
Executable File
132 lines
2.8 KiB
C++
Executable File
#ifndef _higan_smp_h_
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#define _higan_smp_h_
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#include "blargg_common.h"
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#include "../processor/spc700/spc700.hpp"
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#include "../dsp/dsp.hpp"
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namespace SuperFamicom {
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struct SMP : Processor::SPC700 {
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long clock;
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uint8_t iplrom[64];
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uint8_t apuram[64 * 1024];
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int64_t dsp_clock_step;
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SuperFamicom::DSP dsp;
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inline void step(unsigned clocks);
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inline void synchronize_dsp();
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uint8_t port_read(uint8_t port) const;
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void port_write(uint8_t port, uint8_t data);
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void enter();
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void power();
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void reset();
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void set_tempo(double);
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void render(int16_t * buffer, unsigned count);
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void skip(unsigned count);
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uint8_t sfm_last[4];
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private:
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uint8_t const* sfm_queue;
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uint8_t const* sfm_queue_end;
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uint8_t const* sfm_queue_repeat;
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public:
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void set_sfm_queue(const uint8_t* queue, const uint8_t* queue_end, const uint8_t* queue_repeat);
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const uint8_t* get_sfm_queue() const;
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size_t get_sfm_queue_remain() const;
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private:
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int16_t * sample_buffer;
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int16_t const* sample_buffer_end;
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public:
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bool sample( int16_t, int16_t );
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SMP();
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~SMP();
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struct {
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//timing
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unsigned clock_counter;
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unsigned dsp_counter;
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unsigned timer_step;
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//$00f0
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uint8_t clock_speed;
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uint8_t timer_speed;
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bool timers_enable;
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bool ram_disable;
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bool ram_writable;
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bool timers_disable;
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//$00f1
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bool iplrom_enable;
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//$00f2
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uint8_t dsp_addr;
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//$00f8,$00f9
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uint8_t ram00f8;
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uint8_t ram00f9;
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} status;
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friend class SMPcore;
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//memory.cpp
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uint8_t ram_read(uint16_t addr);
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void ram_write(uint16_t addr, uint8_t data);
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uint8_t op_busread(uint16_t addr);
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void op_buswrite(uint16_t addr, uint8_t data);
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void op_io();
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uint8_t op_read(uint16_t addr);
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void op_write(uint16_t addr, uint8_t data);
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uint8_t disassembler_read(uint16_t addr);
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//timing.cpp
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template<unsigned frequency>
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struct Timer {
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SMP &smp;
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uint8_t stage0_ticks;
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uint8_t stage1_ticks;
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uint8_t stage2_ticks;
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uint8_t stage3_ticks;
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bool current_line;
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bool enable;
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uint8_t target;
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Timer(SMP &p_smp) : smp( p_smp ) { }
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void tick();
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void synchronize_stage1();
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};
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Timer<192> timer0;
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Timer<192> timer1;
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Timer< 24> timer2;
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inline void add_clocks(unsigned clocks);
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inline void cycle_edge();
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};
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inline void SMP::set_tempo(double speed) { dsp_clock_step = (int64_t)(4096.0 / speed); }
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inline void SMP::set_sfm_queue(const uint8_t *queue, const uint8_t *queue_end, const uint8_t *queue_repeat) { sfm_queue = queue; sfm_queue_end = queue_end; sfm_queue_repeat = queue_repeat; sfm_last[0] = 0; sfm_last[1] = 0; sfm_last[2] = 0; sfm_last[3] = 0; }
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inline const uint8_t* SMP::get_sfm_queue() const { return sfm_queue; }
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inline size_t SMP::get_sfm_queue_remain() const { return sfm_queue_end - sfm_queue; }
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};
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#endif
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