Format of HBBR parameter block:
Offset	Size	Description	)
 00h	WORD	000Ch or 0014h (length of following data)
 02h	WORD	data format
		0000h across-the-plane copy (color expansion)
		0008h through-the-plane copy
 04h	WORD	data rectangle's width
 06h	WORD	data rectangle's height
 08h	BYTE	source bit plane number
 09h	BYTE	reserved
 0Ah  2 WORDs	X,Y coordinates of destination's upper-left corner in
		  display memory
---optional---
 0Eh	WORD	sub-rectangle left margin in pixels
 10h	WORD	sub-rectangle top margin in pixels
 12h	WORD	sub-rectangle width
 14h	WORD	sub-rectangle height
SeeAlso: #03891,#03892,#03894