Changes

Byte 00: User number(value from 0 to 15 or #E5 for deleted entries)Byte 01 to 08: filename(fill unused char with spaces)Byte 09 bis 11: Extension(fill unused char with spaces)Byte 16: first block (tape only)Byte 17: first block (tape only)Byte 18: type-byte(0: basic 1:protected 2:binary)Byte 21 and 22: loading addressLSB firstByte 23: first block (tape only?)Byte 24 and 25: file lengthLSB firstByte 26 and 27: execution address for machine code programsLSB firstByte 64 and 6566: (24 bits file length)LSB firstByte 67 and 68: checksum for byte 00 to byte 66LSB firstByte 69 to 127: undefined content, free to use