[chunck]
[header][data]
Header = CCCLLLLL
C=chunck type
L=Length

If header is FF, data end

000: Write the following LLLLL+1 bytes of data
001: Followed by a single byte which is writen LLLLL+1 times
010: Followed by two bytes which are repeated for a total of LLLLL+1 written bytes
011: Followed by a single byte which is written LLLLL+1 times, but it's increased by one after each write
101,110: Unused
111: Signifies 2 bytes:

Header is now:

[111CCCLL LLLLLLLL]

1=1
C=Chunck header (see above)
L=Length