public void InitNSF(NSFFormat nsf)
{
this.nsf = nsf;
//patch the NSF rom with the init and play addresses
NSFROM[0x12] = (byte)(nsf.InitAddress);
NSFROM[0x13] = (byte)(nsf.InitAddress >> 8);
NSFROM[0x19] = (byte)(nsf.PlayAddress);
NSFROM[0x1A] = (byte)(nsf.PlayAddress >> 8);
//analyze bankswitch configuration. fix broken configurations
BankSwitched = false;
for (int i = 0; i < 8; i++)
{
int bank = nsf.BankswitchInitValues[i];
//discard out of range bankswitches.. for example, Balloon Fight is 3120B but has initial bank settings set to 0,0,0,0,0,1,0
if (bank * 4096 > nsf.NSFData.Length - 0x80)
bank = 0;
InitBankSwitches[i] = (byte)bank;
if (bank != 0)
BankSwitched = true;
}
//if bit bankswitched, set up the fake PRG with the NSF data at the correct load address
if (!BankSwitched)
{
//copy to load address
int load_start = nsf.LoadAddress - 0x8000;
int load_size = nsf.NSFData.Length - 0x80;
Buffer.BlockCopy(nsf.NSFData, 0x80, FakePRG, load_start, load_size);
}
ReplayInit();
CurrentSong = nsf.StartingSong;
}
public void Init(GameInfo gameInfo, byte[] rom, byte[] fdsbios = null)
{
LoadReport = new StringWriter();
LoadWriteLine("------");
LoadWriteLine("BEGIN NES rom analysis:");
byte[] file = rom;
Type boardType = null;
CartInfo choice = null;
CartInfo iNesHeaderInfo = null;
CartInfo iNesHeaderInfoV2 = null;
List <string> hash_sha1_several = new List <string>();
string hash_sha1 = null, hash_md5 = null;
Unif unif = null;
Dictionary <string, string> InitialMapperRegisterValues = new Dictionary <string, string>(SyncSettings.BoardProperties);
origin = EDetectionOrigin.None;
if (file.Length < 16)
{
throw new Exception("Alleged NES rom too small to be anything useful");
}
if (file.Take(4).SequenceEqual(System.Text.Encoding.ASCII.GetBytes("UNIF")))
{
unif = new Unif(new MemoryStream(file));
LoadWriteLine("Found UNIF header:");
LoadWriteLine(unif.CartInfo);
LoadWriteLine("Since this is UNIF we can confidently parse PRG/CHR banks to hash.");
hash_sha1 = unif.CartInfo.sha1;
hash_sha1_several.Add(hash_sha1);
LoadWriteLine("headerless rom hash: {0}", hash_sha1);
}
else if (file.Take(5).SequenceEqual(System.Text.Encoding.ASCII.GetBytes("NESM\x1A")))
{
origin = EDetectionOrigin.NSF;
LoadWriteLine("Loading as NSF");
var nsf = new NSFFormat();
nsf.WrapByteArray(file);
cart = new CartInfo();
var nsfboard = new NSFBoard();
nsfboard.Create(this);
nsfboard.ROM = rom;
nsfboard.InitNSF(nsf);
nsfboard.InitialRegisterValues = InitialMapperRegisterValues;
nsfboard.Configure(origin);
nsfboard.WRAM = new byte[cart.wram_size * 1024];
Board = nsfboard;
Board.PostConfigure();
AutoMapperProps.Populate(Board, SyncSettings);
Console.WriteLine("Using NTSC display type for NSF for now");
_display_type = Common.DisplayType.NTSC;
HardReset();
return;
}
else if (file.Take(4).SequenceEqual(System.Text.Encoding.ASCII.GetBytes("FDS\x1A")) ||
file.Take(4).SequenceEqual(System.Text.Encoding.ASCII.GetBytes("\x01*NI")))
{
// danger! this is a different codepath with an early return. accordingly, some
// code is duplicated twice...
// FDS roms are just fed to the board, we don't do much else with them
origin = EDetectionOrigin.FDS;
LoadWriteLine("Found FDS header.");
if (fdsbios == null)
{
throw new MissingFirmwareException("Missing FDS Bios");
}
cart = new CartInfo();
var fdsboard = new FDS();
fdsboard.biosrom = fdsbios;
fdsboard.SetDiskImage(rom);
fdsboard.Create(this);
// at the moment, FDS doesn't use the IRVs, but it could at some point in the future
fdsboard.InitialRegisterValues = InitialMapperRegisterValues;
fdsboard.Configure(origin);
Board = fdsboard;
//create the vram and wram if necessary
if (cart.wram_size != 0)
{
Board.WRAM = new byte[cart.wram_size * 1024];
}
if (cart.vram_size != 0)
{
Board.VRAM = new byte[cart.vram_size * 1024];
}
Board.PostConfigure();
AutoMapperProps.Populate(Board, SyncSettings);
Console.WriteLine("Using NTSC display type for FDS disk image");
_display_type = Common.DisplayType.NTSC;
HardReset();
return;
}
else
{
byte[] nesheader = new byte[16];
Buffer.BlockCopy(file, 0, nesheader, 0, 16);
if (!DetectFromINES(nesheader, out iNesHeaderInfo, out iNesHeaderInfoV2))
{
throw new InvalidOperationException("iNES header not found");
}
//now that we know we have an iNES header, we can try to ignore it.
hash_sha1 = "sha1:" + file.HashSHA1(16, file.Length - 16);
hash_sha1_several.Add(hash_sha1);
hash_md5 = "md5:" + file.HashMD5(16, file.Length - 16);
LoadWriteLine("Found iNES header:");
LoadWriteLine(iNesHeaderInfo.ToString());
if (iNesHeaderInfoV2 != null)
{
LoadWriteLine("Found iNES V2 header:");
LoadWriteLine(iNesHeaderInfoV2);
}
LoadWriteLine("Since this is iNES we can (somewhat) confidently parse PRG/CHR banks to hash.");
LoadWriteLine("headerless rom hash: {0}", hash_sha1);
LoadWriteLine("headerless rom hash: {0}", hash_md5);
if (iNesHeaderInfo.prg_size == 16)
{
//8KB prg can't be stored in iNES format, which counts 16KB prg banks.
//so a correct hash will include only 8KB.
LoadWriteLine("Since this rom has a 16 KB PRG, we'll hash it as 8KB too for bootgod's DB:");
var msTemp = new MemoryStream();
msTemp.Write(file, 16, 8 * 1024); //add prg
msTemp.Write(file, 16 + 16 * 1024, iNesHeaderInfo.chr_size * 1024); //add chr
msTemp.Flush();
var bytes = msTemp.ToArray();
var hash = "sha1:" + bytes.HashSHA1(0, bytes.Length);
LoadWriteLine(" PRG (8KB) + CHR hash: {0}", hash);
hash_sha1_several.Add(hash);
hash = "md5:" + bytes.HashMD5(0, bytes.Length);
LoadWriteLine(" PRG (8KB) + CHR hash: {0}", hash);
}
}
if (USE_DATABASE)
{
if (hash_md5 != null)
{
choice = IdentifyFromGameDB(hash_md5);
}
if (choice == null)
{
choice = IdentifyFromGameDB(hash_sha1);
}
if (choice == null)
{
LoadWriteLine("Could not locate game in bizhawk gamedb");
}
else
{
origin = EDetectionOrigin.GameDB;
LoadWriteLine("Chose board from bizhawk gamedb: " + choice.board_type);
//gamedb entries that dont specify prg/chr sizes can infer it from the ines header
if (iNesHeaderInfo != null)
{
if (choice.prg_size == -1)
{
choice.prg_size = iNesHeaderInfo.prg_size;
}
if (choice.chr_size == -1)
{
choice.chr_size = iNesHeaderInfo.chr_size;
}
if (choice.vram_size == -1)
{
choice.vram_size = iNesHeaderInfo.vram_size;
}
if (choice.wram_size == -1)
{
choice.wram_size = iNesHeaderInfo.wram_size;
}
}
else if (unif != null)
{
if (choice.prg_size == -1)
{
choice.prg_size = unif.CartInfo.prg_size;
}
if (choice.chr_size == -1)
{
choice.chr_size = unif.CartInfo.chr_size;
}
// unif has no wram\vram sizes; hope the board impl can figure it out...
if (choice.vram_size == -1)
{
choice.vram_size = 0;
}
if (choice.wram_size == -1)
{
choice.wram_size = 0;
}
}
}
//if this is still null, we have to try it some other way. nescartdb perhaps?
if (choice == null)
{
choice = IdentifyFromBootGodDB(hash_sha1_several);
if (choice == null)
{
LoadWriteLine("Could not locate game in nescartdb");
}
else
{
LoadWriteLine("Chose board from nescartdb:");
LoadWriteLine(choice);
origin = EDetectionOrigin.BootGodDB;
}
}
}
//if choice is still null, try UNIF and iNES
if (choice == null)
{
if (unif != null)
{
LoadWriteLine("Using information from UNIF header");
choice = unif.CartInfo;
//ok, i have this Q-Boy rom with no VROM and no VRAM.
//we also certainly have games with VROM and no VRAM.
//looks like FCEUX policy is to allocate 8KB of chr ram no matter what UNLESS certain flags are set. but what's the justification for this? please leave a note if you go debugging in it again.
//well, we know we can't have much of a NES game if there's no VROM unless there's VRAM instead.
//so if the VRAM isn't set, choose 8 for it.
//TODO - unif loading code may need to use VROR flag to transform chr_size=8 to vram_size=8 (need example)
if (choice.chr_size == 0 && choice.vram_size == 0)
{
choice.vram_size = 8;
}
//(do we need to suppress this in case theres a CHR rom? probably not. nes board base will use ram if no rom is available)
origin = EDetectionOrigin.UNIF;
}
if (iNesHeaderInfo != null)
{
LoadWriteLine("Attempting inference from iNES header");
// try to spin up V2 header first, then V1 header
if (iNesHeaderInfoV2 != null)
{
try
{
boardType = FindBoard(iNesHeaderInfoV2, origin, InitialMapperRegisterValues);
}
catch { }
if (boardType == null)
{
LoadWriteLine("Failed to load as iNES V2");
}
else
{
choice = iNesHeaderInfoV2;
}
// V2 might fail but V1 might succeed because we don't have most V2 aliases setup; and there's
// no reason to do so except when needed
}
if (boardType == null)
{
choice = iNesHeaderInfo; // we're out of options, really
boardType = FindBoard(iNesHeaderInfo, origin, InitialMapperRegisterValues);
if (boardType == null)
{
LoadWriteLine("Failed to load as iNES V1");
}
// do not further meddle in wram sizes. a board that is being loaded from a "MAPPERxxx"
// entry should know and handle the situation better for the individual board
}
LoadWriteLine("Chose board from iNES heuristics:");
LoadWriteLine(choice);
origin = EDetectionOrigin.INES;
}
}
game_name = choice.name;
//find a INESBoard to handle this
if (choice != null)
{
boardType = FindBoard(choice, origin, InitialMapperRegisterValues);
}
else
{
throw new Exception("Unable to detect ROM");
}
if (boardType == null)
{
throw new Exception("No class implements the necessary board type: " + choice.board_type);
}
if (choice.DB_GameInfo != null)
{
choice.bad = choice.DB_GameInfo.IsRomStatusBad();
}
LoadWriteLine("Final game detection results:");
LoadWriteLine(choice);
LoadWriteLine("\"" + game_name + "\"");
LoadWriteLine("Implemented by: class " + boardType.Name);
if (choice.bad)
{
LoadWriteLine("~~ ONE WAY OR ANOTHER, THIS DUMP IS KNOWN TO BE *BAD* ~~");
LoadWriteLine("~~ YOU SHOULD FIND A BETTER FILE ~~");
}
LoadWriteLine("END NES rom analysis");
LoadWriteLine("------");
Board = CreateBoardInstance(boardType);
cart = choice;
Board.Create(this);
Board.InitialRegisterValues = InitialMapperRegisterValues;
Board.Configure(origin);
if (origin == EDetectionOrigin.BootGodDB)
{
RomStatus = RomStatus.GoodDump;
CoreComm.RomStatusAnnotation = "Identified from BootGod's database";
}
if (origin == EDetectionOrigin.UNIF)
{
RomStatus = RomStatus.NotInDatabase;
CoreComm.RomStatusAnnotation = "Inferred from UNIF header; somewhat suspicious";
}
if (origin == EDetectionOrigin.INES)
{
RomStatus = RomStatus.NotInDatabase;
CoreComm.RomStatusAnnotation = "Inferred from iNES header; potentially wrong";
}
if (origin == EDetectionOrigin.GameDB)
{
if (choice.bad)
{
RomStatus = RomStatus.BadDump;
}
else
{
RomStatus = choice.DB_GameInfo.Status;
}
}
byte[] trainer = null;
//create the board's rom and vrom
if (iNesHeaderInfo != null)
{
var ms = new MemoryStream(file, false);
ms.Seek(16, SeekOrigin.Begin); // ines header
//pluck the necessary bytes out of the file
if (iNesHeaderInfo.trainer_size != 0)
{
trainer = new byte[512];
ms.Read(trainer, 0, 512);
}
Board.ROM = new byte[choice.prg_size * 1024];
ms.Read(Board.ROM, 0, Board.ROM.Length);
if (choice.chr_size > 0)
{
Board.VROM = new byte[choice.chr_size * 1024];
int vrom_copy_size = ms.Read(Board.VROM, 0, Board.VROM.Length);
if (vrom_copy_size < Board.VROM.Length)
{
LoadWriteLine("Less than the expected VROM was found in the file: {0} < {1}", vrom_copy_size, Board.VROM.Length);
}
}
if (choice.prg_size != iNesHeaderInfo.prg_size || choice.chr_size != iNesHeaderInfo.chr_size)
{
LoadWriteLine("Warning: Detected choice has different filesizes than the INES header!");
}
}
else
{
Board.ROM = unif.PRG;
Board.VROM = unif.CHR;
}
LoadReport.Flush();
CoreComm.RomStatusDetails = LoadReport.ToString();
// IF YOU DO ANYTHING AT ALL BELOW THIS LINE, MAKE SURE THE APPROPRIATE CHANGE IS MADE TO FDS (if applicable)
//create the vram and wram if necessary
if (cart.wram_size != 0)
{
Board.WRAM = new byte[cart.wram_size * 1024];
}
if (cart.vram_size != 0)
{
Board.VRAM = new byte[cart.vram_size * 1024];
}
Board.PostConfigure();
AutoMapperProps.Populate(Board, SyncSettings);
// set up display type
NESSyncSettings.Region fromrom = DetectRegion(cart.system);
NESSyncSettings.Region fromsettings = SyncSettings.RegionOverride;
if (fromsettings != NESSyncSettings.Region.Default)
{
Console.WriteLine("Using system region override");
fromrom = fromsettings;
}
switch (fromrom)
{
case NESSyncSettings.Region.Dendy:
_display_type = Common.DisplayType.DENDY;
break;
case NESSyncSettings.Region.NTSC:
_display_type = Common.DisplayType.NTSC;
break;
case NESSyncSettings.Region.PAL:
_display_type = Common.DisplayType.PAL;
break;
default:
_display_type = Common.DisplayType.NTSC;
break;
}
Console.WriteLine("Using NES system region of {0}", _display_type);
HardReset();
if (trainer != null)
{
Console.WriteLine("Applying trainer");
for (int i = 0; i < 512; i++)
{
WriteMemory((ushort)(0x7000 + i), trainer[i]);
}
}
}