private PhysicalContents Analyse()
{
PhysicalContents _contents = new PhysicalContents();
byte[] contents = File.ReadAllBytes(_filename);
int bytesPerSector = contents[11] + (contents[12] << 8);
int sectorsPerTrack = contents[24] + (contents[25] << 8);
int sides = contents[26] + (contents[27] << 8);
byte diskFormat = contents[21];
int trackSize = bytesPerSector * sectorsPerTrack;
int numTracks = contents.Length / (trackSize * sides);
for (int trk = 0; trk < numTracks; trk++)
{
TrackInfo info = new TrackInfo();
for (int side = 0; side < sides; side++)
{
TrackSide ts = new TrackSide();
for (int sector = 0; sector < sectorsPerTrack; sector++)
{
SectorInfo sec = new SectorInfo();
sec.contents = new byte[bytesPerSector];
int index = (((trk * sides) + side) * trackSize) + (sector * bytesPerSector);
Array.Copy(contents, index, sec.contents, 0, bytesPerSector);
ts.sectors.Add(sec);
}
info.sides.Add(ts);
}
_contents.tracks.Add(info);
}
FillPhysicalDefaults(_contents, bytesPerSector, diskFormat);
return(_contents);
}
private PhysicalContents Analyze()
{
PhysicalContents _contents = new PhysicalContents();
byte[] contents = File.ReadAllBytes(_filename);
int NumTrackBlocks = contents.Length / 0x2B00;
_contents.diskformat = contents[0x08];
bool DS = ((_contents.diskformat & 1) == 1);
for (int i = 0; i < NumTrackBlocks; i++)
{
TrackInfo trackInfo = new TrackInfo();
for (int j = 0; j < 2; j++)
{
TrackSide trackside = new TrackSide();
if (!DS || j == 0)
{
trackInfo = new TrackInfo();
trackInfo.sides = new List <TrackSide>();
_contents.tracks.Add(trackInfo);
}
trackInfo.sides.Add(trackside);
int PhysTrack = DS ? i : i / 2;
int PhysHead = DS ? j : 0;
trackInfo.sides[PhysHead] = trackside;
trackside.physicalTrackNr = PhysTrack;
trackside.HeadNr = PhysHead;
trackside.sectors = new List <SectorInfo>();
long adr = (i * 0x2B00) + j * 0x180;
trackside.diskformat = contents[adr + 0x08];
int Sectors = contents[adr + 0x09];
trackside.flag = contents[adr + 0x0A];
trackside.gaps = new Gap[5];
for (int k = 0; k < 5; k++)
{
trackside.gaps[k] = new Gap(((contents[adr + (k * 2) + 0x11]) << 8) + (contents[adr + (k * 2) + 0x10]),
contents[adr + k + 0x0B]);
}
long dataAddr = (i * 0x2B00) + 0x300 + (j * 0x1400);
long sectOffset = 0;
for (int sect = 0; sect < Sectors; sect++)
{
SectorInfo sectInfo = AnalyzeSector(contents, dataAddr + sectOffset, adr, sect);
sectOffset += sectInfo.contents.Length;
trackside.sectors.Add(sectInfo);
}
}
}
return(_contents);
}
private PhysicalContents Analyze()
{
PhysicalContents _contents = new PhysicalContents();
byte[] contents = File.ReadAllBytes(_filename);
int numTracks = contents[0x01];
int trackSize = contents[0x02] + (contents[0x03] << 8);
bool SSOnly = (contents[0x04] & 0x10) == 0x10;
// ignore the rest for now
for (int t = 0; t < numTracks; t++)
{
TrackInfo track = new TrackInfo();
for (int s = 0; s < 2; s++)
{
TrackSide side = new TrackSide();
side.physicalTrackNr = t;
side.HeadNr = s;
int headerOffset = ((t * 2) + s) * trackSize + 0x10;
AnalyzeTrack(side, contents, headerOffset, trackSize);
track.sides.Add(side);
}
_contents.tracks.Add(track);
}
TrackSide track0 = _contents.tracks[0].sides[0];
_contents.diskformat = 0xFC;
foreach (SectorInfo sector in track0.sectors)
{
if (sector.sector == 1) // found the boot
{
_contents.diskformat = sector.contents[0x15];
}
}
if (SSOnly)
{
_contents.diskformat |= 0x01; // force double sided
}
if (numTracks > 42)
{
_contents.diskformat &= 0xFB; // force 80 tracks
}
foreach (TrackInfo track in _contents.tracks)
{
foreach (TrackSide side in track.sides)
{
side.diskformat = _contents.diskformat;
}
}
return(_contents);
}
private void FillPhysicalDefaults(PhysicalContents _contents, int bytesPerSector, byte diskFormat)
{
byte[] sizecodes = new byte[] { 0, 1, 0, 2, 0, 0, 0, 3 };
_contents.diskformat = diskFormat;
byte trk = 0;
byte head = 0;
byte sec = 1;
foreach (TrackInfo track in _contents.tracks)
{
head = 0;
foreach (TrackSide side in track.sides)
{
sec = 1;
foreach (SectorInfo sector in side.sectors)
{
sector.dam = 0xFB;
sector.gapFillers = new byte[2] {
0x4E, 0x4E
};
sector.gaps = new int[2] {
22, 54
};
sector.head = head;
sector.track = trk;
sector.sector = sec;
sector.sizecode = sizecodes[((bytesPerSector / 128) - 1)];
sector.calcHeaderCRC = CalcCRC16(new byte[] { 0xA1, 0xA1, 0xA1, 0xFE, trk, head, sec, sector.sizecode }, 0, 8);
ushort dataCRC = CalcCRC16(new byte[] { 0xA1, 0xA1, 0xA1, 0xFB }, 0, 4);
CalcCRC16(sector.contents, 0, bytesPerSector, ref dataCRC);
sector.calcDataCRC = dataCRC;
sec++;
}
side.physicalTrackNr = trk;
side.HeadNr = head;
int[] gapsizes = new int[] { 80, 50, 22, 54, 598 };
for (int g = 0; g < 5; g++)
{
side.gaps[g] = new Gap(gapsizes[g], 0x4E);
}
side.flag = 1;
side.diskformat = diskFormat;
head++;
}
trk++;
}
}
private void WritePDI(string filename)
{
PhysicalContents _contents = Contents.physical;
byte[] buffer = new byte[0x180];
FileStream outputStream = new FileStream(filename, FileMode.Create);
BinaryWriter writer = new BinaryWriter(outputStream);
int numTracks = _contents.tracks.Count;
int numSides = (_contents.diskformat & 1) + 1;
if ((numSides == 1) && ((numTracks % 2) == 1)) // we can't have an odd track
{
TrackInfo track = new TrackInfo();
track.sides.Add(new TrackSide());
_contents.tracks.Add(track);
}
int numBlocks = numTracks * numSides;
for (int block = 0; block < numBlocks; block += 2)
{
for (int i = 0; i < 2; i++)
{
Array.Clear(buffer, 0, 0x180);
int track = (block + i) / numSides;
int side = (block + i) % numSides;
TrackSide ts = _contents.tracks[track].sides[side];
Array.Copy(new ASCIIEncoding().GetBytes("PDI-MSX"), 0, buffer, 0, 7);
buffer[0x07] = 0x20;
buffer[0x08] = _contents.diskformat;
buffer[0x09] = (byte)ts.sectors.Count;
buffer[0x0a] = (byte)1;
for (int g = 0; g < 5; g++)
{
buffer[0x0b + g] = (byte)ts.gaps[g].Filler;
buffer[0x10 + (g * 2)] = (byte)(ts.gaps[g].Size & 0xFF);
buffer[0x11 + (g * 2)] = (byte)((ts.gaps[g].Size & 0xFF00) >> 8);
}
int count = 0;
foreach (SectorInfo sector in ts.sectors)
{
buffer[0x1A + count] = sector.track;
buffer[0x38 + count] = sector.head;
buffer[0x56 + count] = sector.sector;
buffer[0x74 + count] = sector.sizecode;
buffer[0x92 + count] = (byte)((sector.imgHeaderCRC & 0xFF00) >> 8);
buffer[0xb0 + count] = (byte)(sector.imgHeaderCRC & 0xFF);
buffer[0xce + count] = sector.errorCode;
int dataSize = SectorSizeFromCode(sector.sizecode);
int realSize = 0;
if (sector.contents.Length != dataSize)
{
realSize = sector.contents.Length;
if (realSize == 0)
{
realSize = 1; // PDI doesn't support a zero size sector.
}
}
buffer[0xec + (2 * count)] = (byte)(realSize & 0xFF);
buffer[0xed + (2 * count)] = (byte)((realSize & 0xFF00) >> 8);
buffer[0x128 + (2 * count)] = (byte)(sector.imgDataCRC & 0xFF);
buffer[0x129 + (2 * count)] = (byte)((sector.imgDataCRC & 0xFF00) >> 8);
count++;
}
writer.Write(buffer, 0, 0x180);
}
for (int i = 0; i < 2; i++)
{
int track = (block + i) / numSides;
int side = (block + i) % numSides;
TrackSide ts = _contents.tracks[track].sides[side];
int byteCount = 0;
foreach (SectorInfo sector in ts.sectors)
{
writer.Write(sector.contents, 0, sector.contents.Length);
byteCount += sector.contents.Length;
}
WriteBytes(writer, 0xF7, (0x1400 - byteCount));
}
}
}