Format of HBBW parameter block:
Offset	Size	Description	)
 00h	WORD	000Ah or 0012h (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  2 WORDs	X,Y coordinates of destination in display memory
---optional---
 0Ch	WORD	sub-rectangle left margin in pixels
 0Eh	WORD	sub-rectangle top margin in pixels
 10h	WORD	sub-rectangle width
 12h	WORD	sub-rectangle height
SeeAlso: #03891,#03893,#03894