Format of VINES Function 0004h/Subfunction 0007h request block:
Offset	Size	Description	)
 00h	WORD	0007h
 02h	BYTE	request ID (0..7) (see #03409)
 03h	WORD	buffer for pointer segment
 05h	WORD	buffer for pointer offset
SeeAlso: #03410,#03411