Format of client registration structure:
Offset	Size	Description	)
 00h	PWORD	link to next structure
 06h	PWORD	link to previous structure
 0Ch  2 BYTEs	client version (major, minor)
 0Eh 20 BYTEs	client name
 22h	DWORD	physical address of client start
 26h	DWORD	client's total size in bytes
Note:	the link area should not be modified once the structure has been
	  used for the registration call