mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 11:14:25 +00:00
387 lines
14 KiB
C#
387 lines
14 KiB
C#
// /***************************************************************************
|
|
// Aaru Data Preservation Suite
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : Helpers.cs
|
|
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
|
//
|
|
// Component : Disk image plugins.
|
|
//
|
|
// --[ Description ] ----------------------------------------------------------
|
|
//
|
|
// Contains helpers for Sydex TeleDisk disk images.
|
|
//
|
|
// --[ License ] --------------------------------------------------------------
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as
|
|
// published by the Free Software Foundation; either version 2.1 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
// Copyright © 2011-2025 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System;
|
|
using Aaru.CommonTypes;
|
|
using Aaru.CommonTypes.Enums;
|
|
using Aaru.Helpers;
|
|
using Aaru.Logging;
|
|
|
|
namespace Aaru.Images;
|
|
|
|
public sealed partial class TeleDisk
|
|
{
|
|
(ushort cylinder, byte head, byte sector) LbaToChs(ulong lba)
|
|
{
|
|
var cylinder = (ushort)(lba / (_imageInfo.Heads * _imageInfo.SectorsPerTrack));
|
|
var head = (byte)(lba / _imageInfo.SectorsPerTrack % _imageInfo.Heads);
|
|
var sector = (byte)(lba % _imageInfo.SectorsPerTrack + 1);
|
|
|
|
return (cylinder, head, sector);
|
|
}
|
|
|
|
static ushort TeleDiskCrc(ushort crc, byte[] buffer)
|
|
{
|
|
var counter = 0;
|
|
|
|
while(counter < buffer.Length)
|
|
{
|
|
crc ^= (ushort)((buffer[counter] & 0xFF) << 8);
|
|
|
|
for(var i = 0; i < 8; i++)
|
|
{
|
|
if((crc & 0x8000) > 0)
|
|
crc = (ushort)(crc << 1 ^ TELE_DISK_CRC_POLY);
|
|
else
|
|
crc = (ushort)(crc << 1);
|
|
}
|
|
|
|
counter++;
|
|
}
|
|
|
|
return crc;
|
|
}
|
|
|
|
static ErrorNumber DecodeTeleDiskData(byte sectorSize, byte encodingType, byte[] encodedData,
|
|
out byte[] decodedData)
|
|
{
|
|
decodedData = null;
|
|
|
|
switch(sectorSize)
|
|
{
|
|
case SECTOR_SIZE_128:
|
|
decodedData = new byte[128];
|
|
|
|
break;
|
|
case SECTOR_SIZE_256:
|
|
decodedData = new byte[256];
|
|
|
|
break;
|
|
case SECTOR_SIZE_512:
|
|
decodedData = new byte[512];
|
|
|
|
break;
|
|
case SECTOR_SIZE_1K:
|
|
decodedData = new byte[1024];
|
|
|
|
break;
|
|
case SECTOR_SIZE_2K:
|
|
decodedData = new byte[2048];
|
|
|
|
break;
|
|
case SECTOR_SIZE_4K:
|
|
decodedData = new byte[4096];
|
|
|
|
break;
|
|
case SECTOR_SIZE_8K:
|
|
decodedData = new byte[8192];
|
|
|
|
break;
|
|
default:
|
|
AaruLogging.Error(string.Format(Localization.Sector_size_0_is_incorrect, sectorSize));
|
|
|
|
return ErrorNumber.InvalidArgument;
|
|
}
|
|
|
|
switch(encodingType)
|
|
{
|
|
case DATA_BLOCK_COPY:
|
|
Array.Copy(encodedData, decodedData, decodedData.Length);
|
|
|
|
break;
|
|
case DATA_BLOCK_PATTERN:
|
|
{
|
|
var ins = 0;
|
|
var outs = 0;
|
|
|
|
while(ins < encodedData.Length)
|
|
{
|
|
var repeatValue = new byte[2];
|
|
|
|
var repeatNumber = BitConverter.ToUInt16(encodedData, ins);
|
|
Array.Copy(encodedData, ins + 2, repeatValue, 0, 2);
|
|
var decodedPiece = new byte[repeatNumber * 2];
|
|
ArrayHelpers.ArrayFill(decodedPiece, repeatValue);
|
|
Array.Copy(decodedPiece, 0, decodedData, outs, decodedPiece.Length);
|
|
ins += 4;
|
|
outs += decodedPiece.Length;
|
|
}
|
|
|
|
AaruLogging.Debug(MODULE_NAME,
|
|
Localization.Block_pattern_decoder_Input_data_size_0_bytes,
|
|
encodedData.Length);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.Block_pattern_decoder_Processed_input_0_bytes, ins);
|
|
|
|
AaruLogging.Debug(MODULE_NAME,
|
|
Localization.Block_pattern_decoder_Output_data_size_0_bytes,
|
|
decodedData.Length);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.Block_pattern_decoder_Processed_Output_0_bytes, outs);
|
|
|
|
break;
|
|
}
|
|
case DATA_BLOCK_RLE:
|
|
{
|
|
var ins = 0;
|
|
var outs = 0;
|
|
|
|
while(ins < encodedData.Length)
|
|
{
|
|
byte length;
|
|
|
|
byte encoding = encodedData[ins];
|
|
|
|
if(encoding == 0x00)
|
|
{
|
|
length = encodedData[ins + 1];
|
|
Array.Copy(encodedData, ins + 2, decodedData, outs, length);
|
|
ins += 2 + length;
|
|
outs += length;
|
|
}
|
|
else
|
|
{
|
|
length = (byte)(encoding * 2);
|
|
byte run = encodedData[ins + 1];
|
|
var part = new byte[length];
|
|
Array.Copy(encodedData, ins + 2, part, 0, length);
|
|
var piece = new byte[length * run];
|
|
ArrayHelpers.ArrayFill(piece, part);
|
|
Array.Copy(piece, 0, decodedData, outs, piece.Length);
|
|
ins += 2 + length;
|
|
outs += piece.Length;
|
|
}
|
|
}
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.RLE_decoder_Input_data_size_0_bytes, encodedData.Length);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.RLE_decoder_Processed_input_0_bytes, ins);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.RLE_decoder_Output_data_size_0_bytes, decodedData.Length);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, Localization.RLE_decoder_Processed_Output_0_bytes, outs);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
AaruLogging.Error(string.Format(Localization.Data_encoding_0_is_incorrect, encodingType));
|
|
|
|
return ErrorNumber.InvalidArgument;
|
|
}
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
MediaType DecodeTeleDiskDiskType()
|
|
{
|
|
switch(_header.DriveType)
|
|
{
|
|
case DRIVE_TYPE_525_DD:
|
|
case DRIVE_TYPE_525_HD_DD_DISK:
|
|
case DRIVE_TYPE_525_HD:
|
|
{
|
|
switch(_totalDiskSize)
|
|
{
|
|
case 143360:
|
|
return _imageInfo.SectorSize == 256 ? MediaType.MetaFloppy_Mod_I : MediaType.Unknown;
|
|
case 163840:
|
|
{
|
|
// Acorn disk uses 256 bytes/sector
|
|
return _imageInfo.SectorSize == 256 ? MediaType.ACORN_525_SS_DD_40 : MediaType.DOS_525_SS_DD_8;
|
|
|
|
// DOS disks use 512 bytes/sector
|
|
}
|
|
case 184320:
|
|
{
|
|
// Atari disk uses 256 bytes/sector
|
|
return _imageInfo.SectorSize == 256 ? MediaType.ATARI_525_DD : MediaType.DOS_525_SS_DD_9;
|
|
|
|
// DOS disks use 512 bytes/sector
|
|
}
|
|
case 315392:
|
|
return _imageInfo.SectorSize == 256 ? MediaType.MetaFloppy_Mod_II : MediaType.Unknown;
|
|
case 327680:
|
|
{
|
|
// Acorn disk uses 256 bytes/sector
|
|
return _imageInfo.SectorSize == 256 ? MediaType.ACORN_525_SS_DD_80 : MediaType.DOS_525_DS_DD_8;
|
|
|
|
// DOS disks use 512 bytes/sector
|
|
}
|
|
case 368640:
|
|
return MediaType.DOS_525_DS_DD_9;
|
|
case 1228800:
|
|
return MediaType.DOS_525_HD;
|
|
case 102400:
|
|
return MediaType.ACORN_525_SS_SD_40;
|
|
case 204800:
|
|
return MediaType.ACORN_525_SS_SD_80;
|
|
case 655360:
|
|
return MediaType.ACORN_525_DS_DD;
|
|
case 92160:
|
|
return MediaType.ATARI_525_SD;
|
|
case 133120:
|
|
return MediaType.ATARI_525_ED;
|
|
case 1310720:
|
|
return MediaType.NEC_525_HD;
|
|
case 1261568:
|
|
return MediaType.SHARP_525;
|
|
case 839680:
|
|
return MediaType.FDFORMAT_525_DD;
|
|
case 1304320:
|
|
return MediaType.ECMA_99_8;
|
|
case 1223424:
|
|
return MediaType.ECMA_99_15;
|
|
case 1061632:
|
|
return MediaType.ECMA_99_26;
|
|
case 80384:
|
|
return MediaType.ECMA_66;
|
|
case 325632:
|
|
return MediaType.ECMA_70;
|
|
case 653312:
|
|
return MediaType.ECMA_78;
|
|
case 737280:
|
|
return MediaType.ECMA_78_2;
|
|
default:
|
|
{
|
|
AaruLogging.Debug(MODULE_NAME, "Unknown 5,25\" disk with {0} bytes", _totalDiskSize);
|
|
|
|
return MediaType.Unknown;
|
|
}
|
|
}
|
|
}
|
|
case DRIVE_TYPE_35_DD:
|
|
case DRIVE_TYPE_35_ED:
|
|
case DRIVE_TYPE_35_HD:
|
|
{
|
|
switch(_totalDiskSize)
|
|
{
|
|
case 322560:
|
|
return MediaType.Apricot_35;
|
|
case 327680:
|
|
return MediaType.DOS_35_SS_DD_8;
|
|
case 368640:
|
|
return MediaType.DOS_35_SS_DD_9;
|
|
case 655360:
|
|
return MediaType.DOS_35_DS_DD_8;
|
|
case 737280:
|
|
return MediaType.DOS_35_DS_DD_9;
|
|
case 1474560:
|
|
return MediaType.DOS_35_HD;
|
|
case 2949120:
|
|
return MediaType.DOS_35_ED;
|
|
case 1720320:
|
|
return MediaType.DMF;
|
|
case 1763328:
|
|
return MediaType.DMF_82;
|
|
case 1884160: // Irreal size, seen as BIOS with TSR, 23 sectors/track
|
|
case 1860608: // Real data size, sum of all sectors
|
|
return MediaType.XDF_35;
|
|
case 819200:
|
|
return MediaType.CBM_35_DD;
|
|
case 901120:
|
|
return MediaType.CBM_AMIGA_35_DD;
|
|
case 1802240:
|
|
return MediaType.CBM_AMIGA_35_HD;
|
|
case 1310720:
|
|
return MediaType.NEC_35_HD_8;
|
|
case 1228800:
|
|
return MediaType.NEC_35_HD_15;
|
|
case 1261568:
|
|
return MediaType.SHARP_35;
|
|
default:
|
|
{
|
|
AaruLogging.Debug(MODULE_NAME, "Unknown 3,5\" disk with {0} bytes", _totalDiskSize);
|
|
|
|
return MediaType.Unknown;
|
|
}
|
|
}
|
|
}
|
|
case DRIVE_TYPE_8_INCH:
|
|
{
|
|
switch(_totalDiskSize)
|
|
{
|
|
case 81664:
|
|
return MediaType.IBM23FD;
|
|
case 242944:
|
|
return MediaType.IBM33FD_128;
|
|
case 287488:
|
|
return MediaType.IBM33FD_256;
|
|
case 306432:
|
|
return MediaType.IBM33FD_512;
|
|
case 499200:
|
|
return MediaType.IBM43FD_128;
|
|
case 574976:
|
|
return MediaType.IBM43FD_256;
|
|
case 995072:
|
|
return MediaType.IBM53FD_256;
|
|
case 1146624:
|
|
return MediaType.IBM53FD_512;
|
|
case 1222400:
|
|
return MediaType.IBM53FD_1024;
|
|
case 256256:
|
|
// Same size, with same disk geometry, for DEC RX01, NEC and ECMA, return ECMA
|
|
return MediaType.ECMA_54;
|
|
case 512512:
|
|
{
|
|
// DEC disk uses 256 bytes/sector
|
|
return _imageInfo.SectorSize == 256 ? MediaType.RX02 : MediaType.ECMA_59;
|
|
|
|
// ECMA disks use 128 bytes/sector
|
|
}
|
|
case 1261568:
|
|
return MediaType.NEC_8_DD;
|
|
case 1255168:
|
|
return MediaType.ECMA_69_8;
|
|
case 1177344:
|
|
return MediaType.ECMA_69_15;
|
|
case 1021696:
|
|
return MediaType.ECMA_69_26;
|
|
default:
|
|
{
|
|
AaruLogging.Debug(MODULE_NAME, "Unknown 8\" disk with {0} bytes", _totalDiskSize);
|
|
|
|
return MediaType.Unknown;
|
|
}
|
|
}
|
|
}
|
|
default:
|
|
{
|
|
AaruLogging.Debug(MODULE_NAME,
|
|
"Unknown drive type {1} with {0} bytes",
|
|
_totalDiskSize,
|
|
_header.DriveType);
|
|
|
|
return MediaType.Unknown;
|
|
}
|
|
}
|
|
}
|
|
} |