Ejemplo n.º 1
0
        public void readLogicalSector(int cyl, int side, int sec, byte[] buffer)
        {
            for (int i = 0; i < buffer.Length; i++)
            {
                buffer[i] = 0;
            }
            if (cyl < 0 || cyl >= this._cylynderList.Count)
            {
                return;
            }
            Track[] array = (Track[])this._cylynderList[cyl];
            if (side < 0 || side >= this._sideCount)
            {
                return;
            }
            Track track = array[side];

            for (int j = 0; j < track.HeaderList.Count; j++)
            {
                SECHDR sechdr = (SECHDR)track.HeaderList[j];
                if ((int)sechdr.n == sec && (int)sechdr.c == cyl && sechdr.dataOffset > 0)
                {
                    int num = sechdr.datlen;
                    if (num > buffer.Length)
                    {
                        num = buffer.Length;
                    }
                    for (int k = 0; k < num; k++)
                    {
                        buffer[k] = track.RawRead(sechdr.dataOffset + k);
                    }
                    return;
                }
            }
        }
Ejemplo n.º 2
0
 public void RefreshHeaders()
 {
     this._headerList.Clear();
     if (this._trackImage == null)
     {
         return;
     }
     for (int i = 0; i < this._trackImage.Length - 8; i++)
     {
         if (this._trackImage[i] == 161 && this._trackImage[i + 1] == 254 && this.RawTestClock(i))
         {
             SECHDR sechdr = new SECHDR();
             this._headerList.Add(sechdr);
             sechdr.idOffset   = i + 2;
             sechdr.idTime     = (ulong)((long)sechdr.idOffset * (long)this._byteTime);
             sechdr.c          = this._trackImage[sechdr.idOffset];
             sechdr.s          = this._trackImage[sechdr.idOffset + 1];
             sechdr.n          = this._trackImage[sechdr.idOffset + 2];
             sechdr.l          = this._trackImage[sechdr.idOffset + 3];
             sechdr.crc1       = (ushort)((int)this._trackImage[i + 6] | (int)this._trackImage[i + 7] << 8);
             sechdr.c1         = (this.WD1793_CRC(i + 1, 5) == sechdr.crc1);
             sechdr.dataOffset = -1;
             sechdr.datlen     = 0;
             if (sechdr.l <= 5)
             {
                 int num = this._trackImage.Length - 8;
                 int j   = i + 8;
                 while (j < num)
                 {
                     if (this._trackImage[j] == 161 && this.RawTestClock(j) && !this.RawTestClock(j + 1))
                     {
                         if (this._trackImage[j + 1] != 248 && this._trackImage[j + 1] != 251)
                         {
                             break;
                         }
                         sechdr.datlen     = 128 << (int)sechdr.l;
                         sechdr.dataOffset = j + 2;
                         sechdr.dataTime   = (ulong)((long)sechdr.dataOffset * (long)this._byteTime);
                         if (sechdr.dataOffset + sechdr.datlen + 2 > this._trackImage.Length)
                         {
                             sechdr.datlen = this._trackImage.Length - sechdr.dataOffset;
                             sechdr.crc2   = (ushort)((this.WD1793_CRC(sechdr.dataOffset - 1, sechdr.datlen + 1) ^ ushort.MaxValue));
                             sechdr.c2     = false;
                             break;
                         }
                         sechdr.crc2 = (ushort)((int)this._trackImage[sechdr.dataOffset + sechdr.datlen] | (int)this._trackImage[sechdr.dataOffset + sechdr.datlen + 1] << 8);
                         sechdr.c2   = (this.WD1793_CRC(sechdr.dataOffset - 1, sechdr.datlen + 1) == sechdr.crc2);
                         break;
                     }
                     else
                     {
                         j++;
                     }
                 }
             }
         }
     }
 }
Ejemplo n.º 3
0
        public void writeLogicalSector(int cyl, int side, int sec, byte[] buffer)
        {
            if (cyl < 0 || cyl >= this._cylynderList.Count)
            {
                return;
            }
            Track[] array = (Track[])this._cylynderList[cyl];
            if (side < 0 || side >= this._sideCount)
            {
                return;
            }
            Track track = array[side];

            for (int i = 0; i < track.HeaderList.Count; i++)
            {
                SECHDR sechdr = (SECHDR)track.HeaderList[i];
                if ((int)sechdr.n == sec && (int)sechdr.c == cyl && sechdr.dataOffset > 0 && sechdr.datlen >= buffer.Length)
                {
                    int num = buffer.Length;
                    if (num > sechdr.datlen)
                    {
                        num = sechdr.datlen;
                    }
                    for (int j = 0; j < num; j++)
                    {
                        track.RawWrite(sechdr.dataOffset + j, buffer[j], false);
                    }
                    ushort num2 = track.WD1793_CRC(sechdr.dataOffset - 1, sechdr.datlen + 1);
                    track.RawWrite(sechdr.dataOffset + sechdr.datlen, (byte)num2, false);
                    track.RawWrite(sechdr.dataOffset + sechdr.datlen + 1, (byte)(num2 >> 8), false);
                    sechdr.crc2 = num2;
                    sechdr.c2   = true;
                    return;
                }
            }
        }