internal static bool IsValidDirectoryEntry(cSector Sector, int SubIndex, ushort SectorIndex, cFAT FAT)
{
if (SubIndex > Sector.Memory.Length)
{
return(false);
}
for (int i = 0; i < 6; i++)
{
if (Sector.Memory[SubIndex] == 0x0000) //Name
{
return(false);
}
}
uint TempSize = (uint)(Sector.Memory[SubIndex + 0xC] + (Sector.Memory[SubIndex + 0xD] << 16));
if ((TempSize == 0) && ((Sector.Memory[SubIndex + 0x5] & 0x0010) == 0))
{
return(false);
}
if (FAT.NextSector(SectorIndex) == 0x0000)
{
return(false);
}
return(true);
}
internal cSector Clone()
{
cSector Clone = new cSector();
for (int i = 0; i < this.Memory.Length; i++)
{
Clone.Memory[i] = this.Memory[i];
}
Clone.Mode = this.Mode;
return(Clone);
}
internal void ChangeNumKernelSectorsAndRelocateFAT(ushort NewNumber)
{
cSector[] Temp = new cSector[NumFatSectors];
for (int i = 0; i < NumFatSectors; i++)
{
Temp[i] = Floppy.Sectors[i + FatIndex];
}
FatIndex = (ushort)(NewNumber + 1);
Floppy.Sectors[0].Memory[8] = FatIndex;
for (int i = 0; i < NumFatSectors; i++)
{
Floppy.Sectors[i + FatIndex] = Temp[i];
}
}
internal List <cSector> GetFile(FileType Type)
{
List <cSector> Result = new List <cSector>();
cSector WorkingSector = new cSector();
int ReadoutIndex = 0;
int IntSectorIndex = 0;
if (Type == FileType.Bootloader || Type == FileType.Kernel || Type == FileType.fullFloppy)
{
//atm no special actions required...
}
else
{
//add file Metadata
//name is 0 for now
//extensaion is 0 for now
//dateTimes 0 for now
WorkingSector.Memory[0xC] = (ushort)(Readout.Count & 0x0000FFFF);
WorkingSector.Memory[0xD] = (ushort)(Readout.Count >> 16);
//First Sector unknown for now
//reserved is reserved
IntSectorIndex = 0x0010;
}
for (ReadoutIndex = 0; ReadoutIndex < Readout.Count; ReadoutIndex++)
{
WorkingSector.Memory[IntSectorIndex] = Readout[ReadoutIndex];
IntSectorIndex++;
if (IntSectorIndex == WorkingSector.Memory.Length) //current sector is full, need new one
{
IntSectorIndex = 0;
Result.Add(WorkingSector.Clone());
WorkingSector = new cSector();
}
}
if (IntSectorIndex > 0)
{
Result.Add(WorkingSector.Clone());
}
return(Result);
}
static public bool VerifyFHAT16BootSector(cSector Bootloader, ushort KernelSectorSize, ushort FloppyLength, bool IsBootable)
{
if (IsBootable && Bootloader.Memory[0] != 0xC382) //is the Bootable Flag correct?
{
MessageBox.Show("Incorrect Bootflag");
return(false);
}
else if (!IsBootable && Bootloader.Memory[0] != 0x0000)
{
MessageBox.Show("Incorrect Bootflag");
return(false);
}
//now some checks for consistency to the HA FAT
if (Bootloader.Memory[8] != KernelSectorSize)
{
if (MessageBox.Show("Wrong amount of reserved sectors detected.\r\nCorrect them?", "FAT Inconsistency", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
Bootloader.Memory[8] = KernelSectorSize;
}
else
{
return(false);
}
}
if (FloppyLength != Bootloader.Memory[0xb])
{
if (MessageBox.Show("Wron amount of sectors specified fot the loaded Device.\r\nCorrect them?", "Device size inconsitency", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
Bootloader.Memory[0xb] = FloppyLength;
}
else
{
return(false);
}
}
//and whatever more can go wrong...
return(true);
}
internal void CreateBootSector(string MediaName, int NumSectors)
{
cSector BootSector = new cSector();
BootSector.Memory[0] = 0;
BootSector.Memory[1] = 0xFA16;
ushort[] Temp = cFileSigConverter.ConvertToMediaNameSig(TrimMediaName(MediaName));
BootSector.Memory[2] = Temp[0];
BootSector.Memory[3] = Temp[1];
BootSector.Memory[4] = Temp[2];
BootSector.Memory[5] = Temp[3];
BootSector.Memory[6] = Temp[4];
BootSector.Memory[7] = Temp[5];
BootSector.Memory[8] = 1;
BootSector.Memory[9] = 1;
BootSector.Memory[10] = 512;
BootSector.Memory[11] = (ushort)NumSectors;
Temp = cFileSigConverter.CreateSerial();
BootSector.Memory[12] = Temp[0];
BootSector.Memory[13] = Temp[1];
BootSector.Memory[14] = Temp[2];
BootSector.Memory[15] = Temp[3];
Floppy.Sectors[0] = BootSector;
}