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* DiscImageChef.DiscImages/DiskCopy42.cs:

Browse Source 
Swap tracks in second half of twiggy images.

	* DiscImageChef.Filesystems/UCSDPascal/File.cs:
	* DiscImageChef.Filesystems/UCSDPascal/Super.cs:
	  Corrected file size calculation.
This commit is contained in:
Natalia Portillo
2016-07-31 22:12:48 +01:00
parent d4fa3b3e1b
commit 258e32d733
5 changed files with 126 additions and 25 deletions
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4
DiscImageChef.DiscImages/ChangeLog
View File

@@ -1,3 +1,7 @@
2016-07-31 Natalia Portillo <claunia@claunia.com>
* DiskCopy42.cs: Swap tracks in second half of twiggy images.
2016-07-29 Natalia Portillo <claunia@claunia.com>
* DiscImageChef.DiscImages.csproj: Bump to version 3.1.0.

92
DiscImageChef.DiscImages/DiskCopy42.cs
View File

@@ -124,6 +124,10 @@ namespace DiscImageChef.ImagePlugins
/// <summary>Disk image file</summary>
string dc42ImagePath;
byte[] twiggyCache;
byte[] twiggyCacheTags;
bool twiggy;
#endregion
public DiskCopy42()
@@ -369,6 +373,58 @@ namespace DiscImageChef.ImagePlugins
break;
}
if(ImageInfo.mediaType == MediaType.AppleFileWare)
{
DicConsole.DebugWriteLine("DC42 plugin", "Twiggy detected, reversing second half of disk", bptag);
byte[] data = new byte[header.dataSize];
byte[] tags = new byte[header.tagSize];
twiggyCache = new byte[header.dataSize];
twiggyCacheTags = new byte[header.tagSize];
twiggy = true;
FileStream datastream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
datastream.Seek((dataOffset), SeekOrigin.Begin);
datastream.Read(data, 0, (int)header.dataSize);
datastream.Close();
FileStream tagstream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
tagstream.Seek((tagOffset), SeekOrigin.Begin);
tagstream.Read(tags, 0, (int)header.tagSize);
tagstream.Close();
Array.Copy(data, 0, twiggyCache, 0, header.dataSize / 2);
Array.Copy(tags, 0, twiggyCacheTags, 0, header.tagSize / 2);
int copiedSectors = 0;
int sectorsToCopy = 0;
for(int i = 0; i < 46; i++)
{
if(i >= 0 && i <= 3)
sectorsToCopy = 22;
if(i >= 4 && i <= 10)
sectorsToCopy = 21;
if(i >= 11 && i <= 16)
sectorsToCopy = 20;
if(i >= 17 && i <= 22)
sectorsToCopy = 19;
if(i >= 23 && i <= 28)
sectorsToCopy = 18;
if(i >= 29 && i <= 34)
sectorsToCopy = 17;
if(i >= 35 && i <= 41)
sectorsToCopy = 16;
if(i >= 42 && i <= 45)
sectorsToCopy = 15;
Array.Copy(data, header.dataSize / 2 + copiedSectors * 512, twiggyCache, twiggyCache.Length - copiedSectors * 512 - sectorsToCopy * 512, sectorsToCopy * 512);
Array.Copy(tags, header.tagSize / 2 + copiedSectors * bptag, twiggyCacheTags, twiggyCacheTags.Length - copiedSectors * bptag - sectorsToCopy * bptag, sectorsToCopy * bptag);
copiedSectors += sectorsToCopy;
}
}
return true;
}
@@ -479,13 +535,17 @@ namespace DiscImageChef.ImagePlugins
byte[] buffer = new byte[length * ImageInfo.sectorSize];
FileStream stream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
stream.Seek((long)(dataOffset + sectorAddress * ImageInfo.sectorSize), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * ImageInfo.sectorSize));
stream.Close();
if(twiggy)
{
Array.Copy(twiggyCache, (int)sectorAddress * ImageInfo.sectorSize, buffer, 0, length * ImageInfo.sectorSize);
}
else
{
FileStream stream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
stream.Seek((long)(dataOffset + sectorAddress * ImageInfo.sectorSize), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * ImageInfo.sectorSize));
stream.Close();
}
return buffer;
}
@@ -506,13 +566,17 @@ namespace DiscImageChef.ImagePlugins
byte[] buffer = new byte[length * bptag];
FileStream stream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
stream.Seek((long)(tagOffset + sectorAddress * bptag), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * bptag));
stream.Close();
if(twiggy)
{
Array.Copy(twiggyCacheTags, (int)sectorAddress * bptag, buffer, 0, length * bptag);
}
else
{
FileStream stream = new FileStream(dc42ImagePath, FileMode.Open, FileAccess.Read);
stream.Seek((long)(tagOffset + sectorAddress * bptag), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * bptag));
stream.Close();
}
return buffer;
}