Eldos Solid File System ST XFS

Back to index | Edit this page

ST, XFS

• Format Type : Archive
  
• Endian Order : Little Endian
  

Format Specifications

// Eldos Solid File System 
// ST, XFS file format

// header
2 bytes (uint16) - unknown // 12
2 bytes (char) - magic  // NW
num_of_entries *
{
  2 bytes (uint16) - entry type  // 33 - directory info structure
                                 // 32 - any other structure with data?
                                 // 0 - end structure or nothing
}
x bytes - padding


// file system info?
2 bytes (char) - magic  // NW
2 bytes - nulls
2 bytes - unknown // 1
8 bytes - nulls
4 bytes - next line characters // \x0D\x00\x0A\x00
124 bytes (char) - storage logo name // default is "SolFS for Windows (c) EldoS Corporation\n"
5 bytes - nulls
4 bytes (uint32) - unknown // 4
4 bytes (uint32) - unknown // 260, 516, 1028, 1540 or 2308
4 bytes (uint32) - unknown // 256, 1792, 4608, 12288 or 12800
93 bytes - unknown
4 bytes (uint32) - some CRC value  // e.g. \x95\xAF\x25\x3B
x bytes - padding



// unknown structure  
4 bytes (uint32) - entry type // 32
4 bytes (uint32) - entry ID // e.g. 2
68-102 bytes - unknown
x bytes - padding


// Note: data ends right after this structure 
// when there are no files and no directories in the XFS/ST file.




// Note: First directory is always root,
// then there are sructures for all sub-directories in the filesystem.

num_of_directories *
{
   // directory info structure
   4 bytes (uint32) - entry type  // 33
   4 bytes (uint32) - entry ID  // e.g. 7
   24 bytes - unknown
   num_of_files_in_directory *
   {
      8 bytes - unknown
      4 bytes (uint32) - directory or file attributes  // e.g. 257 - file + hidden
                                                       // e.g. 2 - directory
      4 bytes (uint32) - directory or file name length
      4 bytes - nulls
      44 bytes (char) - directory or file name // e.g. "DIR_2" or "text3.txt"
   }



   num_of_files_in_directory *
   {
      // file data structure
      4 bytes (uint32) - entry type  // 32
      4 bytes (uint32) - entry ID  // e.g. 8
      44 bytes - unknown
      8 bytes (double) - creation time
      8 bytes (double) - modification time
      8 bytes (double) - last access time
      4 bytes (uint32) - file size
      16 bytes - unknown
      x bytes - file data
      x bytes - padding
   }

}



num_of_directories *
{
   // end structure
   4 bytes (uint32) - entry type  // 0
   4 bytes (uint32) - entry ID  // e.g. 17
   x bytes - padding
}

MultiEx BMS Script

Not written yet.

Attributes

This file format supports storing informmation about directory and file attributes.
Below tables lists all attributes names and values.

Attribute name	Value (Hex)	Value (Dec)
File	0x01	1
Directory	0x02	2
Compressed	0x08	8
Encrypted	0x10	16
SymLink	0x20	32
ReadOnly	0x40	64
Archive	0x80	128
Hidden	0x100	256
System	0x200	512
Temporary	0x400	1024
DeleteOnClose	0x800	2048
Reserved0	0x1000	4096
Reserved1	0x2000	8192
Reserved2	0x4000	16384
Reserved3	0x8000	32768
UserDefined	0xFFFF0000	4294901760
AnyFile	0xFFFFFFFF	4294967295

Notes and Comments

• This is format used by Eldos Solid File System.
• Files can be encrypted with AES and compressed with ZLIB. Whole archive may be encrypted with AES. Custom encryption is also supported.
• Padding size depends on page size which can be set to 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 or 65536 bytes.

Games

List of games using this file format:

• Rakion
• Rakion Chaos Force

Compatible Programs

• SolFS Explorer
• Solid File System OS 5.1

See Also

• Solid File System description
• Solid File System versions comparsion