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Kss_Emu.h
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Kss_Emu.h
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// MSX computer KSS music file emulator
// Game_Music_Emu 0.5.5
#ifndef KSS_EMU_H
#define KSS_EMU_H
#include "Classic_Emu.h"
#include "Kss_Scc_Apu.h"
#include "Kss_Cpu.h"
#include "Sms_Apu.h"
#include "Ay_Apu.h"
class Kss_Emu : private Kss_Cpu, public Classic_Emu {
typedef Kss_Cpu cpu;
public:
// KSS file header
enum { header_size = 0x10 };
struct header_t
{
byte tag [4];
byte load_addr [2];
byte load_size [2];
byte init_addr [2];
byte play_addr [2];
byte first_bank;
byte bank_mode;
byte extra_header;
byte device_flags;
};
enum { ext_header_size = 0x10 };
struct ext_header_t
{
byte data_size [4];
byte unused [4];
byte first_track [2];
byte last_tack [2];
byte psg_vol;
byte scc_vol;
byte msx_music_vol;
byte msx_audio_vol;
};
struct composite_header_t : header_t, ext_header_t { };
// Header for currently loaded file
composite_header_t const& header() const { return header_; }
static gme_type_t static_type() { return gme_kss_type; }
public:
Kss_Emu();
~Kss_Emu();
protected:
blargg_err_t track_info_( track_info_t*, int track ) const;
blargg_err_t load_( Data_Reader& );
blargg_err_t start_track_( int );
blargg_err_t run_clocks( blip_time_t&, int );
void set_tempo_( double );
void set_voice( int, Blip_Buffer*, Blip_Buffer*, Blip_Buffer* );
void update_eq( blip_eq_t const& );
void unload();
private:
Rom_Data<page_size> rom;
composite_header_t header_;
bool scc_accessed;
bool gain_updated;
void update_gain();
unsigned scc_enabled; // 0 or 0xC000
byte const* bank_data;
int bank_count;
void set_bank( int logical, int physical );
blargg_long bank_size() const { return (16 * 1024L) >> (header_.bank_mode >> 7 & 1); }
blip_time_t play_period;
blip_time_t next_play;
int ay_latch;
friend void kss_cpu_out( class Kss_Cpu*, cpu_time_t, unsigned addr, int data );
friend int kss_cpu_in( class Kss_Cpu*, cpu_time_t, unsigned addr );
void cpu_write( unsigned addr, int data );
friend void kss_cpu_write( class Kss_Cpu*, unsigned addr, int data );
// large items
enum { mem_size = 0x10000 };
byte ram [mem_size + cpu_padding];
Ay_Apu ay;
Scc_Apu scc;
Sms_Apu* sn;
byte unmapped_read [0x100];
byte unmapped_write [page_size];
};
#endif

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