private void RomToDMA()
{
//Transfer data from ROM to DMA Tables
if (Info.DMATableOffset == 0x0)
{
IsDMALoaded = false;
return;
}
IsCompressed = false;
DMATable.Clear();
int CurrentPos = (int)Info.DMATableOffset;
try
{
while (CurrentPos < Size - 16)
{
uint VStart = ToolSettings.ReadUInt(_romData, CurrentPos, ROMEndianness);
uint PStart = ToolSettings.ReadUInt(_romData, CurrentPos + 4, ROMEndianness);
uint PEnd = ToolSettings.ReadUInt(_romData, CurrentPos + 8, ROMEndianness);
uint CompFlag = ToolSettings.ReadUInt(_romData, CurrentPos + 12, ROMEndianness);
//Create the actual data
byte[] dmaBytes = new byte[PEnd - PStart];
Array.Copy(_romData, PStart, dmaBytes, 0, dmaBytes.Length);
DMATableEntry entry = new DMATableEntry(VStart, PStart, PEnd, CompFlag, dmaBytes);
if ((entry.PStart == 0x00) && (entry.PEnd == 0x00))
{
break;
}
if (entry.CompFlag == 1)
{
IsCompressed = true;
}
DMATable.Add(entry);
CurrentPos += 16;
}
IsDMALoaded = true;
}
catch
{
IsDMALoaded = false;
}
//if (IsCompressed)
//{
// if (DecompressDMA())
// {
// DMAToRom();
// FixCRC();
// }
//}
}
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 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);
}