static BpbKind DetectBpbKind(byte[] bpbSector, IMediaImage imagePlugin, Partition partition,
out BiosParameterBlockEbpb fakeBpb, out HumanParameterBlock humanBpb,
out AtariParameterBlock atariBpb, out byte minBootNearJump,
out bool andosOemCorrect, out bool bootable)
{
fakeBpb = new BiosParameterBlockEbpb();
minBootNearJump = 0;
andosOemCorrect = false;
bootable = false;
humanBpb = Marshal.ByteArrayToStructureBigEndian <HumanParameterBlock>(bpbSector);
atariBpb = Marshal.ByteArrayToStructureLittleEndian <AtariParameterBlock>(bpbSector);
ulong expectedClusters = humanBpb.bpc > 0 ? partition.Size / humanBpb.bpc : 0;
// Check clusters for Human68k are correct
bool humanClustersCorrect = humanBpb.clusters == 0 ? humanBpb.big_clusters == expectedClusters
: humanBpb.clusters == expectedClusters;
// Check OEM for Human68k is correct
bool humanOemCorrect = bpbSector[2] >= 0x20 && bpbSector[3] >= 0x20 && bpbSector[4] >= 0x20 &&
bpbSector[5] >= 0x20 && bpbSector[6] >= 0x20 && bpbSector[7] >= 0x20 &&
bpbSector[8] >= 0x20 && bpbSector[9] >= 0x20 && bpbSector[10] >= 0x20 &&
bpbSector[11] >= 0x20 && bpbSector[12] >= 0x20 && bpbSector[13] >= 0x20 &&
bpbSector[14] >= 0x20 && bpbSector[15] >= 0x20 && bpbSector[16] >= 0x20 &&
bpbSector[17] >= 0x20;
// Check correct branch for Human68k
bool humanBranchCorrect = bpbSector[0] == 0x60 && bpbSector[1] >= 0x1C && bpbSector[1] < 0xFE;
AaruConsole.DebugWriteLine("FAT plugin", "humanClustersCorrect = {0}", humanClustersCorrect);
AaruConsole.DebugWriteLine("FAT plugin", "humanOemCorrect = {0}", humanOemCorrect);
AaruConsole.DebugWriteLine("FAT plugin", "humanBranchCorrect = {0}", humanBranchCorrect);
// If all Human68k checks are correct, it is a Human68k FAT16
bool useHumanBpb = humanClustersCorrect && humanOemCorrect && humanBranchCorrect && expectedClusters > 0;
if (useHumanBpb)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using Human68k BPB");
fakeBpb.jump = humanBpb.jump;
fakeBpb.oem_name = humanBpb.oem_name;
fakeBpb.bps = (ushort)imagePlugin.Info.SectorSize;
fakeBpb.spc = (byte)(humanBpb.bpc / fakeBpb.bps);
fakeBpb.fats_no = 2;
fakeBpb.root_ent = humanBpb.root_ent;
fakeBpb.media = humanBpb.media;
fakeBpb.spfat = (ushort)(humanBpb.cpfat * fakeBpb.spc);
fakeBpb.boot_code = humanBpb.boot_code;
fakeBpb.sectors = humanBpb.clusters;
fakeBpb.big_sectors = humanBpb.big_clusters;
fakeBpb.rsectors = 1;
return(BpbKind.Human);
}
var msxBpb = new MsxParameterBlock();
var dos2Bpb = new BiosParameterBlock2();
var dos30Bpb = new BiosParameterBlock30();
var dos32Bpb = new BiosParameterBlock32();
var dos33Bpb = new BiosParameterBlock33();
var shortEbpb = new BiosParameterBlockShortEbpb();
var ebpb = new BiosParameterBlockEbpb();
var apricotBpb = new ApricotLabel();
bool useAtariBpb = false;
bool useMsxBpb = false;
bool useDos2Bpb = false;
bool useDos3Bpb = false;
bool useDos32Bpb = false;
bool useDos33Bpb = false;
bool userShortExtendedBpb = false;
bool useExtendedBpb = false;
bool useShortFat32 = false;
bool useLongFat32 = false;
bool useApricotBpb = false;
bool useDecRainbowBpb = false;
if (imagePlugin.Info.SectorSize >= 256)
{
msxBpb = Marshal.ByteArrayToStructureLittleEndian <MsxParameterBlock>(bpbSector);
dos2Bpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlock2>(bpbSector);
dos30Bpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlock30>(bpbSector);
dos32Bpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlock32>(bpbSector);
dos33Bpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlock33>(bpbSector);
shortEbpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlockShortEbpb>(bpbSector);
ebpb = Marshal.ByteArrayToStructureLittleEndian <BiosParameterBlockEbpb>(bpbSector);
Fat32ParameterBlockShort shortFat32Bpb =
Marshal.ByteArrayToStructureLittleEndian <Fat32ParameterBlockShort>(bpbSector);
Fat32ParameterBlock fat32Bpb = Marshal.ByteArrayToStructureLittleEndian <Fat32ParameterBlock>(bpbSector);
apricotBpb = Marshal.ByteArrayToStructureLittleEndian <ApricotLabel>(bpbSector);
int bitsInBpsMsx = CountBits.Count(msxBpb.bps);
int bitsInBpsDos33 = CountBits.Count(dos33Bpb.bps);
int bitsInBpsDos40 = CountBits.Count(ebpb.bps);
int bitsInBpsFat32Short = CountBits.Count(shortFat32Bpb.bps);
int bitsInBpsFat32 = CountBits.Count(fat32Bpb.bps);
int bitsInBpsApricot = CountBits.Count(apricotBpb.mainBPB.bps);
bool correctSpcMsx = msxBpb.spc == 1 || msxBpb.spc == 2 || msxBpb.spc == 4 || msxBpb.spc == 8 ||
msxBpb.spc == 16 || msxBpb.spc == 32 || msxBpb.spc == 64;
bool correctSpcDos33 = dos33Bpb.spc == 1 || dos33Bpb.spc == 2 || dos33Bpb.spc == 4 ||
dos33Bpb.spc == 8 || dos33Bpb.spc == 16 || dos33Bpb.spc == 32 ||
dos33Bpb.spc == 64;
bool correctSpcDos40 = ebpb.spc == 1 || ebpb.spc == 2 || ebpb.spc == 4 || ebpb.spc == 8 ||
ebpb.spc == 16 || ebpb.spc == 32 || ebpb.spc == 64;
bool correctSpcFat32Short = shortFat32Bpb.spc == 1 || shortFat32Bpb.spc == 2 ||
shortFat32Bpb.spc == 4 || shortFat32Bpb.spc == 8 ||
shortFat32Bpb.spc == 16 || shortFat32Bpb.spc == 32 ||
shortFat32Bpb.spc == 64;
bool correctSpcFat32 = fat32Bpb.spc == 1 || fat32Bpb.spc == 2 || fat32Bpb.spc == 4 ||
fat32Bpb.spc == 8 || fat32Bpb.spc == 16 || fat32Bpb.spc == 32 ||
fat32Bpb.spc == 64;
bool correctSpcApricot = apricotBpb.mainBPB.spc == 1 || apricotBpb.mainBPB.spc == 2 ||
apricotBpb.mainBPB.spc == 4 || apricotBpb.mainBPB.spc == 8 ||
apricotBpb.mainBPB.spc == 16 || apricotBpb.mainBPB.spc == 32 ||
apricotBpb.mainBPB.spc == 64;
// This is to support FAT partitions on hybrid ISO/USB images
if (imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
{
atariBpb.sectors /= 4;
msxBpb.sectors /= 4;
dos2Bpb.sectors /= 4;
dos30Bpb.sectors /= 4;
dos32Bpb.sectors /= 4;
dos33Bpb.sectors /= 4;
dos33Bpb.big_sectors /= 4;
shortEbpb.sectors /= 4;
shortEbpb.big_sectors /= 4;
ebpb.sectors /= 4;
ebpb.big_sectors /= 4;
shortFat32Bpb.sectors /= 4;
shortFat32Bpb.big_sectors /= 4;
shortFat32Bpb.huge_sectors /= 4;
fat32Bpb.sectors /= 4;
fat32Bpb.big_sectors /= 4;
apricotBpb.mainBPB.sectors /= 4;
}
andosOemCorrect = dos33Bpb.oem_name[0] < 0x20 && dos33Bpb.oem_name[1] >= 0x20 &&
dos33Bpb.oem_name[2] >= 0x20 && dos33Bpb.oem_name[3] >= 0x20 &&
dos33Bpb.oem_name[4] >= 0x20 && dos33Bpb.oem_name[5] >= 0x20 &&
dos33Bpb.oem_name[6] >= 0x20 && dos33Bpb.oem_name[7] >= 0x20;
if (bitsInBpsFat32 == 1 &&
correctSpcFat32 &&
fat32Bpb.fats_no <= 2 &&
fat32Bpb.sectors == 0 &&
fat32Bpb.spfat == 0 &&
fat32Bpb.signature == 0x29 &&
Encoding.ASCII.GetString(fat32Bpb.fs_type) == "FAT32 ")
{
AaruConsole.DebugWriteLine("FAT plugin", "Using FAT32 BPB");
minBootNearJump = 0x58;
return(BpbKind.LongFat32);
}
if (bitsInBpsFat32Short == 1 &&
correctSpcFat32Short &&
shortFat32Bpb.fats_no <= 2 &&
shortFat32Bpb.sectors == 0 &&
shortFat32Bpb.spfat == 0 &&
shortFat32Bpb.signature == 0x28)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using short FAT32 BPB");
minBootNearJump = 0x57;
return(BpbKind.ShortFat32);
}
if (bitsInBpsMsx == 1 &&
correctSpcMsx &&
msxBpb.fats_no <= 2 &&
msxBpb.root_ent > 0 &&
msxBpb.sectors <= (partition.End - partition.Start) + 1 &&
msxBpb.spfat > 0 &&
Encoding.ASCII.GetString(msxBpb.vol_id) == "VOL_ID")
{
AaruConsole.DebugWriteLine("FAT plugin", "Using MSX BPB");
useMsxBpb = true;
}
else if (bitsInBpsApricot == 1 &&
correctSpcApricot &&
apricotBpb.mainBPB.fats_no <= 2 &&
apricotBpb.mainBPB.root_ent > 0 &&
apricotBpb.mainBPB.sectors <= (partition.End - partition.Start) + 1 &&
apricotBpb.mainBPB.spfat > 0 &&
apricotBpb.partitionCount == 0)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using Apricot BPB");
useApricotBpb = true;
}
else if (bitsInBpsDos40 == 1 &&
correctSpcDos40 &&
ebpb.fats_no <= 2 &&
ebpb.root_ent > 0 &&
ebpb.spfat > 0 &&
(ebpb.signature == 0x28 || ebpb.signature == 0x29 || andosOemCorrect))
{
if (ebpb.sectors == 0)
{
if (ebpb.big_sectors <= (partition.End - partition.Start) + 1)
{
if (ebpb.signature == 0x29 || andosOemCorrect)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 4.0 BPB");
useExtendedBpb = true;
minBootNearJump = 0x3C;
}
else
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.4 BPB");
userShortExtendedBpb = true;
minBootNearJump = 0x29;
}
}
}
else if (ebpb.sectors <= (partition.End - partition.Start) + 1)
{
if (ebpb.signature == 0x29 || andosOemCorrect)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 4.0 BPB");
useExtendedBpb = true;
minBootNearJump = 0x3C;
}
else
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.4 BPB");
userShortExtendedBpb = true;
minBootNearJump = 0x29;
}
}
}
else if (bitsInBpsDos33 == 1 &&
correctSpcDos33 &&
dos33Bpb.rsectors < partition.End - partition.Start &&
dos33Bpb.fats_no <= 2 &&
dos33Bpb.root_ent > 0 &&
dos33Bpb.spfat > 0)
{
if (dos33Bpb.sectors == 0 &&
dos33Bpb.hsectors <= partition.Start &&
dos33Bpb.big_sectors > 0 &&
dos33Bpb.big_sectors <= (partition.End - partition.Start) + 1)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.3 BPB");
useDos33Bpb = true;
minBootNearJump = 0x22;
}
else if (dos33Bpb.big_sectors == 0 &&
dos33Bpb.hsectors <= partition.Start &&
dos33Bpb.sectors > 0 &&
dos33Bpb.sectors <= (partition.End - partition.Start) + 1)
{
if (atariBpb.jump[0] == 0x60 ||
(atariBpb.jump[0] == 0xE9 && atariBpb.jump[1] == 0x00 &&
Encoding.ASCII.GetString(dos33Bpb.oem_name) != "NEXT "))
{
AaruConsole.DebugWriteLine("FAT plugin", "Using Atari BPB");
useAtariBpb = true;
}
else
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.3 BPB");
useDos33Bpb = true;
minBootNearJump = 0x22;
}
}
else
{
if (dos32Bpb.hsectors <= partition.Start &&
dos32Bpb.hsectors + dos32Bpb.sectors == dos32Bpb.total_sectors)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.2 BPB");
useDos32Bpb = true;
minBootNearJump = 0x1E;
}
else if (dos30Bpb.sptrk > 0 &&
dos30Bpb.sptrk < 64 &&
dos30Bpb.heads > 0 &&
dos30Bpb.heads < 256)
{
if (atariBpb.jump[0] == 0x60 ||
(atariBpb.jump[0] == 0xE9 && atariBpb.jump[1] == 0x00 &&
Encoding.ASCII.GetString(dos33Bpb.oem_name) != "NEXT "))
{
AaruConsole.DebugWriteLine("FAT plugin", "Using Atari BPB");
useAtariBpb = true;
}
else
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 3.0 BPB");
useDos3Bpb = true;
minBootNearJump = 0x1C;
}
}
else
{
if (atariBpb.jump[0] == 0x60 ||
(atariBpb.jump[0] == 0xE9 && atariBpb.jump[1] == 0x00 &&
Encoding.ASCII.GetString(dos33Bpb.oem_name) != "NEXT "))
{
AaruConsole.DebugWriteLine("FAT plugin", "Using Atari BPB");
useAtariBpb = true;
}
else
{
AaruConsole.DebugWriteLine("FAT plugin", "Using DOS 2.0 BPB");
useDos2Bpb = true;
minBootNearJump = 0x16;
}
}
}
}
}
// DEC Rainbow, lacks a BPB but has a very concrete structure...
if (imagePlugin.Info.Sectors == 800 &&
imagePlugin.Info.SectorSize == 512 &&
!useAtariBpb &&
!useMsxBpb &&
!useDos2Bpb &&
!useDos3Bpb &&
!useDos32Bpb &&
!useDos33Bpb &&
!userShortExtendedBpb &&
!useExtendedBpb &&
!useShortFat32 &&
!useLongFat32 &&
!useApricotBpb)
{
// DEC Rainbow boots up with a Z80, first byte should be DI (disable interrupts)
byte z80Di = bpbSector[0];
// First FAT1 sector resides at LBA 0x14
byte[] fat1Sector0 = imagePlugin.ReadSector(0x14);
// First FAT2 sector resides at LBA 0x1A
byte[] fat2Sector0 = imagePlugin.ReadSector(0x1A);
bool equalFatIds = fat1Sector0[0] == fat2Sector0[0] && fat1Sector0[1] == fat2Sector0[1];
// Volume is software interleaved 2:1
var rootMs = new MemoryStream();
foreach (byte[] tmp in from ulong rootSector in new[]
{
0x17, 0x19, 0x1B, 0x1D, 0x1E, 0x20
} select imagePlugin.ReadSector(rootSector))
{
rootMs.Write(tmp, 0, tmp.Length);
}
byte[] rootDir = rootMs.ToArray();
bool validRootDir = true;
// Iterate all root directory
for (int e = 0; e < 96 * 32; e += 32)
{
for (int c = 0; c < 11; c++)
{
if ((rootDir[c + e] < 0x20 && rootDir[c + e] != 0x00 && rootDir[c + e] != 0x05) ||
rootDir[c + e] == 0xFF ||
rootDir[c + e] == 0x2E)
{
validRootDir = false;
break;
}
}
if (!validRootDir)
{
break;
}
}
if (z80Di == 0xF3 &&
equalFatIds &&
(fat1Sector0[0] & 0xF0) == 0xF0 &&
fat1Sector0[1] == 0xFF &&
validRootDir)
{
useDecRainbowBpb = true;
AaruConsole.DebugWriteLine("FAT plugin", "Using DEC Rainbow hardcoded BPB.");
fakeBpb.bps = 512;
fakeBpb.spc = 1;
fakeBpb.rsectors = 20;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 96;
fakeBpb.sectors = 800;
fakeBpb.media = 0xFA;
fakeBpb.sptrk = 10;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 3;
bootable = true;
fakeBpb.boot_code = bpbSector;
return(BpbKind.DecRainbow);
}
}
if (!useAtariBpb &&
!useMsxBpb &&
!useDos2Bpb &&
!useDos3Bpb &&
!useDos32Bpb &&
!useDos33Bpb &&
!useHumanBpb &&
!userShortExtendedBpb &&
!useExtendedBpb &&
!useShortFat32 &&
!useLongFat32 &&
!useApricotBpb &&
!useDecRainbowBpb)
{
byte[] fatSector = imagePlugin.ReadSector(1 + partition.Start);
switch (fatSector[0])
{
case 0xE5:
if (imagePlugin.Info.Sectors == 2002 &&
imagePlugin.Info.SectorSize == 128)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 128;
fakeBpb.spc = 4;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 64;
fakeBpb.sectors = 2002;
fakeBpb.media = 0xE5;
fakeBpb.sptrk = 26;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 1;
}
break;
case 0xFD:
if (imagePlugin.Info.Sectors == 4004 &&
imagePlugin.Info.SectorSize == 128)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 128;
fakeBpb.spc = 4;
fakeBpb.rsectors = 4;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 68;
fakeBpb.sectors = 4004;
fakeBpb.media = 0xFD;
fakeBpb.sptrk = 26;
fakeBpb.heads = 2;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 6;
}
else if (imagePlugin.Info.Sectors == 2002 &&
imagePlugin.Info.SectorSize == 128)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 128;
fakeBpb.spc = 4;
fakeBpb.rsectors = 4;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 68;
fakeBpb.sectors = 2002;
fakeBpb.media = 0xFD;
fakeBpb.sptrk = 26;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 6;
}
break;
case 0xFE:
if (imagePlugin.Info.Sectors == 320 &&
imagePlugin.Info.SectorSize == 512)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB for 5.25\" SSDD.");
fakeBpb.bps = 512;
fakeBpb.spc = 1;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 64;
fakeBpb.sectors = 320;
fakeBpb.media = 0xFE;
fakeBpb.sptrk = 8;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 1;
}
else if (imagePlugin.Info.Sectors == 2002 &&
imagePlugin.Info.SectorSize == 128)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 128;
fakeBpb.spc = 4;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 68;
fakeBpb.sectors = 2002;
fakeBpb.media = 0xFE;
fakeBpb.sptrk = 26;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 6;
}
else if (imagePlugin.Info.Sectors == 1232 &&
imagePlugin.Info.SectorSize == 1024)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 1024;
fakeBpb.spc = 1;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 192;
fakeBpb.sectors = 1232;
fakeBpb.media = 0xFE;
fakeBpb.sptrk = 8;
fakeBpb.heads = 2;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 2;
}
else if (imagePlugin.Info.Sectors == 616 &&
imagePlugin.Info.SectorSize == 1024)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 1024;
fakeBpb.spc = 1;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 6192;
fakeBpb.sectors = 616;
fakeBpb.media = 0xFE;
fakeBpb.sptrk = 8;
fakeBpb.heads = 2;
fakeBpb.hsectors = 0;
}
else if (imagePlugin.Info.Sectors == 720 &&
imagePlugin.Info.SectorSize == 128)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB.");
fakeBpb.bps = 128;
fakeBpb.spc = 2;
fakeBpb.rsectors = 54;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 64;
fakeBpb.sectors = 720;
fakeBpb.media = 0xFE;
fakeBpb.sptrk = 18;
fakeBpb.heads = 1;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 4;
}
else if (imagePlugin.Info.Sectors == 640 &&
imagePlugin.Info.SectorSize == 512)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB for 5.25\" DSDD.");
fakeBpb.bps = 512;
fakeBpb.spc = 2;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 112;
fakeBpb.sectors = 640;
fakeBpb.media = 0xFF;
fakeBpb.sptrk = 8;
fakeBpb.heads = 2;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 1;
}
break;
case 0xFF:
if (imagePlugin.Info.Sectors == 640 &&
imagePlugin.Info.SectorSize == 512)
{
AaruConsole.DebugWriteLine("FAT plugin", "Using hardcoded BPB for 5.25\" DSDD.");
fakeBpb.bps = 512;
fakeBpb.spc = 2;
fakeBpb.rsectors = 1;
fakeBpb.fats_no = 2;
fakeBpb.root_ent = 112;
fakeBpb.sectors = 640;
fakeBpb.media = 0xFF;
fakeBpb.sptrk = 8;
fakeBpb.heads = 2;
fakeBpb.hsectors = 0;
fakeBpb.spfat = 1;
}
break;
}
// This assumes a bootable sector will jump somewhere or disable interrupts in x86 code
bootable |= bpbSector[0] == 0xFA || (bpbSector[0] == 0xEB && bpbSector[1] <= 0x7F) ||
(bpbSector[0] == 0xE9 && BitConverter.ToUInt16(bpbSector, 1) <= 0x1FC);
fakeBpb.boot_code = bpbSector;
return(BpbKind.Hardcoded);
}
if (useExtendedBpb)
{
fakeBpb = ebpb;
return(BpbKind.Extended);
}
if (userShortExtendedBpb)
{
fakeBpb.jump = shortEbpb.jump;
fakeBpb.oem_name = shortEbpb.oem_name;
fakeBpb.bps = shortEbpb.bps;
fakeBpb.spc = shortEbpb.spc;
fakeBpb.rsectors = shortEbpb.rsectors;
fakeBpb.fats_no = shortEbpb.fats_no;
fakeBpb.root_ent = shortEbpb.root_ent;
fakeBpb.sectors = shortEbpb.sectors;
fakeBpb.media = shortEbpb.media;
fakeBpb.spfat = shortEbpb.spfat;
fakeBpb.sptrk = shortEbpb.sptrk;
fakeBpb.heads = shortEbpb.heads;
fakeBpb.hsectors = shortEbpb.hsectors;
fakeBpb.big_sectors = shortEbpb.big_sectors;
fakeBpb.drive_no = shortEbpb.drive_no;
fakeBpb.flags = shortEbpb.flags;
fakeBpb.signature = shortEbpb.signature;
fakeBpb.serial_no = shortEbpb.serial_no;
fakeBpb.boot_code = shortEbpb.boot_code;
fakeBpb.boot_signature = shortEbpb.boot_signature;
return(BpbKind.ShortExtended);
}
if (useDos33Bpb)
{
fakeBpb.jump = dos33Bpb.jump;
fakeBpb.oem_name = dos33Bpb.oem_name;
fakeBpb.bps = dos33Bpb.bps;
fakeBpb.spc = dos33Bpb.spc;
fakeBpb.rsectors = dos33Bpb.rsectors;
fakeBpb.fats_no = dos33Bpb.fats_no;
fakeBpb.root_ent = dos33Bpb.root_ent;
fakeBpb.sectors = dos33Bpb.sectors;
fakeBpb.media = dos33Bpb.media;
fakeBpb.spfat = dos33Bpb.spfat;
fakeBpb.sptrk = dos33Bpb.sptrk;
fakeBpb.heads = dos33Bpb.heads;
fakeBpb.hsectors = dos33Bpb.hsectors;
fakeBpb.big_sectors = dos33Bpb.big_sectors;
fakeBpb.boot_code = dos33Bpb.boot_code;
fakeBpb.boot_signature = dos33Bpb.boot_signature;
return(BpbKind.Dos33);
}
if (useDos32Bpb)
{
fakeBpb.jump = dos32Bpb.jump;
fakeBpb.oem_name = dos32Bpb.oem_name;
fakeBpb.bps = dos32Bpb.bps;
fakeBpb.spc = dos32Bpb.spc;
fakeBpb.rsectors = dos32Bpb.rsectors;
fakeBpb.fats_no = dos32Bpb.fats_no;
fakeBpb.root_ent = dos32Bpb.root_ent;
fakeBpb.sectors = dos32Bpb.sectors;
fakeBpb.media = dos32Bpb.media;
fakeBpb.spfat = dos32Bpb.spfat;
fakeBpb.sptrk = dos32Bpb.sptrk;
fakeBpb.heads = dos32Bpb.heads;
fakeBpb.hsectors = dos32Bpb.hsectors;
fakeBpb.boot_code = dos32Bpb.boot_code;
fakeBpb.boot_signature = dos32Bpb.boot_signature;
return(BpbKind.Dos32);
}
if (useDos3Bpb)
{
fakeBpb.jump = dos30Bpb.jump;
fakeBpb.oem_name = dos30Bpb.oem_name;
fakeBpb.bps = dos30Bpb.bps;
fakeBpb.spc = dos30Bpb.spc;
fakeBpb.rsectors = dos30Bpb.rsectors;
fakeBpb.fats_no = dos30Bpb.fats_no;
fakeBpb.root_ent = dos30Bpb.root_ent;
fakeBpb.sectors = dos30Bpb.sectors;
fakeBpb.media = dos30Bpb.media;
fakeBpb.spfat = dos30Bpb.spfat;
fakeBpb.sptrk = dos30Bpb.sptrk;
fakeBpb.heads = dos30Bpb.heads;
fakeBpb.hsectors = dos30Bpb.hsectors;
fakeBpb.boot_code = dos30Bpb.boot_code;
fakeBpb.boot_signature = dos30Bpb.boot_signature;
return(BpbKind.Dos3);
}
if (useDos2Bpb)
{
fakeBpb.jump = dos2Bpb.jump;
fakeBpb.oem_name = dos2Bpb.oem_name;
fakeBpb.bps = dos2Bpb.bps;
fakeBpb.spc = dos2Bpb.spc;
fakeBpb.rsectors = dos2Bpb.rsectors;
fakeBpb.fats_no = dos2Bpb.fats_no;
fakeBpb.root_ent = dos2Bpb.root_ent;
fakeBpb.sectors = dos2Bpb.sectors;
fakeBpb.media = dos2Bpb.media;
fakeBpb.spfat = dos2Bpb.spfat;
fakeBpb.boot_code = dos2Bpb.boot_code;
fakeBpb.boot_signature = dos2Bpb.boot_signature;
return(BpbKind.Dos2);
}
if (useMsxBpb)
{
fakeBpb.jump = msxBpb.jump;
fakeBpb.oem_name = msxBpb.oem_name;
fakeBpb.bps = msxBpb.bps;
fakeBpb.spc = msxBpb.spc;
fakeBpb.rsectors = msxBpb.rsectors;
fakeBpb.fats_no = msxBpb.fats_no;
fakeBpb.root_ent = msxBpb.root_ent;
fakeBpb.sectors = msxBpb.sectors;
fakeBpb.media = msxBpb.media;
fakeBpb.spfat = msxBpb.spfat;
fakeBpb.sptrk = msxBpb.sptrk;
fakeBpb.heads = msxBpb.heads;
fakeBpb.hsectors = msxBpb.hsectors;
fakeBpb.boot_code = msxBpb.boot_code;
fakeBpb.boot_signature = msxBpb.boot_signature;
fakeBpb.serial_no = msxBpb.serial_no;
// TODO: Is there any way to check this?
bootable = true;
return(BpbKind.Msx);
}
if (useAtariBpb)
{
fakeBpb.jump = atariBpb.jump;
fakeBpb.oem_name = atariBpb.oem_name;
fakeBpb.bps = atariBpb.bps;
fakeBpb.spc = atariBpb.spc;
fakeBpb.rsectors = atariBpb.rsectors;
fakeBpb.fats_no = atariBpb.fats_no;
fakeBpb.root_ent = atariBpb.root_ent;
fakeBpb.sectors = atariBpb.sectors;
fakeBpb.media = atariBpb.media;
fakeBpb.spfat = atariBpb.spfat;
fakeBpb.sptrk = atariBpb.sptrk;
fakeBpb.heads = atariBpb.heads;
fakeBpb.boot_code = atariBpb.boot_code;
return(BpbKind.Atari);
}
if (useApricotBpb)
{
fakeBpb.bps = apricotBpb.mainBPB.bps;
fakeBpb.spc = apricotBpb.mainBPB.spc;
fakeBpb.rsectors = apricotBpb.mainBPB.rsectors;
fakeBpb.fats_no = apricotBpb.mainBPB.fats_no;
fakeBpb.root_ent = apricotBpb.mainBPB.root_ent;
fakeBpb.sectors = apricotBpb.mainBPB.sectors;
fakeBpb.media = apricotBpb.mainBPB.media;
fakeBpb.spfat = apricotBpb.mainBPB.spfat;
fakeBpb.sptrk = apricotBpb.spt;
bootable = apricotBpb.bootType > 0;
if (apricotBpb.bootLocation > 0 &&
apricotBpb.bootLocation + apricotBpb.bootSize < imagePlugin.Info.Sectors)
{
fakeBpb.boot_code = imagePlugin.ReadSectors(apricotBpb.bootLocation,
(uint)(apricotBpb.sectorSize * apricotBpb.bootSize) /
imagePlugin.Info.SectorSize);
}
return(BpbKind.Apricot);
}
return(BpbKind.None);
}
public bool GetInformation(IMediaImage imagePlugin, out List <Partition> partitions, ulong sectorOffset)
{
partitions = new List <Partition>();
// I think Apricot can't chain partitions so.
if (sectorOffset != 0)
{
return(false);
}
byte[] sector = imagePlugin.ReadSector(0);
if (sector.Length < 512)
{
return(false);
}
ApricotLabel label = Marshal.ByteArrayToStructureLittleEndian <ApricotLabel>(sector);
// Not much to check but...
ulong deviceSectors = imagePlugin.Info.Sectors;
ulong deviceSizeAccordingToLabel = label.cylinders * label.heads * label.spt;
if (label.operatingSystem > 4 || label.bootType > 5 || label.partitionCount > 8 ||
deviceSizeAccordingToLabel > deviceSectors || label.firstDataBlock > deviceSectors)
{
return(false);
}
DicConsole.DebugWriteLine("Apricot partitions", "label.version = \"{0}\"",
StringHandlers.CToString(label.version));
DicConsole.DebugWriteLine("Apricot partitions", "label.operatingSystem = {0} ({1})", label.operatingSystem,
label.operatingSystem < operatingSystemCodes.Length
? operatingSystemCodes[label.operatingSystem]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.writeProtected = {0}", label.writeProtected);
DicConsole.DebugWriteLine("Apricot partitions", "label.copyProtected = {0}", label.copyProtected);
DicConsole.DebugWriteLine("Apricot partitions", "label.bootType = {0} ({1})", label.bootType,
label.bootType < bootTypeCodes.Length
? bootTypeCodes[label.bootType]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.partitionCount = {0}", label.partitionCount);
DicConsole.DebugWriteLine("Apricot partitions", "label.winchester = {0}", label.winchester);
DicConsole.DebugWriteLine("Apricot partitions", "label.sectorSize = {0}", label.sectorSize);
DicConsole.DebugWriteLine("Apricot partitions", "label.spt = {0}", label.spt);
DicConsole.DebugWriteLine("Apricot partitions", "label.cylinders = {0}", label.cylinders);
DicConsole.DebugWriteLine("Apricot partitions", "label.heads = {0}", label.heads);
DicConsole.DebugWriteLine("Apricot partitions", "label.interleave = {0}", label.interleave);
DicConsole.DebugWriteLine("Apricot partitions", "label.skew = {0}", label.skew);
DicConsole.DebugWriteLine("Apricot partitions", "label.bootLocation = {0}", label.bootLocation);
DicConsole.DebugWriteLine("Apricot partitions", "label.bootSize = {0}", label.bootSize);
DicConsole.DebugWriteLine("Apricot partitions", "label.bootAddress = 0x{0:X8}", label.bootAddress);
DicConsole.DebugWriteLine("Apricot partitions", "label.bootOffset:label.bootSegment = {0:X4}:{1:X4}",
label.bootOffset, label.bootSegment);
DicConsole.DebugWriteLine("Apricot partitions", "label.firstDataBlock = {0}", label.firstDataBlock);
DicConsole.DebugWriteLine("Apricot partitions", "label.generation = {0}", label.generation);
DicConsole.DebugWriteLine("Apricot partitions", "label.copyCount = {0}", label.copyCount);
DicConsole.DebugWriteLine("Apricot partitions", "label.maxCopies = {0}", label.maxCopies);
DicConsole.DebugWriteLine("Apricot partitions", "label.serialNumber = \"{0}\"",
StringHandlers.CToString(label.serialNumber));
DicConsole.DebugWriteLine("Apricot partitions", "label.partNumber = \"{0}\"",
StringHandlers.CToString(label.partNumber));
DicConsole.DebugWriteLine("Apricot partitions", "label.copyright = \"{0}\"",
StringHandlers.CToString(label.copyright));
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.bps = {0}", label.mainBPB.bps);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.spc = {0}", label.mainBPB.spc);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.rsectors = {0}", label.mainBPB.rsectors);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.fats_no = {0}", label.mainBPB.fats_no);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.root_ent = {0}", label.mainBPB.root_ent);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.sectors = {0}", label.mainBPB.sectors);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.media = {0}", label.mainBPB.media);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.spfat = {0}", label.mainBPB.spfat);
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.diskType = {0} ({1})",
label.mainBPB.diskType,
label.mainBPB.diskType < diskTypeCodes.Length
? diskTypeCodes[label.mainBPB.diskType]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.mainBPB.startSector = {0}",
label.mainBPB.startSector);
DicConsole.DebugWriteLine("Apricot partitions", "label.fontName = \"{0}\"",
StringHandlers.CToString(label.fontName));
DicConsole.DebugWriteLine("Apricot partitions", "label.keyboardName = \"{0}\"",
StringHandlers.CToString(label.keyboardName));
DicConsole.DebugWriteLine("Apricot partitions", "label.biosMajorVersion = {0}", label.biosMajorVersion);
DicConsole.DebugWriteLine("Apricot partitions", "label.biosMinorVersion = {0}", label.biosMinorVersion);
DicConsole.DebugWriteLine("Apricot partitions", "label.diagnosticsFlag = {0}", label.diagnosticsFlag);
DicConsole.DebugWriteLine("Apricot partitions", "label.prnDevice = {0} ({1})", label.prnDevice,
label.prnDevice < printDevices.Length
? printDevices[label.prnDevice]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.bellVolume = {0}", label.bellVolume);
DicConsole.DebugWriteLine("Apricot partitions", "label.enableCache = {0}", label.enableCache);
DicConsole.DebugWriteLine("Apricot partitions", "label.enableGraphics = {0}", label.enableGraphics);
DicConsole.DebugWriteLine("Apricot partitions", "label.dosLength = {0}", label.dosLength);
DicConsole.DebugWriteLine("Apricot partitions", "label.fontLength = {0}", label.fontLength);
DicConsole.DebugWriteLine("Apricot partitions", "label.keyboardLength = {0}", label.keyboardLength);
DicConsole.DebugWriteLine("Apricot partitions", "label.dosStart = {0}", label.dosStart);
DicConsole.DebugWriteLine("Apricot partitions", "label.fontStart = {0}", label.fontStart);
DicConsole.DebugWriteLine("Apricot partitions", "label.keyboardStart = {0}", label.keyboardStart);
DicConsole.DebugWriteLine("Apricot partitions", "label.keyboardVolume = {0}", label.keyboardVolume);
DicConsole.DebugWriteLine("Apricot partitions", "label.autorepeat = {0}", label.autorepeat);
DicConsole.DebugWriteLine("Apricot partitions", "label.autorepeatLeadIn = {0}", label.autorepeatLeadIn);
DicConsole.DebugWriteLine("Apricot partitions", "label.autorepeatInterval = {0}", label.autorepeatInterval);
DicConsole.DebugWriteLine("Apricot partitions", "label.microscreenMode = {0}", label.microscreenMode);
DicConsole.DebugWriteLine("Apricot partitions", "label.spareKeyboard is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareKeyboard));
DicConsole.DebugWriteLine("Apricot partitions", "label.lineMode = {0} ({1} lines)", label.lineMode,
label.lineMode < lineModes.Length ? lineModes[label.lineMode] : 0);
DicConsole.DebugWriteLine("Apricot partitions", "label.lineWidth = {0} ({1} columns)", label.lineWidth,
label.lineWidth < lineWidths.Length ? lineWidths[label.lineWidth] : 0);
DicConsole.DebugWriteLine("Apricot partitions", "label.imageOff = {0}", label.imageOff);
DicConsole.DebugWriteLine("Apricot partitions", "label.spareScreen is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareScreen));
DicConsole.DebugWriteLine("Apricot partitions", "label.txBaudRate = {0} ({1} bps)", label.txBaudRate,
label.txBaudRate < baudRates.Length ? baudRates[label.txBaudRate] : 0);
DicConsole.DebugWriteLine("Apricot partitions", "label.rxBaudRate = {0} ({1} bps)", label.rxBaudRate,
label.rxBaudRate < baudRates.Length ? baudRates[label.rxBaudRate] : 0);
DicConsole.DebugWriteLine("Apricot partitions", "label.txBits = {0}", label.txBits);
DicConsole.DebugWriteLine("Apricot partitions", "label.rxBits = {0}", label.rxBits);
DicConsole.DebugWriteLine("Apricot partitions", "label.stopBits = {0} ({1} bits)", label.stopBits,
label.stopBits < stopBits.Length ? stopBits[label.stopBits] : 0);
DicConsole.DebugWriteLine("Apricot partitions", "label.parityCheck = {0}", label.parityCheck);
DicConsole.DebugWriteLine("Apricot partitions", "label.parityType = {0} ({1})", label.parityType,
label.parityType < parityTypes.Length
? parityTypes[label.parityType]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.txXonXoff = {0}", label.txXonXoff);
DicConsole.DebugWriteLine("Apricot partitions", "label.rxXonXoff = {0}", label.rxXonXoff);
DicConsole.DebugWriteLine("Apricot partitions", "label.xonCharacter = {0}", label.xonCharacter);
DicConsole.DebugWriteLine("Apricot partitions", "label.xoffCharacter = {0}", label.xoffCharacter);
DicConsole.DebugWriteLine("Apricot partitions", "label.rxXonXoffBuffer = {0}", label.rxXonXoffBuffer);
DicConsole.DebugWriteLine("Apricot partitions", "label.dtrDsr = {0}", label.dtrDsr);
DicConsole.DebugWriteLine("Apricot partitions", "label.ctsRts = {0}", label.ctsRts);
DicConsole.DebugWriteLine("Apricot partitions", "label.nullsAfterCr = {0}", label.nullsAfterCr);
DicConsole.DebugWriteLine("Apricot partitions", "label.nullsAfterFF = {0}", label.nullsAfterFF);
DicConsole.DebugWriteLine("Apricot partitions", "label.lfAfterCRSerial = {0}", label.lfAfterCRSerial);
DicConsole.DebugWriteLine("Apricot partitions", "label.biosErrorReportSerial = {0}",
label.biosErrorReportSerial);
DicConsole.DebugWriteLine("Apricot partitions", "label.spareSerial is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareSerial));
DicConsole.DebugWriteLine("Apricot partitions", "label.lfAfterCrParallel = {0}", label.lfAfterCrParallel);
DicConsole.DebugWriteLine("Apricot partitions", "label.selectLine = {0}", label.selectLine);
DicConsole.DebugWriteLine("Apricot partitions", "label.paperEmpty = {0}", label.paperEmpty);
DicConsole.DebugWriteLine("Apricot partitions", "label.faultLine = {0}", label.faultLine);
DicConsole.DebugWriteLine("Apricot partitions", "label.biosErrorReportParallel = {0}",
label.biosErrorReportParallel);
DicConsole.DebugWriteLine("Apricot partitions", "label.spareParallel is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareParallel));
DicConsole.DebugWriteLine("Apricot partitions", "label.spareWinchester is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareWinchester));
DicConsole.DebugWriteLine("Apricot partitions", "label.parkingEnabled = {0}", label.parkingEnabled);
DicConsole.DebugWriteLine("Apricot partitions", "label.formatProtection = {0}", label.formatProtection);
DicConsole.DebugWriteLine("Apricot partitions", "label.spareRamDisk is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spareRamDisk));
for (int i = 0; i < 32; i++)
{
DicConsole.DebugWriteLine("Apricot partitions", "label.badBlocks[{1}] = {0}", label.badBlocks[i], i);
}
for (int i = 0; i < 8; i++)
{
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].bps = {0}",
label.partitions[i].bps, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].spc = {0}",
label.partitions[i].spc, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].rsectors = {0}",
label.partitions[i].rsectors, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].fats_no = {0}",
label.partitions[i].fats_no, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].root_ent = {0}",
label.partitions[i].root_ent, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].sectors = {0}",
label.partitions[i].sectors, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].media = {0}",
label.partitions[i].media, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].spfat = {0}",
label.partitions[i].spfat, i);
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].diskType = {0} ({2})",
label.partitions[i].diskType, i,
label.partitions[i].diskType < diskTypeCodes.Length
? diskTypeCodes[label.partitions[i].diskType]
: "Unknown");
DicConsole.DebugWriteLine("Apricot partitions", "label.partitions[{1}].startSector = {0}",
label.partitions[i].startSector, i);
}
DicConsole.DebugWriteLine("Apricot partitions", "label.spare is null? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(label.spare));
DicConsole.DebugWriteLine("Apricot partitions", "label.cpmDoubleSided = {0}", label.cpmDoubleSided);
// Only hard disks can contain partitions
if (!label.winchester)
{
return(false);
}
for (byte i = 0; i < label.partitionCount; i++)
{
Partition part = new Partition
{
Start = label.partitions[i].startSector,
Size = (ulong)(label.partitions[i].sectors * label.sectorSize),
Length = label.partitions[i].sectors,
Type = "ACT Apricot partition",
Sequence = i,
Scheme = Name,
Offset = (ulong)(label.partitions[i].startSector * label.sectorSize)
};
if (part.Start < deviceSectors && part.End < deviceSectors)
{
partitions.Add(part);
}
}
return(partitions.Count > 0);
}
