Function NSFLoad

src/nsf.cpp:174–299

}

int NSFLoad(const char *name, FCEUFILE *fp)
{
	int x;

	FCEU_fseek(fp,0,SEEK_SET);
	FCEU_fread(&NSFHeader,1,0x80,fp);
	if(memcmp(NSFHeader.ID,"NESM\x1a",5))
		return LOADER_INVALID_FORMAT;
	NSFHeader.SongName[31]=NSFHeader.Artist[31]=NSFHeader.Copyright[31]=0;

	LoadAddr=NSFHeader.LoadAddressLow;
	LoadAddr|=NSFHeader.LoadAddressHigh<<8;

	if(LoadAddr<0x6000)
	{
		FCEUD_PrintError("Invalid load address.");
		return LOADER_HANDLED_ERROR;
	}
	InitAddr=NSFHeader.InitAddressLow;
	InitAddr|=NSFHeader.InitAddressHigh<<8;

	PlayAddr=NSFHeader.PlayAddressLow;
	PlayAddr|=NSFHeader.PlayAddressHigh<<8;

	NSFSize=FCEU_fgetsize(fp)-0x80;

	NSFMaxBank=((NSFSize+(LoadAddr&0xfff)+4095)/4096);
	NSFMaxBank=PRGsize[0]=uppow2(NSFMaxBank);

	if (!(NSFDATA = (uint8 *)FCEU_malloc(NSFMaxBank * 4096)))
	{
		FCEU_PrintError("Unable to allocate memory.");
		return LOADER_HANDLED_ERROR;
	}

	FCEU_fseek(fp,0x80,SEEK_SET);
	memset(NSFDATA,0x00,NSFMaxBank*4096);
	FCEU_fread(NSFDATA+(LoadAddr&0xfff),1,NSFSize,fp);

	NSFMaxBank--;

	BSon=0;
	for(x=0;x<8;x++)
	{
		BSon|=NSFHeader.BankSwitch[x];
	}

	if(BSon==0)
	{
		BankCounter=0x00;

 		if ((NSFHeader.LoadAddressHigh & 0x70) >= 0x70)
		{
			//Ice Climber, and other F000 base address tunes need this
			BSon=0xFF;
		}
		else {
			for(x=(NSFHeader.LoadAddressHigh & 0x70) / 0x10;x<8;x++)