public bool FixCRC()
{
//Only apply crc fix to the full rom data container, not to the separated dma table data container
if (N64Sums.FixChecksum(_romData))
{
IsValidRom = true;
uint crc1 = ToolSettings.ReadUInt(_romData, 16, ROMEndianness);
uint crc2 = ToolSettings.ReadUInt(_romData, 20, ROMEndianness);
Info = new ROMInfo(Info.Title, Info.GameID, Info.Version, crc1, crc2, Info.DMATableOffset);
return(true);
}
return(false);
}
private void FixDMATable()
{
for (int i = 0; i < DMATable.Count; i++)
{
if (i < 2) //Don't apply to early entries, it's okay
{
continue;
}
int CurrentPos = (int)Info.DMATableOffset + 16 * i;
ToolSettings.WriteUInt(DMATable[i].VStart, _romData, CurrentPos, ROMEndianness);
ToolSettings.WriteUInt(DMATable[i].PStart, _romData, CurrentPos + 4, ROMEndianness);
ToolSettings.WriteUInt(DMATable[i].PEnd, _romData, CurrentPos + 8, ROMEndianness);
ToolSettings.WriteUInt(DMATable[i].CompFlag, _romData, CurrentPos + 12, ROMEndianness);
}
}
private bool DecompressDMA()
{
if (!IsDMALoaded)
{
return(false);
}
for (int i = 0; i < DMATable.Count; i++)
{
DMATableEntry dma = DMATable[i];
if (dma.CompFlag == 0x1)
{
//compressed
//Decompress here
byte[] newDMAData;
if (ToolSettings.DecompressMIO0(dma.DMAData, out newDMAData))
{
dma.DMAData = newDMAData;
dma.PEnd = dma.VStart + (uint)newDMAData.Length;
dma.PStart = dma.VStart;
dma.CompFlag = 0x0;
}
else
{
//Catastrophic failure, just quit out
return(false);
}
}
else
{
//uncompressed
dma.PEnd = dma.VStart + (dma.PEnd - dma.PStart);
dma.PStart = dma.VStart;
}
DMATable[i] = dma;
}
return(true);
}
private void SetRomInfo(uint dmaTableOffset = 0x0)
{
string title = System.Text.Encoding.UTF8.GetString(_romData, 32, 20);
string gameID = System.Text.Encoding.UTF8.GetString(_romData, 59, 4);
byte version = _romData[63];
uint endian = ToolSettings.ReadUInt(_romData, 0);
ROMEndianness = StarFoxRomInfo.GetEndianness(endian);
uint crc1 = ToolSettings.ReadUInt(_romData, 16, ROMEndianness);
uint crc2 = ToolSettings.ReadUInt(_romData, 20, ROMEndianness);
if (dmaTableOffset == 0x0)
{
dmaTableOffset = StarFoxRomInfo.GetDMATableOffset(gameID, version);
}
//To be discovered: will this need to be changed to also change the CRC values??? Or can I leave them untouched?
Info = new ROMInfo(title, gameID, version, crc1, crc2, dmaTableOffset);
IsValidRom = StarFoxRomInfo.IsValidVersion(Info);
}
