Format of HBBC parameter block:
Offset	Size	Description	)
 00h	WORD	0010h (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 (across-the-plane copies only)
 09h	BYTE	reserved
 0Ah  2 WORDs	X,Y coordinates of source's upper-left corner in display memory
 0Eh  2 WORDs	X,Y coordinates of destination's upper-left corner in
		  display memory
Note:	copies data from one location in video memory to another
SeeAlso: #03891