====== 4CC Binary Blob Format ======
  * **Header**:
    * **4CC**: 4 byte character code
    * **bytelength**: 4 byte unsigned payload size in bytes
  * **Payload**:
    * **data**: payload data max 2^32 bytes

===== Constraints =====
  * Only write whole structure
    * There will be no case in which a partial 4CC binary blob will be rewritten


===== Example =====
  * '_' specifies whitespace (0x20)

^  Header  ^^  Payload  ^
|  4CC  |  bytelength  |  data  |
^  4  ^  4  ^  n/a  ^
|  '__ID'  |  0x3  |  'DIA'  |
|  '_REV'  |  0x1  |  0xa  |
|  '_SER'  |  0xa  |  '6502400001'  |

==== Efficiency ====

  * **Payload:** 14 bytes
  * **Overhead:** 24 bytes
  * -> 37%

====== Directory Extension ======
  * First bit (MSB) of first byte of 4CC field is directory extension bit
  * If set data field will start with another header

===== Example =====

  * 4CC  = '_SER' = 0x20534552
  * 4CC* = 0xa0534552
  * **4CC***: 4 byte character code field with directory extension bit set

^  Header  ^^  Payload  ^^^
| | ^  Header  ^^  Payload  ^
|  4CC*  |  bytelength  |  4CC  |  bytelength  |  data  |