Format of FGDRIVER GETCLIP variable pointer record:
Offset	Size	Description	)
 00h	WORD	segment of WORD buffer for minimum X coordinate (left edge)
 02h	WORD	offset of WORD buffer for minimum X coordinate (left edge)
 04h	WORD	segment of WORD buffer for maximum X coordinate (right edge)
 06h	WORD	offset of WORD buffer for maximum X coordinate (right edge)
 08h	WORD	segment of WORD buffer for minimum Y coordinate (top edge)
 0Ah	WORD	offset of WORD buffer for minimum Y coordinate (top edge)
 0Ch	WORD	segment of WORD buffer for maximum Y coordinate (bottom edge)
 0Eh	WORD	offset of WORD buffer for maximum Y coordinate (bottom edge)