Format of FGDRIVER PCXRANGE variable pointer record:
Offset	Size	Description	)
 00h	WORD	segment of 128-byte PCX file header
 02h	WORD	offset of 128-byte PCX file header
 04h	WORD	segment of WORD buffer for X coordinate of image's left edge
 04h	WORD	offset of WORD buffer for X coordinate of image's left edge
 08h	WORD	segment of WORD buffer for X coordinate of image's right edge
 0Ah	WORD	offset of WORD buffer for X coordinate of image's right edge
 0Ch	WORD	segment of WORD buffer for Y coordinate of image's top edge
 0Eh	WORD	offset of WORD buffer for Y coordinate of image's top edge
 10h	WORD	segment of WORD buffer for X coordinate of image's bottom edge
 12h	WORD	offset of WORD buffer for X coordinate of image's bottom edge
SeeAlso: #03494