void emu_init(char* args){
hal_init();
// mem_init();
// init the ppu before rom otherwise set_mirroring will not work
ppu_init();
rom_init();
readrom(args);
cpu_init(&cpu);
cpu_reset(&cpu);
emu_running = true;
}
void emulator_load(const char *rom)
{
ines_unloadrom();
ines_loadrom(rom);
mapper_make_current(c_rom->mapper);
mapper_reset();
cpu_init();
ppu_init();
papu_init(EMULATOR_DEF_SOUND_SAMLE_RATE, EMULATOR_DEF_SOUND_DURATION);
emulator_last_tick = 0;
}
void exec_loop(){
mem_init();
rom_init();
readrom("nestest.nes");
cpu_init(&cpu);
cpu_reset(&cpu);
ppu_init();
cpu_exec(&cpu,18);
cpu_trigger_nmi(&cpu);
cpu_exec(&cpu,30);
//check for interrupts
//mem_dump(mem,8);
//test = 0;
//printf("test = %d",test);
}
// 函数实现
BOOL nes_init(NES *nes, char *file, DWORD extra)
{
int *mirroring = NULL;
int i = 0;
log_init("DEBUGER"); // log init
// clear it
memset(nes, 0, sizeof(NES));
// extra data
nes->extra = extra;
// load cartridge first
if (!cartridge_load(&(nes->cart), file))
{
log_printf("failed to load nes rom file !\n");
}
//++ cbus mem map ++//
// create cpu ram
nes->cram.type = MEM_RAM;
nes->cram.size = NES_CRAM_SIZE;
nes->cram.data = nes->cpu.cram;
// create ppu regs
nes->ppuregs.type = MEM_REG;
nes->ppuregs.size = NES_PPUREGS_SIZE;
nes->ppuregs.data = nes->ppu.regs;
nes->ppuregs.r_callback = NES_PPU_REG_RCB;
nes->ppuregs.w_callback = NES_PPU_REG_WCB;
// create apu regs
nes->apuregs.type = MEM_REG;
nes->apuregs.size = NES_APUREGS_SIZE;
nes->apuregs.data = nes->apu.regs;
nes->apuregs.r_callback = NES_APU_REG_RCB;
nes->apuregs.w_callback = NES_APU_REG_WCB;
// create expansion rom
nes->erom.type = MEM_ROM;
nes->erom.size = NES_EROM_SIZE;
nes->erom.data = nes->buf_erom;
// create sram
nes->sram.type = MEM_RAM;
nes->sram.size = NES_SRAM_SIZE;
nes->sram.data = nes->cart.buf_sram;
// create PRG-ROM 0
nes->prom0.type = MEM_ROM;
nes->prom0.size = NES_PRGROM_SIZE;
// create PRG-ROM 1
nes->prom1.type = MEM_ROM;
nes->prom1.size = NES_PRGROM_SIZE;
// init nes cbus
bus_setmem(nes->cbus, 0, 0xC000, 0xFFFF, &(nes->prom1 ));
bus_setmem(nes->cbus, 1, 0x8000, 0xBFFF, &(nes->prom0 ));
bus_setmem(nes->cbus, 2, 0x6000, 0x7FFF, &(nes->sram ));
bus_setmem(nes->cbus, 3, 0x4020, 0x5FFF, &(nes->erom ));
bus_setmem(nes->cbus, 4, 0x4000, 0x401F, &(nes->apuregs));
bus_setmem(nes->cbus, 5, 0x2000, 0x3FFF, &(nes->ppuregs));
bus_setmem(nes->cbus, 6, 0x0000, 0x1FFF, &(nes->cram ));
//-- cbus mem map --//
//++ pbus mem map ++//
// create CHR-ROM0
nes->chrrom0.type = MEM_ROM;
nes->chrrom0.size = NES_CHRROM_SIZE;
// create CHR-ROM1
nes->chrrom1.type = MEM_ROM;
nes->chrrom1.size = NES_CHRROM_SIZE;
// create vram
mirroring = cartridge_get_vram_mirroring(&(nes->cart));
for (i=0; i<4; i++)
{
nes->vram[i].type = MEM_RAM;
nes->vram[i].size = NES_VRAM_SIZE;
nes->vram[i].data = nes->buf_vram[mirroring[i]];
}
// create color palette
nes->palette.type = MEM_RAM;
nes->palette.size = NES_PALETTE_SIZE;
nes->palette.data = nes->ppu.palette;
// init nes pbus
bus_setmir(nes->pbus, 0, 0x3F20, 0x3FFF, 0x3F1F);
bus_setmem(nes->pbus, 1, 0x3F00, 0x3F1F, &(nes->palette));
bus_setmir(nes->pbus, 2, 0x3000, 0x3EFF, 0x2FFF);
bus_setmem(nes->pbus, 3, 0x2C00, 0x2FFF, &(nes->vram[3]));
bus_setmem(nes->pbus, 4, 0x2800, 0x2BFF, &(nes->vram[2]));
bus_setmem(nes->pbus, 5, 0x2400, 0x27FF, &(nes->vram[1]));
bus_setmem(nes->pbus, 6, 0x2000, 0x23FF, &(nes->vram[0]));
bus_setmem(nes->pbus, 7, 0x1000, 0x1FFF, &(nes->chrrom1));
bus_setmem(nes->pbus, 8, 0x0000, 0x0FFF, &(nes->chrrom0));
//-- pbus mem map --//
// init mmc before cpu & ppu & apu, due to mmc will do bank switch
// this will change memory mapping on cbus & pbus
mmc_init(&(nes->mmc), &(nes->cart), nes->cbus, nes->pbus);
// now it's time to init cpu & ppu & apu
cpu_init(&(nes->cpu), nes->cbus );
ppu_init(&(nes->ppu), nes->extra, NULL);
apu_init(&(nes->apu), nes->extra, NULL);
ndb_init(&(nes->ndb), nes );
// init joypad
joypad_init (&(nes->pad));
joypad_setkey(&(nes->pad), 0, NES_PAD_CONNECT, 1);
joypad_setkey(&(nes->pad), 1, NES_PAD_CONNECT, 1);
// init replay
replay_init(&(nes->replay));
// create nes event & thread
pthread_create(&(nes->thread_id), NULL, nes_thread_proc, nes);
return TRUE;
}
void emulator_reset()
{
cpu_init();
ppu_init();
papu_init(EMULATOR_DEF_SOUND_SAMLE_RATE, EMULATOR_DEF_SOUND_DURATION);
}
// 函数实现
BOOL nes_init(NES *nes, char *file, DWORD extra)
{
int *mirroring = NULL;
int i = 0;
log_init("DEBUGER");
// clear it
memset(nes, 0, sizeof(NES));
// extra data
nes->extra = extra;
// load cartridge first
if (!cartridge_load(&(nes->cart), file)) {
return FALSE;
}
//++ cbus mem map ++//
// create cpu ram
nes->cram.type = MEM_RAM;
nes->cram.size = NES_CRAM_SIZE;
nes->cram.data = nes->cpu.cram;
// create ppu regs
nes->ppuregs.type = MEM_REG;
nes->ppuregs.size = NES_PPUREGS_SIZE;
nes->ppuregs.data = nes->ppu.regs;
nes->ppuregs.r_callback = NES_PPU_REG_RCB;
nes->ppuregs.w_callback = NES_PPU_REG_WCB;
// create apu regs
nes->apuregs.type = MEM_REG;
nes->apuregs.size = NES_APUREGS_SIZE;
nes->apuregs.data = nes->apu.regs;
nes->apuregs.r_callback = NES_APU_REG_RCB;
nes->apuregs.w_callback = NES_APU_REG_WCB;
// create pad regs
nes->padregs.type = MEM_REG;
nes->padregs.size = NES_PADREGS_SIZE;
nes->padregs.data = nes->pad.regs;
nes->padregs.r_callback = NES_PAD_REG_RCB;
nes->padregs.w_callback = NES_PAD_REG_WCB;
// create expansion rom
nes->erom.type = MEM_ROM;
nes->erom.size = NES_EROM_SIZE;
nes->erom.data = nes->buf_erom;
// create sram
nes->sram.type = MEM_RAM;
nes->sram.size = NES_SRAM_SIZE;
nes->sram.data = nes->cart.buf_sram;
// create PRG-ROM 0
nes->prgrom0.type = MEM_ROM;
nes->prgrom0.size = NES_PRGROM_SIZE;
nes->prgrom0.data = nes->cart.buf_prom;
// create PRG-ROM 1
nes->prgrom1.type = MEM_ROM;
nes->prgrom1.size = NES_PRGROM_SIZE;
nes->prgrom1.data = nes->cart.buf_prom;
if (nes->cart.prom_count > 1) {
nes->prgrom1.data += NES_PRGROM_SIZE;
}
// init nes cbus
bus_setmem(nes->cbus, 0, 0x0000, 0x1FFF, &(nes->cram ));
bus_setmem(nes->cbus, 1, 0x2000, 0x3FFF, &(nes->ppuregs));
bus_setmem(nes->cbus, 2, 0x4000, 0x4015, &(nes->apuregs));
bus_setmem(nes->cbus, 3, 0x4016, 0x401F, &(nes->padregs));
bus_setmem(nes->cbus, 4, 0x4020, 0x5FFF, &(nes->erom ));
bus_setmem(nes->cbus, 5, 0x6000, 0x7FFF, &(nes->sram ));
bus_setmem(nes->cbus, 6, 0x8000, 0xBFFF, &(nes->prgrom0));
bus_setmem(nes->cbus, 7, 0xC000, 0xFFFF, &(nes->prgrom1));
bus_setmem(nes->cbus, 8, 0x0000, 0x0000, NULL );
//-- cbus mem map --//
//++ pbus mem map ++//
// create pattern table #0
nes->pattab0.type = MEM_ROM;
nes->pattab0.size = NES_PATTAB_SIZE;
nes->pattab0.data = nes->cart.buf_crom + NES_PATTAB_SIZE * 0;
// create pattern table #1
nes->pattab1.type = MEM_ROM;
nes->pattab1.size = NES_PATTAB_SIZE;
nes->pattab1.data = nes->cart.buf_crom + NES_PATTAB_SIZE * 1;
// create vram
mirroring = cartridge_get_vram_mirroring(&(nes->cart));
for (i=0; i<4; i++)
{
nes->vram[i].type = MEM_RAM;
nes->vram[i].size = NES_VRAM_SIZE;
nes->vram[i].data = nes->buf_vram[mirroring[i]];
}
// create color palette
nes->palette.type = MEM_RAM;
nes->palette.size = NES_PALETTE_SIZE;
nes->palette.data = nes->ppu.palette;
// init nes pbus
bus_setmir(nes->pbus, 0, 0x3000, 0x3EFF, 0x2FFF);
bus_setmir(nes->pbus, 1, 0x3F00, 0x3FFF, 0x3F1F);
bus_setmem(nes->pbus, 2, 0x0000, 0x0FFF, &(nes->pattab0));
bus_setmem(nes->pbus, 3, 0x1000, 0x1FFF, &(nes->pattab1));
bus_setmem(nes->pbus, 4, 0x2000, 0x23FF, &(nes->vram[0]));
bus_setmem(nes->pbus, 5, 0x2400, 0x27FF, &(nes->vram[1]));
bus_setmem(nes->pbus, 6, 0x2800, 0x2BFF, &(nes->vram[2]));
bus_setmem(nes->pbus, 7, 0x2C00, 0x2FFF, &(nes->vram[3]));
// palette
// 0x3F00 - 0x3F0F: image palette
// 0x3F10 - 0x3F1F: sprite palette
// 0x3F00, 0x3F04, 0x3F08, 0x3F0C, 0x3F10, 0x3F14, 0x3F18, 0x3F1C mirring and store the background color
bus_setmem(nes->pbus, 8, 0x3F00, 0x3F1F, &(nes->palette));
bus_setmem(nes->pbus, 9, 0x0000, 0x0000, NULL );
//-- pbus mem map --//
joypad_init (&(nes->pad));
joypad_setkey(&(nes->pad), 0, NES_PAD_CONNECT, 1);
joypad_setkey(&(nes->pad), 1, NES_PAD_CONNECT, 1);
mmc_init (&(nes->mmc), &(nes->cart), nes->cbus, nes->pbus);
ppu_init (&(nes->ppu), nes->extra);
apu_init (&(nes->apu), nes->extra);
cpu_init (&(nes->cpu), nes->cbus );
// create nes event & thread
nes->hNesEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
nes->hNesThread = CreateThread(NULL, 0, nes_thread_proc, (LPVOID)nes, 0, 0);
return TRUE;
}
