public static async Task <T64> FromStream(Stream stream)
{
var tape = new T64();
var tapeRecordBytes = new byte[64];
await stream.ReadAsync(tapeRecordBytes, 0, tapeRecordBytes.Length);
tape.tapeDescription = Encoding.ASCII.GetString(tapeRecordBytes, 0, 32).Trim(' ', '\x0', '\xa0');
tape.directoryEntries = tapeRecordBytes[34] + (tapeRecordBytes[35] << 8);
tape.usedEntries = tapeRecordBytes[36] + (tapeRecordBytes[37] << 8);
tape.userDescription = Encoding.ASCII.GetString(tapeRecordBytes, 40, 24).Trim(' ', '\x0', '\xa0');
tape.files = new List <T64FileEntry>();
for (var i = 0; i < tape.directoryEntries; i++)
{
var fileEntry = new T64FileEntry();
var fileRecordBytes = new byte[32];
await stream.ReadAsync(fileRecordBytes, 0, fileRecordBytes.Length);
fileEntry.entryType = fileRecordBytes[0];
fileEntry.C64FileType = fileRecordBytes[1];
fileEntry.startAddress = fileRecordBytes[2] + (fileRecordBytes[3] << 8);
fileEntry.endAddress = fileRecordBytes[4] + (fileRecordBytes[5] << 8);
fileEntry.offsetFile = fileRecordBytes[8] + (fileRecordBytes[9] << 8) + (fileRecordBytes[10] << 16) + (fileRecordBytes[11] << 24);
fileEntry.c64FileName = Encoding.ASCII.GetString(fileRecordBytes, 16, 16).Trim(' ', '\x0', '\xa0');
tape.files.Add(fileEntry);
}
foreach (var file in tape.files.OrderBy(xx => xx.offsetFile))
{
stream.Seek(file.offsetFile, SeekOrigin.Begin);
file.bytes = new byte[file.endAddress - file.startAddress];
await stream.ReadAsync(file.bytes, 0, file.bytes.Length);
}
return(tape);
}
static async Task Main(string[] args)
{
var filenameT64 = @"E:\Commodore 64\media\zyronesc.T64";
using (var streamT64 = File.OpenRead(filenameT64))
{
var tape = await T64.FromStream(streamT64);
var filenameD64 = @"E:\Commodore 64\media\zyronesc.D64";
using (var streamD64 = File.OpenWrite(filenameD64))
{
var disk = await D64.Empty();
disk.DiskName(tape.userDescription).DosType("2A");
foreach (var file in tape.files.OrderBy(xx => xx.offsetFile))
{
disk.Write(D64FileType.PRG, file.c64FileName, file.bytes);
}
await disk.WriteTo(streamD64);
}
}
}
