Format of DPMS lock DDS:
Offset	Size	Description	)
 00h	DWORD	total size in bytes
 04h	DWORD	offset
 08h	WORD	segment or selector
 0Ah	WORD	reserved
 0Ch	WORD	maximum number of physical blocks structure has space for
 0Eh	WORD	number of physical blocks listed
 10h	DWORD	physical address of first block
 14h	DWORD	size in bytes of first block
	...